From: "Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>
To: git@vger.kernel.org
Cc: Luke Shumaker <lukeshu@lukeshu.com>,
Johannes Schindelin <johannes.schindelin@gmx.de>,
Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: [PATCH v2 1/2] subtree: fix the GIT_EXEC_PATH sanity check to work on Windows
Date: Mon, 14 Jun 2021 12:41:52 +0000 [thread overview]
Message-ID: <5f2d9434b4ebb66131ea2fb9fbb62d6338af1294.1623674513.git.gitgitgadget@gmail.com> (raw)
In-Reply-To: <pull.978.v2.git.1623674513.gitgitgadget@gmail.com>
From: Johannes Schindelin <johannes.schindelin@gmx.de>
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>
---
contrib/subtree/git-subtree.sh | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/contrib/subtree/git-subtree.sh b/contrib/subtree/git-subtree.sh
index b06782bc7955..3935cea7dd13 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.'
--
gitgitgadget
next prev parent reply other threads:[~2021-06-14 12:43 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-10 9:13 [PATCH 0/2] Fix git subtree on Windows Johannes Schindelin via GitGitGadget
2021-06-10 9:13 ` [PATCH 1/2] subtree: fix the GIT_EXEC_PATH sanity check to work " Johannes Schindelin via GitGitGadget
2021-06-11 0:40 ` Luke Shumaker
2021-06-11 1:37 ` Junio C Hamano
2021-06-11 4:31 ` Luke Shumaker
2021-06-11 10:19 ` Johannes Schindelin
2021-06-11 13:41 ` Luke Shumaker
2021-06-14 11:56 ` Johannes Schindelin
2021-06-15 2:33 ` Junio C Hamano
2021-06-15 10:56 ` Jeff King
2021-06-15 11:05 ` Bagas Sanjaya
2021-06-15 11:18 ` Jeff King
2021-06-15 11:27 ` Johannes Schindelin
2021-06-16 0:52 ` Junio C Hamano
2021-06-16 7:49 ` Jeff King
2021-06-10 9:13 ` [PATCH 2/2] subtree: fix assumption about the directory separator Johannes Schindelin via GitGitGadget
2021-06-11 1:02 ` Luke Shumaker
2021-06-11 10:35 ` Johannes Schindelin
2021-06-11 0:58 ` [PATCH 0/2] Fix git subtree on Windows Luke Shumaker
2021-06-11 10:30 ` Johannes Schindelin
2021-06-11 13:46 ` Luke Shumaker
2021-06-11 15:50 ` Felipe Contreras
2021-06-12 2:58 ` Luke Shumaker
2021-06-14 12:41 ` [PATCH v2 " Johannes Schindelin via GitGitGadget
2021-06-14 12:41 ` Johannes Schindelin via GitGitGadget [this message]
2021-06-15 2:37 ` [PATCH v2 1/2] subtree: fix the GIT_EXEC_PATH sanity check to work " Junio C Hamano
2021-06-14 12:41 ` [PATCH v2 2/2] subtree: fix assumption about the directory separator Johannes Schindelin via GitGitGadget
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