git-gui: Add a --trace command line option
[git/git.git] / GIT-VERSION-GEN
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1#!/bin/sh
2
3GVF=GIT-VERSION-FILE
3d654be4 4DEF_VER=0.10.GITGUI
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5
6LF='
7'
8
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9tree_search ()
10{
11 head=$1
12 tree=$2
022fef30 13 for p in $(git rev-list --parents --max-count=1 $head 2>/dev/null)
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14 do
15 test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
16 vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
17 case "$vn" in
18 gitgui-[0-9]*) echo $vn; break;;
19 esac
20 done
21}
22
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23# Always use the tarball version file if found, just
24# in case we are somehow contained in a larger git
25# repository that doesn't actually track our state.
26# (At least one package manager is doing this.)
27#
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28# We may be a subproject, so try looking for the merge
29# commit that supplied this directory content if we are
30# not at the toplevel. We probably will always be the
31# second parent in the commit, but we shouldn't rely on
32# that fact.
33#
34# If we are at the toplevel or the merge assumption fails
26370f73 35# try looking for a gitgui-* tag.
07d082bf 36
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37if test -f version &&
38 VN=$(cat version)
39then
40 : happy
41elif prefix="$(git rev-parse --show-prefix 2>/dev/null)"
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42 test -n "$prefix" &&
43 head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
44 tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
45 VN=$(tree_search $head $tree)
46 case "$VN" in
47 gitgui-[0-9]*) : happy ;;
48 *) (exit 1) ;;
49 esac
50then
51 VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
52elif VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
f1cee4e6 53 case "$VN" in
6a6459bc 54 gitgui-[0-9]*) : happy ;;
07d082bf 55 *) (exit 1) ;;
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56 esac
57then
6a6459bc 58 VN=$(echo "$VN" | sed -e 's/^gitgui-//;s/-/./g');
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59else
60 VN="$DEF_VER"
61fi
62
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63dirty=$(sh -c 'git diff-index --name-only HEAD' 2>/dev/null) || dirty=
64case "$dirty" in
65'')
66 ;;
67*)
68 VN="$VN-dirty" ;;
69esac
70
71if test -r $GVF
72then
7e81d4ee 73 VC=$(sed -e 's/^GITGUI_VERSION = //' <$GVF)
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74else
75 VC=unset
76fi
77test "$VN" = "$VC" || {
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78 echo >&2 "GITGUI_VERSION = $VN"
79 echo "GITGUI_VERSION = $VN" >$GVF
f1cee4e6 80}