Recognize electron as a valid runtime

README.md

@@ -71,7 +71,7 @@ Options include:
 
  - `-C/--directory`: run the command in this directory
  - `--build-from-source`: build from source instead of using pre-built binary
- - `--runtime=node-webkit`: customize the runtime: `node` and `node-webkit` are the valid options
+ - `--runtime=node-webkit`: customize the runtime: `node`, `electron` and `node-webkit` are the valid options
  - `--fallback-to-build`: fallback to building from source if pre-built binary is not available
  - `--target=0.10.25`: Pass the target node or node-webkit version to compile against
  - `--target_arch=ia32`: Pass the target arch and override the host `arch`. Valid values are 'ia32','x64', or `arm`.

lib/util/versioning.js

@@ -17,6 +17,20 @@ if (process.env.NODE_PRE_GYP_ABI_CROSSWALK) {
     abi_crosswalk = require('./abi_crosswalk.json');
 }
 
+function get_electron_abi(runtime, target_version) {
+    if (!runtime) {
+        throw new Error("get_electron_abi requires valid runtime arg");
+    }
+    if (typeof target_version === 'undefined') {
+        // erroneous CLI call
+        throw new Error("Empty target version is not supported if electron is the target.");
+    }
+    // Electron guarentees that patch version update won't break native modules.
+    var sem_ver = semver.parse(target_version);
+    return runtime + '-v' + sem_ver.major + '.' + sem_ver.minor;
+}
+module.exports.get_electron_abi = get_electron_abi;
+
 function get_node_webkit_abi(runtime, target_version) {
     if (!runtime) {
         throw new Error("get_node_webkit_abi requires valid runtime arg");
@@ -55,6 +69,8 @@ function get_runtime_abi(runtime, target_version) {
     }
     if (runtime === 'node-webkit') {
         return get_node_webkit_abi(runtime, target_version || process.versions['node-webkit']);
+    } else if (runtime === 'electron') {
+        return get_electron_abi(runtime, target_version || process.versions.electron);
     } else {
         if (runtime != 'node') {
             throw new Error("Unknown Runtime: '" + runtime + "'");