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# Copyright 2021 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import argparse
import collections
import json
import os
import re
import sys
_CWD = os.getcwd()
_HERE_DIR = os.path.dirname(__file__)
_SRC_DIR = os.path.normpath(os.path.join(_HERE_DIR, '..', '..'))
sys.path.append(os.path.join(_SRC_DIR, 'third_party', 'node'))
import node
import node_modules
_TSCONFIG_BASE = 'tsconfig_definitions_base.json'
_TSCONFIG_GEN = 'tsconfig_definitions.json'
def _write_tsconfig_json(gen_dir, tsconfig):
if not os.path.exists(gen_dir):
os.makedirs(gen_dir)
with open(os.path.join(gen_dir, _TSCONFIG_GEN), 'w',
encoding='utf-8') as generated_tsconfig:
json.dump(tsconfig, generated_tsconfig, indent=2)
return
def main(argv):
parser = argparse.ArgumentParser()
parser.add_argument('--deps', nargs='*')
parser.add_argument('--gen_dir', required=True)
parser.add_argument('--out_dir', required=True)
parser.add_argument('--root_dir', required=True)
parser.add_argument('--js_files', nargs='*', required=True)
parser.add_argument('--path_mappings', nargs='*')
args = parser.parse_args(argv)
with open(os.path.join(_HERE_DIR, _TSCONFIG_BASE),
encoding='utf-8') as root_tsconfig:
tsconfig = json.loads(root_tsconfig.read())
root_dir = os.path.relpath(args.root_dir, args.gen_dir)
out_dir = os.path.relpath(args.out_dir, args.gen_dir)
tsconfig['files'] = [os.path.join(root_dir, f) for f in args.js_files]
tsconfig['compilerOptions']['rootDir'] = root_dir
tsconfig['compilerOptions']['outDir'] = out_dir
if tsconfig['compilerOptions']['typeRoots'] is not None:
tsconfig['compilerOptions']['typeRoots'] = \
[os.path.relpath(os.path.join(_HERE_DIR, f), args.gen_dir) for f \
in tsconfig['compilerOptions']['typeRoots']]
# Handle custom path mappings, for example chrome://resources/ URLs.
if args.path_mappings is not None:
path_mappings = collections.defaultdict(list)
for m in args.path_mappings:
mapping = m.split('|')
path_mappings[mapping[0]].append(os.path.join('./', mapping[1]))
tsconfig['compilerOptions']['paths'] = path_mappings
if args.deps is not None:
tsconfig['references'] = [{'path': dep} for dep in args.deps]
_write_tsconfig_json(args.gen_dir, tsconfig)
if (args.root_dir == args.out_dir):
# Delete .d.ts files if they already exist, otherwise TypeScript compiler
# throws "error TS5055: Cannot write file ... because it would overwrite
# input file" errors.
for f in args.js_files:
to_delete = os.path.join(args.out_dir, re.sub(r'\.js$', '.d.ts', f))
if os.path.exists(to_delete):
os.remove(to_delete)
stdout = node.RunNode([
node_modules.PathToTypescript(), '--project',
os.path.join(args.gen_dir, _TSCONFIG_GEN)
])
# Verify that that no unexpected .d.ts files were generated.
lines = stdout.splitlines()
token = 'TSFILE: '
generated_files = []
for l in lines:
if token in l:
generated_files.append(
os.path.normpath(os.path.relpath(l[len(token):], args.out_dir)))
args.js_files.sort()
generated_files_set = set(generated_files)
for i, _js_file in enumerate(args.js_files):
js_file = os.path.normpath(_js_file)
expected_file = base = os.path.splitext(js_file)[0] + '.d.ts'
if expected_file in generated_files_set:
# Remove the file from the set, to check at the end if any unexpected
# files were generated.
generated_files_set.remove(expected_file)
unexpected_files_found = len(generated_files_set) > 0
# Delete all generated files to not pollute the gen/ folder with any invalid
# files, which could cause problems on subsequent builds.
if unexpected_files_found:
for f in generated_files:
os.remove(os.path.join(args.out_dir, f))
raise Exception(\
'Unexpected file(s) \'%s\' generated, deleting all generated files.' \
% generated_files_set)
if __name__ == '__main__':
main(sys.argv[1:])
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