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="$LF"
13no_tags=
15tags=
16append=
17force=
18verbose=
19update_head_ok=
20while case "$#" in 0) break ;; esac
21do
22 case "$1" in
23 -a|--a|--ap|--app|--appe|--appen|--append)
24 append=t
25 ;;
26 -f|--f|--fo|--for|--forc|--force)
27 force=t
28 ;;
29 -t|--t|--ta|--tag|--tags)
30 tags=t
31 ;;
32 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
33 no_tags=t
34 ;;
35 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
36 --update-he|--update-hea|--update-head|--update-head-|\
37 --update-head-o|--update-head-ok)
38 update_head_ok=t
39 ;;
40 -v|--verbose)
41 verbose=Yes
42 ;;
43 -k|--k|--ke|--kee|--keep)
44 keep=--keep
45 ;;
46 -*)
47 usage
48 ;;
49 *)
50 break
51 ;;
52 esac
53 shift
54done
55case "$#" in
570)
58 test -f "$GIT_DIR/branches/origin" ||
59 test -f "$GIT_DIR/remotes/origin" ||
60 die "Where do you want to fetch from today?"
61 set origin ;;
62esac
63remote_nick="$1"
65remote=$(get_remote_url "$@")
66refs=
67rref=
68rsync_slurped_objects=
69if test "" = "$append"
71then
72 : >"$GIT_DIR/FETCH_HEAD"
73fi
74append_fetch_head () {
76 head_="$1"
77 remote_="$2"
78 remote_name_="$3"
79 remote_nick_="$4"
80 local_name_="$5"
81 case "$6" in
82 t) not_for_merge_='not-for-merge' ;;
83 '') not_for_merge_= ;;
84 esac
85 # remote-nick is the URL given on the command line (or a shorthand)
87 # remote-name is the $GIT_DIR relative refs/ path we computed
88 # for this refspec.
89 case "$remote_name_" in
90 HEAD)
91 note_= ;;
92 refs/heads/*)
93 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
94 note_="branch '$note_' of " ;;
95 refs/tags/*)
96 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
97 note_="tag '$note_' of " ;;
98 *)
99 note_="$remote_name of " ;;
100 esac
101 remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
102 remote_="$remote_1_"
103 note_="$note_$remote_"
104 # 2.6.11-tree tag would not be happy to be fed to resolve.
106 if git-cat-file commit "$head_" >/dev/null 2>&1
107 then
108 headc_=$(git-rev-parse --verify "$head_^0") || exit
109 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
110 [ "$verbose" ] && echo >&2 "* committish: $head_"
111 [ "$verbose" ] && echo >&2 " $note_"
112 else
113 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
114 [ "$verbose" ] && echo >&2 "* non-commit: $head_"
115 [ "$verbose" ] && echo >&2 " $note_"
116 fi
117 if test "$local_name_" != ""
118 then
119 # We are storing the head locally. Make sure that it is
120 # a fast forward (aka "reverse push").
121 fast_forward_local "$local_name_" "$head_" "$note_"
122 fi
123}
124fast_forward_local () {
126 mkdir -p "$(dirname "$GIT_DIR/$1")"
127 case "$1" in
128 refs/tags/*)
129 # Tags need not be pointing at commits so there
130 # is no way to guarantee "fast-forward" anyway.
131 if test -f "$GIT_DIR/$1"
132 then
133 if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
134 then
135 [ "$verbose" ] && echo >&2 "* $1: same as $3"
136 else
137 echo >&2 "* $1: updating with $3"
138 fi
139 else
140 echo >&2 "* $1: storing $3"
141 fi
142 git-update-ref "$1" "$2"
143 ;;
144 refs/heads/*)
146 # $1 is the ref being updated.
147 # $2 is the new value for the ref.
148 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
149 if test "$local"
150 then
151 # Require fast-forward.
152 mb=$(git-merge-base "$local" "$2") &&
153 case "$2,$mb" in
154 $local,*)
155 echo >&2 "* $1: same as $3"
156 ;;
157 *,$local)
158 echo >&2 "* $1: fast forward to $3"
159 git-update-ref "$1" "$2" "$local"
160 ;;
161 *)
162 false
163 ;;
164 esac || {
165 echo >&2 "* $1: does not fast forward to $3;"
166 case ",$force,$single_force," in
167 *,t,*)
168 echo >&2 " forcing update."
169 git-update-ref "$1" "$2" "$local"
170 ;;
171 *)
172 echo >&2 " not updating."
173 ;;
174 esac
175 }
176 else
177 echo >&2 "* $1: storing $3"
178 git-update-ref "$1" "$2"
179 fi
180 ;;
181 esac
182}
183case "$update_head_ok" in
185'')
186 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
187 ;;
188esac
189# If --tags (and later --heads or --all) is specified, then we are
191# not talking about defaults stored in Pull: line of remotes or
192# branches file, and just fetch those and refspecs explicitly given.
193# Otherwise we do what we always did.
194reflist=$(get_remote_refs_for_fetch "$@")
196if test "$tags"
197then
198 taglist=$(IFS=" " &&
199 git-ls-remote --tags "$remote" |
200 while read sha1 name
201 do
202 case "$name" in
203 (*^*) continue ;;
204 esac
205 if git-check-ref-format "$name"
206 then
207 echo ".${name}:${name}"
208 else
209 echo >&2 "warning: tag ${name} ignored"
210 fi
211 done)
212 if test "$#" -gt 1
213 then
214 # remote URL plus explicit refspecs; we need to merge them.
215 reflist="$reflist$LF$taglist"
216 else
217 # No explicit refspecs; fetch tags only.
218 reflist=$taglist
219 fi
220fi
221fetch_main () {
223 reflist="$1"
224 refs=
225 for ref in $reflist
227 do
228 refs="$refs$LF$ref"
229 # These are relative path from $GIT_DIR, typically starting at refs/
231 # but may be HEAD
232 if expr "$ref" : '\.' >/dev/null
233 then
234 not_for_merge=t
235 ref=$(expr "$ref" : '\.\(.*\)')
236 else
237 not_for_merge=
238 fi
239 if expr "$ref" : '\+' >/dev/null
240 then
241 single_force=t
242 ref=$(expr "$ref" : '\+\(.*\)')
243 else
244 single_force=
245 fi
246 remote_name=$(expr "$ref" : '\([^:]*\):')
247 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
248 rref="$rref$LF$remote_name"
250 # There are transports that can fetch only one head at a time...
252 case "$remote" in
253 http://* | https://*)
254 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
255 curl_extra_args="-k"
256 fi
257 remote_name_quoted=$(perl -e '
258 my $u = $ARGV[0];
259 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
260 print "$u";
261 ' "$remote_name")
262 head=$(curl -nsfL $curl_extra_args "$remote/$remote_name_quoted") &&
263 expr "$head" : "$_x40\$" >/dev/null ||
264 die "Failed to fetch $remote_name from $remote"
265 echo >&2 Fetching "$remote_name from $remote" using http
266 git-http-fetch -v -a "$head" "$remote/" || exit
267 ;;
268 rsync://*)
269 TMP_HEAD="$GIT_DIR/TMP_HEAD"
270 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
271 head=$(git-rev-parse --verify TMP_HEAD)
272 rm -f "$TMP_HEAD"
273 test "$rsync_slurped_objects" || {
274 rsync -av --ignore-existing --exclude info \
275 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
276 # Look at objects/info/alternates for rsync -- http will
278 # support it natively and git native ones will do it on
279 # the remote end. Not having that file is not a crime.
280 rsync -q "$remote/objects/info/alternates" \
281 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
282 rm -f "$GIT_DIR/TMP_ALT"
283 if test -f "$GIT_DIR/TMP_ALT"
284 then
285 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
286 while read alt
287 do
288 case "$alt" in 'bad alternate: '*) die "$alt";; esac
289 echo >&2 "Getting alternate: $alt"
290 rsync -av --ignore-existing --exclude info \
291 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
292 done
293 rm -f "$GIT_DIR/TMP_ALT"
294 fi
295 rsync_slurped_objects=t
296 }
297 ;;
298 *)
299 # We will do git native transport with just one call later.
300 continue ;;
301 esac
302 append_fetch_head "$head" "$remote" \
304 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
305 done
307 case "$remote" in
309 http://* | https://* | rsync://* )
310 ;; # we are already done.
311 *)
312 ( : subshell because we muck with IFS
313 IFS=" $LF"
314 (
315 git-fetch-pack $keep "$remote" $rref || echo failed "$remote"
316 ) |
317 while read sha1 remote_name
318 do
319 case "$sha1" in
320 failed)
321 echo >&2 "Fetch failure: $remote"
322 exit 1 ;;
323 esac
324 found=
325 single_force=
326 for ref in $refs
327 do
328 case "$ref" in
329 +$remote_name:*)
330 single_force=t
331 not_for_merge=
332 found="$ref"
333 break ;;
334 .+$remote_name:*)
335 single_force=t
336 not_for_merge=t
337 found="$ref"
338 break ;;
339 .$remote_name:*)
340 not_for_merge=t
341 found="$ref"
342 break ;;
343 $remote_name:*)
344 not_for_merge=
345 found="$ref"
346 break ;;
347 esac
348 done
349 local_name=$(expr "$found" : '[^:]*:\(.*\)')
350 append_fetch_head "$sha1" "$remote" \
351 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
352 done
353 ) || exit ;;
354 esac
355}
357fetch_main "$reflist"
359# automated tag following
361case "$no_tags$tags" in
362'')
363 taglist=$(IFS=" " &&
364 git-ls-remote --tags "$remote" |
365 sed -ne 's|^\([0-9a-f]*\)[ ]\(refs/tags/.*\)^{}$|\1 \2|p' |
366 while read sha1 name
367 do
368 test -f "$GIT_DIR/$name" && continue
369 git-check-ref-format "$name" || {
370 echo >&2 "warning: tag ${name} ignored"
371 continue
372 }
373 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
374 echo >&2 "Auto-following $name"
375 echo ".${name}:${name}"
376 done)
377 case "$taglist" in
378 '') ;;
379 ?*)
380 fetch_main "$taglist" ;;
381 esac
382esac
383# If the original head was empty (i.e. no "master" yet), or
385# if we were told not to worry, we do not have to check.
386case ",$update_head_ok,$orig_head," in
387*,, | t,* )
388 ;;
389*)
390 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
391 if test "$curr_head" != "$orig_head"
392 then
393 git-update-ref HEAD "$orig_head"
394 die "Cannot fetch into the current branch."
395 fi
396 ;;
397esac