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#!/usr/bin/python3
# Extract sourcesContent from a javascript source map produced by webpack.
#
# Usage: $0 <output.js.map> <extraction directory> > <filelist>
#
import json
import os
import re
import sys
PREFIX = "webpack:///"
FOOTER = re.compile(r"^(.*)\n\n/*\n/[\*/][\s\*]* WEBPACK FOOTER.*$", re.DOTALL)
remove_footer = True
def main(fn, outdir, *args):
with open(fn) as fp:
j = json.load(fp)
pairs = zip(j["sources"], j["sourcesContent"])
for f, c in pairs:
if f.startswith(PREFIX):
p = f[len(PREFIX):].replace("/~/", "/node_modules/")
assert not os.path.isabs(p)
print(p)
p = os.path.join(outdir, p)
dirname, basename = os.path.split(p)
if dirname:
os.makedirs(dirname, exist_ok=True)
if remove_footer:
c = re.sub(FOOTER, "\\1", c)
with open(p, 'w') as wfp:
wfp.write(c)
else:
print("unrecognised; ignoring: %s" % f, file=sys.stderr)
if __name__ == "__main__":
sys.exit(main(*sys.argv[1:]))
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