forked from git/git
/
git-pull.sh
executable file
·305 lines (285 loc) · 8.29 KB
/
git-pull.sh
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
#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
# Fetch one or more remote refs and merge it/them into the current HEAD.
USAGE='[-n | --no-stat] [--[no-]commit] [--[no-]squash] [--[no-]ff] [-s strategy]... [<fetch-options>] <repo> <head>...'
LONG_USAGE='Fetch one or more remote refs and merge it/them into the current HEAD.'
SUBDIRECTORY_OK=Yes
OPTIONS_SPEC=
. git-sh-setup
set_reflog_action "pull $*"
require_work_tree
cd_to_toplevel
die_conflict () {
git diff-index --cached --name-status -r --ignore-submodules HEAD --
if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
die "Pull is not possible because you have unmerged files.
Please, fix them up in the work tree, and then use 'git add/rm <file>'
as appropriate to mark resolution, or use 'git commit -a'."
else
die "Pull is not possible because you have unmerged files."
fi
}
die_merge () {
if [ $(git config --bool --get advice.resolveConflict || echo true) = "true" ]; then
die "You have not concluded your merge (MERGE_HEAD exists).
Please, commit your changes before you can merge."
else
die "You have not concluded your merge (MERGE_HEAD exists)."
fi
}
test -z "$(git ls-files -u)" || die_conflict
test -f "$GIT_DIR/MERGE_HEAD" && die_merge
strategy_args= diffstat= no_commit= squash= no_ff= ff_only=
log_arg= verbosity= progress= recurse_submodules=
merge_args=
curr_branch=$(git symbolic-ref -q HEAD)
curr_branch_short="${curr_branch#refs/heads/}"
rebase=$(git config --bool branch.$curr_branch_short.rebase)
dry_run=
while :
do
case "$1" in
-q|--quiet)
verbosity="$verbosity -q" ;;
-v|--verbose)
verbosity="$verbosity -v" ;;
--progress)
progress=--progress ;;
--no-progress)
progress=--no-progress ;;
-n|--no-stat|--no-summary)
diffstat=--no-stat ;;
--stat|--summary)
diffstat=--stat ;;
--log|--no-log)
log_arg=$1 ;;
--no-c|--no-co|--no-com|--no-comm|--no-commi|--no-commit)
no_commit=--no-commit ;;
--c|--co|--com|--comm|--commi|--commit)
no_commit=--commit ;;
--sq|--squ|--squa|--squas|--squash)
squash=--squash ;;
--no-sq|--no-squ|--no-squa|--no-squas|--no-squash)
squash=--no-squash ;;
--ff)
no_ff=--ff ;;
--no-ff)
no_ff=--no-ff ;;
--ff-only)
ff_only=--ff-only ;;
-s=*|--s=*|--st=*|--str=*|--stra=*|--strat=*|--strate=*|\
--strateg=*|--strategy=*|\
-s|--s|--st|--str|--stra|--strat|--strate|--strateg|--strategy)
case "$#,$1" in
*,*=*)
strategy=`expr "z$1" : 'z-[^=]*=\(.*\)'` ;;
1,*)
usage ;;
*)
strategy="$2"
shift ;;
esac
strategy_args="${strategy_args}-s $strategy "
;;
-X*)
case "$#,$1" in
1,-X)
usage ;;
*,-X)
xx="-X $(git rev-parse --sq-quote "$2")"
shift ;;
*,*)
xx=$(git rev-parse --sq-quote "$1") ;;
esac
merge_args="$merge_args$xx "
;;
-r|--r|--re|--reb|--reba|--rebas|--rebase)
rebase=true
;;
--no-r|--no-re|--no-reb|--no-reba|--no-rebas|--no-rebase)
rebase=false
;;
--recurse-submodules)
recurse_submodules=--recurse-submodules
;;
--recurse-submodules=*)
recurse_submodules="$1"
;;
--no-recurse-submodules)
recurse_submodules=--no-recurse-submodules
;;
--d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run)
dry_run=--dry-run
;;
-h|--h|--he|--hel|--help|--help-|--help-a|--help-al|--help-all)
usage
;;
*)
# Pass thru anything that may be meant for fetch.
break
;;
esac
shift
done
error_on_no_merge_candidates () {
exec >&2
for opt
do
case "$opt" in
-t|--t|--ta|--tag|--tags)
echo "Fetching tags only, you probably meant:"
echo " git fetch --tags"
exit 1
esac
done
if test true = "$rebase"
then
op_type=rebase
op_prep=against
else
op_type=merge
op_prep=with
fi
curr_branch=${curr_branch#refs/heads/}
upstream=$(git config "branch.$curr_branch.merge")
remote=$(git config "branch.$curr_branch.remote")
if [ $# -gt 1 ]; then
if [ "$rebase" = true ]; then
printf "There is no candidate for rebasing against "
else
printf "There are no candidates for merging "
fi
echo "among the refs that you just fetched."
echo "Generally this means that you provided a wildcard refspec which had no"
echo "matches on the remote end."
elif [ $# -gt 0 ] && [ "$1" != "$remote" ]; then
echo "You asked to pull from the remote '$1', but did not specify"
echo "a branch. Because this is not the default configured remote"
echo "for your current branch, you must specify a branch on the command line."
elif [ -z "$curr_branch" ]; then
echo "You are not currently on a branch, so I cannot use any"
echo "'branch.<branchname>.merge' in your configuration file."
echo "Please specify which remote branch you want to use on the command"
echo "line and try again (e.g. 'git pull <repository> <refspec>')."
echo "See git-pull(1) for details."
elif [ -z "$upstream" ]; then
echo "You asked me to pull without telling me which branch you"
echo "want to $op_type $op_prep, and 'branch.${curr_branch}.merge' in"
echo "your configuration file does not tell me, either. Please"
echo "specify which branch you want to use on the command line and"
echo "try again (e.g. 'git pull <repository> <refspec>')."
echo "See git-pull(1) for details."
echo
echo "If you often $op_type $op_prep the same branch, you may want to"
echo "use something like the following in your configuration file:"
echo
echo " [branch \"${curr_branch}\"]"
echo " remote = <nickname>"
echo " merge = <remote-ref>"
test rebase = "$op_type" &&
echo " rebase = true"
echo
echo " [remote \"<nickname>\"]"
echo " url = <url>"
echo " fetch = <refspec>"
echo
echo "See git-config(1) for details."
else
echo "Your configuration specifies to $op_type $op_prep the ref '${upstream#refs/heads/}'"
echo "from the remote, but no such ref was fetched."
fi
exit 1
}
test true = "$rebase" && {
if ! git rev-parse -q --verify HEAD >/dev/null
then
# On an unborn branch
if test -f "$GIT_DIR/index"
then
die "updating an unborn branch with changes added to the index"
fi
else
require_clean_work_tree "pull with rebase" "Please commit or stash them."
fi
oldremoteref= &&
. git-parse-remote &&
remoteref="$(get_remote_merge_branch "$@" 2>/dev/null)" &&
oldremoteref="$(git rev-parse -q --verify "$remoteref")" &&
for reflog in $(git rev-list -g $remoteref 2>/dev/null)
do
if test "$reflog" = "$(git merge-base $reflog $curr_branch)"
then
oldremoteref="$reflog"
break
fi
done
}
orig_head=$(git rev-parse -q --verify HEAD)
git fetch $verbosity $progress $dry_run $recurse_submodules --update-head-ok "$@" || exit 1
test -z "$dry_run" || exit 0
curr_head=$(git rev-parse -q --verify HEAD)
if test -n "$orig_head" && test "$curr_head" != "$orig_head"
then
# The fetch involved updating the current branch.
# The working tree and the index file is still based on the
# $orig_head commit, but we are merging into $curr_head.
# First update the working tree to match $curr_head.
echo >&2 "Warning: fetch updated the current branch head."
echo >&2 "Warning: fast-forwarding your working tree from"
echo >&2 "Warning: commit $orig_head."
git update-index -q --refresh
git read-tree -u -m "$orig_head" "$curr_head" ||
die 'Cannot fast-forward your working tree.
After making sure that you saved anything precious from
$ git diff '$orig_head'
output, run
$ git reset --hard
to recover.'
fi
merge_head=$(sed -e '/ not-for-merge /d' \
-e 's/ .*//' "$GIT_DIR"/FETCH_HEAD | \
tr '\012' ' ')
case "$merge_head" in
'')
error_on_no_merge_candidates "$@"
;;
?*' '?*)
if test -z "$orig_head"
then
die "Cannot merge multiple branches into empty head"
fi
if test true = "$rebase"
then
die "Cannot rebase onto multiple branches"
fi
;;
esac
if test -z "$orig_head"
then
git update-ref -m "initial pull" HEAD $merge_head "$curr_head" &&
git read-tree -m -u HEAD || exit 1
exit
fi
if test true = "$rebase"
then
o=$(git show-branch --merge-base $curr_branch $merge_head $oldremoteref)
if test "$oldremoteref" = "$o"
then
unset oldremoteref
fi
fi
merge_name=$(git fmt-merge-msg $log_arg <"$GIT_DIR/FETCH_HEAD") || exit
case "$rebase" in
true)
eval="git-rebase $diffstat $strategy_args $merge_args"
eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
;;
*)
eval="git-merge $diffstat $no_commit $squash $no_ff $ff_only"
eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
eval="$eval \"\$merge_name\" HEAD $merge_head"
;;
esac
eval "exec $eval"