1#!/bin/bash
2#
3# Copyright 2006-2008 (C) Kees Cook <kees@ubuntu.com>
4# Modified by Siegfried-A. Gevatter <rainct@ubuntu.com>
5# Modified by Daniel Hahler <ubuntu@thequod.de>
6#
7# ##################################################################
8#
9# This program is free software; you can redistribute it and/or
10# modify it under the terms of the GNU General Public License
11# as published by the Free Software Foundation; either version 3
12# of the License, or (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful,
15# but WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17# GNU General Public License for more details.
18#
19# See file /usr/share/common-licenses/GPL for more details.
20#
21# ##################################################################
22#
23# By default only the name of the patch system is printed.  Verbose mode can be
24# enabled with -v.
25
26if [ "$1" = "-h" ] || [ "$1" = "--help" ]
27then
28	cat <<EOM
29Usage: $0 [-v]
30
31Run this inside the source directory of a Debian package and it will detect
32the patch system that it uses.
33
34 -v: Enable verbose mode:
35     - Print a list of all those files outside the debian/ directory that have
36       been modified (if any).
37     - Report additional details about patch systems, if available.
38EOM
39	exit 0
40fi
41
42while [ ! -r debian/rules ];
43do
44	if [ "$PWD" = "/" ]; then
45		echo "Can't find debian/rules."
46		exit 1
47	fi
48	cd ..
49done
50
51VERBOSE=0
52if [ "$1" = "-v" ]
53then
54	VERBOSE=1
55fi
56
57if [ "$VERBOSE" -gt 0 ]; then
58	files=`lsdiff -z ../$(dpkg-parsechangelog -SSource)_$(dpkg-parsechangelog -SVersion).diff.gz 2>/dev/null | grep -v 'debian/'`
59	if [ -n "$files" ]
60	then
61		echo "Following files were modified outside of the debian/ directory:"
62		echo "$files"
63		echo "--------------------"
64		echo
65		echo -n "Patch System: "
66	fi
67fi
68
69if grep -qF quilt debian/source/format 2>/dev/null; then
70	echo "quilt"
71	exit 0
72fi
73
74# Do not change the output of existing checks by default, as there are build
75# tools that rely on the exisitng output.  If changes in reporting is needed,
76# please check the "VERBOSE" flag (see below for examples).  Feel free
77# to add new patchsystem detection and reporting.
78for filename in $(echo "debian/rules"; grep ^include debian/rules | grep -vF '$(' | awk '{print $2}')
79do
80	grep -F patchsys.mk "$filename" | grep -q -v "^#" && {
81		if [ "$VERBOSE" -eq 0 ]; then
82			echo "cdbs"; exit 0;
83		else
84			echo "cdbs (patchsys.mk: see 'cdbs-edit-patch')"; exit 0;
85		fi
86	}
87	grep -F quilt "$filename" | grep -q -v "^#" && { echo "quilt"; exit 0; }
88	grep -F dbs-build.mk "$filename" | grep -q -v "^#" && {
89		if [ "$VERBOSE" -eq 0 ]; then
90			echo "dbs"; exit 0;
91		else
92			echo "dbs (see 'dbs-edit-patch')"; exit 0;
93		fi
94	}
95	grep -F dpatch "$filename" | grep -q -v "^#" && {
96		if [ "$VERBOSE" -eq 0 ]; then
97			echo "dpatch"; exit 0;
98		else
99			echo "dpatch (see 'patch-edit-patch')"; exit 0;
100		fi
101	}
102	grep -F '*.diff' "$filename" | grep -q -v "^#" && {
103		if [ "$VERBOSE" -eq 0 ]; then
104			echo "diff splash"; exit 0;
105		else
106			echo "diff splash (check debian/rules)"; exit 0;
107		fi
108	}
109done
110[ -d debian/patches ] || {
111	if [ "$VERBOSE" -eq 0 ]; then
112		echo "patchless?"; exit 0;
113	else
114		echo "patchless? (did not find debian/patches/)"; exit 0;
115	fi
116}
117if [ "$VERBOSE" -eq 0 ]; then
118	echo "unknown patch system"
119else
120	echo "unknown patch system (see debian/patches/ and debian/rules)"
121fi
122