build: add scripts to merge GitHub PRs (#20)

PR Close #20

package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "scripts": {
     "test": "node ./scripts/checker.js",
-    "build-checker": "tsc -p ./tsconfig.json"
+    "build-checker": "tsc -p ./tsconfig.json",
+    "merge-pr": "node ./scripts/github/merge_pr.js"
   },
   "repository": {
     "type": "git",

scripts/github/github_closes.js

@@ -0,0 +1,26 @@
+var msg = '';
+
+if (require.main === module) {
+  process.stdin.setEncoding('utf8');
+
+  process.stdin.on('readable', () => {
+    const chunk = process.stdin.read();
+    if (chunk !== null) {
+      msg += chunk;
+    }
+  });
+
+  process.stdin.on('end', () => {
+    var argv = process.argv.slice(2);
+    console.log(rewriteMsg(msg, argv[0]));
+  });
+}
+
+function rewriteMsg(msg, prNo) {
+  var lines = msg.split(/\n/);
+  lines[0] += ' (#' + prNo + ')';
+  lines.push('PR Close #' + prNo);
+  return lines.join('\n');
+}
+
+exports.rewriteMsg = rewriteMsg;

scripts/github/merge_pr.js

@@ -0,0 +1,22 @@
+const run_command_1 = require("./run_command");
+const path_1 = require("path");
+const current = run_command_1.run('git rev-parse --abbrev-ref HEAD').trim();
+const base = path_1.resolve(__dirname, '../..');
+if (current !== 'master') {
+    console.log('Not currently on master');
+    process.exitCode = 1;
+}
+else {
+    if (process.argv.length !== 3) {
+        console.log('Merge GitHub PR into the master branch');
+        console.log();
+        console.log(`${process.argv[0]} ${process.argv[1]} PR_NUMBER`);
+        console.log();
+    }
+    else {
+        const prNumber = process.argv[2];
+        run_command_1.run(`git fetch upstream pull/${prNumber}/head:pr${prNumber}`);
+        run_command_1.run(`git filter-branch -f --msg-filter "${process.argv[0]} ${path_1.resolve(base, 'scripts/github/github_closes.js')} ${prNumber}" master..pr${prNumber}`);
+        run_command_1.run(`git cherry-pick master..pr${prNumber}`);
+    }
+}

scripts/github/run_command.js

@@ -0,0 +1,4 @@
+const child_process_1 = require("child_process");
+exports.run = (command) => {
+    return child_process_1.execSync(command).toString();
+};