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- Added documentation via mdbook
- Created basic VS code extension
- Implemented if else blocks and changed some syntax
- fixed some issues
This commit is contained in:
tototomate123
2025-11-02 19:56:26 +01:00
parent 78959d4f22
commit af0a1632c0
40 changed files with 14014 additions and 177 deletions
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3
.gitignore vendored
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@@ -1 +1,2 @@
target target
node_modules

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Cargo.lock generated
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@@ -271,6 +271,7 @@ name = "rush"
version = "0.1.0" version = "0.1.0"
dependencies = [ dependencies = [
"assert_cmd", "assert_cmd",
"libc",
"predicates 1.0.8", "predicates 1.0.8",
"serde", "serde",
"serde_json", "serde_json",

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Cargo.toml
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@@ -8,6 +8,7 @@ tokio = { version = "1", features = ["full"] }
thiserror = "1.0" thiserror = "1.0"
serde = { version = "1.0", features = ["derive"] } serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0" serde_json = "1.0"
libc = "0.2"
[dev-dependencies] [dev-dependencies]
assert_cmd = "2.0" assert_cmd = "2.0"

674
LICENSE.txt Normal file
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@@ -0,0 +1,674 @@
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along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

93
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# rush - A Modern Shell Scripting Language Interpreter # Rush
## Overview > ⚠️ **AI-Generated Content Notice**: Much of this project's documentation has been generated with AI and may contain errors or incomplete information. This will get replaced as development continues. **This is experimental software and NOT recommended for production use.**
Rush is a modern shell scripting language interpreter designed to execute scripts written in the `.rsh` format. It supports features such as variable assignment, control flow, and parallel execution, making it a powerful tool for automating tasks and scripting.
More info coming soon Rush is an experimental shell scripting language interpreter that combines simple syntax with strict validation and built-in concurrency.
## Features
- **Variable interpolation** with validation
- **Built-in variables** (`$USER`, `$HOME`, `$IS_ROOT`)
- **Control flow** with `if`/`else` and `not`
- **For loops** for iteration
- **Parallel execution** blocks for concurrent tasks
- **Strict parsing** that catches errors before execution
## Quick Start
**Build:**
```bash
cargo build --release
```
**Your first script** (`hello.rsh`):
```rush
#!/usr/bin/env rush
NAME = "World"
echo "Hello, $NAME!"
```
**Run:**
```bash
./target/debug/rush hello.rsh
```
## Documentation
📚 **[Read the full documentation](docs/)** (built with mdBook)
**Build and view docs locally:**
```bash
mdbook serve docs
```
Then open http://localhost:3000 in your browser.
**Or build static HTML:**
```bash
mdbook build docs
# Open docs/book/index.html
```
## Example Scripts
The documentation includes comprehensive examples:
- **Web Deployment** - Multi-server deployment with parallel execution
- **System Maintenance** - Permission-aware system tasks
- **Data Pipeline** - Parallel batch processing
- **CI/CD Pipeline** - Build, test, and deploy automation
- **Database Backup** - Backup with integrity verification
See the [Examples](docs/src/examples/) section in the documentation.
## Project Status
**⚠️ Experimental - Not for Production**
Rush is under active development. The language design and implementation are subject to change. Current capabilities:
- ✅ Basic scripting features
- ✅ Parallel execution
- ✅ Variable interpolation
- ⚠️ Limited command support
- ❌ No package management
- ❌ No module system
- ❌ Limited error handling
**Do not use Rush for:**
- Production systems
- Critical automation
- Enterprise deployments
- Anything requiring stability
## Contributing
Found an issue? Have a suggestion? Contributions are welcome! This project is experimental and could benefit from community input.
## License
See LICENSE file for details.

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book
docs/book/

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@@ -0,0 +1,14 @@
[book]
authors = ["tototomate123"]
language = "en"
src = "src"
title = "Rush Documentation"
description = "Documentation for the Rush experimental scripting language"
[output.html]
git-repository-url = "https://github.com/yourusername/rush"
edit-url-template = "https://github.com/yourusername/rush/edit/main/docs/{path}"
[output.html.playground]
editable = false
copyable = true

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# Summary
[Introduction](./introduction.md)
# Getting Started
- [Installation](./getting-started/installation.md)
- [Quick Start](./getting-started/quick-start.md)
# Language Guide
- [Variables](./language/variables.md)
- [Control Flow](./language/control-flow.md)
- [Loops](./language/loops.md)
- [Parallel Execution](./language/parallel.md)
- [Built-in Variables](./language/builtins.md)
# Examples
- [Web Deployment](./examples/web-deploy.md)
- [System Maintenance](./examples/system-maintenance.md)
- [Data Pipeline](./examples/data-pipeline.md)
- [CI/CD Pipeline](./examples/ci-pipeline.md)
- [Database Backup](./examples/db-backup.md)

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# CI/CD Pipeline
> ⚠️ This documentation is AI-generated and may contain errors.
Continuous Integration/Deployment pipeline with parallel testing.
## Script
See `/examples/ci_pipeline.rsh` in the repository.
```rush
#!/usr/bin/env rush
PROJECT = "my-rust-app"
BRANCH = "main"
BUILD_ID = "build-12345"
echo "=== CI/CD Pipeline ==="
echo "Project: $PROJECT"
# Environment validation
if $IS_ROOT {
echo "ERROR: Do not run CI/CD pipeline as root"
exit 1
}
# Build stages (sequential)
for stage in checkout lint test build package {
echo "[$BUILD_ID] Stage: $stage"
if $stage {
echo "[$BUILD_ID] ✓ $stage completed"
}
}
# Run tests in parallel
parallel {
run {
echo "[unit-tests] Running unit tests..."
echo "[unit-tests] 127 tests passed"
}
run {
echo "[integration-tests] Running integration tests..."
echo "[integration-tests] 45 tests passed"
}
run {
echo "[lint-check] Running cargo clippy..."
echo "[lint-check] No warnings found"
}
}
# Multi-environment deployment
for env in dev staging prod {
DEPLOY_URL = "https://$PROJECT.$env.example.com"
echo "[$env] Deployment target: $DEPLOY_URL"
}
```
## Key Concepts
- **Security check**: Refuse to run as root
- **Sequential build**: Steps that depend on each other
- **Parallel tests**: Independent test suites run simultaneously
- **Multi-environment deployment**: Same code deployed to different environments

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# Data Pipeline
> ⚠️ This documentation is AI-generated and may contain errors.
Data processing pipeline showing how to process multiple batches in parallel.
## Script
See `/examples/data_pipeline.rsh` in the repository.
```rush
#!/usr/bin/env rush
DATASET = "user_analytics"
INPUT_DIR = "$HOME/data/raw"
OUTPUT_DIR = "$HOME/data/processed"
BATCH_SIZE = "1000"
echo "Data Processing Pipeline: $DATASET"
# Pre-processing stages
for stage in validate clean normalize {
STAGE_UPPER = "$stage"
echo " Stage: $STAGE_UPPER"
}
# Process batches in parallel
BATCH_1_IN = "$INPUT_DIR/batch_001.csv"
BATCH_1_OUT = "$OUTPUT_DIR/batch_001.json"
# ... (define other batches)
parallel {
run {
echo "[batch_001] Processing $BATCH_1_IN -> $BATCH_1_OUT"
echo "[batch_001] Transformed 1000 records"
}
run {
echo "[batch_002] Processing $BATCH_2_IN -> $BATCH_2_OUT"
echo "[batch_002] Transformed 1000 records"
}
# ... (more batches)
}
echo "All batches processed successfully"
```
## Key Concepts
- **Parallel data processing**: Process multiple batches simultaneously
- **Path construction**: Building input/output file paths
- **Pipeline stages**: Sequential setup, parallel processing, sequential summary

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# Database Backup
> ⚠️ This documentation is AI-generated and may contain errors.
Database backup automation with validation and integrity checks.
## Script
See `/examples/db_backup.rsh` in the repository.
```rush
#!/usr/bin/env rush
DB_NAME = "production_db"
DB_HOST = "db.example.com"
BACKUP_ROOT = "/backups/databases"
BACKUP_PATH = "$BACKUP_ROOT/$DB_NAME"
TIMESTAMP = "2024-01-15-143022"
BACKUP_FILE = "$BACKUP_PATH/backup-$TIMESTAMP.sql.gz"
echo "Database Backup Script"
# Permission check
if not $IS_ROOT {
echo "Warning: Running as $USER (not root)"
echo "Ensure $USER has database access"
}
# Pre-backup validation
for check in connectivity disk_space permissions {
echo " Checking $check..."
if $check {
echo " ✓ $check OK"
}
}
# Backup stages
for stage in dump compress encrypt verify {
STAGE_FILE = "$BACKUP_PATH/$stage.tmp"
echo "[$stage] Processing..."
if $stage {
echo "[$stage] ✓ Complete"
}
}
# Parallel integrity verification
parallel {
run {
echo "[checksum] Computing SHA256..."
echo "[checksum] a1b2c3d4e5f6..."
}
run {
echo "[compression] Verifying gzip integrity..."
echo "[compression] OK"
}
run {
echo "[restore-test] Testing restore on sample..."
echo "[restore-test] Restore successful"
}
}
echo "Backup completed successfully!"
```
## Key Concepts
- **Pre-flight validation**: Check prerequisites before starting
- **Multi-stage processing**: Sequential backup pipeline
- **Parallel verification**: Simultaneously verify different aspects
- **Comprehensive reporting**: Clear status messages throughout

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# System Maintenance
> ⚠️ This documentation is AI-generated and may contain errors.
Example system maintenance script demonstrating permission checks, environment variables, and log rotation.
## Script
See the full script in `/examples/system_maintenance.rsh` in the repository.
```rush
#!/usr/bin/env rush
HOSTNAME = "prod-server-01"
MAX_DISK_USAGE = "85"
LOG_DIR = "/var/log"
BACKUP_DIR = "$HOME/backups"
echo "System Maintenance Script"
echo "Running on: $HOSTNAME"
echo "User: $USER"
# Permission-aware execution
if $IS_ROOT {
echo "Running with root privileges"
for check in disk memory services {
echo "Checking $check status..."
if $check {
echo " ✓ $check is healthy"
}
}
} else {
echo "Running as $USER (limited permissions)"
echo "Some checks may be skipped"
}
# Log rotation planning
echo "Preparing log rotation in $LOG_DIR"
for days in 1 7 30 {
LOG_ARCHIVE = "$BACKUP_DIR/logs-$days-days-old.tar.gz"
echo "Would archive logs older than $days days to $LOG_ARCHIVE"
}
```
## Key Concepts
- **Permission-aware execution**: Different behavior for root vs normal user
- **String interpolation**: Building paths with `$HOME`, `$USER`
- **Loops for maintenance tasks**: Iterating over checks and retention periods

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# Web Deployment
> ⚠️ This documentation is AI-generated and may contain errors.
This example demonstrates a web application deployment pipeline using Rush's parallel execution capabilities.
## Full Script
```rush
#!/usr/bin/env rush
# Web deployment pipeline example
# Shows conditional logic, loops, and parallel execution
APP_NAME = "my-app"
VERSION = "1.2.3"
ENV = "staging"
DEPLOY_DIR = "/var/www/$APP_NAME"
BUILD_DIR = "./dist"
echo "Starting deployment for $APP_NAME v$VERSION to $ENV"
# Check prerequisites
if not $IS_ROOT {
echo "Warning: Not running as root. Some operations may fail."
}
# Build steps
STEPS = "lint test build"
for step in lint test build {
echo "[$step] Running..."
if $step {
# Simulate the build step
echo "[$step] Complete"
}
}
# Deploy in parallel
echo "Deploying to multiple servers..."
parallel {
run {
echo "Server 1: Syncing files to web-1.$ENV.example.com"
echo "Server 1: Deployment complete"
}
run {
echo "Server 2: Syncing files to web-2.$ENV.example.com"
echo "Server 2: Deployment complete"
}
run {
echo "Server 3: Syncing files to web-3.$ENV.example.com"
echo "Server 3: Deployment complete"
}
}
echo "All servers updated with $APP_NAME v$VERSION"
# Post-deployment checks
for server in web-1 web-2 web-3 {
FULL_HOST = "$server.$ENV.example.com"
echo "Health check: $FULL_HOST - OK"
}
echo "Deployment complete!"
```
## Features Demonstrated
### 1. Configuration Variables
The script starts by defining configuration:
```rush
APP_NAME = "my-app"
VERSION = "1.2.3"
ENV = "staging"
DEPLOY_DIR = "/var/www/$APP_NAME"
```
These variables are used throughout the script, making it easy to adapt for different applications.
### 2. Permission Check
```rush
if not $IS_ROOT {
echo "Warning: Not running as root. Some operations may fail."
}
```
The script warns if not running as root, but continues anyway (since deployment might work without root depending on file permissions).
### 3. Sequential Build Steps
```rush
for step in lint test build {
echo "[$step] Running..."
if $step {
echo "[$step] Complete"
}
}
```
Build steps run sequentially since each step depends on the previous one completing successfully.
### 4. Parallel Server Deployment
```rush
parallel {
run {
echo "Server 1: Syncing files to web-1.$ENV.example.com"
echo "Server 1: Deployment complete"
}
run {
echo "Server 2: Syncing files to web-2.$ENV.example.com"
echo "Server 2: Deployment complete"
}
run {
echo "Server 3: Syncing files to web-3.$ENV.example.com"
echo "Server 3: Deployment complete"
}
}
```
Servers are updated in parallel since they're independent. This saves significant time vs deploying sequentially.
### 5. Post-Deployment Verification
```rush
for server in web-1 web-2 web-3 {
FULL_HOST = "$server.$ENV.example.com"
echo "Health check: $FULL_HOST - OK"
}
```
After deployment, verify each server is healthy.
## Example Output
```
Starting deployment for my-app v1.2.3 to staging
Warning: Not running as root. Some operations may fail.
[lint] Running...
[lint] Complete
[test] Running...
[test] Complete
[build] Running...
[build] Complete
Deploying to multiple servers...
Server 1: Syncing files to web-1.staging.example.com
Server 2: Syncing files to web-2.staging.example.com
Server 3: Syncing files to web-3.staging.example.com
Server 1: Deployment complete
Server 2: Deployment complete
Server 3: Deployment complete
All servers updated with my-app v1.2.3
Health check: web-1.staging.example.com - OK
Health check: web-2.staging.example.com - OK
Health check: web-3.staging.example.com - OK
Deployment complete!
```
Note: Output from parallel tasks may be interleaved.
## Adapting for Your Use
To use this for real deployments:
1. **Change configuration variables** to match your app
2. **Replace echo with actual commands** (rsync, scp, etc.)
3. **Add error handling** (check command exit codes)
4. **Customize server list** for your infrastructure
5. **Add real health checks** (curl, wget, etc.)
## Related
- [Parallel Execution](../language/parallel.md) - Learn more about parallel blocks
- [Loops](../language/loops.md) - Sequential iteration patterns
- [Variables](../language/variables.md) - Working with configuration

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# Installation
> ⚠️ This documentation is AI-generated and may contain errors.
## Prerequisites
Rush is written in Rust, so you'll need:
- Rust toolchain (rustc, cargo)
- Git (to clone the repository)
## Installing Rust
If you don't have Rust installed, get it from [rustup.rs](https://rustup.rs/):
```bash
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
```
## Building Rush
1. Clone the repository:
```bash
git clone https://github.com/yourusername/rush.git
cd rush
```
2. Build the project:
```bash
cargo build --release
```
3. The binary will be available at `./target/release/rush`
## Optional: Install System-Wide
To make Rush available system-wide:
```bash
cargo install --path .
```
This installs Rush to `~/.cargo/bin/rush` (make sure `~/.cargo/bin` is in your PATH).
## Verifying Installation
Test your installation:
```bash
./target/release/rush --version
# or if installed system-wide:
rush --version
```
Create a test script `hello.rsh`:
```rush
#!/usr/bin/env rush
NAME = "World"
echo "Hello, $NAME!"
```
Make it executable and run it:
```bash
chmod +x hello.rsh
./target/release/rush hello.rsh
```
You should see: `Hello, World!`
## Next Steps
Now that Rush is installed, proceed to the [Quick Start](./quick-start.md) guide.

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# Quick Start
> ⚠️ This documentation is AI-generated and may contain errors.
This guide will walk you through creating your first Rush script.
## Your First Script
Create a file called `hello.rsh`:
```rush
#!/usr/bin/env rush
# Variables are assigned with =
NAME = "Rush"
echo "Hello from $NAME!"
```
Run it:
```bash
rush hello.rsh
```
Output:
```
Hello from Rush!
```
## Variables and Interpolation
Variables are automatically interpolated in strings:
```rush
PROJECT = "my-app"
VERSION = "1.0.0"
FULL_NAME = "$PROJECT-v$VERSION"
echo "Building $FULL_NAME"
# Output: Building my-app-v1.0.0
```
## Using Built-in Variables
Rush provides several built-in variables:
```rush
echo "Current user: $USER"
echo "Home directory: $HOME"
if $IS_ROOT {
echo "Running as root"
} else {
echo "Running as normal user"
}
```
## Conditional Logic
Use `if`/`else` for branching:
```rush
ENV = "production"
if $ENV {
echo "Environment: $ENV"
}
if not $IS_ROOT {
echo "Warning: Not running as root"
} else {
echo "Running with elevated privileges"
}
```
## Loops
Iterate over items with `for`:
```rush
# Loop over space-separated items
for name in Alice Bob Charlie {
echo "Hello, $name!"
}
# Use variables in loops
SERVERS = "web-1 web-2 web-3"
for server in web-1 web-2 web-3 {
echo "Deploying to $server"
}
```
## Parallel Execution
Run tasks concurrently:
```rush
parallel {
run {
echo "Task 1: Starting..."
echo "Task 1: Complete"
}
run {
echo "Task 2: Starting..."
echo "Task 2: Complete"
}
run {
echo "Task 3: Starting..."
echo "Task 3: Complete"
}
}
echo "All tasks finished"
```
The output from parallel blocks may be interleaved since they run concurrently.
## A Complete Example
Here's a more complete script showing multiple features:
```rush
#!/usr/bin/env rush
# Configuration
PROJECT = "web-app"
ENV = "staging"
DEPLOY_DIR = "/var/www/$PROJECT"
echo "Deployment Script for $PROJECT"
echo "Environment: $ENV"
echo ""
# Pre-flight checks
if not $IS_ROOT {
echo "Warning: Not root. Some operations may fail."
}
# Build steps
echo "Running build steps:"
for step in lint test build {
echo " - $step"
}
# Deploy to multiple servers in parallel
echo ""
echo "Deploying to $ENV servers..."
parallel {
run {
echo "[server-1] Deploying $PROJECT"
echo "[server-1] Complete"
}
run {
echo "[server-2] Deploying $PROJECT"
echo "[server-2] Complete"
}
}
echo ""
echo "Deployment complete!"
```
## Next Steps
Learn more about Rush's features:
- [Variables](../language/variables.md) - Deep dive into variable handling
- [Control Flow](../language/control-flow.md) - Conditionals and branching
- [Loops](../language/loops.md) - Iteration patterns
- [Parallel Execution](../language/parallel.md) - Concurrency in Rush

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# Rush Documentation
Welcome to the Rush programming language documentation!
> ⚠️ **AI-Generated Documentation Notice**
>
> This documentation has been primarily generated by AI and may contain errors, inconsistencies, or incomplete information. Rush is an experimental project and is **not recommended for production use** at this time.
>
> If you find issues or have suggestions, please contribute to improving this documentation.
## What is Rush?
Rush is an experimental shell scripting language that combines:
- **Simple syntax** inspired by modern scripting languages
- **Strict validation** to catch errors at parse time
- **Built-in concurrency** with parallel execution blocks
- **Type-aware variables** with automatic interpolation
- **Control flow** familiar to programmers (if/else, for loops)
## Key Features
### Variable Interpolation
Variables are automatically expanded in strings:
```rush
PROJECT = "my-app"
DIR = "$HOME/projects/$PROJECT"
echo $DIR # Outputs: /home/user/projects/my-app
```
### Parallel Execution
Run tasks concurrently with ease:
```rush
parallel {
run { echo "Task 1" }
run { echo "Task 2" }
run { echo "Task 3" }
}
```
### Strict Validation
Rush validates your scripts before execution:
- Variables must be defined before use
- Syntax errors are caught immediately
- Clear error messages guide you to fixes
### Built-in Variables
Access system information easily:
- `$USER` - Current username
- `$HOME` - Home directory
- `$IS_ROOT` - Whether running as root
## Project Status
Rush is in **early experimental development**. The language design and implementation are subject to change. Current capabilities include:
- ✅ Variable assignment and interpolation
- ✅ Conditional execution (if/else)
- ✅ For loops
- ✅ Parallel execution blocks
- ✅ Basic built-in commands (echo, exit, require_root)
- ⚠️ Limited external command support
- ❌ No package management
- ❌ No module system
- ❌ Limited error handling
## Use Cases
Rush is designed for:
- **Learning** parallel programming concepts
- **Experimenting** with shell script alternatives
- **Prototyping** automation workflows
- **Exploring** strict validation in scripting languages
**Not recommended for:**
- Production systems
- Critical automation
- Enterprise deployments
- Anything requiring stability
## Next Steps
- [Installation](./getting-started/installation.md) - Get Rush set up
- [Quick Start](./getting-started/quick-start.md) - Your first Rush script
- [Language Guide](./language/variables.md) - Learn Rush syntax

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# Built-in Variables
> ⚠️ This documentation is AI-generated and may contain errors.
Rush provides several built-in variables that give you access to system information.
## Available Built-ins
### `$USER`
The current username.
```rush
echo "Running as: $USER"
# Output: Running as: alice
```
**Use cases:**
- Logging who ran a script
- User-specific configuration
- Checking if running as a specific user
```rush
EXPECTED_USER = "deploy"
if not $USER {
echo "ERROR: USER not set"
exit 1
}
echo "Script executed by: $USER"
```
### `$HOME`
The current user's home directory.
```rush
echo "Home directory: $HOME"
# Output: Home directory: /home/alice
```
**Use cases:**
- Building paths to user files
- Configuration file locations
- User-specific data directories
```rush
CONFIG_DIR = "$HOME/.config/myapp"
DATA_DIR = "$HOME/.local/share/myapp"
CACHE_DIR = "$HOME/.cache/myapp"
echo "Configuration: $CONFIG_DIR"
echo "Data: $DATA_DIR"
echo "Cache: $CACHE_DIR"
```
### `$IS_ROOT`
Boolean indicating if the script is running as root (UID 0).
```rush
if $IS_ROOT {
echo "Running with root privileges"
} else {
echo "Running as normal user"
}
```
**Use cases:**
- Permission validation
- Security checks
- Conditional behavior based on privileges
```rush
# Require root for system operations
if not $IS_ROOT {
echo "ERROR: This script must be run as root"
echo "Please run with: sudo rush script.rsh"
exit 1
}
echo "Proceeding with system modifications..."
```
```rush
# Warn but don't fail
if not $IS_ROOT {
echo "WARNING: Not running as root"
echo "Some operations may fail"
}
echo "Continuing anyway..."
```
## Common Patterns
### User-Specific Paths
```rush
PROJECT = "myapp"
CONFIG_FILE = "$HOME/.config/$PROJECT/settings.conf"
LOG_FILE = "$HOME/.local/share/$PROJECT/app.log"
echo "Config: $CONFIG_FILE"
echo "Logs: $LOG_FILE"
```
### Permission Validation
```rush
#!/usr/bin/env rush
# Validate we have the right permissions
if not $IS_ROOT {
echo "This script requires root privileges"
echo "Current user: $USER"
exit 1
}
echo "Running as root - proceeding with installation"
```
### Environment Information
```rush
echo "=== Environment Information ==="
echo "User: $USER"
echo "Home: $HOME"
if $IS_ROOT {
echo "Privileges: root"
} else {
echo "Privileges: normal user"
}
```
### Conditional Behavior
```rush
# Different behavior for root vs normal user
if $IS_ROOT {
INSTALL_DIR = "/opt/myapp"
CONFIG_DIR = "/etc/myapp"
} else {
INSTALL_DIR = "$HOME/.local/share/myapp"
CONFIG_DIR = "$HOME/.config/myapp"
}
echo "Installing to: $INSTALL_DIR"
echo "Config at: $CONFIG_DIR"
```
## Built-in Commands
In addition to variables, Rush provides built-in commands:
### `echo`
Print output to stdout.
```rush
echo "Hello, World!"
echo "Multiple arguments" "are joined" "with spaces"
NAME = "Alice"
echo "Hello, $NAME!"
```
### `exit`
Exit the script with a status code.
```rush
# Exit with success
exit 0
# Exit with error
exit 1
# Exit with custom code
CODE = "42"
exit $CODE
```
**Common pattern:**
```rush
if not $REQUIRED_VAR {
echo "ERROR: REQUIRED_VAR must be set"
exit 1
}
echo "Continuing..."
```
### `require_root`
Built-in helper that ensures the script is running as root, exiting if not.
```rush
# This will exit if not root
require_root
echo "This only runs as root"
```
Equivalent to:
```rush
if not $IS_ROOT {
echo "This script must be run as root"
exit 1
}
```
## Environment Variables
Currently, Rush built-in variables are limited to `$USER`, `$HOME`, and `$IS_ROOT`.
**Not currently supported:**
- ❌ `$PATH` or other environment variables
- ❌ `$PWD` (current working directory)
- ❌ `$SHELL` (user's shell)
- ❌ Custom environment variable access (like `$MY_VAR` from the environment)
### Workaround
For now, if you need other environment variables, you would need to run external commands to get them (if supported).
## Best Practices
1. **Always check built-ins exist** - Validate `$USER` and `$HOME` are set
2. **Validate permissions early** - Check `$IS_ROOT` at script start
3. **Provide clear error messages** - Tell users what went wrong
4. **Document requirements** - Make permission requirements clear in comments
5. **Use meaningful exit codes** - Exit with non-zero on errors
### Example Script Template
```rush
#!/usr/bin/env rush
# Script: system-setup.rsh
# Description: Configure system settings
# Requirements: Must run as root
# Validate environment
if not $USER {
echo "ERROR: USER not set"
exit 1
}
if not $HOME {
echo "ERROR: HOME not set"
exit 1
}
# Check permissions
if not $IS_ROOT {
echo "ERROR: This script must be run as root"
echo "Current user: $USER"
echo "Please run: sudo rush system-setup.rsh"
exit 1
}
# Main script logic
echo "Configuring system as $USER (root)"
# ... rest of script ...
```
## Future Enhancements
Potential additions:
- Access to all environment variables
- `$PWD` for current directory
- `$HOSTNAME` for system name
- `$SHELL` for user's shell
- Function to read environment: `env("VAR_NAME")`
- Process ID: `$PID`
- Parent process ID: `$PPID`
These are not currently implemented.

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# Control Flow
> ⚠️ This documentation is AI-generated and may contain errors.
Rush provides conditional execution through `if`/`else` statements.
## Basic If Statements
The simplest form checks if a variable is defined and non-empty:
```rush
USER_NAME = "Alice"
if $USER_NAME {
echo "Hello, $USER_NAME!"
}
# Output: Hello, Alice!
```
## If-Else
Add an `else` branch for alternative execution:
```rush
ENV = "production"
if $ENV {
echo "Environment: $ENV"
} else {
echo "No environment set"
}
```
## Negation with `not`
Use `not` to check if a variable is empty or undefined:
```rush
if not $IS_ROOT {
echo "Not running as root"
} else {
echo "Running as root"
}
```
## Condition Evaluation
In Rush, conditions are evaluated as follows:
- **Truthy:** Variable exists and has a non-empty value
- **Falsy:** Variable is empty or undefined
```rush
EMPTY = ""
FILLED = "data"
if $FILLED {
echo "This runs" # ✅ Runs
}
if $EMPTY {
echo "This doesn't run" # ❌ Skipped
}
if not $EMPTY {
echo "Empty variable detected" # ✅ Runs
}
```
## Common Patterns
### Permission Checks
```rush
if not $IS_ROOT {
echo "Warning: This script should be run as root"
exit 1
}
echo "Proceeding with root privileges..."
```
### Environment Validation
```rush
REQUIRED_VAR = "" # Simulating an undefined/empty variable
if not $REQUIRED_VAR {
echo "ERROR: REQUIRED_VAR must be set"
exit 1
}
echo "Configuration valid"
```
### Feature Flags
```rush
DEBUG_MODE = "true"
if $DEBUG_MODE {
echo "Debug mode enabled"
echo "Verbose logging active"
}
```
### Multi-Step Validation
```rush
CONFIG_FILE = "/etc/myapp/config.conf"
DATA_DIR = "/var/lib/myapp"
if $CONFIG_FILE {
echo "Config: $CONFIG_FILE"
if $DATA_DIR {
echo "Data directory: $DATA_DIR"
echo "All paths configured"
} else {
echo "ERROR: Data directory not set"
}
} else {
echo "ERROR: Config file not set"
}
```
## Nested Conditions
You can nest `if` statements:
```rush
ENV = "production"
BACKUP_ENABLED = "yes"
if $ENV {
echo "Environment: $ENV"
if $BACKUP_ENABLED {
echo "Backups are enabled"
} else {
echo "Warning: Backups disabled"
}
}
```
## Limitations
Current limitations of Rush conditionals:
- ❌ No `elif` or `else if` (use nested `if` instead)
- ❌ No comparison operators (`==`, `!=`, `<`, `>`)
- ❌ No logical operators (`&&`, `||`) beyond `not`
- ❌ No string matching or regex
- ❌ No numeric comparisons
- ❌ Can only test variable truthiness
### Workaround Example
Since there's no `elif`, use nested conditions:
```rush
MODE = "production"
if $MODE {
# Check what MODE actually is would require comparison operators
# For now, any non-empty value is truthy
echo "Mode is set to: $MODE"
} else {
echo "Mode not set, using default"
}
```
## Best Practices
1. **Keep conditions simple** - Rush conditionals are basic, so keep logic straightforward
2. **Use descriptive variable names** - Make intent clear since you can't use complex expressions
3. **Validate early** - Check required conditions at the start of your script
4. **Provide clear messages** - Echo helpful information in each branch
5. **Use exit codes** - Exit with non-zero status on errors
### Example: Script Validation
```rush
#!/usr/bin/env rush
# Validate environment
if not $USER {
echo "ERROR: USER not set"
exit 1
}
if not $HOME {
echo "ERROR: HOME not set"
exit 1
}
# Proceed with script
echo "Environment validated for $USER"
echo "Home directory: $HOME"
# Execute main logic here...
```
## Future Improvements
Potential future enhancements to control flow:
- `elif` for multi-way branching
- Comparison operators for string/numeric comparison
- Logical operators for combining conditions
- Pattern matching
- Case/switch statements
These are not currently implemented.

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# Loops
> ⚠️ This documentation is AI-generated and may contain errors.
Rush supports iteration through `for` loops.
## Basic For Loop
Loop over a space-separated list of items:
```rush
for name in Alice Bob Charlie {
echo "Hello, $name!"
}
```
Output:
```
Hello, Alice!
Hello, Bob!
Hello, Charlie!
```
## Loop Variable
The loop variable takes on each value in sequence:
```rush
for number in 1 2 3 4 5 {
echo "Number: $number"
}
```
Output:
```
Number: 1
Number: 2
Number: 3
Number: 4
Number: 5
```
## Iterating Over Configuration
Common pattern for processing multiple items:
```rush
SERVERS = "web-1 web-2 web-3"
for server in web-1 web-2 web-3 {
echo "Deploying to $server"
# Deployment commands here
}
```
## Using Variables in Loops
You can use variables within the loop body:
```rush
ENV = "production"
BASE_URL = "https://api.example.com"
for endpoint in users posts comments {
URL = "$BASE_URL/$endpoint"
echo "Checking $URL in $ENV"
}
```
## Nested Loops
Loops can be nested for multi-dimensional iteration:
```rush
for env in dev staging prod {
echo "Environment: $env"
for server in web-1 web-2 {
HOSTNAME = "$server.$env.example.com"
echo " - $HOSTNAME"
}
}
```
Output:
```
Environment: dev
- web-1.dev.example.com
- web-2.dev.example.com
Environment: staging
- web-1.staging.example.com
- web-2.staging.example.com
Environment: prod
- web-1.prod.example.com
- web-2.prod.example.com
```
## Conditionals in Loops
Combine loops with `if` statements:
```rush
for item in file1 file2 file3 {
if $item {
echo "Processing $item"
# Process the file
} else {
echo "Skipping empty item"
}
}
```
## Common Patterns
### Processing Files
```rush
for file in config.yml database.yml secrets.yml {
FILE_PATH = "/etc/app/$file"
echo "Loading $FILE_PATH"
}
```
### Multi-Stage Pipeline
```rush
echo "Build Pipeline"
for stage in fetch compile test package deploy {
echo "[$stage] Starting..."
# Stage-specific logic here
echo "[$stage] Complete"
}
```
### Server Configuration
```rush
APP = "myapp"
for region in us-east us-west eu-west {
SERVER = "$APP-$region"
echo "Configuring $SERVER"
}
```
### Cleanup Tasks
```rush
TEMP_DIR = "/tmp/build"
for artifact in logs cache temp build {
ARTIFACT_PATH = "$TEMP_DIR/$artifact"
echo "Removing $ARTIFACT_PATH"
}
```
## Loop Variable Scope
Loop variables persist after the loop ends with their last value:
```rush
for item in a b c {
echo "Current: $item"
}
echo "Last item was: $item"
# Output: Last item was: c
```
This may change in future versions to limit scope to the loop body.
## Limitations
Current limitations of Rush loops:
- ❌ Only `for` loops (no `while` or `until`)
- ❌ No `break` or `continue` statements
- ❌ No range syntax (like `1..10`)
- ❌ Cannot iterate over arrays (Rush has no arrays)
- ❌ Cannot iterate over command output (like `for i in $(ls)`)
- ❌ No C-style `for(i=0; i<10; i++)` syntax
- ❌ Loop items must be explicitly listed
### Workarounds
Since you can't iterate over command output, you need to explicitly list items:
```rush
# ❌ Not supported (yet):
# for file in $(ls *.txt) { ... }
# ✅ Instead, list explicitly:
for file in file1.txt file2.txt file3.txt {
echo "Processing $file"
}
```
## Best Practices
1. **Use descriptive loop variables** - `for server in ...` is clearer than `for i in ...`
2. **Keep loop bodies simple** - Complex logic should be broken down
3. **Document what you're iterating** - Add comments for clarity
4. **Consider parallel execution** - If iterations are independent, use `parallel` blocks
### Good Example
```rush
#!/usr/bin/env rush
# Deploy to multiple environments
echo "Starting deployment"
for env in dev staging production {
echo ""
echo "=== Deploying to $env ==="
DEPLOY_URL = "https://deploy.$env.example.com"
echo "Target: $DEPLOY_URL"
# Deployment steps
for step in backup deploy verify {
echo " [$step] Running..."
}
echo "=== $env deployment complete ==="
}
echo ""
echo "All deployments finished"
```
## Combining with Parallel Execution
For independent iterations, consider using parallel blocks instead:
```rush
# Sequential (slow)
for server in web-1 web-2 web-3 {
echo "Deploying to $server"
}
# Parallel (fast)
parallel {
run { echo "Deploying to web-1" }
run { echo "Deploying to web-2" }
run { echo "Deploying to web-3" }
}
```
See [Parallel Execution](./parallel.md) for more details.
## Future Improvements
Potential enhancements:
- `while` and `until` loops
- `break` and `continue` statements
- Range syntax: `for i in 1..10`
- Iterating over command output
- Array iteration
- Step values: `for i in 1..10 step 2`
These are not currently implemented.

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@@ -0,0 +1,331 @@
# Parallel Execution
> ⚠️ This documentation is AI-generated and may contain errors.
One of Rush's key features is built-in support for parallel execution through `parallel` blocks.
## Basic Parallel Block
Run multiple tasks concurrently:
```rush
parallel {
run {
echo "Task 1"
}
run {
echo "Task 2"
}
run {
echo "Task 3"
}
}
```
The tasks run simultaneously, so output may be interleaved:
```
Task 1
Task 3
Task 2
```
## When to Use Parallel Execution
Use parallel blocks when:
- ✅ Tasks are **independent** (don't depend on each other)
- ✅ Tasks are **I/O bound** (network, disk operations)
- ✅ You want to **save time** by running concurrently
- ✅ Order of completion doesn't matter
Don't use parallel blocks when:
- ❌ Tasks must run in **specific order**
- ❌ Tasks **share state** or modify the same resources
- ❌ Tasks are **CPU intensive** and would compete for resources
- ❌ You need **deterministic output** order
## Practical Examples
### Deploying to Multiple Servers
```rush
APP = "my-service"
VERSION = "1.2.3"
echo "Deploying $APP v$VERSION to all servers..."
parallel {
run {
echo "[web-1] Starting deployment"
echo "[web-1] Deployment complete"
}
run {
echo "[web-2] Starting deployment"
echo "[web-2] Deployment complete"
}
run {
echo "[web-3] Starting deployment"
echo "[web-3] Deployment complete"
}
}
echo "All servers updated!"
```
### Running Multiple Tests
```rush
echo "Running test suite in parallel..."
parallel {
run {
echo "[unit-tests] Running..."
echo "[unit-tests] 127 tests passed"
}
run {
echo "[integration-tests] Running..."
echo "[integration-tests] 45 tests passed"
}
run {
echo "[lint] Running..."
echo "[lint] No issues found"
}
}
echo "All tests complete!"
```
### Data Processing Batches
```rush
DATA_DIR = "$HOME/data"
echo "Processing data batches..."
parallel {
run {
INPUT = "$DATA_DIR/batch_001.csv"
echo "[batch-001] Processing $INPUT"
echo "[batch-001] Complete"
}
run {
INPUT = "$DATA_DIR/batch_002.csv"
echo "[batch-002] Processing $INPUT"
echo "[batch-002] Complete"
}
run {
INPUT = "$DATA_DIR/batch_003.csv"
echo "[batch-003] Processing $INPUT"
echo "[batch-003] Complete"
}
}
echo "All batches processed!"
```
### Health Checks
```rush
echo "Checking service health..."
parallel {
run {
echo "[database] Checking connection..."
echo "[database] OK"
}
run {
echo "[cache] Checking Redis..."
echo "[cache] OK"
}
run {
echo "[api] Checking endpoint..."
echo "[api] OK"
}
}
echo "All services healthy"
```
## Variable Access
Variables defined before the `parallel` block are accessible inside:
```rush
PROJECT = "my-app"
ENV = "production"
parallel {
run {
echo "Deploying $PROJECT to server-1 ($ENV)"
}
run {
echo "Deploying $PROJECT to server-2 ($ENV)"
}
}
```
## Limitations
Current limitations of parallel execution in Rush:
- ❌ **Cannot define variables** inside `run` blocks
- ❌ **No synchronization** primitives (no locks, semaphores)
- ❌ **No return values** from parallel blocks
- ❌ **No error propagation** (if one task fails, others continue)
- ❌ **Fixed worker thread count** (currently hardcoded to 4)
- ❌ **No task dependencies** (can't say "run A, then B and C in parallel")
- ❌ **Output interleaving** (output from tasks mixed randomly)
### Variable Limitation Example
```rush
# ❌ This doesn't work:
parallel {
run {
MY_VAR = "value" # ERROR: Can't define variables in run blocks
echo $MY_VAR
}
}
# ✅ Define variables before the parallel block:
MY_VAR = "value"
parallel {
run {
echo $MY_VAR # OK: Can read existing variables
}
}
```
## Performance Considerations
### Thread Pool
Rush currently uses a fixed pool of 4 worker threads. This means:
- If you have 4 tasks, they all run simultaneously
- If you have 10 tasks, 4 run at a time, then the next 4, then the final 2
```rush
# All run simultaneously (4 tasks, 4 threads)
parallel {
run { echo "A" }
run { echo "B" }
run { echo "C" }
run { echo "D" }
}
# Runs in batches (8 tasks, 4 threads)
parallel {
run { echo "1" } # First batch
run { echo "2" } # First batch
run { echo "3" } # First batch
run { echo "4" } # First batch
run { echo "5" } # Second batch (waits)
run { echo "6" } # Second batch (waits)
run { echo "7" } # Second batch (waits)
run { echo "8" } # Second batch (waits)
}
```
### I/O vs CPU Bound
Parallel execution works best for I/O-bound tasks:
```rush
# ✅ Good use case (I/O bound)
parallel {
run { echo "Downloading file 1..." }
run { echo "Downloading file 2..." }
run { echo "Downloading file 3..." }
}
# ⚠️ May not help much (CPU bound)
parallel {
run { echo "Computing hash 1..." }
run { echo "Computing hash 2..." }
run { echo "Computing hash 3..." }
}
```
## Combining Parallel with Loops
You can't directly parallelize a loop, but you can manually write parallel tasks:
```rush
# ❌ Can't do this (loop over parallel tasks):
# for server in web-1 web-2 web-3 {
# run { echo "Deploy to $server" }
# }
# ✅ Instead, write out each task:
parallel {
run { echo "Deploy to web-1" }
run { echo "Deploy to web-2" }
run { echo "Deploy to web-3" }
}
```
## Best Practices
1. **Keep run blocks simple** - Complex logic is harder to debug when parallel
2. **Prefix output** - Use `[task-name]` prefixes to identify which task is logging
3. **Make tasks independent** - Don't rely on order of execution
4. **Use for I/O operations** - Network requests, file operations, database queries
5. **Avoid shared state** - Don't modify the same resources from multiple tasks
### Good Example
```rush
#!/usr/bin/env rush
BUILD_ID = "12345"
REGISTRY = "registry.example.com"
echo "Starting parallel build verification"
parallel {
run {
echo "[checksums] Computing artifact checksums..."
echo "[checksums] SHA256: abc123def456"
}
run {
echo "[docker] Verifying container image..."
echo "[docker] Image $REGISTRY/app:$BUILD_ID verified"
}
run {
echo "[tests] Running smoke tests..."
echo "[tests] All smoke tests passed"
}
}
echo "Verification complete for build $BUILD_ID"
```
## Future Improvements
Potential enhancements:
- Configurable worker thread count
- Error handling and propagation
- Waiting for specific tasks
- Task dependencies (DAG execution)
- Return values from parallel tasks
- Synchronized output (prevent interleaving)
- Progress indicators
These are not currently implemented.

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@@ -0,0 +1,188 @@
# Variables
> ⚠️ This documentation is AI-generated and may contain errors.
Variables in Rush are simple to use and automatically interpolated in strings.
## Declaration and Assignment
Variables are declared and assigned using the `=` operator:
```rush
NAME = "Alice"
AGE = "30"
CITY = "San Francisco"
```
**Note:** Currently, all values are treated as strings in Rush.
## Variable Naming Rules
Variable names:
- Must start with a letter or underscore
- Can contain letters, numbers, and underscores
- Are case-sensitive
- Should be in UPPER_CASE by convention (though not required)
```rush
valid_name = "yes"
ALSO_VALID = "yes"
name123 = "yes"
_private = "yes"
# Invalid (will cause parse errors):
# 123invalid = "no" # Can't start with number
# my-var = "no" # Hyphens not allowed
```
## String Interpolation
Variables are automatically interpolated when prefixed with `$`:
```rush
USER_NAME = "Alice"
GREETING = "Hello, $USER_NAME!"
echo $GREETING
# Output: Hello, Alice!
```
### Nested Interpolation
Variables can reference other variables:
```rush
PROJECT = "my-app"
VERSION = "2.1.0"
ARTIFACT = "$PROJECT-$VERSION.tar.gz"
echo $ARTIFACT
# Output: my-app-2.1.0.tar.gz
```
### Path Construction
Common pattern for building paths:
```rush
BASE_DIR = "$HOME/projects"
PROJECT_NAME = "rush"
PROJECT_DIR = "$BASE_DIR/$PROJECT_NAME"
echo $PROJECT_DIR
# Output: /home/user/projects/rush
```
## Validation and Errors
Rush validates variable usage at parse time:
```rush
# ❌ ERROR: Variable used before definition
echo $UNDEFINED_VAR
MESSAGE = "Hello"
# ✅ CORRECT: Define before use
MESSAGE = "Hello"
echo $MESSAGE
```
This strict validation helps catch typos and undefined variable references early.
## Variable Scope
### Global Scope
Variables defined at the top level are available throughout the script:
```rush
GLOBAL_VAR = "accessible everywhere"
if $GLOBAL_VAR {
echo $GLOBAL_VAR # ✅ Works
}
for item in a b c {
echo $GLOBAL_VAR # ✅ Works
}
```
### Loop Variables
Loop variables are scoped to the loop body:
```rush
for item in x y z {
# 'item' is available here
echo "Processing $item"
}
# 'item' retains its last value after the loop
echo "Last item was: $item"
```
**Note:** Currently, Rush has simple scoping rules. Variables defined in loops persist after the loop exits with their last assigned value.
## Built-in Variables
Rush provides several built-in variables (see [Built-in Variables](./builtins.md) for details):
```rush
echo "User: $USER"
echo "Home: $HOME"
if $IS_ROOT {
echo "Running as root"
}
```
## Escaping Variables
Currently, Rush does not support escaping `$` to print it literally. If you need a literal `$`, you may need to work around this limitation.
```rush
# This will attempt variable interpolation:
echo "Price: $100" # Looks for variable named "100"
```
## Best Practices
1. **Define variables at the top** of your script for clarity
2. **Use descriptive names** that indicate purpose
3. **Group related variables** together
4. **Use UPPER_CASE** for constants/configuration
5. **Validate inputs** early in your script
### Example
```rush
#!/usr/bin/env rush
# Configuration
APP_NAME = "my-service"
APP_VERSION = "1.0.0"
DEPLOY_ENV = "production"
# Paths
BASE_DIR = "/opt/apps"
APP_DIR = "$BASE_DIR/$APP_NAME"
LOG_DIR = "/var/log/$APP_NAME"
# Deployment
ARTIFACT = "$APP_NAME-$APP_VERSION.tar.gz"
ARTIFACT_URL = "https://releases.example.com/$ARTIFACT"
echo "Deploying $ARTIFACT to $DEPLOY_ENV"
```
## Limitations
Current limitations of Rush variables:
- ❌ No arrays or lists
- ❌ No numeric operations
- ❌ No string manipulation functions
- ❌ No variable expansion modifiers (like `${var:-default}`)
- ❌ All values are strings
- ❌ No explicit quoting mechanism
These limitations may be addressed in future versions of Rush.

249
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View File

@@ -16,28 +16,22 @@ impl<'a> Executor<'a> {
match node { match node {
AstNode::VariableAssignment { name, value } => { AstNode::VariableAssignment { name, value } => {
if let AstNode::Literal(val) = *value { if let AstNode::Literal(val) = *value {
self.env.set_variable(name, val); let substituted = self.substitute_variables(&val);
self.env.set_variable(name, substituted);
} }
} }
AstNode::Command { name, args } => { AstNode::Command { name, args } => {
// convert args to strings
let arg_strings: Vec<String> = args let arg_strings: Vec<String> = args
.into_iter() .into_iter()
.filter_map(|arg| { .filter_map(|arg| {
if let AstNode::Literal(s) = arg { if let AstNode::Literal(s) = arg {
// Check if its a variable reference Some(self.substitute_variables(&s))
if s.starts_with('$') {
self.env.get_variable(&s[1..]).map(|v| v.clone())
} else {
Some(s)
}
} else { } else {
None None
} }
}) })
.collect(); .collect();
// built in commands :D
//todo: move and add more builtins //todo: move and add more builtins
if name == "echo" { if name == "echo" {
builtins::echo(arg_strings); builtins::echo(arg_strings);
@@ -50,7 +44,6 @@ impl<'a> Executor<'a> {
} else if name == "require_root" { } else if name == "require_root" {
builtins::require_root(); builtins::require_root();
} else { } else {
// execute external cmd
let cmd = Command { let cmd = Command {
name: name.clone(), name: name.clone(),
args: arg_strings, args: arg_strings,
@@ -59,34 +52,32 @@ impl<'a> Executor<'a> {
} }
} }
AstNode::ControlFlow { AstNode::ControlFlow {
condition: _, condition,
then_branch, then_branch,
else_branch, else_branch,
} => { } => {
println!("TODO: Execute if statement"); let condition_result = self.evaluate_condition(&condition);
for node in then_branch {
self.execute_node(node); if condition_result {
} for node in then_branch {
if let Some(else_nodes) = else_branch { self.execute_node(node);
}
} else if let Some(else_nodes) = else_branch {
for node in else_nodes { for node in else_nodes {
self.execute_node(node); self.execute_node(node);
} }
} }
} }
AstNode::For { var, items, body } => { AstNode::For { var, items, body } => {
// execute for loop by iterating over items
for item in items { for item in items {
// set loop variable
self.env.set_variable(var.clone(), item); self.env.set_variable(var.clone(), item);
// Execute body
for node in &body { for node in &body {
self.execute_node(node.clone()); self.execute_node(node.clone());
} }
} }
} }
AstNode::Parallel { blocks } => { AstNode::Parallel { blocks } => {
// create multithreaded runtime
let runtime = tokio::runtime::Builder::new_multi_thread() let runtime = tokio::runtime::Builder::new_multi_thread()
.worker_threads(4) //todo: make configurable or dynamic .worker_threads(4) //todo: make configurable or dynamic
.enable_all() .enable_all()
@@ -96,24 +87,16 @@ impl<'a> Executor<'a> {
runtime.block_on(async { runtime.block_on(async {
let mut handles = vec![]; let mut handles = vec![];
for block in blocks { for block in blocks {
// clone the environment for this block to access variables
let env = self.env.clone(); let env = self.env.clone();
// Spawn each block as a separate task (can run on different threads)
let handle = tokio::task::spawn_blocking(move || { let handle = tokio::task::spawn_blocking(move || {
for node in block { for node in block {
// Execute node
if let AstNode::Command { name, args } = node { if let AstNode::Command { name, args } = node {
let arg_strings: Vec<String> = args let arg_strings: Vec<String> = args
.into_iter() .into_iter()
.filter_map(|arg| { .filter_map(|arg| {
if let AstNode::Literal(s) = arg { if let AstNode::Literal(s) = arg {
// Check if its a variable reference Some(env.substitute_variables(&s))
if s.starts_with('$') {
env.get_variable(&s[1..]).map(|v| v.clone())
} else {
Some(s)
}
} else { } else {
None None
} }
@@ -123,7 +106,6 @@ impl<'a> Executor<'a> {
if name == "echo" { if name == "echo" {
println!("{}", arg_strings.join(" ")); println!("{}", arg_strings.join(" "));
} else { } else {
// execute external cmd
match std::process::Command::new(&name) match std::process::Command::new(&name)
.args(&arg_strings) .args(&arg_strings)
.output() .output()
@@ -153,16 +135,14 @@ impl<'a> Executor<'a> {
handles.push(handle); handles.push(handle);
} }
// wait for all
for handle in handles { for handle in handles {
let _ = handle.await; let _ = handle.await;
} }
}); });
} }
AstNode::Workers { count, body } => { AstNode::Workers { count, body } => {
// execute with limited concurrency using a semaphore and multi-threaded runtime
let rt = tokio::runtime::Builder::new_multi_thread() let rt = tokio::runtime::Builder::new_multi_thread()
.worker_threads(count.max(2)) // use at least 2 threads, or the worker count .worker_threads(count.max(2))
.enable_all() .enable_all()
.build() .build()
.unwrap(); .unwrap();
@@ -171,7 +151,6 @@ impl<'a> Executor<'a> {
use std::sync::Arc; use std::sync::Arc;
use tokio::sync::Semaphore; use tokio::sync::Semaphore;
// clone environment for workers
let env = self.env.clone(); let env = self.env.clone();
let semaphore = Arc::new(Semaphore::new(count)); let semaphore = Arc::new(Semaphore::new(count));
@@ -181,31 +160,19 @@ impl<'a> Executor<'a> {
let sem = semaphore.clone(); let sem = semaphore.clone();
let env_clone = env.clone(); let env_clone = env.clone();
// clone the node for the async task
let node_clone = node.clone(); let node_clone = node.clone();
// Use spawn_blocking for CPU bound work to run on thread pool
let handle = tokio::task::spawn_blocking(move || { let handle = tokio::task::spawn_blocking(move || {
// Acquire semaphore permit (limits concurrency)
// Note: We need to do this in a blocking context
let rt_inner = tokio::runtime::Handle::current(); let rt_inner = tokio::runtime::Handle::current();
let _permit = rt_inner.block_on(async { sem.acquire().await.unwrap() }); let _permit = rt_inner.block_on(async { sem.acquire().await.unwrap() });
// execute the node based on its type
match node_clone { match node_clone {
AstNode::Command { name, args } => { AstNode::Command { name, args } => {
let arg_strings: Vec<String> = args let arg_strings: Vec<String> = args
.into_iter() .into_iter()
.filter_map(|arg| { .filter_map(|arg| {
if let AstNode::Literal(s) = arg { if let AstNode::Literal(s) = arg {
// Check if it's a variable reference Some(env_clone.substitute_variables(&s))
if s.starts_with('$') {
env_clone
.get_variable(&s[1..])
.map(|v| v.clone())
} else {
Some(s)
}
} else { } else {
None None
} }
@@ -244,30 +211,94 @@ impl<'a> Executor<'a> {
items, items,
body: for_body, body: for_body,
} => { } => {
// execute for loop
for item in items { for item in items {
for for_node in &for_body { for for_node in &for_body {
// simple execution for commands in for loops match for_node {
if let AstNode::Command { name, args } = for_node { AstNode::Command { name, args } => {
let arg_strings: Vec<String> = args
.iter()
.filter_map(|arg| {
if let AstNode::Literal(s) = arg {
let mut temp_env = env_clone.clone();
temp_env.set_variable(
var.clone(),
item.clone(),
);
Some(temp_env.substitute_variables(s))
} else {
None
}
})
.collect();
if name == "echo" {
println!("{}", arg_strings.join(" "));
}
}
AstNode::Parallel { blocks } => {
for block in blocks {
for cmd_node in block {
if let AstNode::Command { name, args } = cmd_node {
let arg_strings: Vec<String> = args
.iter()
.filter_map(|arg| {
if let AstNode::Literal(s) = arg {
let mut temp_env = env_clone.clone();
temp_env.set_variable(
var.clone(),
item.clone(),
);
Some(temp_env.substitute_variables(s))
} else {
None
}
})
.collect();
if name == "echo" {
println!("{}", arg_strings.join(" "));
} else {
match std::process::Command::new(name)
.args(&arg_strings)
.output()
{
Ok(output) => {
if !output.stdout.is_empty() {
print!(
"{}",
String::from_utf8_lossy(&output.stdout)
);
}
if !output.stderr.is_empty() {
eprint!(
"{}",
String::from_utf8_lossy(&output.stderr)
);
}
}
Err(e) => {
eprintln!("Failed to execute '{}': {}", name, e);
}
}
}
}
}
}
}
_ => {}
}
}
}
}
AstNode::Parallel { blocks } => {
for block in blocks {
for cmd_node in block {
if let AstNode::Command { name, args } = cmd_node {
let arg_strings: Vec<String> = args let arg_strings: Vec<String> = args
.iter() .into_iter()
.filter_map(|arg| { .filter_map(|arg| {
if let AstNode::Literal(s) = arg { if let AstNode::Literal(s) = arg {
Some(env_clone.substitute_variables(&s))
if s.starts_with('$') {
let var_name = &s[1..];
if var_name == var {
// loop var
Some(item.clone())
} else {
// Environment var
env_clone
.get_variable(var_name)
.map(|v| v.clone())
}
} else {
Some(s.clone())
}
} else { } else {
None None
} }
@@ -276,6 +307,29 @@ impl<'a> Executor<'a> {
if name == "echo" { if name == "echo" {
println!("{}", arg_strings.join(" ")); println!("{}", arg_strings.join(" "));
} else {
match std::process::Command::new(&name)
.args(&arg_strings)
.output()
{
Ok(output) => {
if !output.stdout.is_empty() {
print!(
"{}",
String::from_utf8_lossy(&output.stdout)
);
}
if !output.stderr.is_empty() {
eprint!(
"{}",
String::from_utf8_lossy(&output.stderr)
);
}
}
Err(e) => {
eprintln!("Failed to execute '{}': {}", name, e);
}
}
} }
} }
} }
@@ -283,22 +337,18 @@ impl<'a> Executor<'a> {
} }
_ => { _ => {
//todo: other node types not yet supported in workers //todo: other node types not yet supported in workers
} }
} }
}); });
handles.push(handle); handles.push(handle);
} }
// wait for all tasks to complete
for handle in handles { for handle in handles {
let _ = handle.await; let _ = handle.await;
} }
}); });
} }
AstNode::Literal(_) => { AstNode::Literal(_) => {}
// literals dont execute on their own
}
} }
} }
@@ -313,9 +363,7 @@ impl<'a> Executor<'a> {
var, var,
items.len() items.len()
); );
for _stmt in body { for _stmt in body {}
// execute each statement in the loop body
}
} }
Statement::If { Statement::If {
condition, condition,
@@ -324,13 +372,9 @@ impl<'a> Executor<'a> {
} => { } => {
// todo: Implement if statement execution // todo: Implement if statement execution
println!("todo: Execute if with condition '{}'", condition); println!("todo: Execute if with condition '{}'", condition);
for _stmt in then_branch { for _stmt in then_branch {}
// Execute then branch
}
if let Some(else_stmts) = else_branch { if let Some(else_stmts) = else_branch {
for _stmt in else_stmts { for _stmt in else_stmts {}
// Execute else branch
}
} }
} }
Statement::Parallel { blocks } => { Statement::Parallel { blocks } => {
@@ -364,4 +408,49 @@ impl<'a> Executor<'a> {
} }
} }
} }
fn evaluate_condition(&self, condition: &AstNode) -> bool {
match condition {
AstNode::Literal(s) => {
let s = s.trim();
let (negated, condition_str) = if s.starts_with("not ") {
(true, s[4..].trim())
} else {
(false, s)
};
let result = if condition_str.starts_with('$') {
let var_name = &condition_str[1..];
if let Some(value) = self.env.get_variable(var_name) {
self.is_truthy(value)
} else {
false
}
} else {
self.is_truthy(condition_str)
};
if negated {
!result
} else {
result
}
}
_ => false,
}
}
fn is_truthy(&self, value: &str) -> bool {
// Empty string, "0", "false", "no" are falsy
// Everything else is truthy
!value.is_empty()
&& value != "0"
&& value.to_lowercase() != "false"
&& value.to_lowercase() != "no"
}
fn substitute_variables(&self, s: &str) -> String {
self.env.substitute_variables(s)
}
} }

6
src/interpreter/mod.rs
View File

@@ -5,12 +5,9 @@ use crate::parser::Parser;
use crate::runtime::environment::Environment; use crate::runtime::environment::Environment;
use executor::Executor; use executor::Executor;
/// Main entry point for executing rush scripts
pub fn execute(content: &str) { pub fn execute(content: &str) {
// create a new parser
let parser = Parser::new(); let parser = Parser::new();
// parse the script content
let program = match parser.parse(content) { let program = match parser.parse(content) {
Ok(prog) => prog, Ok(prog) => prog,
Err(e) => { Err(e) => {
@@ -19,13 +16,10 @@ pub fn execute(content: &str) {
} }
}; };
// create a new environment
let mut env = Environment::new(); let mut env = Environment::new();
// create an executor
let mut executor = Executor::new(&mut env); let mut executor = Executor::new(&mut env);
// execute each statement in the program
for statement in program.statements { for statement in program.statements {
executor.execute_node(statement); executor.execute_node(statement);
} }

11
src/main.rs
View File

@@ -8,7 +8,16 @@ fn main() {
let script_path = &args[1]; let script_path = &args[1];
let content = std::fs::read_to_string(script_path).expect("Failed to read the script file"); let content = std::fs::read_to_string(script_path);
if content.is_err() {
eprintln!(
"Error reading file {}: {}",
script_path,
content.err().unwrap()
);
std::process::exit(1);
}
let content = content.unwrap();
let stripped_content = if content.starts_with("#!") { let stripped_content = if content.starts_with("#!") {
content.lines().skip(1).collect::<Vec<&str>>().join("\n") content.lines().skip(1).collect::<Vec<&str>>().join("\n")

415
src/parser/mod.rs
View File

@@ -41,6 +41,15 @@ impl Parser {
let mut defined_vars: HashSet<String> = HashSet::new(); let mut defined_vars: HashSet<String> = HashSet::new();
// built in variables that are always available
defined_vars.insert("IS_ROOT".to_string());
defined_vars.insert("USER".to_string());
defined_vars.insert("HOME".to_string());
defined_vars.insert("SHELL".to_string());
defined_vars.insert("PWD".to_string());
defined_vars.insert("OS".to_string());
defined_vars.insert("ARCH".to_string());
for statement in &program.statements { for statement in &program.statements {
self.validate_node(statement, &mut defined_vars)?; self.validate_node(statement, &mut defined_vars)?;
} }
@@ -55,13 +64,10 @@ impl Parser {
) -> Result<(), RushError> { ) -> Result<(), RushError> {
match node { match node {
AstNode::VariableAssignment { name, value } => { AstNode::VariableAssignment { name, value } => {
// first check if the value uses any undefined variables
self.check_node_for_undefined_vars(value, defined_vars)?; self.check_node_for_undefined_vars(value, defined_vars)?;
// then add this variable to the defined set
defined_vars.insert(name.clone()); defined_vars.insert(name.clone());
} }
AstNode::Command { name: _, args } => { AstNode::Command { name: _, args } => {
// check all arguments for variable references
for arg in args { for arg in args {
self.check_node_for_undefined_vars(arg, defined_vars)?; self.check_node_for_undefined_vars(arg, defined_vars)?;
} }
@@ -71,17 +77,14 @@ impl Parser {
items: _, items: _,
body, body,
} => { } => {
// create a new scope for the for loop variable
let mut loop_scope = defined_vars.clone(); let mut loop_scope = defined_vars.clone();
loop_scope.insert(var.clone()); loop_scope.insert(var.clone());
// validate the body with the loop variable in scope
for body_node in body { for body_node in body {
self.validate_node(body_node, &mut loop_scope)?; self.validate_node(body_node, &mut loop_scope)?;
} }
} }
AstNode::Parallel { blocks } => { AstNode::Parallel { blocks } => {
// each parallel block sees the current scope but can't define new vars
for block in blocks { for block in blocks {
for block_node in block { for block_node in block {
let mut parallel_scope = defined_vars.clone(); let mut parallel_scope = defined_vars.clone();
@@ -90,7 +93,6 @@ impl Parser {
} }
} }
AstNode::Workers { count: _, body } => { AstNode::Workers { count: _, body } => {
// workers blocks see the current scope
for worker_node in body { for worker_node in body {
let mut worker_scope = defined_vars.clone(); let mut worker_scope = defined_vars.clone();
self.validate_node(worker_node, &mut worker_scope)?; self.validate_node(worker_node, &mut worker_scope)?;
@@ -125,10 +127,8 @@ impl Parser {
) -> Result<(), RushError> { ) -> Result<(), RushError> {
match node { match node {
AstNode::Literal(s) => { AstNode::Literal(s) => {
// check if this is a variable reference for var_name in self.extract_variables(s) {
if s.starts_with('$') { if !defined_vars.contains(&var_name) {
let var_name = &s[1..];
if !defined_vars.contains(var_name) {
return Err(RushError::VariableError(format!( return Err(RushError::VariableError(format!(
"Variable '{}' is used before being defined", "Variable '{}' is used before being defined",
var_name var_name
@@ -151,20 +151,123 @@ impl Parser {
Ok(()) Ok(())
} }
fn extract_variables(&self, s: &str) -> Vec<String> {
let mut vars = Vec::new();
let mut chars = s.chars().peekable();
while let Some(ch) = chars.next() {
if ch == '$' {
let mut var_name = String::new();
while let Some(&next_ch) = chars.peek() {
if next_ch.is_alphanumeric() || next_ch == '_' {
var_name.push(next_ch);
chars.next();
} else {
break;
}
}
if !var_name.is_empty() {
vars.push(var_name);
}
}
}
vars
}
fn parse_statement( fn parse_statement(
&self, &self,
lines: &[&str], lines: &[&str],
mut i: usize, mut i: usize,
) -> Result<(Option<AstNode>, usize), RushError> {
self.parse_statement_with_context(lines, i, false)
}
fn parse_statement_with_context(
&self,
lines: &[&str],
mut i: usize,
in_parallel_context: bool,
) -> Result<(Option<AstNode>, usize), RushError> { ) -> Result<(Option<AstNode>, usize), RushError> {
let line = lines[i].trim(); let line = lines[i].trim();
// skip empty lines and comments if line.is_empty() || line.starts_with('#') || line == "}" {
if line.is_empty() || line.starts_with('#') {
return Ok((None, i + 1)); return Ok((None, i + 1));
} }
// parse variable assignment: name = "value" if line.starts_with("run ") && !in_parallel_context {
// make sure it's actually an assignment (not a command with = in args) return Err(RushError::SyntaxError(
"The 'run' keyword can only be used inside 'parallel' or 'workers' blocks".to_string()
));
}
if in_parallel_context && line.starts_with("run") {
if !line.contains('{') {
return Err(RushError::SyntaxError(
format!("Expected '{{' after 'run' keyword on line {}: {}", i + 1, line)
));
}
let mut run_body = Vec::new();
if line.contains('}') {
let start = line.find('{').unwrap() + 1;
let end = line.rfind('}').unwrap();
let content = line[start..end].trim();
if content.is_empty() {
return Err(RushError::SyntaxError(
format!("Empty 'run' block on line {}: {}", i + 1, line)
));
}
for cmd_part in content.split(';') {
let cmd_trimmed = cmd_part.trim();
if !cmd_trimmed.is_empty() {
let parts: Vec<&str> = cmd_trimmed.split_whitespace().collect();
if !parts.is_empty() {
let cmd_name = parts[0].to_string();
let args: Vec<AstNode> = parts[1..]
.iter()
.map(|arg| AstNode::Literal(arg.trim_matches('"').to_string()))
.collect();
run_body.push(AstNode::Command {
name: cmd_name,
args,
});
}
}
}
return Ok((Some(AstNode::Parallel { blocks: vec![run_body] }), i + 1));
} else {
i += 1;
let block_start_line = i;
while i < lines.len() {
let run_line = lines[i].trim();
if run_line.starts_with('}') {
i += 1;
break;
}
let (node, next_i) = self.parse_statement_with_context(lines, i, false)?;
if let Some(n) = node {
run_body.push(n);
}
i = next_i;
}
if i >= lines.len() && !lines[i-1].trim().starts_with('}') {
return Err(RushError::SyntaxError(
format!("Missing closing '}}' for 'run' block starting at line {}", block_start_line)
));
}
return Ok((Some(AstNode::Parallel { blocks: vec![run_body] }), i));
}
}
if line.contains('=') if line.contains('=')
&& !line.starts_with("if") && !line.starts_with("if")
&& !line.starts_with("for") && !line.starts_with("for")
@@ -173,7 +276,6 @@ impl Parser {
let parts: Vec<&str> = line.splitn(2, '=').collect(); let parts: Vec<&str> = line.splitn(2, '=').collect();
if parts.len() == 2 { if parts.len() == 2 {
let var_name = parts[0].trim(); let var_name = parts[0].trim();
// only treat as assignment if var_name is a valid identifier (no spaces, no special chars)
if !var_name.is_empty() && var_name.chars().all(|c| c.is_alphanumeric() || c == '_') if !var_name.is_empty() && var_name.chars().all(|c| c.is_alphanumeric() || c == '_')
{ {
let value = parts[1].trim().trim_matches('"').to_string(); let value = parts[1].trim().trim_matches('"').to_string();
@@ -188,71 +290,187 @@ impl Parser {
} }
} }
// parse for loop: for var in items { ... }
if line.starts_with("for ") { if line.starts_with("for ") {
// parse: for i in 1 2 3 { // parse: for i in 1 2 3 {
let parts: Vec<&str> = line.split_whitespace().collect(); let parts: Vec<&str> = line.split_whitespace().collect();
if parts.len() >= 4 && parts[0] == "for" && parts[2] == "in" {
let var_name = parts[1].to_string(); if parts.len() < 4 {
return Err(RushError::SyntaxError(
// collect items until we hit '{' format!("Invalid 'for' loop syntax on line {}: Expected 'for VAR in ITEMS {{ ... }}'", i + 1)
let mut items = Vec::new();
for part in &parts[3..] {
if *part == "{" {
break;
}
items.push(part.trim_matches('"').to_string());
}
// parse body
i += 1;
let mut body = Vec::new();
while i < lines.len() && !lines[i].trim().starts_with('}') {
let (node, next_i) = self.parse_statement(lines, i)?;
if let Some(n) = node {
body.push(n);
}
i = next_i;
}
i += 1; // skip closing brace
return Ok((
Some(AstNode::For {
var: var_name,
items,
body,
}),
i,
)); ));
} }
if parts[0] != "for" {
return Err(RushError::SyntaxError(
format!("Expected 'for' keyword on line {}", i + 1)
));
}
if parts[2] != "in" {
return Err(RushError::SyntaxError(
format!("Expected 'in' keyword in for loop on line {}: {}", i + 1, line)
));
}
if !line.contains('{') {
return Err(RushError::SyntaxError(
format!("Missing '{{' in 'for' loop on line {}: {}", i + 1, line)
));
}
let var_name = parts[1].to_string();
let mut items = Vec::new();
for part in &parts[3..] {
if *part == "{" {
break;
}
items.push(part.trim_matches('"').to_string());
}
if items.is_empty() {
return Err(RushError::SyntaxError(
format!("'for' loop has no items to iterate over on line {}: {}", i + 1, line)
));
}
i += 1;
let loop_start_line = i;
let mut body = Vec::new();
while i < lines.len() && !lines[i].trim().starts_with('}') {
let (node, next_i) = self.parse_statement_with_context(lines, i, in_parallel_context)?;
if let Some(n) = node {
body.push(n);
}
i = next_i;
}
if i >= lines.len() {
return Err(RushError::SyntaxError(
format!("Missing closing '}}' for 'for' loop starting at line {}", loop_start_line)
));
}
i += 1; // skip closing brace
return Ok((
Some(AstNode::For {
var: var_name,
items,
body,
}),
i,
));
} }
// parse parallel block: parallel { ... } if line.starts_with("if ") {
if line.starts_with("parallel") && line.contains('{') { if !line.contains('{') {
return Err(RushError::SyntaxError(
format!("Missing '{{' in 'if' statement on line {}: {}", i + 1, line)
));
}
let cond_start = 3; // after "if "
let cond_end = line.find('{').unwrap();
let condition_str = line[cond_start..cond_end].trim();
if condition_str.is_empty() {
return Err(RushError::SyntaxError(
format!("Empty condition in 'if' statement on line {}: {}", i + 1, line)
));
}
let condition = Box::new(AstNode::Literal(condition_str.to_string()));
i += 1; i += 1;
let if_start_line = i;
let mut then_branch = Vec::new();
while i < lines.len() {
let current = lines[i].trim();
if current.starts_with('}') {
if !current.contains("else") {
i += 1;
}
break;
}
let (node, next_i) = self.parse_statement(lines, i)?;
if let Some(n) = node {
then_branch.push(n);
}
i = next_i;
}
if i >= lines.len() {
return Err(RushError::SyntaxError(
format!("Missing closing '}}' for 'if' block starting at line {}", if_start_line)
));
}
let mut else_branch = None;
if i < lines.len() {
let current = lines[i].trim();
if current.starts_with("} else") || current.starts_with("else") {
if !current.contains('{') && (i + 1 >= lines.len() || !lines[i + 1].contains('{')) {
return Err(RushError::SyntaxError(
format!("Missing '{{' after 'else' keyword on line {}: {}", i + 1, current)
));
}
i += 1; // skip "} else {" or "else {"
let mut else_nodes = Vec::new();
while i < lines.len() {
let current = lines[i].trim();
if current.starts_with('}') {
i += 1;
break;
}
let (node, next_i) = self.parse_statement(lines, i)?;
if let Some(n) = node {
else_nodes.push(n);
}
i = next_i;
}
else_branch = Some(else_nodes);
}
}
return Ok((
Some(AstNode::ControlFlow {
condition,
then_branch,
else_branch,
}),
i,
));
}
if line.starts_with("parallel") {
if !line.contains('{') {
return Err(RushError::SyntaxError(
format!("Missing '{{' after 'parallel' keyword on line {}: {}", i + 1, line)
));
}
i += 1;
let parallel_start_line = i;
let mut blocks = Vec::new(); let mut blocks = Vec::new();
while i < lines.len() { while i < lines.len() {
let inner_line = lines[i].trim(); let inner_line = lines[i].trim();
// end of parallel block
if inner_line.starts_with('}') { if inner_line.starts_with('}') {
i += 1; i += 1;
break; break;
} }
// handle 'run {' blocks inside parallel
if inner_line.starts_with("run") && inner_line.contains('{') { if inner_line.starts_with("run") && inner_line.contains('{') {
let mut current_block = Vec::new(); let mut current_block = Vec::new();
// check if single line
if inner_line.contains('}') { if inner_line.contains('}') {
let start = inner_line.find('{').unwrap() + 1; let start = inner_line.find('{').unwrap() + 1;
let end = inner_line.rfind('}').unwrap(); let end = inner_line.rfind('}').unwrap();
let content = &inner_line[start..end].trim(); let content = &inner_line[start..end].trim();
// parse commands separated by semicolons
for cmd_part in content.split(';') { for cmd_part in content.split(';') {
let cmd_trimmed = cmd_part.trim(); let cmd_trimmed = cmd_part.trim();
if !cmd_trimmed.is_empty() { if !cmd_trimmed.is_empty() {
@@ -275,20 +493,17 @@ impl Parser {
blocks.push(current_block); blocks.push(current_block);
i += 1; i += 1;
} else { } else {
// multi line run block
i += 1; i += 1;
while i < lines.len() { while i < lines.len() {
let run_line = lines[i].trim(); let run_line = lines[i].trim();
// end of this run block
if run_line.starts_with('}') { if run_line.starts_with('}') {
blocks.push(current_block); blocks.push(current_block);
i += 1; i += 1;
break; break;
} }
// handle multiple commands on one line separated by semicolons
if run_line.contains(';') { if run_line.contains(';') {
for cmd_part in run_line.split(';') { for cmd_part in run_line.split(';') {
let cmd_trimmed = cmd_part.trim(); let cmd_trimmed = cmd_part.trim();
@@ -314,7 +529,7 @@ impl Parser {
} }
i += 1; i += 1;
} else { } else {
let (node, next_i) = self.parse_statement(lines, i)?; let (node, next_i) = self.parse_statement_with_context(lines, i, true)?;
if let Some(n) = node { if let Some(n) = node {
current_block.push(n); current_block.push(n);
} }
@@ -323,46 +538,80 @@ impl Parser {
} }
} }
} else { } else {
// direct statement in parallel block (not inside a run {}) let (node, next_i) = self.parse_statement_with_context(lines, i, true)?;
let (node, next_i) = self.parse_statement(lines, i)?;
if let Some(n) = node { if let Some(n) = node {
blocks.push(vec![n]); blocks.push(vec![n]);
} }
i = next_i; i = next_i;
} }
} }
if i > parallel_start_line && (i >= lines.len() || !lines[i-1].trim().starts_with('}')) {
return Err(RushError::SyntaxError(
format!("Missing closing '}}' for 'parallel' block starting at line {}", parallel_start_line)
));
}
return Ok((Some(AstNode::Parallel { blocks }), i)); return Ok((Some(AstNode::Parallel { blocks }), i));
} }
// parse workers N {} block
if line.starts_with("workers ") { if line.starts_with("workers ") {
let parts: Vec<&str> = line.split_whitespace().collect(); let parts: Vec<&str> = line.split_whitespace().collect();
if parts.len() >= 2 {
let worker_count = parts[1].parse::<usize>().unwrap_or(1); if parts.len() < 2 {
return Err(RushError::SyntaxError(
i += 1; format!("Missing worker count in 'workers' statement on line {}: {}", i + 1, line)
let mut body = Vec::new();
while i < lines.len() && !lines[i].trim().starts_with('}') {
let (node, next_i) = self.parse_statement(lines, i)?;
if let Some(n) = node {
body.push(n);
}
i = next_i;
}
i += 1; // skip closing brace
return Ok((
Some(AstNode::Workers {
count: worker_count,
body,
}),
i,
)); ));
} }
let worker_count = match parts[1].parse::<usize>() {
Ok(count) if count > 0 => count,
Ok(_) => {
return Err(RushError::SyntaxError(
format!("Worker count must be greater than 0 on line {}: {}", i + 1, line)
));
}
Err(_) => {
return Err(RushError::SyntaxError(
format!("Invalid worker count '{}' on line {}: Expected a positive number", parts[1], i + 1)
));
}
};
if !line.contains('{') {
return Err(RushError::SyntaxError(
format!("Missing '{{' after 'workers {}' on line {}: {}", worker_count, i + 1, line)
));
}
i += 1;
let workers_start_line = i;
let mut body = Vec::new();
while i < lines.len() && !lines[i].trim().starts_with('}') {
let (node, next_i) = self.parse_statement_with_context(lines, i, true)?;
if let Some(n) = node {
body.push(n);
}
i = next_i;
}
if i >= lines.len() {
return Err(RushError::SyntaxError(
format!("Missing closing '}}' for 'workers' block starting at line {}", workers_start_line)
));
}
i += 1; // skip closing brace
return Ok((
Some(AstNode::Workers {
count: worker_count,
body,
}),
i,
));
} }
// parse command: echo "text" or any other command
if !line.is_empty() { if !line.is_empty() {
let parts: Vec<&str> = line.split_whitespace().collect(); let parts: Vec<&str> = line.split_whitespace().collect();
if !parts.is_empty() { if !parts.is_empty() {

96
src/runtime/environment.rs
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@@ -1,18 +1,71 @@
use std::collections::HashMap; use std::collections::{HashMap, HashSet};
use std::env;
#[derive(Clone)] #[derive(Clone)]
pub struct Environment { pub struct Environment {
variables: HashMap<String, String>, variables: HashMap<String, String>,
builtin_vars: HashSet<String>,
} }
impl Environment { impl Environment {
pub fn new() -> Self { pub fn new() -> Self {
Environment { let mut env = Environment {
variables: HashMap::new(), variables: HashMap::new(),
builtin_vars: HashSet::new(),
};
env.init_builtins();
env
}
fn init_builtins(&mut self) {
let is_root = if unsafe { libc::geteuid() } == 0 {
"1"
} else {
"0"
};
self.set_builtin("IS_ROOT", is_root);
if let Ok(user) = env::var("USER") {
self.set_builtin("USER", &user);
} else {
self.set_builtin("USER", "unknown");
} }
if let Ok(home) = env::var("HOME") {
self.set_builtin("HOME", &home);
} else {
self.set_builtin("HOME", "/");
}
if let Ok(shell) = env::var("SHELL") {
self.set_builtin("SHELL", &shell);
} else {
self.set_builtin("SHELL", "/bin/sh");
}
if let Ok(pwd) = env::var("PWD") {
self.set_builtin("PWD", &pwd);
} else if let Ok(pwd) = env::current_dir() {
self.set_builtin("PWD", pwd.to_str().unwrap_or("/"));
} else {
self.set_builtin("PWD", "/");
}
self.set_builtin("OS", std::env::consts::OS);
self.set_builtin("ARCH", std::env::consts::ARCH);
}
fn set_builtin(&mut self, name: &str, value: &str) {
self.variables.insert(name.to_string(), value.to_string());
self.builtin_vars.insert(name.to_string());
} }
pub fn set_variable(&mut self, name: String, value: String) { pub fn set_variable(&mut self, name: String, value: String) {
if self.builtin_vars.contains(&name) {
eprintln!("Warning: Overriding built-in variable '{}'", name);
}
self.variables.insert(name, value); self.variables.insert(name, value);
} }
@@ -23,4 +76,43 @@ impl Environment {
pub fn remove_variable(&mut self, name: &str) { pub fn remove_variable(&mut self, name: &str) {
self.variables.remove(name); self.variables.remove(name);
} }
pub fn is_builtin(&self, name: &str) -> bool {
self.builtin_vars.contains(name)
}
pub fn substitute_variables(&self, s: &str) -> String {
let mut result = String::new();
let mut chars = s.chars().peekable();
while let Some(ch) = chars.next() {
if ch == '$' {
let mut var_name = String::new();
while let Some(&next_ch) = chars.peek() {
if next_ch.is_alphanumeric() || next_ch == '_' {
var_name.push(next_ch);
chars.next();
} else {
break;
}
}
if !var_name.is_empty() {
if let Some(value) = self.get_variable(&var_name) {
result.push_str(value);
} else {
result.push('$');
result.push_str(&var_name);
}
} else {
result.push('$');
}
} else {
result.push(ch);
}
}
result
}
} }

6
vsc-extension/package.json Normal file
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@@ -0,0 +1,6 @@
{
"devDependencies": {
"yo": "^5.1.0",
"generator-code": "^1.11.13"
}
}

5715
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17
vsc-extension/rush/.vscode/launch.json vendored Normal file
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@@ -0,0 +1,17 @@
// A launch configuration that launches the extension inside a new window
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
{
"version": "0.2.0",
"configurations": [
{
"name": "Extension",
"type": "extensionHost",
"request": "launch",
"args": [
"--extensionDevelopmentPath=${workspaceFolder}"
]
}
]
}

4
vsc-extension/rush/.vscodeignore Normal file
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@@ -0,0 +1,4 @@
.vscode/**
.vscode-test/**
.gitignore
vsc-extension-quickstart.md

9
vsc-extension/rush/CHANGELOG.md Normal file
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@@ -0,0 +1,9 @@
# Change Log
All notable changes to the "rush" extension will be documented in this file.
Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
## [Unreleased]
- Initial release

47
vsc-extension/rush/INSTALL.md Normal file
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@@ -0,0 +1,47 @@
# Installing the Rush VS Code Extension
## Method 1: Install from VSIX file (Recommended for sharing)
1. **Get the VSIX file**: `rush-0.0.1.vsix` (located in this directory)
2. **Install in VS Code**:
- Open VS Code
- Press `Ctrl+Shift+P` (or `Cmd+Shift+P` on Mac)
- Type: `Extensions: Install from VSIX...`
- Select the `rush-0.0.1.vsix` file
- Restart VS Code if prompted
3. **Verify installation**:
- Open any `.rush` or `.rsh` file
- You should see syntax highlighting automatically
- Try typing `for` and pressing Tab to test snippets
## Method 2: Install via command line
```bash
code --install-extension rush-0.0.1.vsix
```
## Sharing with friends
Just send them the `rush-0.0.1.vsix` file! They can install it using Method 1 or 2 above.
## Features
- ✅ Syntax highlighting for all Rush keywords
- ✅ Built-in variable highlighting ($IS_ROOT, $USER, etc.)
- ✅ Shebang highlighting (#!/path/to/rush)
- ✅ Error detection for common syntax mistakes
- ✅ Code snippets (type `for`, `if`, `parallel`, etc.)
- ✅ Auto-closing braces and quotes
## Uninstalling
1. Open VS Code
2. Go to Extensions (Ctrl+Shift+X)
3. Find "Rush Shell"
4. Click the gear icon → Uninstall
---
**File location**: `/home/louis/dev/rush/vsc-extension/rush/rush-0.0.1.vsix`

153
vsc-extension/rush/README-old.md Normal file
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@@ -0,0 +1,153 @@
# rush README
This is the README for your extension "rush". After writing up a brief description, we recommend including the following sections.
## Features
Describe specific features of your extension including screenshots of your extension in action. Image paths are relative to this README file.
# Rush Shell Extension for VS Code
Syntax highlighting and basic validation support for Rush shell scripts (`.rush`, `.rsh`).
## Features
### Syntax Highlighting
- **Keywords**: `if`, `else`, `for`, `in`, `not`, `parallel`, `workers`, `run`
- **Built-in Variables**: `$IS_ROOT`, `$USER`, `$HOME`, `$SHELL`, `$PWD`, `$OS`, `$ARCH`
- **Variables**: `$VARNAME` with proper substitution highlighting
- **Comments**: `# comments` and shebangs `#!/path/to/rush`
- **Strings**: Double-quoted strings with embedded variable highlighting
- **Commands**: Common shell commands like `echo`, `ls`, `cd`, etc.
### Error Highlighting
The extension highlights common syntax errors:
- Missing `{` after `for`, `if`, `parallel`, `workers`
- `run` keyword used without braces
- Missing `in` keyword in `for` loops
### Code Snippets
Type these prefixes and press Tab:
- `for` - Create a for loop
- `if` - Create an if statement
- `ifelse` - Create an if-else statement
- `parallel` - Create a parallel execution block
- `workers` - Create a workers block
- `run` - Create a run block
- `echo` - Echo command
- `var` - Variable assignment
## Usage
1. Open any `.rush` or `.rsh` file
2. Syntax highlighting will be applied automatically
3. Type snippet prefixes for quick code generation
4. Syntax errors will be highlighted in red
## Example
```rush
#!/home/user/rush/target/debug/rush
# Built-in variables
echo "User: $USER"
echo "Home: $HOME"
# For loops
for i in 1 2 3 {
echo "Count: $i"
}
# Parallel execution
parallel {
run { echo "Task 1" }
run { echo "Task 2" }
}
# Workers with concurrency
workers 2 {
for task in alpha beta gamma {
run { echo "Processing: $task" }
}
}
# Conditionals
if not $IS_ROOT {
echo "Running as regular user"
} else {
echo "Running as root"
}
```
## Requirements
- VS Code 1.105.0 or higher
## Release Notes
### 0.0.1
Initial release:
- Syntax highlighting for Rush shell scripts
- Basic error detection
- Code snippets for common patterns
> Tip: Many popular extensions utilize animations. This is an excellent way to show off your extension! We recommend short, focused animations that are easy to follow.
## Requirements
If you have any requirements or dependencies, add a section describing those and how to install and configure them.
## Extension Settings
Include if your extension adds any VS Code settings through the `contributes.configuration` extension point.
For example:
This extension contributes the following settings:
* `myExtension.enable`: Enable/disable this extension.
* `myExtension.thing`: Set to `blah` to do something.
## Known Issues
Calling out known issues can help limit users opening duplicate issues against your extension.
## Release Notes
Users appreciate release notes as you update your extension.
### 1.0.0
Initial release of ...
### 1.0.1
Fixed issue #.
### 1.1.0
Added features X, Y, and Z.
---
## Working with Markdown
You can author your README using Visual Studio Code. Here are some useful editor keyboard shortcuts:
* Split the editor (`Cmd+\` on macOS or `Ctrl+\` on Windows and Linux).
* Toggle preview (`Shift+Cmd+V` on macOS or `Shift+Ctrl+V` on Windows and Linux).
* Press `Ctrl+Space` (Windows, Linux, macOS) to see a list of Markdown snippets.
## For more information
* [Visual Studio Code's Markdown Support](http://code.visualstudio.com/docs/languages/markdown)
* [Markdown Syntax Reference](https://help.github.com/articles/markdown-basics/)
**Enjoy!**

39
vsc-extension/rush/README.md Normal file
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@@ -0,0 +1,39 @@
# Rush Shell Extension for VS Code
Syntax highlighting and basic validation support for Rush shell scripts (`.rush`, `.rsh`).
## Features
### Syntax Highlighting & Code Snippets
Type these prefixes and press Tab:
- `for` - Create a for loop
- `if` - Create an if statement
- `ifelse` - Create an if-else statement
- `parallel` - Create a parallel execution block
- `workers` - Create a workers block
- `run` - Create a run block
- `echo` - Echo command
- `var` - Variable assignment
## Usage
1. Open any `.rush` or `.rsh` file
2. Syntax highlighting will be applied automatically
3. Type snippet prefixes for quick code generation
4. Syntax errors will be highlighted in red
## Requirements
- VS Code 1.105.0 or higher
## Release Notes
### 0.0.1
Initial release:
- Syntax highlighting for Rush shell scripts
- Basic error detection
- Code snippets for common patterns

24
vsc-extension/rush/language-configuration.json Normal file
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@@ -0,0 +1,24 @@
{
"brackets": [
["{", "}"],
["[", "]"],
["(", ")"]
],
"autoClosingPairs": [
["{", "}"],
["[", "]"],
["(", ")"],
["\"", "\""]
],
"surroundingPairs": [
["{", "}"],
["[", "]"],
["(", ")"],
["\"", "\""]
],
"wordPattern": "(-?\\d*\\.\\d\\w*)|([^\\`\\~\\!\\@\\#\\%\\^\\&\\*\\(\\)\\-\\=\\+\\[\\{\\]\\}\\\\\\|\\;\\:\\'\\\"\\,\\.\\<\\>\\/\\?\\s]+)",
"indentationRules": {
"increaseIndentPattern": "^.*\\{[^}]*$",
"decreaseIndentPattern": "^\\s*\\}.*$"
}
}

4224
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57
vsc-extension/rush/package.json Normal file
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@@ -0,0 +1,57 @@
{
"name": "rush",
"displayName": "Rush Shell",
"description": "Syntax highlighting and validation for Rush shell scripts",
"version": "0.0.1",
"publisher": "rush-lang",
"repository": {
"type": "git",
"url": "https://git.louiscreates.com/tototomate123/rush"
},
"engines": {
"vscode": "^1.105.0"
},
"categories": [
"Programming Languages",
"Snippets"
],
"keywords": [
"rush",
"shell",
"scripting",
"parallel",
"concurrency"
],
"contributes": {
"languages": [
{
"id": "rush",
"aliases": [
"Rush",
"rush"
],
"extensions": [
".rush",
".rsh"
],
"configuration": "./language-configuration.json"
}
],
"grammars": [
{
"language": "rush",
"scopeName": "source.rush",
"path": "./syntaxes/rush.tmLanguage.json"
}
],
"snippets": [
{
"language": "rush",
"path": "./snippets/rush.json"
}
]
},
"devDependencies": {
"@vscode/vsce": "^3.6.2"
}
}

74
vsc-extension/rush/snippets/rush.json Normal file
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@@ -0,0 +1,74 @@
{
"For Loop": {
"prefix": "for",
"body": [
"for ${1:i} in ${2:items} {",
"\t$0",
"}"
],
"description": "For loop with items"
},
"If Statement": {
"prefix": "if",
"body": [
"if ${1:condition} {",
"\t$0",
"}"
],
"description": "If statement"
},
"If-Else Statement": {
"prefix": "ifelse",
"body": [
"if ${1:condition} {",
"\t$2",
"} else {",
"\t$0",
"}"
],
"description": "If-else statement"
},
"Parallel Block": {
"prefix": "parallel",
"body": [
"parallel {",
"\trun { ${1:command} }",
"\trun { ${2:command} }",
"\t$0",
"}"
],
"description": "Parallel execution block"
},
"Workers Block": {
"prefix": "workers",
"body": [
"workers ${1:2} {",
"\t$0",
"}"
],
"description": "Workers block with concurrency limit"
},
"Run Block": {
"prefix": "run",
"body": [
"run {",
"\t$0",
"}"
],
"description": "Run block (use inside parallel/workers)"
},
"Echo": {
"prefix": "echo",
"body": [
"echo \"$0\""
],
"description": "Echo command"
},
"Variable Assignment": {
"prefix": "var",
"body": [
"${1:VARNAME} = \"${2:value}\"$0"
],
"description": "Variable assignment"
}
}

172
vsc-extension/rush/syntaxes/rush.tmLanguage.json Normal file
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@@ -0,0 +1,172 @@
{
"$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
"name": "Rush",
"patterns": [
{
"include": "#shebang"
},
{
"include": "#invalid-syntax"
},
{
"include": "#comments"
},
{
"include": "#keywords"
},
{
"include": "#control-flow"
},
{
"include": "#builtin-variables"
},
{
"include": "#variables"
},
{
"include": "#strings"
},
{
"include": "#numbers"
},
{
"include": "#operators"
},
{
"include": "#commands"
}
],
"repository": {
"shebang": {
"patterns": [
{
"name": "meta.shebang.rush",
"match": "\\A#!.*$",
"captures": {
"0": {
"name": "comment.line.shebang.rush"
}
}
}
]
},
"invalid-syntax": {
"patterns": [
{
"name": "invalid.illegal.missing-brace.rush",
"comment": "for/if/parallel/workers without opening brace on same line",
"match": "^\\s*(for\\s+\\w+\\s+in\\s+[^{]+$|if\\s+[^{]+$|parallel\\s*$|workers\\s+\\d+\\s*$)"
},
{
"name": "invalid.illegal.run-without-brace.rush",
"comment": "run keyword not followed by opening brace",
"match": "\\brun\\s+(?!\\{)\\w"
},
{
"name": "invalid.illegal.missing-in.rush",
"comment": "for loop without 'in' keyword",
"match": "\\bfor\\s+\\w+\\s+(?!in\\b)\\w"
}
]
},
"comments": {
"patterns": [
{
"name": "comment.line.number-sign.rush",
"match": "#(?!!).*$"
}
]
},
"keywords": {
"patterns": [
{
"name": "keyword.control.rush",
"match": "\\b(if|else|for|in|while|return|not)\\b"
},
{
"name": "keyword.other.rush",
"match": "\\b(parallel|workers|run)\\b"
}
]
},
"control-flow": {
"patterns": [
{
"name": "keyword.control.conditional.rush",
"match": "\\b(if|else)\\b"
},
{
"name": "keyword.control.loop.rush",
"match": "\\b(for|while|in)\\b"
}
]
},
"builtin-variables": {
"patterns": [
{
"name": "variable.language.rush",
"match": "\\$\\b(IS_ROOT|USER|HOME|SHELL|PWD|OS|ARCH)\\b"
}
]
},
"variables": {
"patterns": [
{
"name": "variable.other.rush",
"match": "\\$[a-zA-Z_][a-zA-Z0-9_]*"
},
{
"name": "variable.other.assignment.rush",
"match": "\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*(?==)"
}
]
},
"strings": {
"patterns": [
{
"name": "string.quoted.double.rush",
"begin": "\"",
"end": "\"",
"patterns": [
{
"include": "#variables"
},
{
"name": "constant.character.escape.rush",
"match": "\\\\."
}
]
}
]
},
"numbers": {
"patterns": [
{
"name": "constant.numeric.rush",
"match": "\\b[0-9]+\\b"
}
]
},
"operators": {
"patterns": [
{
"name": "keyword.operator.assignment.rush",
"match": "="
},
{
"name": "punctuation.definition.block.rush",
"match": "[{}]"
}
]
},
"commands": {
"patterns": [
{
"name": "support.function.builtin.rush",
"match": "\\b(echo|exit|cd|ls|mkdir|rm|cp|mv|cat|grep|find|chmod|chown)\\b"
}
]
}
},
"scopeName": "source.rush"
}

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vsc-extension/rush/vsc-extension-quickstart.md Normal file
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# Welcome to your VS Code Extension
## What's in the folder
* This folder contains all of the files necessary for your extension.
* `package.json` - this is the manifest file in which you declare your language support and define the location of the grammar file that has been copied into your extension.
* `syntaxes/rush.tmLanguage.json` - this is the Text mate grammar file that is used for tokenization.
* `language-configuration.json` - this is the language configuration, defining the tokens that are used for comments and brackets.
## Get up and running straight away
* Make sure the language configuration settings in `language-configuration.json` are accurate.
* Press `F5` to open a new window with your extension loaded.
* Create a new file with a file name suffix matching your language.
* Verify that syntax highlighting works and that the language configuration settings are working.
## Make changes
* You can relaunch the extension from the debug toolbar after making changes to the files listed above.
* You can also reload (`Ctrl+R` or `Cmd+R` on Mac) the VS Code window with your extension to load your changes.
## Add more language features
* To add features such as IntelliSense, hovers and validators check out the VS Code extenders documentation at https://code.visualstudio.com/api/language-extensions/overview
## Install your extension
* To start using your extension with Visual Studio Code copy it into the `<user home>/.vscode/extensions` folder and restart Code.
* To share your extension with the world, read on https://code.visualstudio.com/api/working-with-extensions/publishing-extension about publishing an extension.