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* Git remote URL parser for auto-discovery
*
* Parses git remote URLs to extract host and project path.
* Supports SSH and HTTPS formats, including nested groups.
*/
import * as fs from "fs/promises";
import * as path from "path";
import { logger } from "../logger";
// ============================================================================
// Types
// ============================================================================
export interface GitRemoteInfo {
/** GitLab host (e.g., gitlab.company.com) */
host: string;
/** Project path (e.g., group/project or group/subgroup/project) */
projectPath: string;
/** Remote URL protocol */
protocol: "ssh" | "https";
/** Original remote URL */
url: string;
/** Remote name (e.g., origin, upstream) */
remoteName: string;
}
export interface ParseGitRemoteOptions {
/** Remote name to use (default: origin) */
remoteName?: string;
/** Path to repository (default: current directory) */
repoPath?: string;
}
// ============================================================================
// URL Parsing
// ============================================================================
/**
* Parse a git remote URL into host and project path
*
* Supports:
* - SSH: git@host:group/project.git
* - SSH with port: ssh://git@host:port/group/project.git
* - HTTPS: https://host/group/project.git
* - HTTPS with port: https://host:port/group/project.git
*
* @param url Git remote URL
* @returns Parsed info or null if not a valid GitLab URL
*/
export function parseRemoteUrl(url: string): Omit<GitRemoteInfo, "remoteName"> | null {
// Normalize URL: trim whitespace
const normalizedUrl = url.trim();
// SSH format: git@host:path.git
const sshMatch = normalizedUrl.match(/^git@([^:]+):(.+?)(?:\.git)?$/);
if (sshMatch) {
return {
host: sshMatch[1],
projectPath: normalizeProjectPath(sshMatch[2]),
protocol: "ssh",
url: normalizedUrl,
};
}
// SSH with explicit protocol: ssh://git@host/path.git or ssh://git@host:port/path.git
const sshProtocolMatch = normalizedUrl.match(
/^ssh:\/\/git@([^/:]+)(?::(\d+))?\/(.+?)(?:\.git)?$/
);
if (sshProtocolMatch) {
const sshHost = sshProtocolMatch[2]
? `${sshProtocolMatch[1]}:${sshProtocolMatch[2]}`
: sshProtocolMatch[1];
return {
host: sshHost,
projectPath: normalizeProjectPath(sshProtocolMatch[3]),
protocol: "ssh",
url: normalizedUrl,
};
}
// HTTPS format: https://host/path.git or https://host:port/path.git
const httpsMatch = normalizedUrl.match(/^https?:\/\/([^/:]+)(?::(\d+))?\/(.+?)(?:\.git)?$/);
if (httpsMatch) {
const httpsHost = httpsMatch[2] ? `${httpsMatch[1]}:${httpsMatch[2]}` : httpsMatch[1];
return {
host: httpsHost,
projectPath: normalizeProjectPath(httpsMatch[3]),
protocol: "https",
url: normalizedUrl,
};
}
logger.debug({ url: normalizedUrl }, "Could not parse remote URL");
return null;
}
/**
* Normalize project path: remove leading/trailing slashes
*/
function normalizeProjectPath(projectPath: string): string {
return projectPath.replace(/^\/+|\/+$/g, "");
}
// ============================================================================
// Git Config Parsing
// ============================================================================
/**
* Parse git config file content to extract remote URLs
*
* Uses a state-based line-by-line parser to correctly handle multiline
* configurations where url may not immediately follow the remote header.
*
* @param content Git config file content
* @returns Map of remote name to URL
*/
export function parseGitConfig(content: string): Map<string, string> {
const remotes = new Map<string, string>();
const lines = content.split(/\r?\n/);
let currentRemote: string | null = null;
for (const rawLine of lines) {
const line = rawLine.trim();
if (line.length === 0) {
continue;
}
// Detect start of a [remote "name"] section
const remoteHeaderMatch = line.match(/^\[remote\s+"([^"]+)"\]\s*$/);
if (remoteHeaderMatch) {
currentRemote = remoteHeaderMatch[1];
continue;
}
// Any other section header ends the current remote section
if (line.startsWith("[") && line.endsWith("]")) {
currentRemote = null;
continue;
}
if (currentRemote === null) {
continue;
}
// Capture url = ... lines within the current remote section
const urlMatch = line.match(/^url\s*=\s*(.+)$/);
if (urlMatch) {
const url = urlMatch[1].trim();
Eif (url !== "") {
remotes.set(currentRemote, url);
}
}
}
return remotes;
}
/**
* Find the best GitLab remote from available remotes
*
* Priority:
* 1. Specified remote name (if provided)
* 2. "origin" remote
* 3. First available remote
*
* @param remotes Map of remote name to URL
* @param preferredRemote Preferred remote name
* @returns Best remote entry or null
*/
export function selectBestRemote(
remotes: Map<string, string>,
preferredRemote?: string
): { name: string; url: string } | null {
if (remotes.size === 0) {
return null;
}
// If preferred remote is specified and exists, use it
if (preferredRemote) {
const url = remotes.get(preferredRemote);
if (url !== undefined) {
return { name: preferredRemote, url };
}
}
// Prefer "origin"
const originUrl = remotes.get("origin");
if (originUrl !== undefined) {
return { name: "origin", url: originUrl };
}
// Fall back to first remote
const firstEntry = remotes.entries().next();
Iif (firstEntry.done) {
return null;
}
const [name, url] = firstEntry.value;
return { name, url };
}
// ============================================================================
// Main API
// ============================================================================
/**
* Parse git remote from a repository
*
* @param options Parsing options
* @returns GitRemoteInfo or null if no valid remote found
*/
export async function parseGitRemote(
options: ParseGitRemoteOptions = {}
): Promise<GitRemoteInfo | null> {
const repoPath = options.repoPath ?? process.cwd();
const gitConfigPath = path.join(repoPath, ".git", "config");
// Check if .git/config exists
try {
await fs.access(gitConfigPath);
} catch {
logger.debug({ path: repoPath }, "No .git/config found - not a git repository");
return null;
}
// Read and parse git config
let content: string;
try {
content = await fs.readFile(gitConfigPath, "utf-8");
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
logger.warn({ error: message, path: gitConfigPath }, "Failed to read git config");
return null;
}
// Parse remotes from config
const remotes = parseGitConfig(content);
if (remotes.size === 0) {
logger.debug({ path: repoPath }, "No remotes found in git config");
return null;
}
// Select best remote
const selected = selectBestRemote(remotes, options.remoteName);
Iif (!selected) {
return null;
}
// Parse the remote URL
const parsed = parseRemoteUrl(selected.url);
if (!parsed) {
logger.warn({ remote: selected.name, url: selected.url }, "Could not parse remote URL format");
return null;
}
logger.debug(
{
remote: selected.name,
host: parsed.host,
projectPath: parsed.projectPath,
protocol: parsed.protocol,
},
"Parsed git remote"
);
return {
...parsed,
remoteName: selected.name,
};
}
/**
* List all remotes from a repository
*
* @param repoPath Path to repository
* @returns Array of parsed remote info
*/
export async function listGitRemotes(repoPath?: string): Promise<GitRemoteInfo[]> {
const gitConfigPath = path.join(repoPath ?? process.cwd(), ".git", "config");
try {
const content = await fs.readFile(gitConfigPath, "utf-8");
const remotes = parseGitConfig(content);
const result: GitRemoteInfo[] = [];
for (const [name, url] of remotes) {
const parsed = parseRemoteUrl(url);
if (parsed) {
result.push({ ...parsed, remoteName: name });
}
}
return result;
} catch {
return [];
}
}
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