Jens LehmannSince 69c3051 (submodules: refactor computation of relative gitdir path) cloning a submodule recursively fails for nested submodules when a symbolic link is part of the path to the work tree of the superproject.
This happens when module_clone() tries to find the relative paths between the work tree and the git dir. When a symbolic link in current $PWD points to a directory that is at a different level, then determining the number of "../" needed to traverse to the superproject's work tree leads to a wrong result.
As there is no portable way to say "pwd -P", use cd_to_toplevel to remove the link from $PWD, which fixes this problem.
A test for this issue has been added to t7406.
Reported-by: Bob Halley <halley@play-bow.org> Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> ---
The changes in this version are: - the SYMLINKS prerequisite is used for the new test - a comment explaining why cd_to_toplevel is needed has been added - small updates to the commit message
Thanks to J6t for the input.
git-submodule.sh | 6 ++++-- t/t7406-submodule-update.sh | 13 +++++++++++++ 2 files changed, 17 insertions(+), 2 deletions(-)
Show changes to 2 files +17 −2
git-submodule.sh, t/t7406-submodule-update.sh
diff --git a/git-submodule.sh b/git-submodule.sh index 5629d87..dba4d39 100755 --- a/git-submodule.sh +++ b/git-submodule.sh @@ -186,8 +186,10 @@ module_clone() die "$(eval_gettext "Clone of '\$url' into submodule path '\$sm_path' failed")" fi - a=$(cd "$gitdir" && pwd)/ - b=$(cd "$sm_path" && pwd)/ + # We already are at the root of the work tree but cd_to_toplevel will + # resolve any symlinks that might be present in $PWD + a=$(cd_to_toplevel && cd "$gitdir" && pwd)/ + b=$(cd_to_toplevel && cd "$sm_path" && pwd)/ # normalize Windows-style absolute paths to POSIX-style absolute paths case $a in [a-zA-Z]:/*) a=/${a%%:*}${a#*:} ;; esac case $b in [a-zA-Z]:/*) b=/${b%%:*}${b#*:} ;; esac diff --git a/t/t7406-submodule-update.sh b/t/t7406-submodule-update.sh index dcb195b..ce61d4c 100755 --- a/t/t7406-submodule-update.sh +++ b/t/t7406-submodule-update.sh @@ -636,4 +636,17 @@ test_expect_success 'submodule update properly revives a moved submodule' ' ) ' +test_expect_success SYMLINKS 'submodule update can handle symbolic links in pwd' ' + mkdir -p linked/dir && + ln -s linked/dir linkto && + ( + cd linkto && + git clone "$TRASH_DIRECTORY"/super_update_r2 super && + ( + cd super && + git submodule update --init --recursive + ) + ) +' + test_done
-- 1.7.11.1.166.gf56d108