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="$LF"
13no_tags=
15tags=
16append=
17force=
18verbose=
19update_head_ok=
20exec=
21upload_pack=
22while case "$#" in 0) break ;; esac
23do
24 case "$1" in
25 -a|--a|--ap|--app|--appe|--appen|--append)
26 append=t
27 ;;
28 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
29 --upload-pa|--upload-pac|--upload-pack)
30 shift
31 exec="--exec=$1"
32 upload_pack="-u $1"
33 ;;
34 -f|--f|--fo|--for|--forc|--force)
35 force=t
36 ;;
37 -t|--t|--ta|--tag|--tags)
38 tags=t
39 ;;
40 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
41 no_tags=t
42 ;;
43 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
44 --update-he|--update-hea|--update-head|--update-head-|\
45 --update-head-o|--update-head-ok)
46 update_head_ok=t
47 ;;
48 -v|--verbose)
49 verbose=Yes
50 ;;
51 -k|--k|--ke|--kee|--keep)
52 keep=--keep
53 ;;
54 -*)
55 usage
56 ;;
57 *)
58 break
59 ;;
60 esac
61 shift
62done
63case "$#" in
650)
66 test -f "$GIT_DIR/branches/origin" ||
67 test -f "$GIT_DIR/remotes/origin" ||
68 die "Where do you want to fetch from today?"
69 set origin ;;
70esac
71remote_nick="$1"
73remote=$(get_remote_url "$@")
74refs=
75rref=
76rsync_slurped_objects=
77if test "" = "$append"
79then
80 : >"$GIT_DIR/FETCH_HEAD"
81fi
82append_fetch_head () {
84 head_="$1"
85 remote_="$2"
86 remote_name_="$3"
87 remote_nick_="$4"
88 local_name_="$5"
89 case "$6" in
90 t) not_for_merge_='not-for-merge' ;;
91 '') not_for_merge_= ;;
92 esac
93 # remote-nick is the URL given on the command line (or a shorthand)
95 # remote-name is the $GIT_DIR relative refs/ path we computed
96 # for this refspec.
97 # the $note_ variable will be fed to git-fmt-merge-msg for further
99 # processing.
100 case "$remote_name_" in
101 HEAD)
102 note_= ;;
103 refs/heads/*)
104 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
105 note_="branch '$note_' of " ;;
106 refs/tags/*)
107 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
108 note_="tag '$note_' of " ;;
109 refs/remotes/*)
110 note_="$(expr "$remote_name_" : 'refs/remotes/\(.*\)')"
111 note_="remote branch '$note_' of " ;;
112 *)
113 note_="$remote_name of " ;;
114 esac
115 remote_1_=$(expr "z$remote_" : 'z\(.*\)\.git/*$') &&
116 remote_="$remote_1_"
117 note_="$note_$remote_"
118 # 2.6.11-tree tag would not be happy to be fed to resolve.
120 if git-cat-file commit "$head_" >/dev/null 2>&1
121 then
122 headc_=$(git-rev-parse --verify "$head_^0") || exit
123 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
124 [ "$verbose" ] && echo >&2 "* committish: $head_"
125 [ "$verbose" ] && echo >&2 " $note_"
126 else
127 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
128 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
129 [ "$verbose" ] && echo >&2 " $note_"
130 fi
131 if test "$local_name_" != ""
132 then
133 # We are storing the head locally. Make sure that it is
134 # a fast forward (aka "reverse push").
135 fast_forward_local "$local_name_" "$head_" "$note_"
136 fi
137}
138fast_forward_local () {
140 mkdir -p "$(dirname "$GIT_DIR/$1")"
141 case "$1" in
142 refs/tags/*)
143 # Tags need not be pointing at commits so there
144 # is no way to guarantee "fast-forward" anyway.
145 if test -f "$GIT_DIR/$1"
146 then
147 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
148 then
149 [ "$verbose" ] && echo >&2 "* $1: same as $3"
150 else
151 echo >&2 "* $1: updating with $3"
152 fi
153 else
154 echo >&2 "* $1: storing $3"
155 fi
156 git-update-ref "$1" "$2"
157 ;;
158 refs/heads/* | refs/remotes/*)
160 # $1 is the ref being updated.
161 # $2 is the new value for the ref.
162 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
163 if test "$local"
164 then
165 # Require fast-forward.
166 mb=$(git-merge-base "$local" "$2") &&
167 case "$2,$mb" in
168 $local,*)
169 echo >&2 "* $1: same as $3"
170 ;;
171 *,$local)
172 echo >&2 "* $1: fast forward to $3"
173 echo >&2 " from $local to $2"
174 git-update-ref "$1" "$2" "$local"
175 ;;
176 *)
177 false
178 ;;
179 esac || {
180 echo >&2 "* $1: does not fast forward to $3;"
181 case ",$force,$single_force," in
182 *,t,*)
183 echo >&2 " forcing update."
184 git-update-ref "$1" "$2" "$local"
185 ;;
186 *)
187 echo >&2 " not updating."
188 exit 1
189 ;;
190 esac
191 }
192 else
193 echo >&2 "* $1: storing $3"
194 git-update-ref "$1" "$2"
195 fi
196 ;;
197 esac
198}
199case "$update_head_ok" in
201'')
202 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
203 ;;
204esac
205# If --tags (and later --heads or --all) is specified, then we are
207# not talking about defaults stored in Pull: line of remotes or
208# branches file, and just fetch those and refspecs explicitly given.
209# Otherwise we do what we always did.
210reflist=$(get_remote_refs_for_fetch "$@")
212if test "$tags"
213then
214 taglist=$(IFS=" " &&
215 git-ls-remote $upload_pack --tags "$remote" |
216 while read sha1 name
217 do
218 case "$name" in
219 (*^*) continue ;;
220 esac
221 if git-check-ref-format "$name"
222 then
223 echo ".${name}:${name}"
224 else
225 echo >&2 "warning: tag ${name} ignored"
226 fi
227 done)
228 if test "$#" -gt 1
229 then
230 # remote URL plus explicit refspecs; we need to merge them.
231 reflist="$reflist$LF$taglist"
232 else
233 # No explicit refspecs; fetch tags only.
234 reflist=$taglist
235 fi
236fi
237fetch_main () {
239 reflist="$1"
240 refs=
241 for ref in $reflist
243 do
244 refs="$refs$LF$ref"
245 # These are relative path from $GIT_DIR, typically starting at refs/
247 # but may be HEAD
248 if expr "z$ref" : 'z\.' >/dev/null
249 then
250 not_for_merge=t
251 ref=$(expr "z$ref" : 'z\.\(.*\)')
252 else
253 not_for_merge=
254 fi
255 if expr "z$ref" : 'z+' >/dev/null
256 then
257 single_force=t
258 ref=$(expr "z$ref" : 'z+\(.*\)')
259 else
260 single_force=
261 fi
262 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
263 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
264 rref="$rref$LF$remote_name"
266 # There are transports that can fetch only one head at a time...
268 case "$remote" in
269 http://* | https://*)
270 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
271 curl_extra_args="-k"
272 fi
273 max_depth=5
274 depth=0
275 head="ref: $remote_name"
276 while (expr "z$head" : "zref:" && expr $depth \< $max_depth) >/dev/null
277 do
278 remote_name_quoted=$(perl -e '
279 my $u = $ARGV[0];
280 $u =~ s/^ref:\s*//;
281 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
282 print "$u";
283 ' "$head")
284 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted")
285 depth=$( expr \( $depth + 1 \) )
286 done
287 expr "z$head" : "z$_x40\$" >/dev/null ||
288 die "Failed to fetch $remote_name from $remote"
289 echo >&2 Fetching "$remote_name from $remote" using http
290 git-http-fetch -v -a "$head" "$remote/" || exit
291 ;;
292 rsync://*)
293 TMP_HEAD="$GIT_DIR/TMP_HEAD"
294 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
295 head=$(git-rev-parse --verify TMP_HEAD)
296 rm -f "$TMP_HEAD"
297 test "$rsync_slurped_objects" || {
298 rsync -av --ignore-existing --exclude info \
299 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
300 # Look at objects/info/alternates for rsync -- http will
302 # support it natively and git native ones will do it on
303 # the remote end. Not having that file is not a crime.
304 rsync -q "$remote/objects/info/alternates" \
305 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
306 rm -f "$GIT_DIR/TMP_ALT"
307 if test -f "$GIT_DIR/TMP_ALT"
308 then
309 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
310 while read alt
311 do
312 case "$alt" in 'bad alternate: '*) die "$alt";; esac
313 echo >&2 "Getting alternate: $alt"
314 rsync -av --ignore-existing --exclude info \
315 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
316 done
317 rm -f "$GIT_DIR/TMP_ALT"
318 fi
319 rsync_slurped_objects=t
320 }
321 ;;
322 *)
323 # We will do git native transport with just one call later.
324 continue ;;
325 esac
326 append_fetch_head "$head" "$remote" \
328 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
329 done
331 case "$remote" in
333 http://* | https://* | rsync://* )
334 ;; # we are already done.
335 *)
336 ( : subshell because we muck with IFS
337 IFS=" $LF"
338 (
339 git-fetch-pack $exec $keep --thin "$remote" $rref || echo failed "$remote"
340 ) |
341 while read sha1 remote_name
342 do
343 case "$sha1" in
344 failed)
345 echo >&2 "Fetch failure: $remote"
346 exit 1 ;;
347 esac
348 found=
349 single_force=
350 for ref in $refs
351 do
352 case "$ref" in
353 +$remote_name:*)
354 single_force=t
355 not_for_merge=
356 found="$ref"
357 break ;;
358 .+$remote_name:*)
359 single_force=t
360 not_for_merge=t
361 found="$ref"
362 break ;;
363 .$remote_name:*)
364 not_for_merge=t
365 found="$ref"
366 break ;;
367 $remote_name:*)
368 not_for_merge=
369 found="$ref"
370 break ;;
371 esac
372 done
373 local_name=$(expr "z$found" : 'z[^:]*:\(.*\)')
374 append_fetch_head "$sha1" "$remote" \
375 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
376 done
377 ) || exit ;;
378 esac
379}
381fetch_main "$reflist"
383# automated tag following
385case "$no_tags$tags" in
386'')
387 case "$reflist" in
388 *:refs/*)
389 # effective only when we are following remote branch
390 # using local tracking branch.
391 taglist=$(IFS=" " &&
392 git-ls-remote $upload_pack --tags "$remote" |
393 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
394 while read sha1 name
395 do
396 test -f "$GIT_DIR/$name" && continue
397 git-check-ref-format "$name" || {
398 echo >&2 "warning: tag ${name} ignored"
399 continue
400 }
401 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
402 echo >&2 "Auto-following $name"
403 echo ".${name}:${name}"
404 done)
405 esac
406 case "$taglist" in
407 '') ;;
408 ?*)
409 fetch_main "$taglist" ;;
410 esac
411esac
412# If the original head was empty (i.e. no "master" yet), or
414# if we were told not to worry, we do not have to check.
415case ",$update_head_ok,$orig_head," in
416*,, | t,* )
417 ;;
418*)
419 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
420 if test "$curr_head" != "$orig_head"
421 then
422 git-update-ref HEAD "$orig_head"
423 die "Cannot fetch into the current branch."
424 fi
425 ;;
426esac