Change in flashrom[master]: [WIP] git-hooks: Fix install script for various git versions

[Nico Huber (Code Review)]

Nico Huber has uploaded this change for review. ( https://review.coreboot.org/22971

Change subject: [WIP] git-hooks: Fix install script for various git versions
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[WIP] git-hooks: Fix install script for various git versions

Change-Id: I7ee8d4d54db48f7207fe8abf895c7fbba7685ad2
Signed-off-by: Nico Huber 
---
M util/git-hooks/install.sh
1 file changed, 15 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/71/22971/1

diff --git a/util/git-hooks/install.sh b/util/git-hooks/install.sh
index d557c2f..44ccc94 100755
--- a/util/git-hooks/install.sh
+++ b/util/git-hooks/install.sh
@@ -3,10 +3,23 @@
 root=$(git rev-parse --show-cdup 2>/dev/null) || \
      { echo "Not under git control. Cannot install git hooks." >&2 ; exit 0 ; }

-dst="${root}"$(git rev-parse --git-path hooks/)
 src=util/git-hooks/ # relative to root
 hooks=$(cd "${root}${src}" && git ls-files -c | grep -Ev 'install.sh|wrapper.sh')

+if [ $(git rev-parse --git-path 2>/dev/null) = "--git-path" ]; then
+	# very old git, we have to guess
+	dst="${root}.git/hooks/"
+	rel="../../"
+elif [ $(cd "${root}${src}" && git rev-parse --git-path .) = \
+		$(cd "${root}" && git rev-parse --git-path .) ]; then
+	# broken --git-path
+	dst="${root}"$(git rev-parse --git-path hooks/)
+	rel=$(git rev-parse --prefix $(git rev-parse --git-path hooks/) --show-cdup)
+else
+	dst=$(git rev-parse --git-path hooks/)
+	rel=$(git rev-parse --prefix "${dst}" --show-cdup)
+fi
+
 for h in $hooks; do
    # Test if hook is not already installed, i.e. doesn't point at the wrapper
    if [ ! "${dst}$h" -ef "${root}${src}wrapper.sh" ]; then
@@ -14,7 +27,6 @@
    	if [ -e "${dst}$h" ]; then
    		mv "${dst}$h" "${dst}$h.local"
    	fi
-		ln -s "$(git rev-parse --prefix $(git rev-parse --git-path hooks/) --show-cdup)${src}wrapper.sh" \
-		      "${dst}$h"
+		ln -s "${rel}${src}wrapper.sh" "${dst}$h"
    fi
 done