sal/process

SAL Process Package

The sal-process package provides comprehensive functionality for managing and interacting with system processes across different platforms (Windows, macOS, and Linux).

Features

• Command Execution: Run commands and scripts with flexible options
• Process Management: List, find, and kill processes
• Cross-Platform: Works consistently across Windows, macOS, and Linux
• Builder Pattern: Fluent API for configuring command execution
• Rhai Integration: Full support for Rhai scripting language
• Error Handling: Comprehensive error types and handling

Installation

Add this to your Cargo.toml:

[dependencies]
sal-process = { path = "../process" }

Usage

Basic Command Execution

use sal_process::{run_command, run_silent};

// Run a command and capture output
let result = run_command("echo hello world")?;
println!("Output: {}", result.stdout);

// Run a command silently
let result = run_silent("ls -la")?;

Builder Pattern

use sal_process::run;

// Use the builder pattern for more control
let result = run("echo test")
    .silent(true)
    .die(false)
    .log(true)
    .execute()?;

Process Management

use sal_process::{which, process_list, process_get, kill};

// Check if a command exists
if let Some(path) = which("git") {
    println!("Git found at: {}", path);
}

// List all processes
let processes = process_list("")?;
println!("Found {} processes", processes.len());

// Find processes by pattern
let chrome_processes = process_list("chrome")?;

// Get a single process (errors if 0 or >1 matches)
let process = process_get("unique_process_name")?;

// Kill processes by pattern
kill("old_server")?;

Multiline Scripts

let script = r#"
    echo "Starting script"
    export VAR="test"
    echo "Variable: $VAR"
    echo "Script complete"
"#;

let result = run_command(script)?;

Rhai Integration

The package provides full Rhai integration for scripting:

// Basic command execution
let result = run_command("echo hello");
print(result.stdout);

// Builder pattern
let result = run("echo test")
    .silent()
    .ignore_error()
    .execute();

// Process management
let git_path = which("git");
if git_path != () {
    print(`Git found at: ${git_path}`);
}

let processes = process_list("chrome");
print(`Found ${processes.len()} Chrome processes`);

Error Handling

The package provides comprehensive error handling:

use sal_process::{run, RunError};

match run("some_command").execute() {
    Ok(result) => {
        if result.success {
            println!("Command succeeded: {}", result.stdout);
        } else {
            println!("Command failed with code: {}", result.code);
        }
    }
    Err(RunError::CommandExecutionFailed(e)) => {
        eprintln!("Failed to execute command: {}", e);
    }
    Err(e) => {
        eprintln!("Other error: {}", e);
    }
}

Builder Options

The run() function returns a builder with these options:

• .silent(bool): Suppress output to stdout/stderr
• .die(bool): Return error if command fails (default: true)
• .log(bool): Log command execution
• .async_exec(bool): Run command asynchronously

Cross-Platform Support

The package handles platform differences automatically:

• Windows: Uses cmd.exe for script execution
• Unix-like: Uses /bin/bash with -e flag for error handling
• Process listing: Uses appropriate tools (wmic on Windows, ps on Unix)
• Command detection: Uses where on Windows, which on Unix

Testing

Run the test suite:

cargo test

The package includes comprehensive tests:

• Unit tests for all functionality
• Integration tests for real-world scenarios
• Rhai script tests for scripting integration
• Cross-platform compatibility tests

Dependencies

• tempfile: For temporary script file creation
• rhai: For Rhai scripting integration
• anyhow: For error handling
• sal-text: For text processing utilities

Platform-specific dependencies:

• nix (Unix): For Unix-specific process operations
• windows (Windows): For Windows-specific process operations