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07d082bf5b
When we are included as a subproject, such as how git.git carries us, we want to retain our own version number and not the version number assigned by git.git's own tags. Consequently we need to locate the correct tag which applies to our tree content and its commit lineage. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
78 lines
1.6 KiB
Bash
Executable File
78 lines
1.6 KiB
Bash
Executable File
#!/bin/sh
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GVF=GIT-VERSION-FILE
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DEF_VER=0.5.GIT
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LF='
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'
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tree_search ()
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{
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head=$1
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tree=$2
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for p in $(git rev-list --parents --max-count=1 $head 2>/devnull)
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do
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test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
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vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
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case "$vn" in
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gitgui-[0-9]*) echo $vn; break;;
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esac
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done
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}
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# We may be a subproject, so try looking for the merge
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# commit that supplied this directory content if we are
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# not at the toplevel. We probably will always be the
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# second parent in the commit, but we shouldn't rely on
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# that fact.
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#
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# If we are at the toplevel or the merge assumption fails
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# try looking for a gitgui-* tag, or fallback onto the
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# distributed version file.
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if prefix="$(git rev-parse --show-prefix 2>/dev/null)"
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test -n "$prefix" &&
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head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
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tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
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VN=$(tree_search $head $tree)
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case "$VN" in
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gitgui-[0-9]*) : happy ;;
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*) (exit 1) ;;
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esac
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then
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VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
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elif VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
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case "$VN" in
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gitgui-[0-9]*) : happy ;;
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*) (exit 1) ;;
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esac
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then
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VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
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elif test -f version
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then
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VN=$(cat version) || VN="$DEF_VER"
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else
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VN="$DEF_VER"
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fi
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dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
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case "$dirty" in
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'')
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;;
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*)
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VN="$VN-dirty" ;;
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esac
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if test -r $GVF
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then
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VC=$(sed -e 's/^GITGUI_VERSION = //' <$GVF)
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else
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VC=unset
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fi
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test "$VN" = "$VC" || {
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echo >&2 "GITGUI_VERSION = $VN"
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echo "GITGUI_VERSION = $VN" >$GVF
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}
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