1#!/bin/sh
2
3usage()
4{
5	echo "Usage: $0 [--spec] <target>"
6	exit 2
7}
8
9test -z "$1" && usage
10
11if [ "$1" = "--spec" ] ; then
12	spec_format=1
13	shift
14	test -z "$1" && usage
15fi
16
17TARGET=$1
18
19GIT_DIR=`git rev-parse --git-dir 2>/dev/null`
20
21test -z "$GIT_DIR" && usage
22
23
24export GIT_DIR
25export GIT_PAGER=""
26export PAGER=""
27
28
29mkchlog()
30{
31	target=$1
32	format=$2
33
34	prev_tag=""
35
36	for tag in `git tag -l ${target}-'*'` ; do
37		obj=`git cat-file tag $tag | awk '/^object /{print $2}'`
38		base=`git merge-base $obj HEAD`
39		if [ -z "$base" -o "$base" != $obj ] ; then
40			continue
41		fi
42		all_vers="$prev_tag$tag $all_vers"
43		prev_tag=$tag..
44	done
45
46	if [ -z "$prev_tag" ] ; then
47		all_vers=HEAD
48	else
49		all_vers="${prev_tag}HEAD $all_vers"
50	fi
51
52	for ver in $all_vers ; do
53		log_out=`git log $ver -- $target`
54		if [ -z "$log_out" ] ; then
55			continue
56		fi
57		ver_name=`echo $ver | sed -e 's/^.*\.\.//'`
58		echo ""
59		echo "** Version: $ver_name"
60		echo ""
61		git log --no-merges "${format}" $ver -- $target
62		prev_t=$tag..
63	done
64}
65
66
67if [ -z "$spec_format" ] ; then
68	mkchlog $TARGET --pretty=format:"%ad %an%n%H%n%n* %s%n" \
69		| sed -e 's/^\* /\t* /'
70else
71	echo "%changelog"
72	mkchlog $TARGET --pretty=format:"- %ad %an: %s"
73	echo ""
74fi
75