fix: harden npm distribution release and installer

- release.yml: build static musl Linux binaries (no host glibc
  requirement), add darwin-x64, publish SHA256SUMS, allow
  workflow_dispatch for an existing tag (v0.2.3 has no binaries yet),
  and run build-only on PRs that touch the workflow or installer
- install.js: verify downloads against the release SHA256SUMS
  (IDX_BINARY_SHA256 for overrides), add a 60s request timeout, use
  stream.pipeline so truncated downloads fail, and skip the download
  inside the source checkout
- idx.js: forward SIGTERM/SIGHUP to the binary and keep the signal
  exit status
- package.json: drop the prepare script (no Rust toolchain needed to
  pack/publish)
- npm-smoke.sh: read the tarball name from npm pack, use grep over rg
- .gitignore: ignore /bin/ and *.tgz
- docs: musl targets, checksums, pnpm/bun opt-in, manual release flow

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017a5Cv5Z1NzdYKgKnTiAF4E

.github/workflows/release.yml

@@ -4,10 +4,25 @@ on:
   push:
     tags:
       - "v*"
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "Existing release tag to build and attach binaries to (for example v0.2.3)"
+        required: true
+  pull_request:
+    paths:
+      - ".github/workflows/release.yml"
+      - "Cargo.toml"
+      - "Cargo.lock"
+      - "package.json"
+      - "scripts/install.js"
 
 permissions:
   contents: write
 
+env:
+  RELEASE_TAG: ${{ github.event_name == 'workflow_dispatch' && inputs.tag || github.ref_name }}
+
 jobs:
   build:
     name: Build ${{ matrix.asset }}
@@ -17,38 +32,49 @@ jobs:
       matrix:
         include:
           - os: ubuntu-latest
-            target: x86_64-unknown-linux-gnu
+            target: x86_64-unknown-linux-musl
             asset: linux-x64
-          - os: ubuntu-latest
+          - os: ubuntu-24.04-arm
-            target: aarch64-unknown-linux-gnu
+            target: aarch64-unknown-linux-musl
             asset: linux-arm64
           - os: macos-14
             target: aarch64-apple-darwin
             asset: darwin-arm64
+          - os: macos-14
+            target: x86_64-apple-darwin
+            asset: darwin-x64
 
     steps:
       - name: Check out source
         uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event_name == 'workflow_dispatch' && inputs.tag || github.ref }}
 
       - name: Install Rust toolchain and target
         uses: dtolnay/rust-toolchain@stable
         with:
           targets: ${{ matrix.target }}
 
-      - name: Install Linux ARM64 linker
+      - name: Install musl toolchain
-        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        if: endsWith(matrix.target, '-linux-musl')
-        run: sudo apt-get update && sudo apt-get install --yes gcc-aarch64-linux-gnu
+        run: sudo apt-get update && sudo apt-get install --yes musl-tools
 
       - name: Build release binary
         shell: bash
         run: |
-          if [[ "${{ matrix.target }}" == "aarch64-unknown-linux-gnu" ]]; then
+          target="${{ matrix.target }}"
-            export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
+          if [[ "$target" == *-linux-musl ]]; then
+            # Bundled SQLite and ring compile C code; build it against musl too.
+            export "CC_${target//-/_}=musl-gcc"
           fi
-          cargo build --release --locked --target "${{ matrix.target }}"
+          cargo build --release --locked --target "$target"
           cp "target/${{ matrix.target }}/release/idx" "idx-${{ matrix.asset }}"
           chmod 0755 "idx-${{ matrix.asset }}"
 
+      - name: Check binary runs
+        if: matrix.target != 'x86_64-apple-darwin'
+        run: ./idx-${{ matrix.asset }} --help >/dev/null
+
       - name: Upload target artifact
         uses: actions/upload-artifact@v4
         with:
@@ -59,6 +85,7 @@ jobs:
   publish:
     name: Attach binaries to release
     needs: build
+    if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
     steps:
       - name: Download target artifacts
@@ -67,11 +94,16 @@ jobs:
           pattern: idx-*
           merge-multiple: true
 
+      - name: Write checksums
+        run: sha256sum idx-linux-x64 idx-linux-arm64 idx-darwin-arm64 idx-darwin-x64 > SHA256SUMS
+
       - name: Attach binaries to the version tag
         uses: softprops/action-gh-release@v2
         with:
-          tag_name: ${{ github.ref_name }}
+          tag_name: ${{ env.RELEASE_TAG }}
           files: |
             idx-linux-x64
             idx-linux-arm64
             idx-darwin-arm64
+            idx-darwin-x64
+            SHA256SUMS

.gitignore

@@ -1,4 +1,6 @@
 node_modules/
+/bin/
+*.tgz
 target/
 .direnv/
 .claude/

docs/NPM_DISTRIBUTION.md

@@ -9,9 +9,13 @@ Supported release assets:
 
 | npm platform | Rust target | Release asset |
 | --- | --- | --- |
-| Linux x64 | `x86_64-unknown-linux-gnu` | `idx-linux-x64` |
+| Linux x64 | `x86_64-unknown-linux-musl` | `idx-linux-x64` |
-| Linux arm64 | `aarch64-unknown-linux-gnu` | `idx-linux-arm64` |
+| Linux arm64 | `aarch64-unknown-linux-musl` | `idx-linux-arm64` |
 | macOS arm64 | `aarch64-apple-darwin` | `idx-darwin-arm64` |
+| macOS x64 | `x86_64-apple-darwin` | `idx-darwin-x64` |
+
+The Linux binaries are statically linked against musl, so they do not depend
+on the host glibc version.
 
 Windows and other platform combinations are out of scope. The postinstall
 script reports the supported targets when it rejects a platform.
@@ -29,6 +33,25 @@ npx idx-cli --help
 The package version and the release tag must match. For example, package
 version `0.2.3` downloads assets from the `v0.2.3` GitHub Release.
 
+The postinstall script downloads `SHA256SUMS` from the same release and
+refuses to install a binary whose checksum does not match.
+
+### pnpm and bun
+
+pnpm 10+ and bun do not run dependency lifecycle scripts by default, so the
+binary is never downloaded and `idx` reports that it is missing. Allow the
+postinstall script explicitly:
+
+```bash
+# pnpm
+pnpm add --global --allow-build=idx-cli idx-cli
+
+# bun
+bun add --global --trust idx-cli
+```
+
+Plain `npm install` and `npx` run the postinstall script normally.
+
 ## Local smoke test
 
 The smoke script builds or reuses `target/release/idx`, packs the npm wrapper,
@@ -41,15 +64,31 @@ nix develop -c bash -c 'scripts/npm-smoke.sh'
 nix develop -c bash -c 'npm pack --dry-run'
 ```
 
-The `prepare` npm script builds the Rust release binary when npm packs the
+The `postinstall` script performs the release download for normal package
-wrapper from this checkout. The `postinstall` script performs the release
+installation. It skips the download when it runs inside this source checkout
-download for normal package installation. `IDX_BINARY_URL` accepts an HTTP(S)
+(where `Cargo.toml` exists) unless `IDX_BINARY_URL` is set. `IDX_BINARY_URL`
-URL, a `file:` URL, or an existing local path for local testing.
+accepts an HTTP(S) URL, a `file:` URL, or an existing local path for local
+testing. Set `IDX_BINARY_SHA256` to verify an override binary as well.
 
 ## GitHub Release workflow
 
 Pushing a tag that matches `v*` starts
-`.github/workflows/release.yml`. The workflow builds all three supported Rust
+`.github/workflows/release.yml`. The workflow builds all supported Rust
-targets, names the binaries with the asset names above, and attaches them to
+targets, names the binaries with the asset names above, writes `SHA256SUMS`,
-the matching GitHub Release. The asset names and URLs must stay aligned with
+and attaches everything to the matching GitHub Release. The asset names and
-`scripts/install.js`.
+URLs must stay aligned with `scripts/install.js`.
+
+To attach binaries to a tag that already exists, run the workflow manually:
+
+```bash
+gh workflow run release.yml -f tag=v0.2.3
+```
+
+Pull requests that touch the workflow or the installer run the build jobs
+without publishing, so target breakage shows up before a release.
+
+Release order:
+
+1. Push the tag, or run the workflow for an existing tag.
+2. Confirm the release has all binaries plus `SHA256SUMS`.
+3. Run `npm publish`.

package.json

@@ -27,7 +27,6 @@
   ],
   "scripts": {
     "postinstall": "node scripts/install.js",
-    "prepare": "cargo build --release --locked",
     "smoke": "bash scripts/npm-smoke.sh"
   }
 }

scripts/idx.js

@@ -16,6 +16,13 @@ if (!fs.existsSync(binaryPath)) {
 
 const child = spawn(binaryPath, process.argv.slice(2), { stdio: "inherit" });
 
+// Pass termination signals from a supervisor (kill, docker stop) to the binary.
+for (const signal of ["SIGTERM", "SIGHUP"]) {
+  process.on(signal, () => child.kill(signal));
+}
+// Ctrl+C already reaches the binary through the terminal's process group.
+process.on("SIGINT", () => {});
+
 child.once("error", (error) => {
   console.error(`idx-cli: failed to start ${binaryPath}: ${error.message}`);
   process.exit(1);
@@ -23,6 +30,7 @@ child.once("error", (error) => {
 
 child.once("exit", (code, signal) => {
   if (signal) {
+    process.removeAllListeners(signal);
     process.kill(process.pid, signal);
     return;
   }

scripts/install.js

@@ -1,10 +1,12 @@
 #!/usr/bin/env node
 "use strict";
 
+const crypto = require("node:crypto");
 const fs = require("node:fs");
 const http = require("node:http");
 const https = require("node:https");
 const path = require("node:path");
+const { pipeline } = require("node:stream");
 const { URL, fileURLToPath } = require("node:url");
 
 const packageRoot = path.resolve(__dirname, "..");
@@ -16,6 +18,7 @@ const binaryDirectory = path.join(packageRoot, "bin");
 const binaryPath = path.join(binaryDirectory, binaryName);
 const githubRepository = "0xrsydn/idx-cli";
 const maxRedirects = 5;
+const requestTimeoutMs = 60_000;
 
 const targets = {
   "linux/x64": {
@@ -33,6 +36,11 @@ const targets = {
     triple: "aarch64-apple-darwin",
     asset: "idx-darwin-arm64",
   },
+  "darwin/x64": {
+    label: "darwin-x64",
+    triple: "x86_64-apple-darwin",
+    asset: "idx-darwin-x64",
+  },
 };
 
 function currentTarget() {
@@ -49,8 +57,8 @@ function currentTarget() {
   return target;
 }
 
-function releaseAssetUrl(target) {
+function releaseAssetUrl(assetName) {
-  return `https://github.com/${githubRepository}/releases/download/v${packageManifest.version}/${target.asset}`;
+  return `https://github.com/${githubRepository}/releases/download/v${packageManifest.version}/${assetName}`;
 }
 
 function ensureBinaryDirectory() {
@@ -80,7 +88,7 @@ function replaceWithLocalBinary(sourcePath) {
   }
 }
 
-function download(url, destination, redirects = 0) {
+function request(url, onResponse, redirects = 0) {
   if (redirects > maxRedirects) {
     return Promise.reject(new Error(`too many redirects while downloading ${url}`));
   }
@@ -89,7 +97,7 @@ function download(url, destination, redirects = 0) {
   try {
     parsedUrl = new URL(url);
   } catch (error) {
-    return Promise.reject(new Error(`invalid IDX_BINARY_URL: ${error.message}`));
+    return Promise.reject(new Error(`invalid download URL: ${error.message}`));
   }
 
   if (!["http:", "https:"].includes(parsedUrl.protocol)) {
@@ -98,7 +106,7 @@ function download(url, destination, redirects = 0) {
 
   const client = parsedUrl.protocol === "https:" ? https : http;
   return new Promise((resolve, reject) => {
-    const request = client.get(
+    const req = client.get(
       parsedUrl,
       {
         headers: {
@@ -111,7 +119,7 @@ function download(url, destination, redirects = 0) {
         if (status >= 300 && status < 400 && response.headers.location) {
           const redirectedUrl = new URL(response.headers.location, parsedUrl).toString();
           response.resume();
-          download(redirectedUrl, destination, redirects + 1).then(resolve, reject);
+          request(redirectedUrl, onResponse, redirects + 1).then(resolve, reject);
           return;
         }
 
@@ -121,21 +129,69 @@ function download(url, destination, redirects = 0) {
           return;
         }
 
-        const output = fs.createWriteStream(destination, { mode: 0o755 });
+        onResponse(response).then(resolve, reject);
-        output.once("finish", resolve);
-        output.once("error", reject);
-        response.once("error", reject);
-        response.pipe(output);
       },
     );
-    request.once("error", reject);
+    req.setTimeout(requestTimeoutMs, () => {
+      req.destroy(new Error(`timed out after ${requestTimeoutMs / 1000}s downloading ${url}`));
+    });
+    req.once("error", reject);
   });
 }
 
-async function replaceWithDownloadedBinary(url) {
+function download(url, destination) {
+  return request(
+    url,
+    (response) =>
+      new Promise((resolve, reject) => {
+        const output = fs.createWriteStream(destination, { mode: 0o755 });
+        pipeline(response, output, (error) => (error ? reject(error) : resolve()));
+      }),
+  );
+}
+
+function downloadText(url) {
+  return request(
+    url,
+    (response) =>
+      new Promise((resolve, reject) => {
+        const chunks = [];
+        response.on("data", (chunk) => chunks.push(chunk));
+        response.once("end", () => resolve(Buffer.concat(chunks).toString("utf8")));
+        response.once("error", reject);
+      }),
+  );
+}
+
+function sha256File(filePath) {
+  return crypto.createHash("sha256").update(fs.readFileSync(filePath)).digest("hex");
+}
+
+async function expectedReleaseChecksum(assetName) {
+  const sums = await downloadText(releaseAssetUrl("SHA256SUMS"));
+  for (const line of sums.split(/\r?\n/)) {
+    const [hash, name] = line.trim().split(/\s+\*?/);
+    if (name === assetName && /^[0-9a-f]{64}$/i.test(hash)) {
+      return hash.toLowerCase();
+    }
+  }
+  throw new Error(`SHA256SUMS for v${packageManifest.version} has no entry for ${assetName}`);
+}
+
+function verifyChecksum(filePath, expected, label) {
+  const actual = sha256File(filePath);
+  if (actual !== expected.toLowerCase()) {
+    throw new Error(`checksum mismatch for ${label}: expected ${expected}, got ${actual}`);
+  }
+}
+
+async function replaceWithDownloadedBinary(url, expectedSha256) {
   const temporaryPath = temporaryBinaryPath();
   try {
     await download(url, temporaryPath);
+    if (expectedSha256) {
+      verifyChecksum(temporaryPath, expectedSha256, url);
+    }
     fs.chmodSync(temporaryPath, 0o755);
     fs.renameSync(temporaryPath, binaryPath);
   } finally {
@@ -165,14 +221,25 @@ function localPathFromOverride(value) {
 }
 
 async function main() {
-  const target = currentTarget();
   const override = process.env.IDX_BINARY_URL;
-  const source = override || releaseAssetUrl(target);
+  const overrideSha256 = process.env.IDX_BINARY_SHA256;
+
+  // `npm install` inside the Rust checkout should not fetch a release binary.
+  if (!override && fs.existsSync(path.join(packageRoot, "Cargo.toml"))) {
+    console.log("idx-cli: source checkout detected; skipping binary download (set IDX_BINARY_URL to override)");
+    return;
+  }
+
+  const target = currentTarget();
+  const source = override || releaseAssetUrl(target.asset);
 
   ensureBinaryDirectory();
   if (override) {
     const localPath = localPathFromOverride(override);
     if (localPath) {
+      if (overrideSha256) {
+        verifyChecksum(localPath, overrideSha256, localPath);
+      }
       replaceWithLocalBinary(localPath);
       console.log(`idx-cli: installed local binary from ${path.resolve(localPath)}`);
       return;
@@ -182,7 +249,10 @@ async function main() {
     console.log(`idx-cli: downloading ${target.asset} for ${target.label} from ${source}`);
   }
 
-  await replaceWithDownloadedBinary(source);
+  const expectedSha256 = override
+    ? overrideSha256
+    : await expectedReleaseChecksum(target.asset);
+  await replaceWithDownloadedBinary(source, expectedSha256);
   console.log(`idx-cli: installed binary at ${binaryPath}`);
 }
 

scripts/npm-smoke.sh

@@ -3,7 +3,6 @@ set -Eeuo pipefail
 
 repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 smoke_dir="$(mktemp -d "${TMPDIR:-/tmp}/idx-cli-npm-smoke.XXXXXX")"
-tarball="${smoke_dir}/idx-cli-0.2.3.tgz"
 install_dir="${smoke_dir}/install"
 npm_cache="${smoke_dir}/npm-cache"
 
@@ -37,8 +36,9 @@ fi
 
 echo "npm smoke: packing wrapper"
 mkdir -p "$npm_cache"
-npm_config_cache="$npm_cache" npm pack --silent --pack-destination "$smoke_dir" >/dev/null
+tarball_name="$(npm_config_cache="$npm_cache" npm pack --silent --pack-destination "$smoke_dir" | tail -n 1)"
-if [[ ! -f "$tarball" ]]; then
+tarball="${smoke_dir}/${tarball_name}"
+if [[ -z "$tarball_name" || ! -f "$tarball" ]]; then
   echo "npm smoke: expected tarball was not produced at ${tarball}" >&2
   exit 1
 fi
@@ -64,7 +64,7 @@ fi
 help_output="${smoke_dir}/help.txt"
 echo "npm smoke: running installed idx --help"
 "$resolved_bin" --help | tee "$help_output"
-if ! rg -q "Usage: idx" "$help_output"; then
+if ! grep -q "Usage: idx" "$help_output"; then
   echo "npm smoke: --help output did not contain the expected usage line" >&2
   exit 1
 fi