submodules: don't stumble over symbolic links when cloning recursively
Since 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 $PWD, which fixes this problem.
A test for this issue has been added to t7406.
Reported-by: Bob Halley <halley@play-bow.org>
Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-submodule.sh b/git-submodule.sh
index 3d94a14..61f3b72 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -149,8 +149,10 @@
die "$(eval_gettext "Clone of '\$url' into submodule path '\$path' failed")"
fi
- a=$(cd "$gitdir" && pwd)/
- b=$(cd "$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 "$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
