summaryrefslogtreecommitdiff
path: root/git-am.sh
blob: fd0772d900211557200c542b882ead04842f6628 (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
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
#!/bin/sh
#
#
. git-sh-setup || die "Not a git archive"
 
files=$(git-diff-index --cached --name-only HEAD) || exit
if [ "$files" ]; then
   echo "Dirty index: cannot apply patches (dirty: $files)" >&2
   exit 1
fi
 
usage () {
    echo >&2 "usage: $0 [--signoff] [--dotest=<dir>] [--utf8] [--3way] <mbox>"
    echo >&2 "	or, when resuming"
    echo >&2 "	$0 [--skip]"
    exit 1;
}
 
stop_here () {
    echo "$1" >"$dotest/next"
    exit 1
}
 
go_next () {
	rm -f "$dotest/$msgnum" "$dotest/msg" "$dotest/msg-clean" \
		"$dotest/patch" "$dotest/info"
	echo "$next" >"$dotest/next"
	this=$next
}
 
fall_back_3way () {
    O_OBJECT=`cd "$GIT_OBJECT_DIRECTORY" && pwd`
 
    rm -fr "$dotest"/patch-merge-*
    mkdir "$dotest/patch-merge-tmp-dir"
 
    # First see if the patch records the index info that we can use.
    if git-apply -z --index-info "$dotest/patch" \
	>"$dotest/patch-merge-index-info" 2>/dev/null &&
	GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
	git-update-index -z --index-info <"$dotest/patch-merge-index-info" &&
	GIT_INDEX_FILE="$dotest/patch-merge-tmp-index" \
	git-write-tree >"$dotest/patch-merge-base+" &&
	# index has the base tree now.
	(
	    cd "$dotest/patch-merge-tmp-dir" &&
	    GIT_INDEX_FILE="../patch-merge-tmp-index" \
	    GIT_OBJECT_DIRECTORY="$O_OBJECT" \
	    git-apply --index <../patch
        )
    then
	echo Using index info to reconstruct a base tree...
	mv "$dotest/patch-merge-base+" "$dotest/patch-merge-base"
	mv "$dotest/patch-merge-tmp-index" "$dotest/patch-merge-index"
    else
	# Otherwise, try nearby trees that can be used to apply the
	# patch.
	(
	    N=10
 
	    # Hoping the patch is against our recent commits...
	    git-rev-list --max-count=$N HEAD
 
	    # or hoping the patch is against known tags...
	    git-ls-remote --tags .
	) |
	while read base junk
	do
	    # See if we have it as a tree...
	    git-cat-file tree "$base" >/dev/null 2>&1 || continue
 
	    rm -fr "$dotest"/patch-merge-* &&
	    mkdir "$dotest/patch-merge-tmp-dir" || break
	    (
		cd "$dotest/patch-merge-tmp-dir" &&
		GIT_INDEX_FILE=../patch-merge-tmp-index &&
		GIT_OBJECT_DIRECTORY="$O_OBJECT" &&
		export GIT_INDEX_FILE GIT_OBJECT_DIRECTORY &&
		git-read-tree "$base" &&
		git-apply --index &&
		mv ../patch-merge-tmp-index ../patch-merge-index &&
		echo "$base" >../patch-merge-base
	    ) <"$dotest/patch"  2>/dev/null && break
	done
    fi
 
    test -f "$dotest/patch-merge-index" &&
    his_tree=$(GIT_INDEX_FILE="$dotest/patch-merge-index" git-write-tree) &&
    orig_tree=$(cat "$dotest/patch-merge-base") &&
    rm -fr "$dotest"/patch-merge-* || exit 1
 
    echo Falling back to patching base and 3-way merge...
 
    # This is not so wrong.  Depending on which base we picked,
    # orig_tree may be wildly different from ours, but his_tree
    # has the same set of wildly different changes in parts the
    # patch did not touch, so resolve ends up cancelling them,
    # saying that we reverted all those changes.
 
    git-merge-resolve $orig_tree -- HEAD $his_tree || {
	    echo Failed to merge in the changes.
	    exit 1
    }
}
 
prec=4
dotest=.dotest sign= utf8= keep= skip= interactive=
 
while case "$#" in 0) break;; esac
do
	case "$1" in
	-d=*|--d=*|--do=*|--dot=*|--dote=*|--dotes=*|--dotest=*)
	dotest=`expr "$1" : '-[^=]*=\(.*\)'`; shift ;;
	-d|--d|--do|--dot|--dote|--dotes|--dotest)
	case "$#" in 1) usage ;; esac; shift
	dotest="$1"; shift;;
 
	-i|--i|--in|--int|--inte|--inter|--intera|--interac|--interact|\
	--interacti|--interactiv|--interactive)
	interactive=t; shift ;;
 
	-3|--3|--3w|--3wa|--3way)
	threeway=t; shift ;;
	-s|--s|--si|--sig|--sign|--signo|--signof|--signoff)
	sign=t; shift ;;
	-u|--u|--ut|--utf|--utf8)
	utf8=t; shift ;;
	-k|--k|--ke|--kee|--keep)
	keep=t; shift ;;
 
	--sk|--ski|--skip)
	skip=t; shift ;;
 
	--)
	shift; break ;;
	-*)
	usage ;;
	*)
	break ;;
	esac
done
 
if test -d "$dotest" &&
   last=$(cat "$dotest/last") &&
   next=$(cat "$dotest/next") &&
   test $# != 0 &&
   test "$next" -gt "$last"
then
   rm -fr "$dotest"
fi
 
if test -d "$dotest"
then
	test ",$#," = ",0," ||
	die "previous dotest directory $dotest still exists but mbox given."
	resume=yes
else
	# Make sure we are not given --skip
	test ",$skip," = ,, ||
	die "we are not resuming."
 
	# Start afresh.
	mkdir -p "$dotest" || exit
 
	# cat does the right thing for us, including '-' to mean
	# standard input.
	cat "$@" |
	git-mailsplit -d$prec "$dotest/" >"$dotest/last" || {
		rm -fr "$dotest"
		exit 1
	}
 
	echo "$sign" >"$dotest/sign"
	echo "$utf8" >"$dotest/utf8"
	echo "$keep" >"$dotest/keep"
	echo 1 >"$dotest/next"
fi
 
if test "$(cat "$dotest/utf8")" = t
then
	utf8=-u
fi
if test "$(cat "$dotest/keep")" = t
then
	keep=-k
fi
if test "$(cat "$dotest/sign")" = t
then
	SIGNOFF=`git-var GIT_COMMITTER_IDENT | sed -e '
			s/>.*/>/
			s/^/Signed-off-by: /'
		`
else
	SIGNOFF=
fi
 
last=`cat "$dotest/last"`
this=`cat "$dotest/next"`
if test "$skip" = t
then
	this=`expr "$this" + 1`
fi
 
if test "$this" -gt "$last"
then
	echo Nothing to do.
	rm -fr "$dotest"
	exit
fi
 
while test "$this" -le "$last"
do
	msgnum=`printf "%0${prec}d" $this`
	next=`expr "$this" + 1`
	test -f "$dotest/$msgnum" || {
		go_next
		continue
	}
	case "$resume" in
	'')
		git-mailinfo $keep $utf8 "$dotest/msg" "$dotest/patch" \
			<"$dotest/$msgnum" >"$dotest/info" ||
			stop_here $this
		git-stripspace < "$dotest/msg" > "$dotest/msg-clean"
		;;
	esac
	resume=
 
	GIT_AUTHOR_NAME="$(sed -n '/^Author/ s/Author: //p' "$dotest/info")"
	GIT_AUTHOR_EMAIL="$(sed -n '/^Email/ s/Email: //p' "$dotest/info")"
	GIT_AUTHOR_DATE="$(sed -n '/^Date/ s/Date: //p' "$dotest/info")"
	SUBJECT="$(sed -n '/^Subject/ s/Subject: //p' "$dotest/info")"
	export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL GIT_AUTHOR_DATE
 
	case "$keep_subject" in -k)  SUBJECT="[PATCH] $SUBJECT" ;; esac
	if test '' != "$SIGNOFF"
	then
		LAST_SIGNED_OFF_BY=`
			sed -ne '/^Signed-off-by: /p' "$dotest/msg-clean" |
			tail -n 1
		`
		ADD_SIGNOFF=$(test "$LAST_SIGNED_OFF_BY" = "$SIGNOFF" || {
		    test '' = "$LAST_SIGNED_OFF_BY" && echo
		    echo "$SIGNOFF"
		})
	else
		ADD_SIGNOFF=
	fi
	{
		echo "$SUBJECT"
		if test -s "$dotest/msg-clean"
		then
			echo
			cat "$dotest/msg-clean"
		fi
		if test '' != "$ADD_SIGNOFF"
		then
			echo "$ADD_SIGNOFF"
		fi
	} >"$dotest/final-commit"
 
	if test "$interactive" = t
	then
	    test -t 0 ||
	    die "cannot be interactive without stdin connected to a terminal."
	    action=again
	    while test "$action" = again
	    do
		echo "Commit Body is:"
		echo "--------------------------"
		cat "$dotest/final-commit"
		echo "--------------------------"
		echo -n "Apply? [y]es/[n]o/[e]dit/[a]ccept all "
		read reply
		case "$reply" in
		y*|Y*) action=yes ;;
		a*|A*) action=yes interactive= ;;
		n*|N*) action=skip ;;
		e*|E*) "${VISUAL:-${EDITOR:-vi}}" "$dotest/final-commit"
		       action=again ;;
		esac
	    done
	else
	    action=yes
	fi
 
	if test $action = skip
	then
		go_next
		continue
	fi
 
	if test -x "$GIT_DIR"/hooks/applypatch-msg
	then
		"$GIT_DIR"/hooks/applypatch-msg "$dotest/final-commit" ||
		stop_here $this
	fi
 
	echo
	echo "Applying '$SUBJECT'"
	echo
 
	git-apply --index "$dotest/patch"; apply_status=$?
	if test $apply_status = 1 && test "$threeway" = t
	then
		if (fall_back_3way)
		then
		    # Applying the patch to an earlier tree and merging the
		    # result may have produced the same tree as ours.
		    changed="$(git-diff-index --cached --name-only -z HEAD)"
		    if test '' = "$changed"
		    then
			    echo No changes -- Patch already applied.
			    go_next
			    continue
		    fi
		    # clear apply_status -- we have successfully merged.
		    apply_status=0
		fi
	fi
	if test $apply_status != 0
	then
		echo Patch failed at $msgnum.
		stop_here $this
	fi
 
	if test -x "$GIT_DIR"/hooks/pre-applypatch
	then
		"$GIT_DIR"/hooks/pre-applypatch || stop_here $this
	fi
 
	tree=$(git-write-tree) &&
	echo Wrote tree $tree &&
	parent=$(git-rev-parse --verify HEAD) &&
	commit=$(git-commit-tree $tree -p $parent <"$dotest/final-commit") &&
	echo Committed: $commit &&
	git-update-ref HEAD $commit $parent ||
	stop_here $this
 
	if test -x "$GIT_DIR"/hooks/post-applypatch
	then
		"$GIT_DIR"/hooks/post-applypatch
	fi
 
	go_next
done
 
rm -fr "$dotest"