[build] Add filter script for official build

This adds a V8-side script to list the files contained in an official archive.

This'll accompany the infra-side archive recipe:
https://chromium-review.googlesource.com/c/544298/

Keeping this script on the V8-side will make it easy to change the
archived build product.

NOTRY=true

Bug: v8:5918
Change-Id: I9fcb2eae183a26e7ce11c839d95a583a049cbe75
Reviewed-on: https://chromium-review.googlesource.com/544877
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46135}

BUILD.gn

@@ -2774,6 +2774,16 @@ group("v8_clusterfuzz") {
   }
 }
 
+group("v8_archive") {
+  deps = [
+    ":d8",
+    ":v8_hello_world",
+    ":v8_parser_shell",
+    ":v8_sample_process",
+    ":v8_shell",
+  ]
+}
+
 group("v8_fuzzers") {
   testonly = true
   deps = [

tools/release/filter_build_files.py

+#!/usr/bin/env python
+# Copyright 2017 the V8 project authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Enumerates relevant build files for each platform.
+
+This can be used to filter the build directory before making an official
+archive. The archive should only contain files required for running or
+static linking, e.g. executables, startup files, libraries.
+
+The script is limited to release builds and assumes GN.
+"""
+
+import argparse
+import glob
+import itertools
+import json
+import os
+import re
+import sys
+
+EXECUTABLES = [
+  'd8',
+  'v8_hello_world',
+  'v8_parser_shell',
+  'v8_sample_process',
+  'v8_shell',
+]
+
+SUPPLEMENTARY_FILES = [
+  'icudtl.dat',
+  'natives_blob.bin',
+  'snapshot_blob.bin',
+  'v8_build_config.json',
+]
+
+LIBS = {
+  'linux': ['*.a', '*.so', 'obj/*.a', 'obj/*.so'],
+  'mac': ['*.a', '*.so', 'obj/*.a', 'obj/*.so'],
+  'win': ['*.lib', '*.dll', 'obj\\*.a', 'obj\\*.so'],
+}
+
+
+def main(argv):
+  parser = argparse.ArgumentParser(description=__doc__)
+
+  parser.add_argument('-d', '--dir', required=True,
+                      help='Path to the build directory.')
+  parser.add_argument('-p', '--platform', required=True,
+                      help='Target platform name: win|mac|linux.')
+  parser.add_argument('-o', '--json-output', required=True,
+                      help='Path to an output file. The files will '
+                           'be stored in json list with absolute paths.')
+  args = parser.parse_args()
+
+  if not os.path.isdir(args.dir):
+    parser.error('%s is not an existing directory.' % args.dir)
+
+  args.dir = os.path.abspath(args.dir)
+
+  extended_executables = [
+    f + '.exe' if args.platform == 'win' else f
+    for f in EXECUTABLES]
+
+  all_globs = [
+    os.path.join(args.dir, f)
+    for f in extended_executables + SUPPLEMENTARY_FILES + LIBS[args.platform]
+  ]
+
+  with open(args.json_output, 'w') as f:
+    json.dump(list(itertools.chain(*map(glob.iglob, all_globs))), f)
+
+  return 0
+
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv))