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 $GIT_DIR relative refs/ path we computed
96 # for this refspec.
97 case "$remote_name_" in
98 HEAD)
99 note_= ;;
100 refs/heads/*)
101 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
102 note_="branch '$note_' of " ;;
103 refs/tags/*)
104 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
105 note_="tag '$note_' of " ;;
106 *)
107 note_="$remote_name of " ;;
108 esac
109 remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
110 remote_="$remote_1_"
111 note_="$note_$remote_"
112 # 2.6.11-tree tag would not be happy to be fed to resolve.
114 if git-cat-file commit "$head_" >/dev/null 2>&1
115 then
116 headc_=$(git-rev-parse --verify "$head_^0") || exit
117 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
118 [ "$verbose" ] && echo >&2 "* committish: $head_"
119 [ "$verbose" ] && echo >&2 " $note_"
120 else
121 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
122 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
123 [ "$verbose" ] && echo >&2 " $note_"
124 fi
125 if test "$local_name_" != ""
126 then
127 # We are storing the head locally. Make sure that it is
128 # a fast forward (aka "reverse push").
129 fast_forward_local "$local_name_" "$head_" "$note_"
130 fi
131}
132fast_forward_local () {
134 mkdir -p "$(dirname "$GIT_DIR/$1")"
135 case "$1" in
136 refs/tags/*)
137 # Tags need not be pointing at commits so there
138 # is no way to guarantee "fast-forward" anyway.
139 if test -f "$GIT_DIR/$1"
140 then
141 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
142 then
143 [ "$verbose" ] && echo >&2 "* $1: same as $3"
144 else
145 echo >&2 "* $1: updating with $3"
146 fi
147 else
148 echo >&2 "* $1: storing $3"
149 fi
150 git-update-ref "$1" "$2"
151 ;;
152 refs/heads/*)
154 # $1 is the ref being updated.
155 # $2 is the new value for the ref.
156 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
157 if test "$local"
158 then
159 # Require fast-forward.
160 mb=$(git-merge-base "$local" "$2") &&
161 case "$2,$mb" in
162 $local,*)
163 echo >&2 "* $1: same as $3"
164 ;;
165 *,$local)
166 echo >&2 "* $1: fast forward to $3"
167 git-update-ref "$1" "$2" "$local"
168 ;;
169 *)
170 false
171 ;;
172 esac || {
173 echo >&2 "* $1: does not fast forward to $3;"
174 case ",$force,$single_force," in
175 *,t,*)
176 echo >&2 " forcing update."
177 git-update-ref "$1" "$2" "$local"
178 ;;
179 *)
180 echo >&2 " not updating."
181 ;;
182 esac
183 }
184 else
185 echo >&2 "* $1: storing $3"
186 git-update-ref "$1" "$2"
187 fi
188 ;;
189 esac
190}
191case "$update_head_ok" in
193'')
194 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
195 ;;
196esac
197# If --tags (and later --heads or --all) is specified, then we are
199# not talking about defaults stored in Pull: line of remotes or
200# branches file, and just fetch those and refspecs explicitly given.
201# Otherwise we do what we always did.
202reflist=$(get_remote_refs_for_fetch "$@")
204if test "$tags"
205then
206 taglist=$(IFS=" " &&
207 git-ls-remote $upload_pack --tags "$remote" |
208 while read sha1 name
209 do
210 case "$name" in
211 (*^*) continue ;;
212 esac
213 if git-check-ref-format "$name"
214 then
215 echo ".${name}:${name}"
216 else
217 echo >&2 "warning: tag ${name} ignored"
218 fi
219 done)
220 if test "$#" -gt 1
221 then
222 # remote URL plus explicit refspecs; we need to merge them.
223 reflist="$reflist$LF$taglist"
224 else
225 # No explicit refspecs; fetch tags only.
226 reflist=$taglist
227 fi
228fi
229fetch_main () {
231 reflist="$1"
232 refs=
233 for ref in $reflist
235 do
236 refs="$refs$LF$ref"
237 # These are relative path from $GIT_DIR, typically starting at refs/
239 # but may be HEAD
240 if expr "$ref" : '\.' >/dev/null
241 then
242 not_for_merge=t
243 ref=$(expr "$ref" : '\.\(.*\)')
244 else
245 not_for_merge=
246 fi
247 if expr "$ref" : '\+' >/dev/null
248 then
249 single_force=t
250 ref=$(expr "$ref" : '\+\(.*\)')
251 else
252 single_force=
253 fi
254 remote_name=$(expr "$ref" : '\([^:]*\):')
255 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
256 rref="$rref$LF$remote_name"
258 # There are transports that can fetch only one head at a time...
260 case "$remote" in
261 http://* | https://*)
262 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
263 curl_extra_args="-k"
264 fi
265 remote_name_quoted=$(perl -e '
266 my $u = $ARGV[0];
267 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
268 print "$u";
269 ' "$remote_name")
270 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted") &&
271 expr "$head" : "$_x40\$" >/dev/null ||
272 die "Failed to fetch $remote_name from $remote"
273 echo >&2 Fetching "$remote_name from $remote" using http
274 git-http-fetch -v -a "$head" "$remote/" || exit
275 ;;
276 rsync://*)
277 TMP_HEAD="$GIT_DIR/TMP_HEAD"
278 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
279 head=$(git-rev-parse --verify TMP_HEAD)
280 rm -f "$TMP_HEAD"
281 test "$rsync_slurped_objects" || {
282 rsync -av --ignore-existing --exclude info \
283 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
284 # Look at objects/info/alternates for rsync -- http will
286 # support it natively and git native ones will do it on
287 # the remote end. Not having that file is not a crime.
288 rsync -q "$remote/objects/info/alternates" \
289 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
290 rm -f "$GIT_DIR/TMP_ALT"
291 if test -f "$GIT_DIR/TMP_ALT"
292 then
293 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
294 while read alt
295 do
296 case "$alt" in 'bad alternate: '*) die "$alt";; esac
297 echo >&2 "Getting alternate: $alt"
298 rsync -av --ignore-existing --exclude info \
299 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
300 done
301 rm -f "$GIT_DIR/TMP_ALT"
302 fi
303 rsync_slurped_objects=t
304 }
305 ;;
306 *)
307 # We will do git native transport with just one call later.
308 continue ;;
309 esac
310 append_fetch_head "$head" "$remote" \
312 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
313 done
315 case "$remote" in
317 http://* | https://* | rsync://* )
318 ;; # we are already done.
319 *)
320 ( : subshell because we muck with IFS
321 IFS=" $LF"
322 (
323 git-fetch-pack $exec $keep "$remote" $rref || echo failed "$remote"
324 ) |
325 while read sha1 remote_name
326 do
327 case "$sha1" in
328 failed)
329 echo >&2 "Fetch failure: $remote"
330 exit 1 ;;
331 esac
332 found=
333 single_force=
334 for ref in $refs
335 do
336 case "$ref" in
337 +$remote_name:*)
338 single_force=t
339 not_for_merge=
340 found="$ref"
341 break ;;
342 .+$remote_name:*)
343 single_force=t
344 not_for_merge=t
345 found="$ref"
346 break ;;
347 .$remote_name:*)
348 not_for_merge=t
349 found="$ref"
350 break ;;
351 $remote_name:*)
352 not_for_merge=
353 found="$ref"
354 break ;;
355 esac
356 done
357 local_name=$(expr "$found" : '[^:]*:\(.*\)')
358 append_fetch_head "$sha1" "$remote" \
359 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
360 done
361 ) || exit ;;
362 esac
363}
365fetch_main "$reflist"
367# automated tag following
369case "$no_tags$tags" in
370'')
371 case "$reflist" in
372 *:refs/*)
373 # effective only when we are following remote branch
374 # using local tracking branch.
375 taglist=$(IFS=" " &&
376 git-ls-remote $upload_pack --tags "$remote" |
377 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
378 while read sha1 name
379 do
380 test -f "$GIT_DIR/$name" && continue
381 git-check-ref-format "$name" || {
382 echo >&2 "warning: tag ${name} ignored"
383 continue
384 }
385 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
386 echo >&2 "Auto-following $name"
387 echo ".${name}:${name}"
388 done)
389 esac
390 case "$taglist" in
391 '') ;;
392 ?*)
393 fetch_main "$taglist" ;;
394 esac
395esac
396# If the original head was empty (i.e. no "master" yet), or
398# if we were told not to worry, we do not have to check.
399case ",$update_head_ok,$orig_head," in
400*,, | t,* )
401 ;;
402*)
403 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
404 if test "$curr_head" != "$orig_head"
405 then
406 git-update-ref HEAD "$orig_head"
407 die "Cannot fetch into the current branch."
408 fi
409 ;;
410esac