Add npm publish helper tool

Summary:
    The helper tool extract files from CircleCI stored dist.tgz.
    And publish dist/ packages to jsc-android@{VERSION} with {TAG}
                dist.unstripped/ to jsc-android@{VERSION}-unstripped with {TAG}-unstripped

    Usage:
        python scripts/publish.py -T {TAG} /path/to/dist.tgz [--dry-run]

    E.g.
        python scripts/publish.py -T next ~/Downloads/dist.tgz --dry-run
        python scripts/publish.py -T latest ~/Downloads/dist.tgz

Author: Kudo

scripts/publish.py

@@ -0,0 +1,86 @@
+#!/usr/bin/env python
+import argparse
+import json
+import os
+import shutil
+import subprocess
+import sys
+
+ROOT_DIR = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
+
+
+class PackageConfigPatcher:
+    def __init__(self, suffix=''):
+        self._suffix = suffix
+        self._config_path = os.path.join(ROOT_DIR, 'package.json')
+        self._orig_config = ''
+
+    def __enter__(self):
+        with open(self._config_path, 'r') as f:
+            self._orig_config = f.read()
+        patched_config = self._create_patched_config(self._orig_config)
+        with open(self._config_path, 'w') as f:
+            f.write(patched_config)
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        with open(self._config_path, 'w') as f:
+            f.write(self._orig_config)
+
+    def _create_patched_config(self, config):
+        patched_config = json.loads(config)
+        if self._suffix:
+            patched_config[
+                'version'] = patched_config['version'] + '-' + self._suffix
+        return json.dumps(patched_config, indent=2)
+
+
+def parse_args():
+    arg_parser = argparse.ArgumentParser()
+
+    arg_parser.add_argument(
+        '--dry-run', action='store_true', help='Dry run mode for npm publish')
+    arg_parser.add_argument(
+        '--tag', '-T', type=str, required=True, help='NPM published tag')
+    arg_parser.add_argument(
+        'dist_tar_file', action='store', help='dist.tgz created from CI')
+
+    args = arg_parser.parse_args()
+    if not args.dist_tar_file:
+        arg_parser.print_help()
+        sys.exit(1)
+    return args
+
+
+def main():
+    args = parse_args()
+
+    workdir = os.path.join(ROOT_DIR, 'build', 'publish')
+    if not os.path.exists(workdir):
+        os.makedirs(workdir)
+    distdir = os.path.join(ROOT_DIR, 'dist')
+    dryrun = '--dry-run' if args.dry_run else ''
+
+    print('\n\n========== Publish standard package ==========')
+    with PackageConfigPatcher(''):
+        if os.path.exists(distdir):
+            shutil.rmtree(distdir)
+        subprocess.check_call(
+            ['tar', '-xf', args.dist_tar_file, '-C', workdir])
+        shutil.move(os.path.join(workdir, 'dist'), distdir)
+        subprocess.check_call(['npm', 'publish', dryrun, '--tag', args.tag])
+
+    print('\n\n========== Publish unstripped package ==========')
+    with PackageConfigPatcher('unstripped'):
+        if os.path.exists(distdir):
+            shutil.rmtree(distdir)
+        subprocess.check_call(
+            ['tar', '-xf', args.dist_tar_file, '-C', workdir])
+        shutil.move(os.path.join(workdir, 'dist.unstripped'), distdir)
+        subprocess.check_call(
+            ['npm', 'publish', dryrun, '--tag', args.tag + '-unstripped'])
+
+    shutil.rmtree(workdir)
+
+
+if __name__ == '__main__':
+    main()