summaryrefslogtreecommitdiff
path: root/src/diffpkg.in
blob: b964d444cdad943f2c207a8d1212d6879f2a40bd (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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
#!/bin/bash
#
# SPDX-License-Identifier: GPL-3.0-or-later

shopt -s extglob

m4_include(lib/common.sh)

usage() {
    cat <<- _EOF_
		Usage: ${BASH_SOURCE[0]##*/} [OPTIONS] [MODES] [FILE|PKGNAME...]

		Searches for a locally built package corresponding to the PKGBUILD, and
		downloads the last version of that package from the Pacman repositories.
		It then compares the package archives using different modes while using
		simple tar content list by default.

		When given one package, use it to diff against the locally built one.
		When given two packages, diff both packages against each other.

		In either case, a package name will be converted to a filename from the
		cache, and diffpkg will proceed as though this filename was initially
		specified.

		OPTIONS
		    -M, --makepkg-config Set an alternate makepkg configuration file
		    -P, --pool=DIR       Search diff target in pool dir (default '/srv/ftp/pool')
		    -v, --verbose        Provide more detailed/unfiltered output
		    -h, --help           Show this help text

		OUTPUT OPTIONS
		    --color[=WHEN]       Color output; WHEN is 'never', 'always', or 'auto';
		                         Plain --color means --color='auto'
		    -u, -U, --unified    Output 3 lines of unified context
		    -y, --side-by-side   Output in two columns
		    -W, --width=NUM      Output at most NUM (default 'auto') print columns
		                         NUM can be 'auto', 'columns' or a number

		MODES
		    -l, --list           Activate content list diff mode (default)
		    -d, --diffoscope     Activate diffoscope diff mode
		    -p, --pkginfo        Activate .PKGINFO diff mode
		    -b, --buildinfo      Activate .BUILDINFO diff mode
_EOF_
}

MAKEPKG_CONF=/etc/makepkg.conf
POOLDIR=/srv/ftp/pool

VERBOSE=0
TARLIST=0
DIFFOSCOPE=0
PKGINFO=0
BUILDINFO=0

DIFFMODE=--side-by-side
DIFFCOLOR=--color
DIFFWIDTH=--width=auto
DIFFOPTIONS=(--expand-tabs)

# option checking
while (( $# )); do
	case $1 in
		-h|--help)
			usage
			exit 0
			;;
		-M|--makepkg-config)
			(( $# <= 1 )) && die "missing argument for %s" "$1"
			MAKEPKG_CONF="$2"
			shift 2
			;;
		-l|--list)
			TARLIST=1
			shift
			;;
		-d|--diffoscope)
			DIFFOSCOPE=1
			shift
			;;
		-p|--pkginfo)
			PKGINFO=1
			shift
			;;
		-b|--buildinfo)
			BUILDINFO=1
			shift
			;;
		-v|--verbose)
			VERBOSE=1
			shift
			;;
		-u|-U|--unified)
			DIFFMODE=--unified
			shift
			;;
		-y|--side-by-side)
			DIFFMODE=--side-by-side
			shift
			;;
		--color|--color=*)
			if [[ $2 == never || $2 == always || $2 == auto ]]; then
				DIFFCOLOR="--color=$2"
				shift 2
				continue
			fi
			DIFFCOLOR="$1"
			shift
			;;
		-W|--width)
			(( $# <= 1 )) && die "missing argument for %s" "$1"
			DIFFWIDTH="--width=$2"
			shift 2
			;;
		--width=*)
			DIFFWIDTH="$1"
			shift
			;;
		-P|--pool)
			(( $# <= 1 )) && die "missing argument for %s" "$1"
			POOLDIR="$2"
			shift 2
			;;
		--pool=*)
			POOLDIR="${1#*=}"
			shift
			;;
		--)
			shift
			break
			;;
		-*|--*)
			die "invalid argument: %s" "$1"
			;;
		*)
			break
			;;
	esac
done

# Set options based on flags or magic values
if (( VERBOSE )); then
	if [[ $DIFFMODE == --unified ]]; then
		DIFFMODE="--unified=99999"
	fi
else
	DIFFOPTIONS+=(--suppress-common-lines)
fi
if [[ $DIFFWIDTH == --width=columns ]]; then
	DIFFWIDTH="--width=${COLUMNS:-130}"
fi
if [[ $DIFFWIDTH != --width=auto ]]; then
	DIFFOPTIONS+=("${DIFFWIDTH}")
fi
DIFFOPTIONS+=("${DIFFMODE}" "${DIFFCOLOR}")

if ! (( DIFFOSCOPE || TARLIST || PKGINFO || BUILDINFO )); then
	TARLIST=1
fi

# Source makepkg.conf; fail if it is not found
if [[ -r "${MAKEPKG_CONF}" ]]; then
	# shellcheck source=config/makepkg/x86_64.conf
	source "${MAKEPKG_CONF}"
else
	die "${MAKEPKG_CONF} not found!"
fi

# Source user-specific makepkg.conf overrides
if [[ -r "${XDG_CONFIG_HOME:-$HOME/.config}/pacman/makepkg.conf" ]]; then
	# shellcheck source=/dev/null
	source "${XDG_CONFIG_HOME:-$HOME/.config}/pacman/makepkg.conf"
elif [[ -r "$HOME/.makepkg.conf" ]]; then
	# shellcheck source=/dev/null
	source "$HOME/.makepkg.conf"
fi

STARTDIR=$(pwd)
trap 'rm -rf $TMPDIR' EXIT INT TERM QUIT
TMPDIR=$(mktemp -d --tmpdir diffpkg-script.XXXXXXXX)
export TMPDIR

tar_list() {
	bsdtar tf "$*" | if (( VERBOSE )); then
		cat
	else
		sed -E 's|^usr/lib/modules/[0-9][^/]+|usr/lib/modules/[…]|g'
	fi | sort
}

file_line_length() {
	path="$1"
	wc -L "${path}" | tail -n1 | sed -E 's/^ +//g' | cut -d' ' -f1
}

file_diff_columns() {
	file1="$1"
	file2="$2"
	file1_length=$(file_line_length "$file1")
	file2_length=$(file_line_length "$file2")
	echo $(( file1_length + file2_length + 3 ))
}

diff_pkgs() {
	local oldpkg newpkg
	oldpkg=$(readlink -m "$1")
	newpkg=$(readlink -m "$2")

	[[ -f $oldpkg ]] || die "No such file: %s" "${oldpkg}"
	[[ -f $newpkg ]] || die "No such file: %s" "${newpkg}"

	DIFFOPTIONS+=(--label "${oldpkg}" --label "${newpkg}")

	if (( TARLIST )); then
		tar_list "$oldpkg" > "$TMPDIR/old"
		tar_list "$newpkg" > "$TMPDIR/new"
	fi

	if (( PKGINFO )); then
		bsdtar xOqf "$oldpkg" .PKGINFO > "$TMPDIR/old"
		bsdtar xOqf "$newpkg" .PKGINFO > "$TMPDIR/new"
	fi

	if (( BUILDINFO )); then
		bsdtar xOqf "$oldpkg" .BUILDINFO > "$TMPDIR/old"
		bsdtar xOqf "$newpkg" .BUILDINFO > "$TMPDIR/new"
	fi

	if (( TARLIST || PKGINFO || BUILDINFO )); then
		# Resolve dynamic auto width one we know the content to diff
		if [[ $DIFFWIDTH == --width=auto ]]; then
			AUTOLENGTH=$(file_diff_columns "$TMPDIR/old" "$TMPDIR/new")
			DIFFOPTIONS+=("--width=${AUTOLENGTH}")
		fi

		# Print a header for side-by-side view as it lacks labels
		if [[ $DIFFMODE == --side-by-side ]]; then
			printf -- "--- %s\n+++ %s\n" "${oldpkg}" "${newpkg}"
		fi

		diff "${DIFFOPTIONS[@]}" "$TMPDIR/old" "$TMPDIR/new"
	fi

	if (( DIFFOSCOPE )); then
		diffoscope "$oldpkg" "$newpkg"
	fi
}

fetch_pkg() {
	local pkg pkgdest pkgurl
	case $1 in
		*://*)
			pkgurl=$1 ;;
		/*|*/*)
			pkgurl=$(readlink -m "$1") ;;
		*.pkg.tar*)
			pkgurl=$1 ;;
		'')
			;;
		*)
			pkg=$1 ;;
	esac

	if [[ -z ${pkgurl} ]]; then
		# Try to find latest package in pool dir
		if [[ -d ${POOLDIR} ]]; then
			shopt -s extglob nullglob
			pkgurl=$(printf "%s\n" "${POOLDIR}"/*/"${_pkgname}"-!(*-*)-!(*-*)-!(*-*).pkg.tar!(*.sig)|sort -Vr|head -1)
			shopt -u extglob nullglob
		fi
		# Search via pacman database if no pool file exists
		if [[ ! -f ${pkgurl} ]]; then
			pkgurl=$(pacman -Spdd --print-format '%l' --noconfirm "$pkg") ||
				die "Couldn't download previous package for %s." "$pkg"
		fi
	fi

	pkg=${pkgurl##*/}
	pkgdest=$(mktemp -t -d "${pkg}-XXXXXX")/${pkg}

	if [[ $pkgurl = file://* || ( $pkgurl = /* && -f $pkgurl ) ]]; then
		ln -sf "${pkgurl#file://}" "$pkgdest"
	elif [[ -f "$PKGDEST/$pkg" ]]; then
		ln -sf "$PKGDEST/$pkg" "$pkgdest"
	elif [[ -f "$STARTDIR/$pkg" ]]; then
		ln -sf "$STARTDIR/$pkg" "$pkgdest"
	elif [[ $pkgurl = *://* ]]; then
		curl -fsLC - --retry 3 --retry-delay 3 -o "$pkgdest" "$pkgurl" || \
			die "Couldn't download %s" "$pkgurl"
	else
		die "File not found: %s" "$pkgurl"
	fi

	echo "$pkgdest"
}

if (( $# < 2 )); then
	if [[ ! -f PKGBUILD ]]; then
		die "This must be run in the directory of a built package.\nTry '$(basename "$0") --help' for more information."
	fi

	# shellcheck source=contrib/makepkg/PKGBUILD.proto
	. ./PKGBUILD
	if [[ ${arch[0]} == 'any' ]]; then
		CARCH='any'
	fi

	for _pkgname in "${pkgname[@]}"; do
		comparepkg=$_pkgname
		pkgurl=
		target_pkgver=$(get_full_version "$_pkgname")
		if ! pkgfile=$(find_cached_package "$_pkgname" "$target_pkgver" "$CARCH"); then
			die 'tarball not found for package: %s' "${_pkgname}-$target_pkgver"
		fi

		ln -s "$pkgfile" "$TMPDIR"

		if (( $# )); then
			comparepkg="$1"
		fi

		oldpkg=$(fetch_pkg "$comparepkg") || exit 1

		diff_pkgs "$oldpkg" "$pkgfile"
	done
else
	file1=$(fetch_pkg "$1") || exit 1
	file2=$(fetch_pkg "$2") || exit 1

	diff_pkgs "$file1" "$file2"
fi