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import * as fs from "fs";
import { z } from "zod";
import type { Request } from "express";
// Get package.json path
const packageJsonPath = path.resolve(process.cwd(), "package.json");
// Environment variables
export const GITLAB_TOKEN = process.env.GITLAB_TOKEN;
export const GITLAB_AUTH_COOKIE_PATH = process.env.GITLAB_AUTH_COOKIE_PATH;
export const IS_OLD = process.env.GITLAB_IS_OLD === "true";
export const GITLAB_READ_ONLY_MODE = process.env.GITLAB_READ_ONLY_MODE === "true";
/**
* Whether to include "Related:" cross-references in tool descriptions.
* When true (default), descriptions include hints to complementary tools.
* When false, "Related:" sections are stripped from all descriptions.
* Dynamic resolution (stripping refs to unavailable tools) still applies when enabled.
*/
export const GITLAB_CROSS_REFS = process.env.GITLAB_CROSS_REFS !== "false";
export const GITLAB_DENIED_TOOLS_REGEX = process.env.GITLAB_DENIED_TOOLS_REGEX
? new RegExp(process.env.GITLAB_DENIED_TOOLS_REGEX)
: undefined;
/**
* Parse denied actions from environment variable
* Format: "tool_name:action,tool_name:action,..."
* Example: "manage_milestone:delete,manage_milestone:promote,browse_events:user"
* @returns Map of tool name to Set of denied action names
*/
function parseDeniedActions(envValue?: string): Map<string, Set<string>> {
const deniedActions = new Map<string, Set<string>>();
if (!envValue) {
return deniedActions;
}
const pairs = envValue
.split(",")
.map(s => s.trim())
.filter(Boolean);
for (const pair of pairs) {
const colonIndex = pair.indexOf(":");
if (colonIndex === -1) {
// Invalid format, skip
continue;
}
const toolName = pair.substring(0, colonIndex).toLowerCase();
const actionName = pair.substring(colonIndex + 1).toLowerCase();
if (!toolName || !actionName) {
continue;
}
let actionSet = deniedActions.get(toolName);
if (!actionSet) {
actionSet = new Set();
deniedActions.set(toolName, actionSet);
}
actionSet.add(actionName);
}
return deniedActions;
}
export const GITLAB_DENIED_ACTIONS = parseDeniedActions(process.env.GITLAB_DENIED_ACTIONS);
// Logging format configuration - type imported from logging module to avoid duplication
// - 'condensed' (default): Single-line access log per request with stack aggregation
// - 'verbose': Traditional multi-line logging (existing behavior)
import type { LogFormat } from "./logging/types.js";
function parseLogFormat(value?: string): LogFormat {
const format = value?.toLowerCase();
if (format === "verbose") {
return "verbose";
}
return "condensed"; // Default - single-line condensed access logs
}
export const LOG_FORMAT: LogFormat = parseLogFormat(process.env.LOG_FORMAT);
// Re-export LogFormat type for consumers of config module
export type { LogFormat };
/**
* Schema for a single log filter rule.
* A request is skipped from access logging if ALL specified conditions match.
*/
const LogFilterRuleSchema = z
.object({
method: z
.string()
.optional()
.describe("HTTP method to match (exact, case-insensitive). If omitted, matches any method."),
path: z
.string()
.optional()
.describe(
"Request path to match. Exact match, or prefix match if ends with '*'. If omitted, matches any path."
),
userAgent: z
.string()
.optional()
.describe(
"Substring to match in User-Agent header (case-insensitive). If omitted, matches any User-Agent."
),
})
.describe("Filter rule for skipping access log entries. All specified conditions must match.");
/**
* Schema for LOG_FILTER environment variable.
* JSON array of filter rules.
*/
const LogFilterSchema = z.array(LogFilterRuleSchema).describe("Array of log filter rules");
/**
* Parsed log filter rule
*/
export interface LogFilterRule {
/** HTTP method (lowercase for comparison) */
method?: string;
/** Request path (exact match, or prefix if ends with *) */
path?: string;
/** Whether path uses prefix matching (ends with *) */
pathIsPrefix?: boolean;
/** User-Agent substring (lowercase for comparison) */
userAgent?: string;
}
/**
* Parse LOG_FILTER from environment variable
* @returns Array of parsed filter rules, empty array if not set or invalid
*/
function parseLogFilter(envValue?: string): LogFilterRule[] {
Iif (!envValue || envValue.trim() === "") {
return [];
}
try {
const parsed: unknown = JSON.parse(envValue);
const validated = LogFilterSchema.parse(parsed);
return validated.map(rule => {
const result: LogFilterRule = {};
if (rule.method) {
result.method = rule.method.toLowerCase();
}
if (rule.path) {
if (rule.path.endsWith("*")) {
result.path = rule.path.slice(0, -1); // Remove trailing *
result.pathIsPrefix = true;
} else {
result.path = rule.path;
result.pathIsPrefix = false;
}
}
if (rule.userAgent) {
result.userAgent = rule.userAgent.toLowerCase();
}
return result;
});
} catch (error) {
// Log warning at startup for invalid JSON/schema
console.warn(
`[gitlab-mcp] Invalid LOG_FILTER format, logging all requests. Error: ${error instanceof Error ? error.message : String(error)}`
);
return [];
}
}
/**
* Default log filter rules - skip Claude Code polling requests.
* Claude Code polls GET / every second to check MCP server availability.
*/
const DEFAULT_LOG_FILTER: LogFilterRule[] = [
{ method: "get", path: "/", pathIsPrefix: false, userAgent: "claude-code" },
];
/**
* Parsed log filter rules from LOG_FILTER environment variable.
* Defaults to filtering Claude Code polling (GET / with claude-code user agent).
* Set to empty array '[]' to log all requests.
* Whitespace-only or unset LOG_FILTER uses the default filter.
*/
export const LOG_FILTER: LogFilterRule[] = process.env.LOG_FILTER?.trim()
? parseLogFilter(process.env.LOG_FILTER)
: DEFAULT_LOG_FILTER;
/**
* Check if a request should be skipped from access logging.
* A request is skipped if it matches ANY of the filter rules.
* Within a rule, ALL specified conditions must match.
*
* @param method - HTTP method (e.g., "GET", "POST")
* @param path - Request path (e.g., "/", "/health")
* @param userAgent - User-Agent header value (may be undefined)
* @returns true if request should be skipped from logging
*/
export function shouldSkipAccessLog(method: string, path: string, userAgent?: string): boolean {
if (LOG_FILTER.length === 0) {
return false;
}
const methodLower = method.toLowerCase();
const userAgentLower = userAgent?.toLowerCase() ?? "";
return LOG_FILTER.some(rule => {
// Check method (if specified)
if (rule.method && rule.method !== methodLower) {
return false;
}
// Check path (if specified)
if (rule.path !== undefined) {
if (rule.pathIsPrefix) {
if (!path.startsWith(rule.path)) {
return false;
}
} else {
if (path !== rule.path) {
return false;
}
}
}
// Check User-Agent (if specified) - substring match
if (rule.userAgent && !userAgentLower.includes(rule.userAgent)) {
return false;
}
// All specified conditions matched
return true;
});
}
/**
* Check if a request should be skipped from access logging (Express request overload).
* Convenience function that extracts method, path, and User-Agent from Express request.
*
* @param req - Express request object
* @returns true if request should be skipped from logging
*/
export function shouldSkipAccessLogRequest(req: Request): boolean {
return shouldSkipAccessLog(req.method, req.path, req.headers["user-agent"]);
}
// Schema mode configuration
// - 'flat' (default): Flatten discriminated unions for AI clients that don't support oneOf well
// - 'discriminated': Keep oneOf structure for clients that properly support JSON Schema
// - 'auto': Detect schema mode from clientInfo during MCP initialize
// NOTE: 'auto' is only reliable for stdio mode (single client). For HTTP/SSE with multiple
// concurrent sessions, use explicit 'flat' or 'discriminated' mode instead.
export type SchemaMode = "flat" | "discriminated" | "auto";
function parseSchemaMode(value?: string): SchemaMode {
const mode = value?.toLowerCase();
if (mode === "discriminated") {
return "discriminated";
}
if (mode === "auto") {
return "auto";
}
return "flat"; // Default - best compatibility with current AI clients
}
export const GITLAB_SCHEMA_MODE: SchemaMode = parseSchemaMode(process.env.GITLAB_SCHEMA_MODE);
/**
* Detect effective schema mode based on clientInfo from MCP initialize
* Called during initialize to determine per-session schema mode when GITLAB_SCHEMA_MODE=auto
*
* NOTE: This detection is only reliable for stdio mode (single client per server instance).
* For HTTP/SSE modes with multiple concurrent sessions, use explicit GITLAB_SCHEMA_MODE instead.
*
* @param clientName - Client name from clientInfo (e.g., "claude-code", "mcp-inspector")
* @returns Effective schema mode for this client
*/
export function detectSchemaMode(clientName?: string): "flat" | "discriminated" {
const name = clientName?.toLowerCase() ?? "";
// Known clients that need flat schemas (don't support oneOf well)
// Use exact match or prefix to avoid false positives (e.g., "my-claude-wrapper")
if (
name === "claude" ||
name.startsWith("claude-") ||
name === "cursor" ||
name.startsWith("cursor-")
) {
return "flat";
}
// Known clients that support discriminated unions
// Use same pattern as above: exact match or dash-prefix
if (
name === "inspector" ||
name.startsWith("inspector-") ||
name === "mcp-inspector" ||
name.startsWith("mcp-inspector-")
) {
return "discriminated";
}
// Safe default for unknown clients
return "flat";
}
export const USE_GITLAB_WIKI = process.env.USE_GITLAB_WIKI !== "false";
export const USE_MILESTONE = process.env.USE_MILESTONE !== "false";
export const USE_PIPELINE = process.env.USE_PIPELINE !== "false";
export const USE_WORKITEMS = process.env.USE_WORKITEMS !== "false";
export const USE_LABELS = process.env.USE_LABELS !== "false";
export const USE_MRS = process.env.USE_MRS !== "false";
export const USE_FILES = process.env.USE_FILES !== "false";
export const USE_VARIABLES = process.env.USE_VARIABLES !== "false";
export const USE_SNIPPETS = process.env.USE_SNIPPETS !== "false";
export const USE_WEBHOOKS = process.env.USE_WEBHOOKS !== "false";
export const USE_INTEGRATIONS = process.env.USE_INTEGRATIONS !== "false";
export const USE_RELEASES = process.env.USE_RELEASES !== "false";
export const USE_REFS = process.env.USE_REFS !== "false";
export const USE_MEMBERS = process.env.USE_MEMBERS !== "false";
export const USE_SEARCH = process.env.USE_SEARCH !== "false";
export const USE_ITERATIONS = process.env.USE_ITERATIONS !== "false";
export const HOST = process.env.HOST ?? "0.0.0.0";
export const PORT = process.env.PORT ?? 3002;
// TLS/SSL configuration for direct HTTPS termination
export const SSL_CERT_PATH = process.env.SSL_CERT_PATH;
export const SSL_KEY_PATH = process.env.SSL_KEY_PATH;
export const SSL_CA_PATH = process.env.SSL_CA_PATH;
export const SSL_PASSPHRASE = process.env.SSL_PASSPHRASE;
// Reverse proxy configuration
// Values: 'true', 'false', 'loopback', 'linklocal', 'uniquelocal', or specific IPs
export const TRUST_PROXY = process.env.TRUST_PROXY;
// SSE heartbeat interval (in milliseconds)
// Sends `: ping\n\n` comments to keep SSE connections alive through proxies (Cloudflare, Envoy, etc.)
// Default 30s — well under Cloudflare's ~100-125s idle timeout
const parsedHeartbeatMs = parseInt(process.env.GITLAB_SSE_HEARTBEAT_MS ?? "30000", 10);
export const SSE_HEARTBEAT_MS =
Number.isFinite(parsedHeartbeatMs) && parsedHeartbeatMs > 0 ? parsedHeartbeatMs : 30000;
// HTTP server keepalive timeout (in milliseconds)
// Must be higher than any upstream proxy timeout (Cloudflare max is 600s for Enterprise)
// Default 620s ensures the Node.js server doesn't close connections before the proxy does
const parsedKeepAliveTimeout = parseInt(
process.env.GITLAB_HTTP_KEEPALIVE_TIMEOUT_MS ?? "620000",
10
);
export const HTTP_KEEPALIVE_TIMEOUT_MS =
Number.isFinite(parsedKeepAliveTimeout) && parsedKeepAliveTimeout > 0
? parsedKeepAliveTimeout
: 620000;
// API timeout configuration (in milliseconds)
// Default 10s allows time for retries within a reasonable total response time
const parsedTimeoutMs = parseInt(process.env.GITLAB_API_TIMEOUT_MS ?? "10000", 10);
export const API_TIMEOUT_MS =
Number.isFinite(parsedTimeoutMs) && parsedTimeoutMs > 0 ? parsedTimeoutMs : 10000;
// Retry configuration for idempotent operations (GET/HEAD/OPTIONS requests by default)
// Retries on: timeouts, network errors, 5xx server errors, 429 rate limits
export const API_RETRY_ENABLED = process.env.GITLAB_API_RETRY_ENABLED !== "false";
const parsedMaxAttempts = parseInt(process.env.GITLAB_API_RETRY_MAX_ATTEMPTS ?? "3", 10);
export const API_RETRY_MAX_ATTEMPTS =
Number.isFinite(parsedMaxAttempts) && parsedMaxAttempts >= 0 ? parsedMaxAttempts : 3;
const parsedBaseDelay = parseInt(process.env.GITLAB_API_RETRY_BASE_DELAY_MS ?? "1000", 10);
export const API_RETRY_BASE_DELAY_MS =
Number.isFinite(parsedBaseDelay) && parsedBaseDelay > 0 ? parsedBaseDelay : 1000;
const parsedMaxDelay = parseInt(process.env.GITLAB_API_RETRY_MAX_DELAY_MS ?? "4000", 10);
export const API_RETRY_MAX_DELAY_MS =
Number.isFinite(parsedMaxDelay) && parsedMaxDelay > 0 ? parsedMaxDelay : 4000;
// Rate limiting configuration
// Per-IP rate limiting (for anonymous requests) - enabled by default
export const RATE_LIMIT_IP_ENABLED = process.env.RATE_LIMIT_IP_ENABLED !== "false";
export const RATE_LIMIT_IP_WINDOW_MS = parseInt(process.env.RATE_LIMIT_IP_WINDOW_MS ?? "60000", 10); // 1 minute
export const RATE_LIMIT_IP_MAX_REQUESTS = parseInt(
process.env.RATE_LIMIT_IP_MAX_REQUESTS ?? "100",
10
);
// Per-session rate limiting (for authenticated requests) - disabled by default
export const RATE_LIMIT_SESSION_ENABLED = process.env.RATE_LIMIT_SESSION_ENABLED === "true";
export const RATE_LIMIT_SESSION_WINDOW_MS = parseInt(
process.env.RATE_LIMIT_SESSION_WINDOW_MS ?? "60000",
10
);
export const RATE_LIMIT_SESSION_MAX_REQUESTS = parseInt(
process.env.RATE_LIMIT_SESSION_MAX_REQUESTS ?? "300",
10
);
// Transport mode selection:
// - If PORT env var is present: HTTP mode with dual transport (SSE + StreamableHTTP)
// - If no PORT env var: stdio mode for direct MCP communication
// TLS/SSL configuration
export const SKIP_TLS_VERIFY = process.env.SKIP_TLS_VERIFY === "true";
// Dashboard configuration
// When enabled, GET / returns health dashboard (HTML or JSON based on Accept header)
// When disabled, GET / is handled by MCP StreamableHTTP transport
export const DASHBOARD_ENABLED = process.env.DASHBOARD_ENABLED !== "false";
// Proxy configuration
export const HTTP_PROXY = process.env.HTTP_PROXY;
export const HTTPS_PROXY = process.env.HTTPS_PROXY;
export const NODE_TLS_REJECT_UNAUTHORIZED = process.env.NODE_TLS_REJECT_UNAUTHORIZED;
export const GITLAB_CA_CERT_PATH = process.env.GITLAB_CA_CERT_PATH;
// GitLab base URL configuration (without /api/v4)
function normalizeGitLabBaseUrl(url?: string): string {
if (!url) {
return "https://gitlab.com";
}
if (url.endsWith("/")) {
url = url.slice(0, -1);
}
// Remove /api/v4 if user accidentally added it
if (url.endsWith("/api/v4")) {
url = url.slice(0, -7);
}
return url;
}
export const GITLAB_BASE_URL = normalizeGitLabBaseUrl(process.env.GITLAB_API_URL ?? "");
export const GITLAB_API_URL = `${GITLAB_BASE_URL}/api/v4`;
export const GITLAB_PROJECT_ID = process.env.GITLAB_PROJECT_ID;
export const GITLAB_ALLOWED_PROJECT_IDS =
process.env.GITLAB_ALLOWED_PROJECT_IDS?.split(",").map(id => id.trim()) ?? [];
export function getEffectiveProjectId(projectId: string): string {
if (GITLAB_PROJECT_ID) {
return GITLAB_PROJECT_ID;
}
if (GITLAB_ALLOWED_PROJECT_IDS.length > 0) {
if (!GITLAB_ALLOWED_PROJECT_IDS.includes(projectId)) {
throw new Error(
`Project ID ${projectId} is not allowed. Allowed project IDs: ${GITLAB_ALLOWED_PROJECT_IDS.join(", ")}`
);
}
}
return projectId;
}
// Package info
let packageName = "gitlab-mcp";
let packageVersion = "unknown";
try {
const packageInfo = JSON.parse(fs.readFileSync(packageJsonPath, "utf8")) as {
name?: string;
version?: string;
};
packageName = packageInfo.name ?? packageName;
packageVersion = packageInfo.version ?? packageVersion;
} catch {
// Ignore errors when reading package.json
}
export { packageName, packageVersion };
/**
* Parse tool description overrides from environment variables
* Environment variables should follow the pattern: GITLAB_TOOL_{TOOL_NAME}="Custom description"
* @returns Map of tool name to custom description
*/
export function getToolDescriptionOverrides(): Map<string, string> {
const overrides = new Map<string, string>();
const prefix = "GITLAB_TOOL_";
// Scan all environment variables for tool description overrides
for (const [key, value] of Object.entries(process.env)) {
if (key.startsWith(prefix) && value) {
// Extract tool name from environment variable
// Convert from GITLAB_TOOL_LIST_PROJECTS to list_projects
const toolName = key.substring(prefix.length).toLowerCase();
overrides.set(toolName, value);
}
}
return overrides;
}
/**
* Parse action description overrides from environment variables
* Environment variables should follow the pattern: GITLAB_ACTION_{TOOL}_{ACTION}="Custom description"
* Example: GITLAB_ACTION_MANAGE_MILESTONE_DELETE="Remove a milestone permanently"
* @returns Map of "tool:action" to custom description
*/
export function getActionDescriptionOverrides(): Map<string, string> {
const overrides = new Map<string, string>();
const prefix = "GITLAB_ACTION_";
for (const [key, value] of Object.entries(process.env)) {
if (key.startsWith(prefix) && value) {
// Extract tool and action from environment variable
// GITLAB_ACTION_MANAGE_MILESTONE_DELETE -> manage_milestone:delete
const rest = key.substring(prefix.length).toLowerCase();
// Find the last underscore to split tool from action
// This handles tool names with underscores (e.g., manage_milestone)
const lastUnderscoreIndex = rest.lastIndexOf("_");
if (lastUnderscoreIndex === -1) {
continue;
}
const toolName = rest.substring(0, lastUnderscoreIndex);
const actionName = rest.substring(lastUnderscoreIndex + 1);
if (!toolName || !actionName) {
continue;
}
overrides.set(`${toolName}:${actionName}`, value);
}
}
return overrides;
}
/**
* Parse parameter description overrides from environment variables
* Environment variables should follow the pattern: GITLAB_PARAM_{TOOL}_{PARAM}="Custom description"
* Example: GITLAB_PARAM_MANAGE_MILESTONE_TITLE="The milestone title (required for create)"
* @returns Map of "tool:param" to custom description
*/
export function getParamDescriptionOverrides(): Map<string, string> {
const overrides = new Map<string, string>();
const prefix = "GITLAB_PARAM_";
for (const [key, value] of Object.entries(process.env)) {
if (key.startsWith(prefix) && value) {
// Extract tool and param from environment variable
// GITLAB_PARAM_MANAGE_MILESTONE_TITLE -> manage_milestone:title
const rest = key.substring(prefix.length).toLowerCase();
// Find the last underscore to split tool from param
const lastUnderscoreIndex = rest.lastIndexOf("_");
if (lastUnderscoreIndex === -1) {
continue;
}
const toolName = rest.substring(0, lastUnderscoreIndex);
const paramName = rest.substring(lastUnderscoreIndex + 1);
if (!toolName || !paramName) {
continue;
}
overrides.set(`${toolName}:${paramName}`, value);
}
}
return overrides;
}
/**
* Check if a specific action is denied for a tool
* @param toolName - The tool name (e.g., "manage_milestone")
* @param actionName - The action name (e.g., "delete")
* @returns true if the action is denied
*/
export function isActionDenied(toolName: string, actionName: string): boolean {
const deniedActions = GITLAB_DENIED_ACTIONS.get(toolName.toLowerCase());
if (!deniedActions) {
return false;
}
return deniedActions.has(actionName.toLowerCase());
}
/**
* Get allowed actions for a tool by filtering out denied actions
* @param toolName - The tool name (e.g., "manage_milestone")
* @param allActions - Array of all possible actions
* @returns Array of allowed actions
*/
export function getAllowedActions(toolName: string, allActions: string[]): string[] {
const deniedActions = GITLAB_DENIED_ACTIONS.get(toolName.toLowerCase());
if (!deniedActions || deniedActions.size === 0) {
return allActions;
}
return allActions.filter(action => !deniedActions.has(action.toLowerCase()));
}
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