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"
7tags=
9append=
10force=
11update_head_ok=
12while case "$#" in 0) break ;; esac
13do
14 case "$1" in
15 -a|--a|--ap|--app|--appe|--appen|--append)
16 append=t
17 ;;
18 -f|--f|--fo|--for|--forc|--force)
19 force=t
20 ;;
21 -t|--t|--ta|--tag|--tags)
22 tags=t
23 ;;
24 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
25 --update-he|--update-hea|--update-head|--update-head-|\
26 --update-head-o|--update-head-ok)
27 update_head_ok=t
28 ;;
29 *)
30 break
31 ;;
32 esac
33 shift
34done
35case "$#" in
370)
38 test -f "$GIT_DIR/branches/origin" ||
39 test -f "$GIT_DIR/remotes/origin" ||
40 die "Where do you want to fetch from today?"
41 set origin ;;
42esac
43remote_nick="$1"
45remote=$(get_remote_url "$@")
46refs=
47rref=
48rsync_slurped_objects=
49if test "" = "$append"
51then
52 : >"$GIT_DIR/FETCH_HEAD"
53fi
54append_fetch_head () {
56 head_="$1"
57 remote_="$2"
58 remote_name_="$3"
59 remote_nick_="$4"
60 local_name_="$5"
61 case "$6" in
62 t) not_for_merge_='not-for-merge' ;;
63 '') not_for_merge_= ;;
64 esac
65 # remote-nick is the URL given on the command line (or a shorthand)
67 # remote-name is the $GIT_DIR relative refs/ path we computed
68 # for this refspec.
69 case "$remote_name_" in
70 HEAD)
71 note_= ;;
72 refs/heads/*)
73 note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
74 note_="branch '$note_' of " ;;
75 refs/tags/*)
76 note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
77 note_="tag '$note_' of " ;;
78 *)
79 note_="$remote_name of " ;;
80 esac
81 remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
82 remote_="$remote_1_"
83 note_="$note_$remote_"
84 # 2.6.11-tree tag would not be happy to be fed to resolve.
86 if git-cat-file commit "$head_" >/dev/null 2>&1
87 then
88 headc_=$(git-rev-parse --verify "$head_^0") || exit
89 echo "$headc_ $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
90 echo >&2 "* committish: $head_"
91 echo >&2 " $note_"
92 else
93 echo "$head_ not-for-merge $note_" >>"$GIT_DIR/FETCH_HEAD"
94 echo >&2 "* non-commit: $head_"
95 echo >&2 " $note_"
96 fi
97 if test "$local_name_" != ""
98 then
99 # We are storing the head locally. Make sure that it is
100 # a fast forward (aka "reverse push").
101 fast_forward_local "$local_name_" "$head_" "$note_"
102 fi
103}
104fast_forward_local () {
106 mkdir -p "$(dirname "$GIT_DIR/$1")"
107 case "$1" in
108 refs/tags/*)
109 # Tags need not be pointing at commits so there
110 # is no way to guarantee "fast-forward" anyway.
111 if test -f "$GIT_DIR/$1"
112 then
113 echo >&2 "* $1: updating with $3"
114 else
115 echo >&2 "* $1: storing $3"
116 fi
117 git-update-ref "$1" "$2"
118 ;;
119 refs/heads/*)
121 # $1 is the ref being updated.
122 # $2 is the new value for the ref.
123 local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
124 if test "$local"
125 then
126 # Require fast-forward.
127 mb=$(git-merge-base "$local" "$2") &&
128 case "$2,$mb" in
129 $local,*)
130 echo >&2 "* $1: same as $3"
131 ;;
132 *,$local)
133 echo >&2 "* $1: fast forward to $3"
134 git-update-ref "$1" "$2" "$local"
135 ;;
136 *)
137 false
138 ;;
139 esac || {
140 echo >&2 "* $1: does not fast forward to $3;"
141 case ",$force,$single_force," in
142 *,t,*)
143 echo >&2 " forcing update."
144 git-update-ref "$1" "$2" "$local"
145 ;;
146 *)
147 echo >&2 " not updating."
148 ;;
149 esac
150 }
151 else
152 echo >&2 "* $1: storing $3"
153 git-update-ref "$1" "$2"
154 fi
155 ;;
156 esac
157}
158case "$update_head_ok" in
160'')
161 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
162 ;;
163esac
164# If --tags (and later --heads or --all) is specified, then we are
166# not talking about defaults stored in Pull: line of remotes or
167# branches file, and just fetch those and refspecs explicitly given.
168# Otherwise we do what we always did.
169reflist=$(get_remote_refs_for_fetch "$@")
171if test "$tags"
172then
173 taglist=$(git-ls-remote --tags "$remote" |
174 sed -e '
175 /\^{}$/d
176 s/^[^ ]* //
177 s/.*/&:&/')
178 if test "$#" -gt 1
179 then
180 # remote URL plus explicit refspecs; we need to merge them.
181 reflist="$reflist $taglist"
182 else
183 # No explicit refspecs; fetch tags only.
184 reflist=$taglist
185 fi
186fi
187for ref in $reflist
189do
190 refs="$refs $ref"
191 # These are relative path from $GIT_DIR, typically starting at refs/
193 # but may be HEAD
194 if expr "$ref" : '\.' >/dev/null
195 then
196 not_for_merge=t
197 ref=$(expr "$ref" : '\.\(.*\)')
198 else
199 not_for_merge=
200 fi
201 if expr "$ref" : '\+' >/dev/null
202 then
203 single_force=t
204 ref=$(expr "$ref" : '\+\(.*\)')
205 else
206 single_force=
207 fi
208 remote_name=$(expr "$ref" : '\([^:]*\):')
209 local_name=$(expr "$ref" : '[^:]*:\(.*\)')
210 rref="$rref $remote_name"
212 # There are transports that can fetch only one head at a time...
214 case "$remote" in
215 http://* | https://*)
216 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
217 curl_extra_args="-k"
218 fi
219 head=$(curl -nsf $curl_extra_args "$remote/$remote_name") &&
220 expr "$head" : "$_x40\$" >/dev/null ||
221 die "Failed to fetch $remote_name from $remote"
222 echo >&2 Fetching "$remote_name from $remote" using http
223 git-http-fetch -v -a "$head" "$remote/" || exit
224 ;;
225 rsync://*)
226 TMP_HEAD="$GIT_DIR/TMP_HEAD"
227 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
228 head=$(git-rev-parse --verify TMP_HEAD)
229 rm -f "$TMP_HEAD"
230 test "$rsync_slurped_objects" || {
231 rsync -av --ignore-existing --exclude info \
232 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
233 # Look at objects/info/alternates for rsync -- http will
235 # support it natively and git native ones will do it on the remote
236 # end. Not having that file is not a crime.
237 rsync -q "$remote/objects/info/alternates" \
238 "$GIT_DIR/TMP_ALT" 2>/dev/null ||
239 rm -f "$GIT_DIR/TMP_ALT"
240 if test -f "$GIT_DIR/TMP_ALT"
241 then
242 resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
243 while read alt
244 do
245 case "$alt" in 'bad alternate: '*) die "$alt";; esac
246 echo >&2 "Getting alternate: $alt"
247 rsync -av --ignore-existing --exclude info \
248 "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
249 done
250 rm -f "$GIT_DIR/TMP_ALT"
251 fi
252 rsync_slurped_objects=t
253 }
254 ;;
255 *)
256 # We will do git native transport with just one call later.
257 continue ;;
258 esac
259 append_fetch_head "$head" "$remote" \
261 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
262done
264case "$remote" in
266http://* | https://* | rsync://* )
267 ;; # we are already done.
268*)
269 (
270 git-fetch-pack "$remote" $rref || echo failed "$remote"
271 ) |
272 while read sha1 remote_name
273 do
274 case "$sha1" in
275 failed)
276 echo >&2 "Fetch failure: $remote"
277 exit 1 ;;
278 esac
279 found=
280 single_force=
281 for ref in $refs
282 do
283 case "$ref" in
284 +$remote_name:*)
285 single_force=t
286 not_for_merge=
287 found="$ref"
288 break ;;
289 .+$remote_name:*)
290 single_force=t
291 not_for_merge=t
292 found="$ref"
293 break ;;
294 .$remote_name:*)
295 not_for_merge=t
296 found="$ref"
297 break ;;
298 $remote_name:*)
299 not_for_merge=
300 found="$ref"
301 break ;;
302 esac
303 done
304 local_name=$(expr "$found" : '[^:]*:\(.*\)')
305 append_fetch_head "$sha1" "$remote" \
306 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
307 done || exit
308 ;;
309esac
310# If the original head was empty (i.e. no "master" yet), or
312# if we were told not to worry, we do not have to check.
313case ",$update_head_ok,$orig_head," in
314*,, | t,* )
315 ;;
316*)
317 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
318 if test "$curr_head" != "$orig_head"
319 then
320 git-update-ref HEAD "$orig_head"
321 die "Cannot fetch into the current branch."
322 fi
323 ;;
324esac