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src/docs/subdir/git.md
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src/docs/subdir/git.md
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# Git Module for Rhai
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This module provides Rhai wrappers for the Git functionality in SAL.
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> **Note:** The constructor for GitTree has been renamed from `new()` to `gittree_new()` to avoid confusion with other constructors. This makes the interface more explicit and less likely to cause naming conflicts.
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## Object-Oriented Design
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The Git module follows an object-oriented design with two main classes:
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1. **GitTree** - Represents a collection of git repositories under a base path
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- Created with `gittree_new(base_path)`
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- Methods for listing, finding, and getting repositories
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2. **GitRepo** - Represents a single git repository
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- Obtained from GitTree's `get()` method
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- Methods for common git operations: pull, reset, push, commit
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This design allows for a more intuitive and flexible interface, with method chaining for complex operations.
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## Creating a GitTree
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The GitTree object is the main entry point for git operations. It represents a collection of git repositories under a base path.
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```rhai
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// Create a new GitTree with a base path
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let git_tree = gittree_new("/root/code");
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print(`Created GitTree with base path: /home/user/code`);
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```
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## Finding Repositories
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### List All Repositories
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```rhai
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// List all git repositories under the base path
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let repos = git_tree.list();
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print(`Found ${repos.len()} repositories`);
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// Print the repositories
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for repo in repos {
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print(` - ${repo}`);
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}
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```
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### Find Repositories Matching a Pattern
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```rhai
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// Find repositories matching a pattern
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// Use a wildcard (*) suffix to find multiple matches
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let matching_repos = git_tree.find("my-project*");
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print("Matching repositories:");
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for repo in matching_repos {
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print(` - ${repo}`);
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}
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// Find a specific repository (must match exactly one)
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let specific_repo = git_tree.find("unique-project")[0];
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print(`Found specific repository: ${specific_repo}`);
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```
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## Working with Repositories
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### Get Repository Objects
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```rhai
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// Get GitRepo objects for repositories matching a pattern
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let repos = git_tree.get("my-project*");
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print(`Found ${repos.len()} repositories`);
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// Get a specific repository
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let repo = git_tree.get("unique-project")[0];
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print(`Working with repository: ${repo.path()}`);
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```
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### Clone a Repository
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```rhai
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// Clone a repository by URL
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// This will clone the repository to the base path of the GitTree
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let repos = git_tree.get("https://github.com/username/repo.git");
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let repo = repos[0];
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print(`Repository cloned to: ${repo.path()}`);
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```
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### Check for Changes
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```rhai
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// Check if a repository has uncommitted changes
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let repo = git_tree.get("my-project")[0];
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if repo.has_changes() {
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print("Repository has uncommitted changes");
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} else {
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print("Repository is clean");
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}
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```
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## Repository Operations
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### Pull Changes
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```rhai
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// Pull the latest changes from the remote
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// This will fail if there are uncommitted changes
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let repo = git_tree.get("my-project")[0];
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let result = repo.pull();
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print("Repository updated successfully");
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```
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### Reset Local Changes
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```rhai
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// Reset any local changes in the repository
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let repo = git_tree.get("my-project")[0];
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let result = repo.reset();
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print("Repository reset successfully");
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```
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### Commit Changes
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```rhai
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// Commit changes in the repository
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let repo = git_tree.get("my-project")[0];
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let result = repo.commit("Fix bug in login form");
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print("Changes committed successfully");
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```
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### Push Changes
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```rhai
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// Push changes to the remote
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let repo = git_tree.get("my-project")[0];
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let result = repo.push();
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print("Changes pushed successfully");
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```
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## Method Chaining
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The GitRepo methods can be chained together for more complex operations:
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```rhai
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// Commit changes and push them to the remote
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let repo = git_tree.get("my-project")[0];
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let result = repo.commit("Add new feature").push();
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print("Changes committed and pushed successfully");
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// Reset local changes, pull the latest changes, and commit new changes
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let repo = git_tree.get("my-project")[0];
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let result = repo.reset().pull().commit("Update dependencies");
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print("Repository updated successfully");
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```
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## Complete Example
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```rhai
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// Create a new GitTree
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let home_dir = env("HOME");
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let git_tree = gittree_new(`${home_dir}/code`);
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// Clone a repository
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let repos = git_tree.get("https://github.com/username/example-repo.git");
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let repo = repos[0];
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print(`Cloned repository to: ${repo.path()}`);
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// Make some changes (using OS module functions)
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let file_path = `${repo.path()}/README.md`;
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let content = "# Example Repository\n\nThis is an example repository.";
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write_file(file_path, content);
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// Commit and push the changes
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let result = repo.commit("Update README.md").push();
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print("Changes committed and pushed successfully");
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// List all repositories
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let all_repos = git_tree.list();
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print("All repositories:");
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for repo_path in all_repos {
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print(` - ${repo_path}`);
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}
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```
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## Error Handling
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All methods in the Git module return a Result type, which means they can either succeed or fail with an error. If an error occurs, it will be propagated to the Rhai script as a runtime error.
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For example, if you try to clone a repository that doesn't exist:
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```rhai
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// Try to clone a non-existent repository
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try {
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let git_tree = gittree_new("/root/code");
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let repos = git_tree.get("https://github.com/nonexistent/repo.git");
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print("This will not be executed if the repository doesn't exist");
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} catch(err) {
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print(`Error: ${err}`); // Will print the error message from git
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}
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```
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Common errors include:
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- Invalid URL
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- Repository not found
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- Authentication failure
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- Network issues
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- Local changes exist when trying to pull
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