commit 18d0b333d26f7b36e9de91d2004eeac708ab7a0e Author: Luna Date: Thu Jul 16 20:16:05 2026 +0000 Initial service implementation diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..62ae429 --- /dev/null +++ b/.dockerignore @@ -0,0 +1,5 @@ +node_modules +dist +.git +.env +tmp diff --git a/.editorconfig b/.editorconfig new file mode 100644 index 0000000..1bc1adb --- /dev/null +++ b/.editorconfig @@ -0,0 +1,12 @@ +root = true + +[*.{js,ts,json,yml,yaml,md,sh}] +charset = utf-8 +end_of_line = lf +indent_style = space +indent_size = 2 +insert_final_newline = true +trim_trailing_whitespace = true + +[Makefile] +indent_style = tab diff --git a/.env.example b/.env.example new file mode 100644 index 0000000..a50b190 --- /dev/null +++ b/.env.example @@ -0,0 +1,13 @@ +PORT=3000 +API_KEY= +CACHE_TTL_MINUTES=5 +CACHE_SWEEP_INTERVAL_MINUTES=5 +RATE_LIMIT_WINDOW_MINUTES=5 +RATE_LIMIT_MAX=30 +MAX_CONCURRENT_SCANS=4 +CLONE_TIMEOUT_SECONDS=45 +DEFAULT_SSH_KEY_NAME=loc_via_git_ed25519 +GENERATE_SSH_KEY_IF_MISSING=false +TRUST_PROXY=false +SSH_KEYS_DIR=/app/keys +TMP_DIR=/tmp/loc-via-git diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml new file mode 100644 index 0000000..763f99e --- /dev/null +++ b/.gitea/workflows/ci.yml @@ -0,0 +1,29 @@ +name: ci + +on: + push: + branches: + - main + pull_request: + +jobs: + test: + runs-on: ubuntu-latest + steps: + - name: Checkout + uses: actions/checkout@v4 + + - name: Setup Node + uses: actions/setup-node@v4 + with: + node-version: 22 + cache: npm + + - name: Install dependencies + run: npm ci + + - name: Build + run: npm run build + + - name: Test + run: npm test diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..258b9aa --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +dist +node_modules +.env +tmp diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md new file mode 100644 index 0000000..73a3c4e --- /dev/null +++ b/CONTRIBUTING.md @@ -0,0 +1,28 @@ +# Contributing + +## Setup + +1. Copy `.env.example` to `.env`. +2. Install dependencies with `npm install`. +3. Start the app with `npm run dev` or `docker compose up --build`. + +## Before opening changes + +Run: + +```bash +npm run build +npm test +``` + +If you are touching the running service flow, also run: + +```bash +npm run smoke +``` + +## Notes + +- Keep the code modular. Avoid adding unrelated logic into a single file. +- Preserve the cleanup guarantees around temporary clone directories. +- Do not commit private SSH keys. diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..4029cde --- /dev/null +++ b/Dockerfile @@ -0,0 +1,30 @@ +FROM node:22-bookworm-slim AS build + +WORKDIR /app + +RUN apt-get update \ + && apt-get install -y --no-install-recommends git openssh-client ca-certificates \ + && rm -rf /var/lib/apt/lists/* + +COPY package.json package-lock.json* tsconfig.json ./ +RUN npm ci + +COPY src ./src +RUN npm run build + +FROM node:22-bookworm-slim + +WORKDIR /app + +RUN apt-get update \ + && apt-get install -y --no-install-recommends git openssh-client ca-certificates \ + && rm -rf /var/lib/apt/lists/* + +COPY package.json package-lock.json* ./ +RUN npm ci --omit=dev + +COPY --from=build /app/dist ./dist + +EXPOSE 3000 + +CMD ["npm", "start"] diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..14fac91 --- /dev/null +++ b/LICENSE @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2026 + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..f2a0ae1 --- /dev/null +++ b/Makefile @@ -0,0 +1,27 @@ +PORT ?= 3000 + +.PHONY: install build dev start smoke docker-build docker-up docker-down + +install: + npm install + +build: + npm run build + +dev: + npm run dev + +start: + npm start + +smoke: + npm run smoke + +docker-build: + docker compose build + +docker-up: + docker compose up -d + +docker-down: + docker compose down diff --git a/README.md b/README.md new file mode 100644 index 0000000..bad62e1 --- /dev/null +++ b/README.md @@ -0,0 +1,110 @@ +# loc-via-git + +Tiny API that clones a Git repo and counts its non-empty lines of code. + +## Features + +- Plain text and JSON endpoints +- Optional API key enforcement +- Per-repo in-memory caching +- Extension-based language breakdown +- Basic rate limiting +- Bounded concurrent scans so the host does not get hammered +- SSH key file support for private repos +- Docker Compose deployment + +## Endpoints + +- `GET /loc.txt?repo=&ssh_key=&ref=` + - Returns the line count as plain text. +- `GET /loc?repo=&ssh_key=&ref=` + - Returns JSON metadata, including a language breakdown by files and non-empty lines. +- `GET /health` + - Health plus queue/cache stats. + +## Auth + +No auth by default. If `API_KEY` is set, send it as either: + +- `x-api-key: ...` +- `Authorization: Bearer ...` + +## SSH keys + +SSH keys live inside the Docker volume mounted at `/app/keys`, not in the repo or a host bind mount. + +You have two options: + +- Provide a key pair yourself inside the `ssh_keys` Docker volume +- Let the service generate the default key by setting `GENERATE_SSH_KEY_IF_MISSING=true` + +Example: + +```bash +curl "http://localhost:3000/loc?repo=ssh://git@example.com/org/repo.git&ssh_key=loc_via_git_ed25519" +``` + +Fetch the public key to add it on the Git host: + +```bash +curl http://localhost:3000/ssh/public-key +``` + +You can also request a specific key: + +```bash +curl "http://localhost:3000/ssh/public-key?ssh_key=loc_via_git_ed25519" +``` + +## Cleanup and caching + +- Every clone happens in a temporary directory and is deleted in a `finally` block after the scan finishes or fails. +- The service also sweeps stale temp directories in case a process dies mid-scan. +- Cache entries live in memory only and expire after `CACHE_TTL_MINUTES`. + +## Configuration + +Copy `.env.example` to `.env` and adjust: + +```env +PORT=3000 +API_KEY= +CACHE_TTL_MINUTES=5 +CACHE_SWEEP_INTERVAL_MINUTES=5 +RATE_LIMIT_WINDOW_MINUTES=5 +RATE_LIMIT_MAX=30 +MAX_CONCURRENT_SCANS=4 +CLONE_TIMEOUT_SECONDS=45 +DEFAULT_SSH_KEY_NAME=loc_via_git_ed25519 +GENERATE_SSH_KEY_IF_MISSING=false +TRUST_PROXY=false +SSH_KEYS_DIR=/app/keys +TMP_DIR=/tmp/loc-via-git +``` + +## Local run + +```bash +npm install +npm run build +npm start +``` + +## Docker compose + +```bash +docker compose up --build +``` + +To copy an existing key pair into the Docker volume: + +```bash +docker cp ./id_ed25519 loc-via-git-api-1:/app/keys/loc_via_git_ed25519 +docker cp ./id_ed25519.pub loc-via-git-api-1:/app/keys/loc_via_git_ed25519.pub +``` + +## Smoke test + +```bash +npm run smoke +``` diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 0000000..3bb845d --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,35 @@ +services: + api: + build: . + env_file: + - .env + healthcheck: + test: ["CMD", "node", "-e", "fetch('http://127.0.0.1:3000/health').then((r) => { if (!r.ok) process.exit(1); }).catch(() => process.exit(1))"] + interval: 30s + timeout: 5s + retries: 3 + start_period: 10s + ports: + - "${PORT:-3000}:3000" + environment: + PORT: 3000 + API_KEY: ${API_KEY:-} + CACHE_TTL_MINUTES: ${CACHE_TTL_MINUTES:-5} + CACHE_SWEEP_INTERVAL_MINUTES: ${CACHE_SWEEP_INTERVAL_MINUTES:-5} + RATE_LIMIT_WINDOW_MINUTES: ${RATE_LIMIT_WINDOW_MINUTES:-5} + RATE_LIMIT_MAX: ${RATE_LIMIT_MAX:-30} + MAX_CONCURRENT_SCANS: ${MAX_CONCURRENT_SCANS:-4} + CLONE_TIMEOUT_SECONDS: ${CLONE_TIMEOUT_SECONDS:-45} + DEFAULT_SSH_KEY_NAME: ${DEFAULT_SSH_KEY_NAME:-loc_via_git_ed25519} + GENERATE_SSH_KEY_IF_MISSING: ${GENERATE_SSH_KEY_IF_MISSING:-false} + TRUST_PROXY: ${TRUST_PROXY:-false} + SSH_KEYS_DIR: /app/keys + TMP_DIR: /tmp/loc-via-git + volumes: + - ssh_keys:/app/keys + tmpfs: + - 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'tests/**/*.test.js'" + }, + "dependencies": { + "express": "^4.21.2", + "express-rate-limit": "^7.4.1" + }, + "devDependencies": { + "@types/express": "^5.0.3", + "@types/node": "^24.0.15", + "supertest": "^7.1.1", + "tsx": "^4.20.3", + "typescript": "^5.9.2" + } +} diff --git a/src/app.ts b/src/app.ts new file mode 100644 index 0000000..1ec3745 --- /dev/null +++ b/src/app.ts @@ -0,0 +1,84 @@ +import express, { type NextFunction, type Request, type Response } from "express"; +import rateLimit from "express-rate-limit"; + +import type { RuntimeConfig } from "./config.js"; +import { HttpError } from "./errors.js"; +import { asyncHandler, readOptionalString } from "./lib/http.js"; +import type { CountRequest } from "./types.js"; + +type AppDependencies = { + getHealth: () => Record; + getPublicKey: (name: string | null) => Promise; + getDefaultKeyName: () => string; + count: (request: CountRequest) => Promise; +}; + +export function createApp(config: RuntimeConfig, deps: AppDependencies) { + const app = express(); + app.set("trust proxy", config.trustProxy); + + app.use(rateLimit({ + windowMs: config.rateLimitWindowMs, + limit: config.rateLimitMax, + standardHeaders: true, + legacyHeaders: false + })); + + app.get("/health", (_req, res) => { + res.json({ ok: true, ...deps.getHealth() }); + }); + + app.get("/ssh/public-key", asyncHandler(async (req, res) => { + const keyName = readOptionalString(req.query.ssh_key) ?? deps.getDefaultKeyName(); + const publicKey = await deps.getPublicKey(keyName); + res.type("text/plain").send(publicKey); + })); + + app.use((req, res, next) => { + if (!config.apiKey || req.path === "/ssh/public-key") { + next(); + return; + } + + const headerKey = req.header("x-api-key"); + const bearer = req.header("authorization")?.replace(/^Bearer\s+/i, "").trim(); + + if (headerKey === config.apiKey || bearer === config.apiKey) { + next(); + return; + } + + res.status(401).json({ error: "Unauthorized" }); + }); + + app.get("/loc.txt", asyncHandler(async (req, res) => { + const result = await deps.count(readCountRequest(req)); + res.type("text/plain").send(String(result.lineCount)); + })); + + app.get("/loc", asyncHandler(async (req, res) => { + const result = await deps.count(readCountRequest(req)); + res.json(result); + })); + + app.use((error: unknown, _req: Request, res: Response, _next: NextFunction) => { + const message = error instanceof Error ? error.message : "Unknown error"; + const status = error instanceof HttpError ? error.statusCode : message.startsWith("Missing ") ? 400 : 500; + res.status(status).json({ error: message }); + }); + + return app; +} + +function readCountRequest(req: Request): CountRequest { + const repo = typeof req.query.repo === "string" ? req.query.repo.trim() : ""; + if (!repo) { + throw new HttpError(400, "Missing repo query parameter"); + } + + return { + repo, + ref: readOptionalString(req.query.ref), + sshKey: readOptionalString(req.query.ssh_key) + }; +} diff --git a/src/config.ts b/src/config.ts new file mode 100644 index 0000000..00607aa --- /dev/null +++ b/src/config.ts @@ -0,0 +1,97 @@ +import path from "node:path"; +import { tmpdir } from "node:os"; + +export type RuntimeConfig = { + apiKey: string; + cacheSweepIntervalMs: number; + cacheTtlMs: number; + cloneTimeoutMs: number; + defaultSshKeyName: string; + generateSshKeyIfMissing: boolean; + maxConcurrentScans: number; + port: number; + rateLimitMax: number; + rateLimitWindowMs: number; + sshKeysDir: string; + tempRoot: string; + trustProxy: boolean | number | string; +}; + +export function loadConfig(): RuntimeConfig { + return { + apiKey: readEnvString("API_KEY", ""), + cacheSweepIntervalMs: readEnvMinutes("CACHE_SWEEP_INTERVAL_MINUTES", 5), + cacheTtlMs: readEnvMinutes("CACHE_TTL_MINUTES", 5), + cloneTimeoutMs: readEnvSeconds("CLONE_TIMEOUT_SECONDS", 45), + defaultSshKeyName: readEnvString("DEFAULT_SSH_KEY_NAME", "loc_via_git_ed25519"), + generateSshKeyIfMissing: readEnvBoolean("GENERATE_SSH_KEY_IF_MISSING", false), + maxConcurrentScans: readEnvNumber("MAX_CONCURRENT_SCANS", 4), + port: readEnvNumber("PORT", 3000), + rateLimitMax: readEnvNumber("RATE_LIMIT_MAX", 30), + rateLimitWindowMs: readEnvMinutes("RATE_LIMIT_WINDOW_MINUTES", 5), + sshKeysDir: readEnvString("SSH_KEYS_DIR", path.resolve(process.cwd(), "keys")), + tempRoot: readEnvString("TMP_DIR", path.join(tmpdir(), "loc-via-git")), + trustProxy: readEnvTrustProxy("TRUST_PROXY", false) + }; +} + +function readEnvMinutes(name: string, fallback: number): number { + return readEnvNumber(name, fallback) * 60_000; +} + +function readEnvSeconds(name: string, fallback: number): number { + return readEnvNumber(name, fallback) * 1000; +} + +function readEnvNumber(name: string, fallback: number): number { + const raw = process.env[name]?.trim(); + if (!raw) { + return fallback; + } + + const parsed = Number(raw); + if (!Number.isFinite(parsed) || parsed <= 0) { + throw new Error(`Invalid ${name}: ${raw}`); + } + + return parsed; +} + +function readEnvBoolean(name: string, fallback: boolean): boolean { + const raw = process.env[name]?.trim().toLowerCase(); + if (!raw) { + return fallback; + } + + if (["1", "true", "yes", "on"].includes(raw)) { + return true; + } + + if (["0", "false", "no", "off"].includes(raw)) { + return false; + } + + throw new Error(`Invalid ${name}: ${raw}`); +} + +function readEnvTrustProxy(name: string, fallback: boolean | number | string): boolean | number | string { + const raw = process.env[name]?.trim(); + if (!raw) { + return fallback; + } + + if (["true", "false", "1", "0", "yes", "no", "on", "off"].includes(raw.toLowerCase())) { + return readEnvBoolean(name, Boolean(fallback)); + } + + const asNumber = Number(raw); + if (Number.isInteger(asNumber) && asNumber >= 0) { + return asNumber; + } + + return raw; +} + +function readEnvString(name: string, fallback: string): string { + return process.env[name]?.trim() ?? fallback; +} diff --git a/src/errors.ts b/src/errors.ts new file mode 100644 index 0000000..ab045ad --- /dev/null +++ b/src/errors.ts @@ -0,0 +1,8 @@ +export class HttpError extends Error { + constructor( + public readonly statusCode: number, + message: string + ) { + super(message); + } +} diff --git a/src/language.ts b/src/language.ts new file mode 100644 index 0000000..82237f9 --- /dev/null +++ b/src/language.ts @@ -0,0 +1,54 @@ +import path from "node:path"; + +const extensionToLanguage: Record = { + ".c": "C", + ".cc": "C++", + ".cpp": "C++", + ".cs": "C#", + ".css": "CSS", + ".go": "Go", + ".h": "C/C++ Header", + ".hpp": "C++ Header", + ".html": "HTML", + ".java": "Java", + ".js": "JavaScript", + ".json": "JSON", + ".jsx": "JavaScript React", + ".kt": "Kotlin", + ".lua": "Lua", + ".md": "Markdown", + ".mjs": "JavaScript", + ".php": "PHP", + ".py": "Python", + ".rb": "Ruby", + ".rs": "Rust", + ".scss": "SCSS", + ".sh": "Shell", + ".sql": "SQL", + ".svg": "SVG", + ".svelte": "Svelte", + ".swift": "Swift", + ".toml": "TOML", + ".ts": "TypeScript", + ".tsx": "TypeScript React", + ".txt": "Plain Text", + ".vue": "Vue", + ".xml": "XML", + ".yaml": "YAML", + ".yml": "YAML" +}; + +export function detectLanguage(filePath: string): string { + const fileName = path.basename(filePath).toLowerCase(); + const extension = path.extname(fileName); + + if (fileName === "dockerfile") { + return "Dockerfile"; + } + + if (fileName.endsWith(".d.ts")) { + return "TypeScript"; + } + + return extensionToLanguage[extension] ?? "Plain Text"; +} diff --git a/src/lib/http.ts b/src/lib/http.ts new file mode 100644 index 0000000..118829c --- /dev/null +++ b/src/lib/http.ts @@ -0,0 +1,16 @@ +import type { NextFunction, Request, Response } from "express"; + +export function asyncHandler(handler: (req: Request, res: Response) => Promise) { + return (req: Request, res: Response, next: NextFunction) => { + void handler(req, res).catch(next); + }; +} + +export function readOptionalString(value: unknown): string | null { + if (typeof value !== "string") { + return null; + } + + const trimmed = value.trim(); + return trimmed === "" ? null : trimmed; +} diff --git a/src/lib/semaphore.ts b/src/lib/semaphore.ts new file mode 100644 index 0000000..82fa38f --- /dev/null +++ b/src/lib/semaphore.ts @@ -0,0 +1,44 @@ +export class Semaphore { + private current = 0; + private readonly waiting: Array<() => void> = []; + + constructor(private readonly limit: number) {} + + get active(): number { + return this.current; + } + + get queued(): number { + return this.waiting.length; + } + + async use(task: () => Promise): Promise { + await this.acquire(); + + try { + return await task(); + } finally { + this.release(); + } + } + + private async acquire(): Promise { + if (this.current < this.limit) { + this.current += 1; + return; + } + + await new Promise((resolve) => { + this.waiting.push(() => { + this.current += 1; + resolve(); + }); + }); + } + + private release(): void { + this.current -= 1; + const next = this.waiting.shift(); + next?.(); + } +} diff --git a/src/server.ts b/src/server.ts new file mode 100644 index 0000000..d97b04a --- /dev/null +++ b/src/server.ts @@ -0,0 +1,22 @@ +import { loadConfig } from "./config.js"; +import { createApp } from "./app.js"; +import { KeyManager } from "./services/key-manager.js"; +import { RepoCounterService } from "./services/repo-counter.js"; + +const config = loadConfig(); +const keyManager = new KeyManager(config); +const repoCounter = new RepoCounterService(config, keyManager); + +await keyManager.initialize(); +await repoCounter.initialize(); + +const app = createApp(config, { + getHealth: () => repoCounter.getHealth(), + getPublicKey: (name) => keyManager.getPublicKey(name), + getDefaultKeyName: () => keyManager.getDefaultKeyName(), + count: (request) => repoCounter.count(request) +}); + +app.listen(config.port, () => { + console.log(`loc-via-git listening on ${config.port}`); +}); diff --git a/src/services/key-manager.ts b/src/services/key-manager.ts new file mode 100644 index 0000000..06683e5 --- /dev/null +++ b/src/services/key-manager.ts @@ -0,0 +1,118 @@ +import { spawn } from "node:child_process"; +import { mkdir, readFile, stat } from "node:fs/promises"; +import path from "node:path"; + +import type { RuntimeConfig } from "../config.js"; +import { HttpError } from "../errors.js"; + +export class KeyManager { + constructor(private readonly config: RuntimeConfig) {} + + async initialize(): Promise { + await mkdir(this.config.sshKeysDir, { recursive: true }); + + if (!this.config.generateSshKeyIfMissing) { + return; + } + + const privateKeyPath = this.getPrivateKeyPath(this.config.defaultSshKeyName); + const publicKeyPath = this.getPublicKeyPath(this.config.defaultSshKeyName); + const privateExists = await exists(privateKeyPath); + const publicExists = await exists(publicKeyPath); + + if (privateExists && publicExists) { + return; + } + + await runCommand("ssh-keygen", [ + "-t", "ed25519", + "-N", "", + "-f", privateKeyPath, + "-C", "loc-via-git" + ]); + } + + async resolvePrivateKeyPath(name: string | null): Promise { + const keyName = name ?? this.config.defaultSshKeyName; + if (!keyName) { + return null; + } + + this.assertValidKeyName(keyName); + + const keyPath = this.getPrivateKeyPath(keyName); + if (!(await exists(keyPath))) { + if (keyName === this.config.defaultSshKeyName && this.config.generateSshKeyIfMissing) { + await this.initialize(); + } + } + + if (!(await exists(keyPath))) { + throw new HttpError(400, "SSH key not found"); + } + + return keyPath; + } + + async getPublicKey(name: string | null): Promise { + const keyName = name ?? this.config.defaultSshKeyName; + this.assertValidKeyName(keyName); + + const keyPath = this.getPublicKeyPath(keyName); + if (!(await exists(keyPath))) { + if (keyName === this.config.defaultSshKeyName && this.config.generateSshKeyIfMissing) { + await this.initialize(); + } + } + + if (!(await exists(keyPath))) { + throw new HttpError(404, "Public key not found"); + } + + return (await readFile(keyPath, "utf8")).trim(); + } + + getDefaultKeyName(): string { + return this.config.defaultSshKeyName; + } + + private getPrivateKeyPath(name: string): string { + return path.join(this.config.sshKeysDir, name); + } + + private getPublicKeyPath(name: string): string { + return path.join(this.config.sshKeysDir, `${name}.pub`); + } + + private assertValidKeyName(name: string): void { + if (!/^[a-zA-Z0-9._-]+$/.test(name)) { + throw new HttpError(400, "Invalid ssh key filename"); + } + } +} + +async function exists(filePath: string): Promise { + const fileStats = await stat(filePath).catch(() => null); + return Boolean(fileStats?.isFile()); +} + +async function runCommand(command: string, args: string[]): Promise { + await new Promise((resolve, reject) => { + const child = spawn(command, args); + let stderr = ""; + + child.stderr.on("data", (chunk: Buffer | string) => { + stderr += chunk.toString(); + }); + + child.on("error", reject); + child.on("close", (code) => { + if (code === 0) { + resolve(); + return; + } + + reject(new Error(stderr.trim() || `${command} failed with code ${code}`)); + }); + }); +} diff --git a/src/services/repo-counter.ts b/src/services/repo-counter.ts new file mode 100644 index 0000000..7ffb35e --- /dev/null +++ b/src/services/repo-counter.ts @@ -0,0 +1,281 @@ +import { spawn } from "node:child_process"; +import { createReadStream } from "node:fs"; +import { mkdir, mkdtemp, readdir, readFile, rm, stat } from "node:fs/promises"; +import path from "node:path"; + +import type { RuntimeConfig } from "../config.js"; +import { HttpError } from "../errors.js"; +import { detectLanguage } from "../language.js"; +import { Semaphore } from "../lib/semaphore.js"; +import type { CountRequest, CountResult, LanguageStat } from "../types.js"; +import { KeyManager } from "./key-manager.js"; + +type CacheEntry = { + expiresAt: number; + value: Omit; +}; + +export class RepoCounterService { + private readonly cache = new Map(); + private readonly inFlight = new Map>>(); + private readonly semaphore: Semaphore; + + constructor( + private readonly config: RuntimeConfig, + private readonly keyManager: KeyManager + ) { + this.semaphore = new Semaphore(config.maxConcurrentScans); + } + + getHealth(): Record { + this.clearExpiredCache(); + + return { + cacheEntries: this.cache.size, + inFlight: this.inFlight.size, + maxConcurrentScans: this.config.maxConcurrentScans, + activeScans: this.semaphore.active, + queuedScans: this.semaphore.queued + }; + } + + async initialize(): Promise { + await mkdir(this.config.tempRoot, { recursive: true }); + await this.cleanupStaleTempDirs(); + + setInterval(() => { + this.clearExpiredCache(); + void this.cleanupStaleTempDirs(); + }, this.config.cacheSweepIntervalMs).unref(); + } + + async count(request: CountRequest): Promise { + const cacheKey = JSON.stringify(request); + this.clearExpiredCache(); + + const cached = this.cache.get(cacheKey); + if (cached && cached.expiresAt > Date.now()) { + return { ...cached.value, cached: true }; + } + + const active = this.inFlight.get(cacheKey); + if (active) { + const value = await active; + return { ...value, cached: false }; + } + + const task = this.semaphore.use(async () => { + const value = await this.cloneAndCount(request); + this.cache.set(cacheKey, { + value, + expiresAt: Date.now() + this.config.cacheTtlMs + }); + return value; + }); + + this.inFlight.set(cacheKey, task); + + try { + const value = await task; + return { ...value, cached: false }; + } finally { + this.inFlight.delete(cacheKey); + } + } + + private async cloneAndCount(request: CountRequest): Promise> { + const startedAt = Date.now(); + const repoDir = await mkdtemp(path.join(this.config.tempRoot, "repo-")); + + try { + await this.runGitClone(request.repo, repoDir, request.ref, request.sshKey); + const stats = await countDirectory(repoDir); + + return { + repo: request.repo, + ref: request.ref, + sshKey: request.sshKey, + lineCount: stats.lineCount, + fileCount: stats.fileCount, + languages: stats.languages, + scannedAt: new Date().toISOString(), + durationMs: Date.now() - startedAt + }; + } finally { + await rm(repoDir, { recursive: true, force: true }); + } + } + + private async runGitClone(repo: string, targetDir: string, ref: string | null, sshKey: string | null): Promise { + const env = { ...process.env }; + const keyPath = await this.keyManager.resolvePrivateKeyPath(sshKey); + + if (keyPath) { + env.GIT_SSH_COMMAND = `ssh -i "${keyPath}" -o IdentitiesOnly=yes -o StrictHostKeyChecking=accept-new`; + } + + await runCommand("git", ["clone", "--depth", "1", "--single-branch", repo, targetDir], env, this.config.cloneTimeoutMs); + + if (ref) { + await runCommand("git", ["-C", targetDir, "fetch", "--depth", "1", "origin", ref], env, this.config.cloneTimeoutMs); + await runCommand("git", ["-C", targetDir, "checkout", "FETCH_HEAD"], env, this.config.cloneTimeoutMs); + } + } + + private async cleanupStaleTempDirs(): Promise { + const entries = await readdir(this.config.tempRoot, { withFileTypes: true }).catch(() => []); + const staleBefore = Date.now() - this.config.cloneTimeoutMs * 2; + + for (const entry of entries) { + if (!entry.isDirectory() || !entry.name.startsWith("repo-")) { + continue; + } + + const fullPath = path.join(this.config.tempRoot, entry.name); + const entryStats = await stat(fullPath).catch(() => null); + if (!entryStats || entryStats.mtimeMs > staleBefore) { + continue; + } + + await rm(fullPath, { recursive: true, force: true }); + } + } + + private clearExpiredCache(): void { + const now = Date.now(); + for (const [key, entry] of this.cache.entries()) { + if (entry.expiresAt <= now) { + this.cache.delete(key); + } + } + } +} + +async function countDirectory(rootDir: string): Promise<{ + fileCount: number; + languages: LanguageStat[]; + lineCount: number; +}> { + let fileCount = 0; + let lineCount = 0; + const languages = new Map(); + const stack = [rootDir]; + + while (stack.length > 0) { + const currentDir = stack.pop(); + if (!currentDir) { + continue; + } + + const entries = await readdir(currentDir, { withFileTypes: true }); + for (const entry of entries) { + if (entry.name === ".git") { + continue; + } + + const fullPath = path.join(currentDir, entry.name); + if (entry.isDirectory()) { + stack.push(fullPath); + continue; + } + + if (!entry.isFile() || !(await isTextFile(fullPath))) { + continue; + } + + const lines = await countFileLines(fullPath); + const language = detectLanguage(fullPath); + const current = languages.get(language) ?? { language, files: 0, lines: 0 }; + + current.files += 1; + current.lines += lines; + languages.set(language, current); + + fileCount += 1; + lineCount += lines; + } + } + + return { + fileCount, + lineCount, + languages: Array.from(languages.values()).sort((a, b) => b.lines - a.lines || a.language.localeCompare(b.language)) + }; +} + +async function isTextFile(filePath: string): Promise { + const buffer = await readFile(filePath); + return !buffer.subarray(0, 4096).includes(0); +} + +async function countFileLines(filePath: string): Promise { + return new Promise((resolve, reject) => { + let count = 0; + let trailingChunk = ""; + const stream = createReadStream(filePath, { encoding: "utf8" }); + + stream.on("data", (chunk: string | Buffer) => { + const text = trailingChunk + chunk.toString(); + const lines = text.split(/\r?\n/); + trailingChunk = lines.pop() ?? ""; + + for (const line of lines) { + if (line.trim() !== "") { + count += 1; + } + } + }); + + stream.on("end", () => { + if (trailingChunk.trim() !== "") { + count += 1; + } + resolve(count); + }); + + stream.on("error", reject); + }); +} + +async function runCommand( + command: string, + args: string[], + env: NodeJS.ProcessEnv, + timeoutMs: number +): Promise { + await new Promise((resolve, reject) => { + const child = spawn(command, args, { env }); + let stderr = ""; + let timedOut = false; + + const timeout = setTimeout(() => { + timedOut = true; + child.kill("SIGTERM"); + }, timeoutMs); + + child.stderr.on("data", (chunk: Buffer | string) => { + stderr += chunk.toString(); + }); + + child.on("error", (error) => { + clearTimeout(timeout); + reject(error); + }); + + child.on("close", (code) => { + clearTimeout(timeout); + + if (code === 0) { + resolve(); + return; + } + + if (timedOut) { + reject(new HttpError(504, `${command} timed out after ${Math.round(timeoutMs / 1000)}s`)); + return; + } + + reject(new HttpError(400, stderr.trim() || `${command} failed with code ${code}`)); + }); + }); +} diff --git a/src/types.ts b/src/types.ts new file mode 100644 index 0000000..7b1a782 --- /dev/null +++ b/src/types.ts @@ -0,0 +1,23 @@ +export type LanguageStat = { + language: string; + files: number; + lines: number; +}; + +export type CountResult = { + repo: string; + ref: string | null; + sshKey: string | null; + cached: boolean; + lineCount: number; + fileCount: number; + languages: LanguageStat[]; + scannedAt: string; + durationMs: number; +}; + +export type CountRequest = { + repo: string; + ref: string | null; + sshKey: string | null; +}; diff --git a/tests/app.test.js b/tests/app.test.js new file mode 100644 index 0000000..e904e3a --- /dev/null +++ b/tests/app.test.js @@ -0,0 +1,77 @@ +import test from "node:test"; +import assert from "node:assert/strict"; +import request from "supertest"; + +import { createApp } from "../dist/app.js"; + +const baseConfig = { + apiKey: "", + cacheSweepIntervalMs: 300000, + cacheTtlMs: 300000, + cloneTimeoutMs: 45000, + defaultSshKeyName: "loc_via_git_ed25519", + generateSshKeyIfMissing: false, + maxConcurrentScans: 4, + port: 3000, + rateLimitMax: 30, + rateLimitWindowMs: 300000, + sshKeysDir: "/tmp/keys", + tempRoot: "/tmp/loc-via-git", + trustProxy: false +}; + +test("GET /loc returns count metadata", async () => { + const app = createApp(baseConfig, { + getHealth: () => ({ cacheEntries: 1, inFlight: 0, maxConcurrentScans: 4, activeScans: 0, queuedScans: 0 }), + getPublicKey: async () => "ssh-ed25519 AAAA", + getDefaultKeyName: () => "loc_via_git_ed25519", + count: async (requestInput) => ({ + repo: requestInput.repo, + ref: requestInput.ref, + sshKey: requestInput.sshKey, + cached: false, + lineCount: 12, + fileCount: 3, + languages: [{ language: "TypeScript", files: 3, lines: 12 }], + scannedAt: "2026-01-01T00:00:00.000Z", + durationMs: 123 + }) + }); + + const response = await request(app).get("/loc?repo=https://example.com/repo.git"); + + assert.equal(response.status, 200); + assert.equal(response.body.lineCount, 12); + assert.equal(response.body.languages[0].language, "TypeScript"); +}); + +test("GET /ssh/public-key returns text without auth", async () => { + const app = createApp({ ...baseConfig, apiKey: "secret" }, { + getHealth: () => ({ cacheEntries: 0, inFlight: 0, maxConcurrentScans: 4, activeScans: 0, queuedScans: 0 }), + getPublicKey: async () => "ssh-ed25519 AAAAB3 key", + getDefaultKeyName: () => "loc_via_git_ed25519", + count: async () => { + throw new Error("not used"); + } + }); + + const response = await request(app).get("/ssh/public-key"); + + assert.equal(response.status, 200); + assert.equal(response.text, "ssh-ed25519 AAAAB3 key"); +}); + +test("GET /loc enforces api key when configured", async () => { + const app = createApp({ ...baseConfig, apiKey: "secret" }, { + getHealth: () => ({ cacheEntries: 0, inFlight: 0, maxConcurrentScans: 4, activeScans: 0, queuedScans: 0 }), + getPublicKey: async () => "ssh-ed25519 AAAA", + getDefaultKeyName: () => "loc_via_git_ed25519", + count: async () => { + throw new Error("not used"); + } + }); + + const response = await request(app).get("/loc?repo=https://example.com/repo.git"); + + assert.equal(response.status, 401); +}); diff --git a/tests/language.test.js b/tests/language.test.js new file mode 100644 index 0000000..2b2096f --- /dev/null +++ b/tests/language.test.js @@ -0,0 +1,11 @@ +import test from "node:test"; +import assert from "node:assert/strict"; + +import { detectLanguage } from "../dist/language.js"; + +test("detectLanguage recognizes common source files", () => { + assert.equal(detectLanguage("/tmp/example.tsx"), "TypeScript React"); + assert.equal(detectLanguage("/tmp/Dockerfile"), "Dockerfile"); + assert.equal(detectLanguage("/tmp/types.d.ts"), "TypeScript"); + assert.equal(detectLanguage("/tmp/file.unknown"), "Plain Text"); +}); diff --git a/tests/smoke.sh b/tests/smoke.sh new file mode 100755 index 0000000..2830e09 --- /dev/null +++ b/tests/smoke.sh @@ -0,0 +1,13 @@ +#!/usr/bin/env bash +set -euo pipefail + +base_url="${1:-http://127.0.0.1:3000}" +repo="${2:-https://github.com/octocat/Hello-World.git}" + +health="$(curl -fsS "$base_url/health")" +loc_json="$(curl -fsS "$base_url/loc?repo=$repo")" +loc_text="$(curl -fsS "$base_url/loc.txt?repo=$repo")" + +printf 'health: %s\n' "$health" +printf 'loc json: %s\n' "$loc_json" +printf 'loc text: %s\n' "$loc_text" diff --git a/tsconfig.json b/tsconfig.json new file mode 100644 index 0000000..774e889 --- /dev/null +++ b/tsconfig.json @@ -0,0 +1,16 @@ +{ + "compilerOptions": { + "target": "ES2022", + "module": "NodeNext", + "moduleResolution": "NodeNext", + "outDir": "dist", + "rootDir": "src", + "strict": true, + "esModuleInterop": true, + "forceConsistentCasingInFileNames": true, + "skipLibCheck": true + }, + "include": [ + "src/**/*.ts" + ] +}