Build libzmq from node script

Author: lgeiger

package.json

@@ -24,7 +24,7 @@
     "node": ">=0.10"
   },
   "scripts": {
-    "build:libzmq": "node scripts/download-win-lib.js && ./build_libzmq.sh",
+    "build:libzmq": "node scripts/preinstall.js",
     "install": "prebuild --install --preinstall \"npm run build:libzmq\"",
     "rebuild": "prebuild --compile",
     "prebuild": "prebuild --all --strip",

scripts/download-win-lib.js scripts/preinstall.jsscripts/download-win-lib.js renamed to scripts/preinstall.js

@@ -13,4 +13,15 @@ if (process.platform === 'win32') {
   }
 
   download(TAR_URL, FILE_NAME);
+} else {
+  console.log('Building libzmq for ' + process.platform)
+
+  var spawn = require('child_process').spawn;
+  var child = spawn('./build_libzmq.sh');
+
+  child.stdout.pipe(process.stdout);
+  child.stderr.pipe(process.stderr);
+  child.on('error', (err) => {
+  console.log('Failed to start child process.');
+});
 }