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https://github.com/zulip/zulip.git
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31afa36d7b
This takes stacktrace lines that used to look like this: n@https://chat.zulip.org/static/webpack-bundles/app.2385793af60f0b082ee9.js:1:12680 = webpack:///./static/js/blueslip.js line 241 column 1 dispatch@https://chat.zulip.org/static/webpack-bundles/app.2385793af60f0b082ee9.js:52:37878 = webpack:////srv/zulip-npm-cache/8ea4cd291dd23441aec0f298b77b6ddc0d0a7a56/node_modules/jquery/dist/jquery.js line 5182 column 1 to have the even-numbered lines look like this: = ./static/js/blueslip.js line 241 column 1 dispatch@https://chat.zulip.org/static/webpack-bundles/app.2385793af60f0b082ee9.js:52:37878 = /srv/zulip-npm-cache/8ea4cd291dd23441aec0f298b77b6ddc0d0a7a56/node_modules/jquery/dist/jquery.js line 5182 column 1
55 lines
2.2 KiB
Python
55 lines
2.2 KiB
Python
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import re
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import os
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import sourcemap
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from typing import Dict, List
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class SourceMap:
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'''Map (line, column) pairs from generated to source file.'''
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def __init__(self, sourcemap_dirs: List[str]) -> None:
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self._dirs = sourcemap_dirs
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self._indices = {} # type: Dict[str, sourcemap.SourceMapDecoder]
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def _index_for(self, minified_src: str) -> sourcemap.SourceMapDecoder:
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'''Return the source map index for minified_src, loading it if not
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already loaded.'''
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if minified_src not in self._indices:
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for source_dir in self._dirs:
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filename = os.path.join(source_dir, minified_src + '.map')
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if os.path.isfile(filename):
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with open(filename) as fp:
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self._indices[minified_src] = sourcemap.load(fp)
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break
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return self._indices[minified_src]
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def annotate_stacktrace(self, stacktrace: str) -> str:
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out = '' # type: str
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for ln in stacktrace.splitlines():
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out += ln + '\n'
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match = re.search(r'/static/(?:webpack-bundles|min)/(.+)(\.[\.0-9a-f]+\.js):(\d+):(\d+)', ln)
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if match:
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# Get the appropriate source map for the minified file.
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minified_src = match.groups()[0] + match.groups()[1]
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index = self._index_for(minified_src)
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gen_line, gen_col = list(map(int, match.groups()[2:4]))
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# The sourcemap lib is 0-based, so subtract 1 from line and col.
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try:
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result = index.lookup(line=gen_line-1, column=gen_col-1)
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display_src = result.src
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webpack_prefix = "webpack:///"
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if display_src.startswith(webpack_prefix):
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display_src = display_src[len(webpack_prefix):]
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out += (' = %s line %d column %d\n' %
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(display_src, result.src_line+1, result.src_col+1))
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except IndexError:
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out += ' [Unable to look up in source map]\n'
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if ln.startswith(' at'):
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out += '\n'
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return out
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