bug: git fast-import should ignore configuration variable core.ignorecase (plain text format)

["Philippe Martens" <philippe.martens@metrum.lu>]

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Hello,

I’m not quite sure if this is to be considered a Windows specific bug. I’m
using Git-1.7.10-preview20120409 on Windows, but the problem exists in
previous versions.

When fast-exporting | fast-importing on Windows a repository with case only
renames, the resulting repository isn’t a copy of the initial repository.
This is because Windows repositories are created with core.ignorecase = true
by default.

The included script shows the problem: it creates a repository with
SomeFile.txt renamed to SOMEFILE.txt, then fast-export it and fast-import it
in two different repositories, with core.ignorecase=false and
core.ignorecase=true. The sha-1 of the second commit in the repository with
core.ignorecase=true is different from the initial repository because the
rename is ignored.
The situation is worse without rename detection on fast-export : the rename
becomes a delete.

I think the configuration variable core.ignorecase should be ignored by
fast-import, and case always taken into account in that case.

Kind regards,

Philippe Martens
Lead Architect

METRUM
Rue du Kiem, 163
L-8030 Strassen
Tél : +352 26 00 87 01
Fax : +352 26 00 87 02
GSM : +352 661 26 00 37
Email : philippe.martens@metrum.lu
Web : www.metrum.lu

[-- Attachment #2: test-fast-import.sh --]
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git init export
cd export
git config core.ignorecase true
echo "With some content in it..." > SomeFile.txt
git add .
git commit -m "Add some file"
git mv -f SomeFile.txt SOMEFILE.txt
git commit -m "Rename it (case only)"
git fast-export --all -M -C > ../git.fast-export
git log --oneline

git init ../ignorecase.false
cd ../ignorecase.false
git config core.ignorecase false
git fast-import --quiet < ../git.fast-export
git log --oneline

git init ../ignorecase.true
cd ../ignorecase.true
git config core.ignorecase true
git fast-import --quiet < ../git.fast-export
git log --oneline
cd ..