Build ninja binary in CI

Author: cknitt

.github/workflows/ci.yml

@@ -45,6 +45,16 @@ jobs:
         with:
           node-version: 16
 
+      # Required for ninja build
+      - name: "Windows: Use MSVC"
+        if: runner.os == 'Windows'
+        uses: TheMrMilchmann/setup-msvc-dev@v2
+        with:
+          arch: x64
+
+      - name: Build ninja
+        run: node scripts/buildNinjaBinary.js
+
       - name: NPM install
         run: opam exec -- npm ci
         env:

scripts/.npmignore

@@ -4,3 +4,4 @@ format.js
 local_br_clean.sh
 setVersion.js
 makeArtifactList.js
+buildNinjaBinary.js

scripts/buildNinjaBinary.js

@@ -0,0 +1,29 @@
+#!/usr/bin/env node
+
+const child_process = require("child_process");
+const fs = require("fs");
+const path = require("path");
+
+const platform = process.platform;
+const ninjaDir = path.join(__dirname, "..", "ninja");
+const buildCommand = "python configure.py --bootstrap --verbose";
+
+if (platform === "win32") {
+  // On Windows, the build uses the MSVC compiler which needs to be on the path.
+  child_process.execSync(buildCommand, { cwd: ninjaDir });
+} else {
+  if (process.platform === "darwin") {
+    process.env["CXXFLAGS"] = "-flto";
+  }
+  child_process.execSync(buildCommand, { stdio: [0, 1, 2], cwd: ninjaDir });
+  child_process.execSync(`strip ninja`, { stdio: [0, 1, 2], cwd: ninjaDir });
+}
+
+const src = path.join(ninjaDir, `ninja${platform === "win32" ? ".exe" : ""}`);
+
+const dst =
+  platform === "darwin" && process.arch === "arm64"
+    ? path.join(__dirname, "..", process.platform + process.arch, `ninja.exe`)
+    : path.join(__dirname, "..", platform, `ninja.exe`);
+
+fs.copyFileSync(src, dst);