d1659e2cfe78fef5bd8712edcedbf7296eb316be
1#!/bin/sh
2#
3USAGE='<fetch-options> <repository> <refspec>...'
5. git-sh-setup
6. git-parse-remote
7_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
8_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
9LF='
11'
12IFS="$LF"
13no_tags=
15tags=
16append=
17force=
18verbose=
19update_head_ok=
20exec=
21while case "$#" in 0) break ;; esac
22do
23 case "$1" in
24 -a|--a|--ap|--app|--appe|--appen|--append)
25 append=t
26 ;;
27 -u|--u|--up|--upl|--uploa|--upload|--upload-|--upload-p|--upload-pa|\
28 --upload-pac|--upload-pack)
29 shift
30 exec="--exec=$1"
31 ;;
32 -f|--f|--fo|--for|--forc|--force)
33 force=t
34 ;;
35 -t|--t|--ta|--tag|--tags)
36 tags=t
37 ;;
38 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
39 no_tags=t
40 ;;
41 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
42 --update-he|--update-hea|--update-head|--update-head-|\
43 --update-head-o|--update-head-ok)
44 update_head_ok=t
45 ;;
46 -v|--verbose)
47 verbose=Yes
48 ;;
49 -k|--k|--ke|--kee|--keep)
50 keep=--keep
51 ;;
52 -*)
53 usage
54 ;;
55 *)
56 break
57 ;;
58 esac
59 shift
60done
61case "$#" in
630)
64 test -f "$GIT_DIR/branches/origin" ||
65 test -f "$GIT_DIR/remotes/origin" ||
66 die "Where do you want to fetch from today?"
67 set origin ;;
68esac
69remote_nick="$1"
71remote=$(get_remote_url "$@")
72refs=
73rref=
74rsync_slurped_objects=
75if test "" = "$append"
77then
78 : >"$GIT_DIR/FETCH_HEAD"
79fi
80append_fetch_head () {
82 head_="$1"
83 remote_="$2"
84 remote_name_="$3"
85 remote_nick_="$4"
86 local_name_="$5"
87 case "$6" in
88 t) not_for_merge_='not-for-merge' ;;
89 '') not_for_merge_= ;;
90 esac
91 # remote-nick is the URL given on the command line (or a shorthand)
93 # remote-name is the $GIT_DIR relative refs/ path we computed
94 # for this refspec.
95 case "$remote_name_" in
96 HEAD)
97 note_= ;;
98 refs/heads/*)
99 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
100 note_="branch '$note_' of " ;;
101 refs/tags/*)
102 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
103 note_="tag '$note_' of " ;;
104 *)
105 note_="$remote_name of " ;;
106 esac
107 remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
108 remote_="$remote_1_"
109 note_="$note_$remote_"
110 # 2.6.11-tree tag would not be happy to be fed to resolve.
112 if git-cat-file commit "$head_" >/dev/null 2>&1
113 then
114 headc_=$(git-rev-parse --verify "$head_^0") || exit
115 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
116 [ "$verbose" ] && echo >&2 "* committish: $head_"
117 [ "$verbose" ] && echo >&2 " $note_"
118 else
119 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
120 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
121 [ "$verbose" ] && echo >&2 " $note_"
122 fi
123 if test "$local_name_" != ""
124 then
125 # We are storing the head locally. Make sure that it is
126 # a fast forward (aka "reverse push").
127 fast_forward_local "$local_name_" "$head_" "$note_"
128 fi
129}
130fast_forward_local () {
132 mkdir -p "$(dirname "$GIT_DIR/$1")"
133 case "$1" in
134 refs/tags/*)
135 # Tags need not be pointing at commits so there
136 # is no way to guarantee "fast-forward" anyway.
137 if test -f "$GIT_DIR/$1"
138 then
139 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
140 then
141 [ "$verbose" ] && echo >&2 "* $1: same as $3"
142 else
143 echo >&2 "* $1: updating with $3"
144 fi
145 else
146 echo >&2 "* $1: storing $3"
147 fi
148 git-update-ref "$1" "$2"
149 ;;
150 refs/heads/*)
152 # $1 is the ref being updated.
153 # $2 is the new value for the ref.
154 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
155 if test "$local"
156 then
157 # Require fast-forward.
158 mb=$(git-merge-base "$local" "$2") &&
159 case "$2,$mb" in
160 $local,*)
161 echo >&2 "* $1: same as $3"
162 ;;
163 *,$local)
164 echo >&2 "* $1: fast forward to $3"
165 git-update-ref "$1" "$2" "$local"
166 ;;
167 *)
168 false
169 ;;
170 esac || {
171 echo >&2 "* $1: does not fast forward to $3;"
172 case ",$force,$single_force," in
173 *,t,*)
174 echo >&2 " forcing update."
175 git-update-ref "$1" "$2" "$local"
176 ;;
177 *)
178 echo >&2 " not updating."
179 ;;
180 esac
181 }
182 else
183 echo >&2 "* $1: storing $3"
184 git-update-ref "$1" "$2"
185 fi
186 ;;
187 esac
188}
189case "$update_head_ok" in
191'')
192 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
193 ;;
194esac
195# If --tags (and later --heads or --all) is specified, then we are
197# not talking about defaults stored in Pull: line of remotes or
198# branches file, and just fetch those and refspecs explicitly given.
199# Otherwise we do what we always did.
200reflist=$(get_remote_refs_for_fetch "$@")
202if test "$tags"
203then
204 taglist=$(IFS=" " &&
205 git-ls-remote --tags "$remote" |
206 while read sha1 name
207 do
208 case "$name" in
209 (*^*) continue ;;
210 esac
211 if git-check-ref-format "$name"
212 then
213 echo ".${name}:${name}"
214 else
215 echo >&2 "warning: tag ${name} ignored"
216 fi
217 done)
218 if test "$#" -gt 1
219 then
220 # remote URL plus explicit refspecs; we need to merge them.
221 reflist="$reflist$LF$taglist"
222 else
223 # No explicit refspecs; fetch tags only.
224 reflist=$taglist
225 fi
226fi
227fetch_main () {
229 reflist="$1"
230 refs=
231 for ref in $reflist
233 do
234 refs="$refs$LF$ref"
235 # These are relative path from $GIT_DIR, typically starting at refs/
237 # but may be HEAD
238 if expr "$ref" : '\.' >/dev/null
239 then
240 not_for_merge=t
241 ref=$(expr "$ref" : '\.\(.*\)')
242 else
243 not_for_merge=
244 fi
245 if expr "$ref" : '\+' >/dev/null
246 then
247 single_force=t
248 ref=$(expr "$ref" : '\+\(.*\)')
249 else
250 single_force=
251 fi
252 remote_name=$(expr "$ref" : '\([^:]*\):')
253 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
254 rref="$rref$LF$remote_name"
256 # There are transports that can fetch only one head at a time...
258 case "$remote" in
259 http://* | https://*)
260 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
261 curl_extra_args="-k"
262 fi
263 remote_name_quoted=$(perl -e '
264 my $u = $ARGV[0];
265 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
266 print "$u";
267 ' "$remote_name")
268 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted") &&
269 expr "$head" : "$_x40\$" >/dev/null ||
270 die "Failed to fetch $remote_name from $remote"
271 echo >&2 Fetching "$remote_name from $remote" using http
272 git-http-fetch -v -a "$head" "$remote/" || exit
273 ;;
274 rsync://*)
275 TMP_HEAD="$GIT_DIR/TMP_HEAD"
276 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
277 head=$(git-rev-parse --verify TMP_HEAD)
278 rm -f "$TMP_HEAD"
279 test "$rsync_slurped_objects" || {
280 rsync -av --ignore-existing --exclude info \
281 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
282 # Look at objects/info/alternates for rsync -- http will
284 # support it natively and git native ones will do it on
285 # the remote end. Not having that file is not a crime.
286 rsync -q "$remote/objects/info/alternates" \
287 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
288 rm -f "$GIT_DIR/TMP_ALT"
289 if test -f "$GIT_DIR/TMP_ALT"
290 then
291 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
292 while read alt
293 do
294 case "$alt" in 'bad alternate: '*) die "$alt";; esac
295 echo >&2 "Getting alternate: $alt"
296 rsync -av --ignore-existing --exclude info \
297 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
298 done
299 rm -f "$GIT_DIR/TMP_ALT"
300 fi
301 rsync_slurped_objects=t
302 }
303 ;;
304 *)
305 # We will do git native transport with just one call later.
306 continue ;;
307 esac
308 append_fetch_head "$head" "$remote" \
310 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
311 done
313 case "$remote" in
315 http://* | https://* | rsync://* )
316 ;; # we are already done.
317 *)
318 ( : subshell because we muck with IFS
319 IFS=" $LF"
320 (
321 git-fetch-pack $exec $keep "$remote" $rref || echo failed "$remote"
322 ) |
323 while read sha1 remote_name
324 do
325 case "$sha1" in
326 failed)
327 echo >&2 "Fetch failure: $remote"
328 exit 1 ;;
329 esac
330 found=
331 single_force=
332 for ref in $refs
333 do
334 case "$ref" in
335 +$remote_name:*)
336 single_force=t
337 not_for_merge=
338 found="$ref"
339 break ;;
340 .+$remote_name:*)
341 single_force=t
342 not_for_merge=t
343 found="$ref"
344 break ;;
345 .$remote_name:*)
346 not_for_merge=t
347 found="$ref"
348 break ;;
349 $remote_name:*)
350 not_for_merge=
351 found="$ref"
352 break ;;
353 esac
354 done
355 local_name=$(expr "$found" : '[^:]*:\(.*\)')
356 append_fetch_head "$sha1" "$remote" \
357 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
358 done
359 ) || exit ;;
360 esac
361}
363fetch_main "$reflist"
365# automated tag following
367case "$no_tags$tags" in
368'')
369 taglist=$(IFS=" " &&
370 git-ls-remote --tags "$remote" |
371 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
372 while read sha1 name
373 do
374 test -f "$GIT_DIR/$name" && continue
375 git-check-ref-format "$name" || {
376 echo >&2 "warning: tag ${name} ignored"
377 continue
378 }
379 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
380 echo >&2 "Auto-following $name"
381 echo ".${name}:${name}"
382 done)
383 case "$taglist" in
384 '') ;;
385 ?*)
386 fetch_main "$taglist" ;;
387 esac
388esac
389# If the original head was empty (i.e. no "master" yet), or
391# if we were told not to worry, we do not have to check.
392case ",$update_head_ok,$orig_head," in
393*,, | t,* )
394 ;;
395*)
396 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
397 if test "$curr_head" != "$orig_head"
398 then
399 git-update-ref HEAD "$orig_head"
400 die "Cannot fetch into the current branch."
401 fi
402 ;;
403esac