1#!/bin/sh
2#
3. git-sh-setup || die "Not a git archive"
4. git-parse-remote
5_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
6_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
7LF='
9'
10IFS="$LF"
11tags=
13append=
14force=
15update_head_ok=
16while case "$#" in 0) break ;; esac
17do
18 case "$1" in
19 -a|--a|--ap|--app|--appe|--appen|--append)
20 append=t
21 ;;
22 -f|--f|--fo|--for|--forc|--force)
23 force=t
24 ;;
25 -t|--t|--ta|--tag|--tags)
26 tags=t
27 ;;
28 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
29 --update-he|--update-hea|--update-head|--update-head-|\
30 --update-head-o|--update-head-ok)
31 update_head_ok=t
32 ;;
33 *)
34 break
35 ;;
36 esac
37 shift
38done
39case "$#" in
410)
42 test -f "$GIT_DIR/branches/origin" ||
43 test -f "$GIT_DIR/remotes/origin" ||
44 die "Where do you want to fetch from today?"
45 set origin ;;
46esac
47remote_nick="$1"
49remote=$(get_remote_url "$@")
50refs=
51rref=
52rsync_slurped_objects=
53if test "" = "$append"
55then
56 : >"$GIT_DIR/FETCH_HEAD"
57fi
58append_fetch_head () {
60 head_="$1"
61 remote_="$2"
62 remote_name_="$3"
63 remote_nick_="$4"
64 local_name_="$5"
65 case "$6" in
66 t) not_for_merge_='not-for-merge' ;;
67 '') not_for_merge_= ;;
68 esac
69 # remote-nick is the URL given on the command line (or a shorthand)
71 # remote-name is the $GIT_DIR relative refs/ path we computed
72 # for this refspec.
73 case "$remote_name_" in
74 HEAD)
75 note_= ;;
76 refs/heads/*)
77 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
78 note_="branch '$note_' of " ;;
79 refs/tags/*)
80 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
81 note_="tag '$note_' of " ;;
82 *)
83 note_="$remote_name of " ;;
84 esac
85 remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
86 remote_="$remote_1_"
87 note_="$note_$remote_"
88 # 2.6.11-tree tag would not be happy to be fed to resolve.
90 if git-cat-file commit "$head_" >/dev/null 2>&1
91 then
92 headc_=$(git-rev-parse --verify "$head_^0") || exit
93 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
94 echo >&2 "* committish: $head_"
95 echo >&2 " $note_"
96 else
97 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
98 echo >&2 "* non-commit: $head_"
99 echo >&2 " $note_"
100 fi
101 if test "$local_name_" != ""
102 then
103 # We are storing the head locally. Make sure that it is
104 # a fast forward (aka "reverse push").
105 fast_forward_local "$local_name_" "$head_" "$note_"
106 fi
107}
108fast_forward_local () {
110 mkdir -p "$(dirname "$GIT_DIR/$1")"
111 case "$1" in
112 refs/tags/*)
113 # Tags need not be pointing at commits so there
114 # is no way to guarantee "fast-forward" anyway.
115 if test -f "$GIT_DIR/$1"
116 then
117 echo >&2 "* $1: updating with $3"
118 else
119 echo >&2 "* $1: storing $3"
120 fi
121 git-update-ref "$1" "$2"
122 ;;
123 refs/heads/*)
125 # $1 is the ref being updated.
126 # $2 is the new value for the ref.
127 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
128 if test "$local"
129 then
130 # Require fast-forward.
131 mb=$(git-merge-base "$local" "$2") &&
132 case "$2,$mb" in
133 $local,*)
134 echo >&2 "* $1: same as $3"
135 ;;
136 *,$local)
137 echo >&2 "* $1: fast forward to $3"
138 git-update-ref "$1" "$2" "$local"
139 ;;
140 *)
141 false
142 ;;
143 esac || {
144 echo >&2 "* $1: does not fast forward to $3;"
145 case ",$force,$single_force," in
146 *,t,*)
147 echo >&2 " forcing update."
148 git-update-ref "$1" "$2" "$local"
149 ;;
150 *)
151 echo >&2 " not updating."
152 ;;
153 esac
154 }
155 else
156 echo >&2 "* $1: storing $3"
157 git-update-ref "$1" "$2"
158 fi
159 ;;
160 esac
161}
162case "$update_head_ok" in
164'')
165 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
166 ;;
167esac
168# If --tags (and later --heads or --all) is specified, then we are
170# not talking about defaults stored in Pull: line of remotes or
171# branches file, and just fetch those and refspecs explicitly given.
172# Otherwise we do what we always did.
173reflist=$(get_remote_refs_for_fetch "$@")
175if test "$tags"
176then
177 taglist=$(git-ls-remote --tags "$remote" |
178 sed -e '
179 s/^[^ ]* //
180 s/.*/&:&/')
181 if test "$#" -gt 1
182 then
183 # remote URL plus explicit refspecs; we need to merge them.
184 reflist="$reflist$LF$taglist"
185 else
186 # No explicit refspecs; fetch tags only.
187 reflist=$taglist
188 fi
189fi
190for ref in $reflist
192do
193 refs="$refs$LF$ref"
194 # These are relative path from $GIT_DIR, typically starting at refs/
196 # but may be HEAD
197 if expr "$ref" : '\.' >/dev/null
198 then
199 not_for_merge=t
200 ref=$(expr "$ref" : '\.\(.*\)')
201 else
202 not_for_merge=
203 fi
204 if expr "$ref" : '\+' >/dev/null
205 then
206 single_force=t
207 ref=$(expr "$ref" : '\+\(.*\)')
208 else
209 single_force=
210 fi
211 remote_name=$(expr "$ref" : '\([^:]*\):')
212 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
213 rref="$rref$LF$remote_name"
215 # There are transports that can fetch only one head at a time...
217 case "$remote" in
218 http://* | https://*)
219 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
220 curl_extra_args="-k"
221 fi
222 remote_name_quoted=$(perl -e '
223 my $u = $ARGV[0];
224 $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
225 print "$u";
226 ' "$remote_name")
227 head=$(curl -nsf $curl_extra_args "$remote/$remote_name_quoted") &&
228 expr "$head" : "$_x40\$" >/dev/null ||
229 die "Failed to fetch $remote_name from $remote"
230 echo >&2 Fetching "$remote_name from $remote" using http
231 git-http-fetch -v -a "$head" "$remote/" || exit
232 ;;
233 rsync://*)
234 TMP_HEAD="$GIT_DIR/TMP_HEAD"
235 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
236 head=$(git-rev-parse --verify TMP_HEAD)
237 rm -f "$TMP_HEAD"
238 test "$rsync_slurped_objects" || {
239 rsync -av --ignore-existing --exclude info \
240 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
241 # Look at objects/info/alternates for rsync -- http will
243 # support it natively and git native ones will do it on the remote
244 # end. Not having that file is not a crime.
245 rsync -q "$remote/objects/info/alternates" \
246 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
247 rm -f "$GIT_DIR/TMP_ALT"
248 if test -f "$GIT_DIR/TMP_ALT"
249 then
250 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
251 while read alt
252 do
253 case "$alt" in 'bad alternate: '*) die "$alt";; esac
254 echo >&2 "Getting alternate: $alt"
255 rsync -av --ignore-existing --exclude info \
256 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
257 done
258 rm -f "$GIT_DIR/TMP_ALT"
259 fi
260 rsync_slurped_objects=t
261 }
262 ;;
263 *)
264 # We will do git native transport with just one call later.
265 continue ;;
266 esac
267 append_fetch_head "$head" "$remote" \
269 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
270done
272case "$remote" in
274http://* | https://* | rsync://* )
275 ;; # we are already done.
276*)
277 IFS=" $LF"
278 (
279 git-fetch-pack "$remote" $rref || echo failed "$remote"
280 ) |
281 while read sha1 remote_name
282 do
283 case "$sha1" in
284 failed)
285 echo >&2 "Fetch failure: $remote"
286 exit 1 ;;
287 esac
288 found=
289 single_force=
290 for ref in $refs
291 do
292 case "$ref" in
293 +$remote_name:*)
294 single_force=t
295 not_for_merge=
296 found="$ref"
297 break ;;
298 .+$remote_name:*)
299 single_force=t
300 not_for_merge=t
301 found="$ref"
302 break ;;
303 .$remote_name:*)
304 not_for_merge=t
305 found="$ref"
306 break ;;
307 $remote_name:*)
308 not_for_merge=
309 found="$ref"
310 break ;;
311 esac
312 done
313 local_name=$(expr "$found" : '[^:]*:\(.*\)')
314 append_fetch_head "$sha1" "$remote" \
315 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
316 done || exit
317 ;;
318esac
319# If the original head was empty (i.e. no "master" yet), or
321# if we were told not to worry, we do not have to check.
322case ",$update_head_ok,$orig_head," in
323*,, | t,* )
324 ;;
325*)
326 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
327 if test "$curr_head" != "$orig_head"
328 then
329 git-update-ref HEAD "$orig_head"
330 die "Cannot fetch into the current branch."
331 fi
332 ;;
333esac