| # Copyright 2017 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| """Used by a js_binary action to compile javascript files. |
| |
| This script takes in a list of sources and dependencies and compiles them all |
| together into a single compiled .js file. The dependencies are ordered in a |
| post-order, left-to-right traversal order. If multiple instances of the same |
| source file are read, only the first is kept. The script can also take in |
| optional --flags argument which will add custom flags to the compiler. Any |
| extern files can also be passed in using the --extern flag. |
| """ |
| |
| from argparse import ArgumentParser |
| import os |
| import compile2 |
| |
| |
| def ParseDepList(dep): |
| """Parses a depenency list, returns |sources, deps|.""" |
| assert os.path.isfile(dep), (os.path.splitext(dep) + |
| ' is not a js_library target') |
| with open(dep, 'r') as dep_list: |
| lines = dep_list.read().splitlines() |
| assert 'deps:' in lines, dep + ' is not formated correctly, missing "deps:"' |
| split = lines.index('deps:') |
| return lines[1:split], lines[split+1:] |
| |
| |
| def CrawlDepsTree(deps, sources): |
| """Parses the dependency tree creating a post-order listing of sources.""" |
| for dep in deps: |
| new_sources, new_deps = ParseDepList(dep) |
| |
| sources = CrawlDepsTree(new_deps, sources) |
| sources += [source for source in new_sources if source not in sources] |
| return sources |
| |
| |
| def main(): |
| parser = ArgumentParser() |
| parser.add_argument('-c', '--compiler', required=True, |
| help='Path to compiler') |
| parser.add_argument('-s', '--sources', nargs='*', default=[], |
| help='List of js source files') |
| parser.add_argument('-o', '--output', required=True, |
| help='Compile to output') |
| parser.add_argument('-d', '--deps', nargs='*', default=[], |
| help='List of js_libarary dependencies') |
| parser.add_argument('-b', '--bootstrap', |
| help='A file to include before all others') |
| parser.add_argument('-cf', '--config', nargs='*', default=[], |
| help='A list of files to include after bootstrap and ' |
| 'before all others') |
| parser.add_argument('-f', '--flags', nargs='*', default=[], |
| help='A list of custom flags to pass to the compiler. ' |
| 'Do not include leading dashes') |
| parser.add_argument('-e', '--externs', nargs='*', default=[], |
| help='A list of extern files to pass to the compiler') |
| |
| args = parser.parse_args() |
| sources = CrawlDepsTree(args.deps, []) + args.sources |
| |
| compiler_args = ['--%s' % flag for flag in args.flags] |
| compiler_args += ['--externs=%s' % e for e in args.externs] |
| compiler_args += [ |
| '--js_output_file', |
| args.output, |
| '--js', |
| ] |
| if args.bootstrap: |
| compiler_args += [args.bootstrap] |
| compiler_args += args.config |
| compiler_args += sources |
| |
| compile2.Checker().run_jar(args.compiler, compiler_args) |
| |
| |
| if __name__ == '__main__': |
| main() |