[Reproducible-builds] Bug#813052: Bug#813052: diffoscope takes more than an hour on foreign arch libc6

[Steven Chamberlain]

Jérémy Bobbio wrote:
> Steven Chamberlain:
> > But it will still stat() everything in the containing directory,
> > looking for .debs.  It also opens some files and reads them - even
> > decompressing random .gz files along the way!
> 
> Are you sure that it is actually decompressing files and not just
> identifying them?

Ah okay, it reads just one block to check its file magic, I think.

> Anyway, I've just pushed another patch to filter by filenames before
> looking at content. This should further improve the situation.

I don't think it worked?  It's still doing as before, looking at
text, gzip files and validating the sha1sums in a .buildinfo:

| DEBUG Looking for a dbgsym package for Build Id 4bfc8175c9c53156a7e20d0216bc9fff0d25ae2a (debuglink: fc8175c9c53156a7e20d0216bc9fff0d25ae2a.debug)
| DEBUG Using TextFile for a/build/.bash_logout
| DEBUG Using TextFile for a/build/.bashrc
| DEBUG Using TextFile for a/build/.profile
| DEBUG Using DebFile for a/build/cpp-4.9-dbgsym_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/cpp-4.9_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/g++-4.9-dbgsym_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/g++-4.9-multilib_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/g++-4.9_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-base_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-dbgsym_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-locales_4.9.3-11_all.deb
| DEBUG Using DebFile for a/build/gcc-4.9-multilib_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-plugin-dev-dbgsym_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-plugin-dev_4.9.3-11_kfreebsd-amd64.deb
| DEBUG Using DebFile for a/build/gcc-4.9-source_4.9.3-11_all.deb
| DEBUG Using GzipFile for a/build/gcc-4.9_4.9.3-11.diff.gz
| DEBUG Using DotDscFile for a/build/gcc-4.9_4.9.3-11.dsc
| DEBUG Using DotBuildinfoFile for a/build/gcc-4.9_4.9.3-11_kfreebsd-amd64.buildinfo
| DEBUG validating sha1 checksums

and I'm pretty sure I used current Git master:

| grep -n -C2 irrelevant /usr/lib/python3/dist-packages/diffoscope/comparators/deb.py 
| 40-    for member_name, member in container.get_members().items():
| 41-        # Let's assume the name will end with .deb to avoid looking at
| 42:        # too many irrelevant files
| 43-        if not member_name.endswith('.deb'):
| 44-            continue

Regards,
-- 
Steven Chamberlain
steven at pyro.eu.org
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