summaryrefslogtreecommitdiff
path: root/CREDITS-GEN
blob: d1b0f86355ed8e37abe7eefcd2eabddee861178d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
#!/bin/sh
 
CF=CREDITS-FILE
tip=
 
tree_search ()
{
	head=$1
	tree=$2
	for p in $(git rev-list --parents --max-count=1 $head 2>/dev/null)
	do
		test $tree = $(git rev-parse $p^{tree} 2>/dev/null) &&
		vn=$(git describe --abbrev=4 $p 2>/dev/null) &&
		case "$vn" in
		gitgui-[0-9]*) echo $p; break;;
		esac
	done
}
 
generate_credits ()
{
	tip=$1 &&
	rm -f "$2" &&
	git shortlog -n -s $tip | sed 's/: .*$//' >"$2" || exit
}
 
# Always use the tarball credits file if found, just
# in case we are somehow contained in a larger git
# repository that doesn't actually track our state.
# (At least one package manager is doing this.)
#
# We may be a subproject, so try looking for the merge
# commit that supplied this directory content if we are
# not at the toplevel.  We probably will always be the
# second parent in the commit, but we shouldn't rely on
# that fact.
#
 
credits_tmp=/var/tmp/gitgui-credits-$$
trap 'rm -f "$credits_tmp"' 0
 
orig="$credits_tmp"
 
if test -f credits
then
	orig=credits
elif prefix="$(git rev-parse --show-prefix 2>/dev/null)" &&
   test -n "$prefix" &&
   head=$(git rev-list --max-count=1 HEAD -- . 2>/dev/null) &&
   tree=$(git rev-parse --verify "HEAD:$prefix" 2>/dev/null) &&
   tip=$(tree_search $head $tree) &&
   test -n "$tip"
then
	generate_credits $tip "$orig" || exit
elif tip="$(git rev-parse --verify HEAD 2>/dev/null)" &&
   test -n "$tip"
then
	generate_credits $tip "$orig" || exit
else
	echo "error: Cannot locate authorship information." >&2
	exit 1
fi
 
if test -f "$orig" && cmp -s "$orig" "$CF"
then
	: noop
else
	rm -f "$CF" &&
	cat "$orig" >"$CF"
fi