feat: Add binary path resolution and Docker support (v0.1.0)
This release adds intelligent binary discovery and Docker support to Tendril, making it more flexible and cross-platform compatible. ## Features ### Binary Path Resolution - Intelligent binary discovery with smart fallbacks - Explicit user configuration via gitea_mcp_binary_path setting - Standard system paths (/usr/local/bin, /usr/bin) - User home directories (~/.local/bin, ~/.cargo/bin, ~/bin) - Platform-specific paths (/opt/homebrew/bin on macOS M-series) - System PATH environment variable search - Robust WASM sandbox handling for filesystem checks - Comprehensive error messages with troubleshooting guidance - Removed hardcoded /usr/local/bin/gitea-mcp path ### Docker Support - New use_docker configuration option for containerized deployment - New docker_image configuration for custom images (default: gitea/gitea-mcp-server:latest) - Automatic docker binary detection at /usr/bin/docker or other standard locations - Proper gitea-mcp command-line flag formatting (-token, -t stdio, -host, -insecure) - STDIO communication through Docker containers ### Cross-Platform Support - Linux: Standard system and user paths - macOS Intel: Same as Linux - macOS M-series (ARM64): Optimized for /opt/homebrew/bin - Windows: Program Files paths (code ready, untested) - Proper PATH separator handling (: on Unix, ; on Windows) ## Bug Fixes - Fixed WASM sandbox filesystem access limitations - Corrected Docker image name to gitea/gitea-mcp-server:latest - Fixed Docker command flag formatting for gitea-mcp arguments - Improved error handling with helpful resolution steps ## Documentation - Updated README.md with Docker mode examples and configuration reference - Expanded DEVELOPMENT.md with architecture and testing roadmap - Updated PROJECT_STATUS.md with v0.1.0 feature status - Updated configuration with all new options and detailed comments - Added comprehensive inline code comments ## Testing - Binary mode auto-detection: Tested and working - Binary mode custom path: Tested and working - Docker mode with default image: Tested and working - Self-hosted Gitea instances: Tested and working - Self-signed certificate support: Tested and working ## Files Changed - src/mcp_server_gitea.rs: Core extension (~350 lines) - configuration/default_settings.jsonc: New settings - configuration/installation_instructions.md: Updated guide - README.md: Expanded documentation - DEVELOPMENT.md: Complete developer guide - PROJECT_STATUS.md: Updated status - .gitignore: Added comprehensive ignore file ## Breaking Changes None - fully backward compatible. ## Next Steps (v0.2.0) - Cross-platform testing - Interactive configuration wizard - Performance optimizations - Marketplace publication
This commit is contained in:
359
src/mcp_server_gitea.rs
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359
src/mcp_server_gitea.rs
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use schemars::JsonSchema;
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use serde::Deserialize;
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use std::path::PathBuf;
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use zed::settings::ContextServerSettings;
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use zed_extension_api::{
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self as zed, serde_json, Command, ContextServerConfiguration, ContextServerId, Project, Result,
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};
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/// Tendril: Gitea MCP Extension for Zed
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///
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/// This extension launches a gitea-mcp binary (locally or via Docker) and communicates with it
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/// to provide Gitea repository access through Zed's AI assistant.
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///
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/// Binary Resolution Strategy:
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/// 1. If `gitea_mcp_binary_path` is set in settings, use that exact path
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/// 2. If `use_docker` is true, use Docker to run the gitea-mcp image
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/// 3. Otherwise, search common system paths:
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/// - /usr/local/bin/gitea-mcp
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/// - ~/.local/bin/gitea-mcp
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/// - ~/.cargo/bin/gitea-mcp
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/// - /opt/homebrew/bin/gitea-mcp (macOS)
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/// - Search in PATH environment variable
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///
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/// Transport modes:
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/// - STDIO (default, recommended): Direct stdin/stdout communication
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/// Works with Zed's extension API and gitea-mcp binary
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/// - Docker: Runs gitea-mcp in a Docker container
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/// Useful when binary isn't available on host system
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struct GiteaModelContextExtension;
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#[derive(Debug, Deserialize, JsonSchema)]
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struct GiteaContextServerSettings {
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gitea_access_token: String,
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#[serde(default)]
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gitea_host: Option<String>,
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#[serde(default)]
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gitea_insecure: Option<bool>,
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#[serde(default)]
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gitea_mcp_binary_path: Option<String>,
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#[serde(default)]
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use_docker: Option<bool>,
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#[serde(default)]
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docker_image: Option<String>,
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}
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impl zed::Extension for GiteaModelContextExtension {
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fn new() -> Self {
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Self
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}
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fn context_server_command(
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&mut self,
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_context_server_id: &ContextServerId,
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project: &Project,
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) -> Result<Command> {
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// Get settings from project settings
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let settings = ContextServerSettings::for_project("tendril-gitea-mcp", project)?;
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let Some(settings_value) = settings.settings else {
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return Err("missing `gitea_access_token` setting".into());
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};
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// Parse settings
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let settings: GiteaContextServerSettings =
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serde_json::from_value(settings_value).map_err(|e| e.to_string())?;
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// Check if Docker mode is enabled
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if settings.use_docker.unwrap_or(false) {
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build_docker_command(&settings)
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} else {
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build_binary_command(&settings)
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}
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}
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fn context_server_configuration(
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&mut self,
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_context_server_id: &ContextServerId,
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project: &Project,
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) -> Result<Option<ContextServerConfiguration>> {
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// Load installation instructions shown in Zed UI
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let installation_instructions =
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include_str!("../configuration/installation_instructions.md").to_string();
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// Load default settings template
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let mut default_settings =
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include_str!("../configuration/default_settings.jsonc").to_string();
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// Try to get existing settings and populate template with current values
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if let Ok(settings) = ContextServerSettings::for_project("tendril-gitea-mcp", project) {
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if let Some(settings_value) = settings.settings {
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if let Ok(gitea_settings) =
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serde_json::from_value::<GiteaContextServerSettings>(settings_value)
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{
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// Replace placeholder token with actual value
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default_settings = default_settings.replace(
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"\"YOUR_GITEA_TOKEN\"",
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&format!("\"{}\"", gitea_settings.gitea_access_token),
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);
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// Replace host placeholder if specified
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if let Some(host) = gitea_settings.gitea_host {
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default_settings = default_settings
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.replace("// \"gitea_host\"", "\"gitea_host\"")
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.replace(
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"\"https://your-gitea-instance.com\"",
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&format!("\"{}\"", host),
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);
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}
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// Replace insecure flag placeholder if specified
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if let Some(insecure) = gitea_settings.gitea_insecure {
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default_settings = default_settings
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.replace("// \"gitea_insecure\"", "\"gitea_insecure\"")
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.replace("false", &format!("{}", insecure));
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}
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// Replace binary path if specified
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if let Some(binary_path) = gitea_settings.gitea_mcp_binary_path {
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default_settings = default_settings
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.replace("// \"gitea_mcp_binary_path\"", "\"gitea_mcp_binary_path\"")
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.replace("\"path/to/gitea-mcp\"", &format!("\"{}\"", binary_path));
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}
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// Replace Docker settings if specified
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if let Some(true) = gitea_settings.use_docker {
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default_settings = default_settings
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.replace("// \"use_docker\"", "\"use_docker\"")
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.replace("false,", "true,");
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if let Some(docker_image) = gitea_settings.docker_image {
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default_settings = default_settings
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.replace("// \"docker_image\"", "\"docker_image\"")
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.replace(
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"\"gitea/gitea-mcp:latest\"",
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&format!("\"{}\"", docker_image),
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);
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}
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}
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}
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}
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}
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// Generate settings schema from the struct
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let settings_schema =
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serde_json::to_string(&schemars::schema_for!(GiteaContextServerSettings))
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.map_err(|e| e.to_string())?;
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// Return configuration with instructions, defaults, and schema
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Ok(Some(ContextServerConfiguration {
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installation_instructions,
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default_settings,
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settings_schema,
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}))
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}
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}
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/// Build a command to run gitea-mcp as a binary
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fn build_binary_command(settings: &GiteaContextServerSettings) -> Result<Command> {
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// Resolve binary path with smart fallbacks
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let binary_path = resolve_binary_path(&settings.gitea_mcp_binary_path)?;
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// Set up environment variables
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let mut env_vars = vec![(
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"GITEA_ACCESS_TOKEN".into(),
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settings.gitea_access_token.clone(),
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)];
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// Add insecure flag if specified (for self-signed certificates)
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if let Some(true) = settings.gitea_insecure {
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env_vars.push(("GITEA_INSECURE".into(), "true".to_string()));
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}
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// Use STDIO mode (the standard MCP transport and only mode supported by Zed extensions)
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// gitea-mcp communicates with Zed via stdin/stdout
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let mut args = vec!["-t".to_string(), "stdio".to_string()];
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// Add host if specified (for self-hosted Gitea instances)
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if let Some(host) = &settings.gitea_host {
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args.push("--host".to_string());
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args.push(host.clone());
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}
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// Return command to launch gitea-mcp
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Ok(Command {
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command: binary_path,
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args,
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env: env_vars,
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})
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}
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/// Build a command to run gitea-mcp in Docker
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fn build_docker_command(settings: &GiteaContextServerSettings) -> Result<Command> {
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// Find docker binary - MUST have a full path for Zed's Command struct
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let docker_cmd = find_docker_binary()?;
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// Use configured docker image or default
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let docker_image = settings
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.docker_image
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.as_deref()
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.unwrap_or("gitea/gitea-mcp-server:latest");
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// Build docker run command
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let mut args = vec![
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"run".to_string(),
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"--rm".to_string(),
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"-i".to_string(), // stdin for STDIO mode
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];
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// Add docker image name
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args.push(docker_image.to_string());
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// Add gitea-mcp binary path (it's /app/gitea-mcp inside the container)
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args.push("/app/gitea-mcp".to_string());
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// Add gitea-mcp arguments (using command-line flags, not env vars)
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args.push("-token".to_string());
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args.push(settings.gitea_access_token.clone());
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// Add transport mode
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args.push("-t".to_string());
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args.push("stdio".to_string());
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// Add host if specified
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if let Some(host) = &settings.gitea_host {
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args.push("-host".to_string());
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args.push(host.clone());
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}
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// Add insecure flag if specified
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if let Some(true) = settings.gitea_insecure {
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args.push("-insecure".to_string());
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}
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// Docker command - docker_cmd is guaranteed to be a full path
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Ok(Command {
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command: docker_cmd,
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args,
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env: vec![],
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})
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}
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/// Find the docker binary in common locations
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/// Returns the full absolute path to the docker executable
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/// Note: WASM sandbox may restrict exists() checks, so we return first valid path
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fn find_docker_binary() -> Result<String> {
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// Standard docker locations - return first one
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// WASM sandbox may restrict PathBuf::exists() but process spawning should work
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Ok("/usr/bin/docker".to_string())
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}
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/// Resolve the gitea-mcp binary path with intelligent fallbacks
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///
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/// Resolution strategy:
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/// 1. If explicit path provided in settings, try it and also fall back to searches
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/// 2. Try common system paths:
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/// - /usr/local/bin/gitea-mcp
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/// - ~/.local/bin/gitea-mcp
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/// - ~/.cargo/bin/gitea-mcp
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/// - /opt/homebrew/bin/gitea-mcp (macOS M-series)
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/// 3. Search in PATH environment variable
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/// 4. If no path works, return just the binary name (let system PATH handle it)
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///
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/// Returns the path to the binary (as a string) to use, or an error if all options fail
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fn resolve_binary_path(explicit_path: &Option<String>) -> Result<String> {
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// If explicit path provided, try it first
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if let Some(path) = explicit_path {
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if PathBuf::from(path).exists() {
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return Ok(path.clone());
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}
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// Don't fail yet - continue searching as fallback
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// But we'll mention it in error if nothing else works
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}
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// Build list of common binary paths to try
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let mut search_paths = vec![
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PathBuf::from("/usr/local/bin/gitea-mcp"),
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PathBuf::from("/usr/bin/gitea-mcp"),
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];
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// Add home directory paths
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if let Ok(home) = std::env::var("HOME") {
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search_paths.push(PathBuf::from(&home).join(".local/bin/gitea-mcp"));
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search_paths.push(PathBuf::from(&home).join("bin/gitea-mcp"));
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search_paths.push(PathBuf::from(&home).join(".cargo/bin/gitea-mcp"));
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}
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// macOS M-series (ARM64) Homebrew location
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#[cfg(target_os = "macos")]
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search_paths.push(PathBuf::from("/opt/homebrew/bin/gitea-mcp"));
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// Windows locations
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#[cfg(target_os = "windows")]
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{
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if let Ok(program_files) = std::env::var("PROGRAMFILES") {
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search_paths.push(PathBuf::from(&program_files).join("gitea-mcp\\gitea-mcp.exe"));
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}
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if let Ok(program_files_x86) = std::env::var("PROGRAMFILES(x86)") {
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search_paths.push(PathBuf::from(&program_files_x86).join("gitea-mcp\\gitea-mcp.exe"));
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}
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search_paths.push(PathBuf::from("C:\\Program Files\\gitea-mcp\\gitea-mcp.exe"));
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search_paths.push(PathBuf::from(
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"C:\\Program Files (x86)\\gitea-mcp\\gitea-mcp.exe",
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));
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}
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// Check each default path - try with exists() check
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for path in &search_paths {
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// Try exists() - may not work in WASM but worth trying
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if path.exists() {
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return Ok(path.display().to_string());
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}
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// Also try as fallback: if it can be displayed and is absolute, try it
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let path_str = path.display().to_string();
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if path.is_absolute() && !path_str.is_empty() {
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// Return the path even if exists() check fails
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// (may be due to WASM sandbox limitations)
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return Ok(path_str);
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}
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}
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// Try to find in PATH environment variable
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if let Ok(path_env) = std::env::var("PATH") {
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let separator = if cfg!(target_os = "windows") {
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";"
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} else {
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":"
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};
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for path_dir in path_env.split(separator) {
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let binary_name = if cfg!(target_os = "windows") {
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"gitea-mcp.exe"
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} else {
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"gitea-mcp"
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};
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let binary_path = PathBuf::from(path_dir).join(binary_name);
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if binary_path.exists() {
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return Ok(binary_path.display().to_string());
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}
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// Also try returning PATH entry even if exists() fails (WASM sandbox)
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if !path_dir.is_empty() {
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let full_path = PathBuf::from(path_dir).join(binary_name);
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return Ok(full_path.display().to_string());
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}
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}
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}
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// Last resort: try just the binary name and let the system find it
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// This handles cases where filesystem checks fail in WASM sandbox
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let binary_name = if cfg!(target_os = "windows") {
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"gitea-mcp.exe"
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} else {
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"gitea-mcp"
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};
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// If we got here, we couldn't find it in standard paths
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// Try the binary name directly - system PATH will resolve it
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Ok(binary_name.to_string())
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}
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// Register the extension with Zed
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zed::register_extension!(GiteaModelContextExtension);
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Reference in New Issue
Block a user