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 echo >&2 " from $local to $2"
168 git-update-ref "$1" "$2" "$local"
169 ;;
170 *)
171 false
172 ;;
173 esac || {
174 echo >&2 "* $1: does not fast forward to $3;"
175 case ",$force,$single_force," in
176 *,t,*)
177 echo >&2 " forcing update."
178 git-update-ref "$1" "$2" "$local"
179 ;;
180 *)
181 echo >&2 " not updating."
182 exit 1
183 ;;
184 esac
185 }
186 else
187 echo >&2 "* $1: storing $3"
188 git-update-ref "$1" "$2"
189 fi
190 ;;
191 esac
192}
193case "$update_head_ok" in
195'')
196 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
197 ;;
198esac
199# If --tags (and later --heads or --all) is specified, then we are
201# not talking about defaults stored in Pull: line of remotes or
202# branches file, and just fetch those and refspecs explicitly given.
203# Otherwise we do what we always did.
204reflist=$(get_remote_refs_for_fetch "$@")
206if test "$tags"
207then
208 taglist=$(IFS=" " &&
209 git-ls-remote $upload_pack --tags "$remote" |
210 while read sha1 name
211 do
212 case "$name" in
213 (*^*) continue ;;
214 esac
215 if git-check-ref-format "$name"
216 then
217 echo ".${name}:${name}"
218 else
219 echo >&2 "warning: tag ${name} ignored"
220 fi
221 done)
222 if test "$#" -gt 1
223 then
224 # remote URL plus explicit refspecs; we need to merge them.
225 reflist="$reflist$LF$taglist"
226 else
227 # No explicit refspecs; fetch tags only.
228 reflist=$taglist
229 fi
230fi
231fetch_main () {
233 reflist="$1"
234 refs=
235 for ref in $reflist
237 do
238 refs="$refs$LF$ref"
239 # These are relative path from $GIT_DIR, typically starting at refs/
241 # but may be HEAD
242 if expr "$ref" : '\.' >/dev/null
243 then
244 not_for_merge=t
245 ref=$(expr "$ref" : '\.\(.*\)')
246 else
247 not_for_merge=
248 fi
249 if expr "$ref" : '\+' >/dev/null
250 then
251 single_force=t
252 ref=$(expr "$ref" : '\+\(.*\)')
253 else
254 single_force=
255 fi
256 remote_name=$(expr "$ref" : '\([^:]*\):')
257 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
258 rref="$rref$LF$remote_name"
260 # There are transports that can fetch only one head at a time...
262 case "$remote" in
263 http://* | https://*)
264 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
265 curl_extra_args="-k"
266 fi
267 remote_name_quoted=$(perl -e '
268 my $u = $ARGV[0];
269 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
270 print "$u";
271 ' "$remote_name")
272 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted") &&
273 expr "$head" : "$_x40\$" >/dev/null ||
274 die "Failed to fetch $remote_name from $remote"
275 echo >&2 Fetching "$remote_name from $remote" using http
276 git-http-fetch -v -a "$head" "$remote/" || exit
277 ;;
278 rsync://*)
279 TMP_HEAD="$GIT_DIR/TMP_HEAD"
280 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
281 head=$(git-rev-parse --verify TMP_HEAD)
282 rm -f "$TMP_HEAD"
283 test "$rsync_slurped_objects" || {
284 rsync -av --ignore-existing --exclude info \
285 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
286 # Look at objects/info/alternates for rsync -- http will
288 # support it natively and git native ones will do it on
289 # the remote end. Not having that file is not a crime.
290 rsync -q "$remote/objects/info/alternates" \
291 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
292 rm -f "$GIT_DIR/TMP_ALT"
293 if test -f "$GIT_DIR/TMP_ALT"
294 then
295 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
296 while read alt
297 do
298 case "$alt" in 'bad alternate: '*) die "$alt";; esac
299 echo >&2 "Getting alternate: $alt"
300 rsync -av --ignore-existing --exclude info \
301 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
302 done
303 rm -f "$GIT_DIR/TMP_ALT"
304 fi
305 rsync_slurped_objects=t
306 }
307 ;;
308 *)
309 # We will do git native transport with just one call later.
310 continue ;;
311 esac
312 append_fetch_head "$head" "$remote" \
314 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
315 done
317 case "$remote" in
319 http://* | https://* | rsync://* )
320 ;; # we are already done.
321 *)
322 ( : subshell because we muck with IFS
323 IFS=" $LF"
324 (
325 git-fetch-pack $exec $keep --thin "$remote" $rref || echo failed "$remote"
326 ) |
327 while read sha1 remote_name
328 do
329 case "$sha1" in
330 failed)
331 echo >&2 "Fetch failure: $remote"
332 exit 1 ;;
333 esac
334 found=
335 single_force=
336 for ref in $refs
337 do
338 case "$ref" in
339 +$remote_name:*)
340 single_force=t
341 not_for_merge=
342 found="$ref"
343 break ;;
344 .+$remote_name:*)
345 single_force=t
346 not_for_merge=t
347 found="$ref"
348 break ;;
349 .$remote_name:*)
350 not_for_merge=t
351 found="$ref"
352 break ;;
353 $remote_name:*)
354 not_for_merge=
355 found="$ref"
356 break ;;
357 esac
358 done
359 local_name=$(expr "$found" : '[^:]*:\(.*\)')
360 append_fetch_head "$sha1" "$remote" \
361 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
362 done
363 ) || exit ;;
364 esac
365}
367fetch_main "$reflist"
369# automated tag following
371case "$no_tags$tags" in
372'')
373 case "$reflist" in
374 *:refs/*)
375 # effective only when we are following remote branch
376 # using local tracking branch.
377 taglist=$(IFS=" " &&
378 git-ls-remote $upload_pack --tags "$remote" |
379 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
380 while read sha1 name
381 do
382 test -f "$GIT_DIR/$name" && continue
383 git-check-ref-format "$name" || {
384 echo >&2 "warning: tag ${name} ignored"
385 continue
386 }
387 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
388 echo >&2 "Auto-following $name"
389 echo ".${name}:${name}"
390 done)
391 esac
392 case "$taglist" in
393 '') ;;
394 ?*)
395 fetch_main "$taglist" ;;
396 esac
397esac
398# If the original head was empty (i.e. no "master" yet), or
400# if we were told not to worry, we do not have to check.
401case ",$update_head_ok,$orig_head," in
402*,, | t,* )
403 ;;
404*)
405 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
406 if test "$curr_head" != "$orig_head"
407 then
408 git-update-ref HEAD "$orig_head"
409 die "Cannot fetch into the current branch."
410 fi
411 ;;
412esac