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| author |  Johannes Schindelin <johannes.schindelin@gmx.de> | 2021-06-14 12:41:52 +0000 |
|---|---|---|
| committer |  Junio C Hamano <gitster@pobox.com> | 2021-06-15 11:38:26 +0900 |
| commit | f7ee88f1d09ce47b8e12b52a2f19c7867ae10b29 (patch) | |
| tree | d36da1888f7454daec5433e441defe7eee38fb1f | |
| parent | Git 2.32 (diff) | |
| download | tgif-f7ee88f1d09ce47b8e12b52a2f19c7867ae10b29.tar.xz | |
subtree: fix the GIT_EXEC_PATH sanity check to work on Windows
In 22d550749361 (subtree: don't fuss with PATH, 2021-04-27), `git
subtree` was broken thoroughly on Windows.
The reason is that it assumes Unix semantics, where `PATH` is
colon-separated, and it assumes that `$GIT_EXEC_PATH:` is a verbatim
prefix of `$PATH`. Neither are true, the latter in particular because
`GIT_EXEC_PATH` is a Windows-style path, while `PATH` is a Unix-style
path list.
Let's make extra certain that `$GIT_EXEC_PATH` and the first component
of `$PATH` refer to different entities before erroring out.
We do that by using the `test <path1> -ef <path2>` command that verifies
that the inode of `<path1>` and of `<path2>` is the same.
Sadly, this construct is non-portable, according to
https://pubs.opengroup.org/onlinepubs/009695399/utilities/test.html.
However, it does not matter in practice because we still first look
whether `$GIT_EXEC_PREFIX` is string-identical to the first component of
`$PATH`. This will give us the expected result everywhere but in Git for
Windows, and Git for Windows' own Bash _does_ handle the `-ef` operator.
Just in case that we _do_ need to show the error message _and_ are
running in a shell that lacks support for `-ef`, we simply suppress the
error output for that part.
This fixes https://github.com/git-for-windows/git/issues/3260
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
| -rwxr-xr-x | contrib/subtree/git-subtree.sh | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh index b06782bc79..3935cea7dd 100755 --- a/contrib/subtree/git-subtree.sh +++ b/contrib/subtree/git-subtree.sh @@ -5,7 +5,10 @@ # Copyright (C) 2009 Avery Pennarun <apenwarr@gmail.com> # -if test -z "$GIT_EXEC_PATH" || test "${PATH#"${GIT_EXEC_PATH}:"}" = "$PATH" || ! test -f "$GIT_EXEC_PATH/git-sh-setup" +if test -z "$GIT_EXEC_PATH" || ! test -f "$GIT_EXEC_PATH/git-sh-setup" || { + test "${PATH#"${GIT_EXEC_PATH}:"}" = "$PATH" && + test ! "$GIT_EXEC_PATH" -ef "${PATH%%:*}" 2>/dev/null +} then echo >&2 'It looks like either your git installation or your' echo >&2 'git-subtree installation is broken.' |