好的，所以，我花了一点时间和精力在 MacOS 上进行了测试，它在折叠情况下也有类似的问题。
我不知道所有版本的 git 是否“足够相同”和/或 Windows git 的工作方式是否相同，但这个脚本确实可以解决问题，无需比ls-tree -r 更深入地了解 git 管道和cat-file 和rm --cached。
该脚本也只是经过轻微测试。 （注意：标签被打碎了，cmd-C/cmd-V 粘贴了标签，但我不得不缩进stackoverflow。所以文件缩进在下面搞砸了......懒得在这里修复。）
#! /bin/bash
usage()
{
cat << EOF
usage: $0 [-h] [-r] [branch]
-h: print usage help
-r: rename ALL colliding files to their hashes
EOF
}
DO_RENAME=false
while getopts "hr" opt; do
case $opt in
h) usage; exit 0;;
r) DO_RENAME=true;;
*) usage 1>&2; exit 1;;
esac
done
shift $(($OPTIND - 1))
case $# in
0) branch=HEAD;;
1) branch=$1;;
*) usage
esac
# literal tab, so that it's easily distinguished from spaces
TAB=$(printf \\t)
branch=$(git rev-parse --symbolic $branch) || exit
tempfile=$(mktemp -t git-casecoll)
trap "rm -f $tempfile; exit 0" 0
trap "rm -f $tempfile; exit 1" 1 2 3 15
# First, let's find out whether there *are* any file name
# case collisions in the tree.
git ls-tree -r $branch > $tempfile
nfiles=$(wc -l < $tempfile | sed 's/ *//g')
n2=$(sort "-t$TAB" -k2 -f -u $tempfile | wc -l | sed 's/ *//g')
if [ $nfiles -eq $n2 ]; then
echo no collisions found
exit 0
fi
echo "$(($nfiles - $n2)) collision(s) found"
# functions needed below
# decode git escapes in pathnames
decode_git_pathname()
{
local path="$1"
case "$path" in
\"*\")
# strip off leading and trailing double quotes
path=${path#\"}
path=${path%\"}
# change % into %%
path=${path/\%/%%}
# and then interpret backslashes with printf
printf -- "$path";;
*)
# not encoded, just print it as is
printf %s "$path";;
esac
}
show_or_do_rename()
{
local mode=$1 path="$(decode_git_pathname "$2")" sha1=$3
local renamed_to="$(dirname "$path")/$sha1"
local ftype=${mode:0:2}
if [ $ftype != 10 ]; then
echo "WARNING: I don't handle $ftype files ($mode $path) yet"
return 1
fi
if $DO_RENAME; then
# git mv does not work, but git rm --cached does
git rm --cached --quiet "$path"
rm -f "$path"
git cat-file -p $sha1 > "$renamed_to"
chmod ${mode:2} "$renamed_to"
git add "$renamed_to"
echo "renamed: $path => $renamed_to"
else
if [ $ftype != 10 ]; then
echo "# I don't handle extracting a $ftype file ($mode) yet"
else
echo will: mv "$path" "$renamed_to"
fi
fi
}
# Now we have to find which ones they were, which is more difficult.
# We still want the sorted ones with case folded, but we don't want
# to remove repeats, instead we want to detect them as we go.
#
# Note that Dir/file collides with both dir/file and dir/File,
# so if we're doing rename ops, we'll rename all three. We also
# don't know if we're in a collision-group until we hit the second
# entry, so the first time we start doing a collision-group, we
# must rename two files, and from then on (in the same group) we
# only rename one.
prevpath=""
prevlow=""
prevsha=
in_coll=false
sort -f $tempfile |
while IFS="$TAB" read -r info git_path; do
set -- $info
mode=$1
# otype=$2 -- we don't care about the object type?
# it should always be "blob"
sha1=$3
lowered="$(printf %s "$git_path" | tr '[:upper:]' '[:lower:]')"
if [ "$prevlow" = "$lowered" ]; then
if $in_coll; then
echo " and: $prevpath vs $git_path"
show_or_do_rename $mode "$git_path" $sha1
else
echo "collision: $prevpath vs $git_path"
show_or_do_rename $mode "$prevpath" $prevsha
show_or_do_rename $mode "$git_path" $sha1
in_coll=true
fi
else
prevlow="$lowered"
prevpath="$git_path"
prevsha=$sha1
in_coll=false
fi
done
这是一个示例运行。我在 Linux 机器上创建了一个“对 Windows 不利”的存储库，然后将其克隆到 Mac。
$ git clone ...
Initialized empty Git repository in /private/tmp/caseissues/.git/
remote: Counting objects: 16, done.
remote: Compressing objects: 100% (8/8), done.
remote: Total 16 (delta 1), reused 0 (delta 0)
Receiving objects: 100% (16/16), done.
Resolving deltas: 100% (1/1), done.
$ cd caseissues
$ git status
# On branch master
# Changed but not updated:
# (use "git add <file>..." to update what will be committed)
# (use "git checkout -- <file>..." to discard changes in working directory)
#
# modified: FooBar/readme.txt
#
no changes added to commit (use "git add" and/or "git commit -a")
$ git-casecoll.sh
1 collision(s) found
collision: FooBar/readme.txt vs Foobar/readme.txt
will: mv FooBar/readme.txt FooBar/31892d33f4a57bff0acd064be4bb5a01143dc519
will: mv Foobar/readme.txt Foobar/591415e1e03bd429318f4d119b33cb76dc334772
$ git-casecoll.sh -r
1 collision(s) found
collision: FooBar/readme.txt vs Foobar/readme.txt
renamed: FooBar/readme.txt => FooBar/31892d33f4a57bff0acd064be4bb5a01143dc519
renamed: Foobar/readme.txt => Foobar/591415e1e03bd429318f4d119b33cb76dc334772
$ git status
# On branch master
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# renamed: FooBar/readme.txt -> FooBar/31892d33f4a57bff0acd064be4bb5a01143dc519
# renamed: Foobar/readme.txt -> Foobar/591415e1e03bd429318f4d119b33cb76dc334772
#
（此时我选择我自己的名字来修复这些问题——注意，我让它自动完成，并且不得不再次尝试，手动将 FooBar 中的 b 小写，因为大小写怪异）
$ git mv FooBar/31892d33f4a57bff0acd064be4bb5a01143dc519 FooBar/readme_A.txt
$ git mv FooBar/591415e1e03bd429318f4d119b33cb76dc334772 FooBar/readme_B.txt
fatal: not under version control, source=FooBar/591415e1e03bd429318f4d119b33cb76dc334772, destination=FooBar/readme_B.txt
$ git mv Foobar/591415e1e03bd429318f4d119b33cb76dc334772 FooBar/readme_B.txt
$ git status
# On branch master
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# renamed: FooBar/readme.txt -> FooBar/readme_A.txt
# renamed: Foobar/readme.txt -> FooBar/readme_B.txt
#
$ git commit -m 'fix file name case issue'
[master 4ef3a55] fix file name case issue
2 files changed, 0 insertions(+), 0 deletions(-)
rename FooBar/{readme.txt => readme_A.txt} (100%)
rename Foobar/readme.txt => FooBar/readme_B.txt (100%)