Merge branch 'maint-1.5.1' into maint
[git/spearce.git] / git-fetch.sh
blob0e05cf1195737d2c7afc4b9447d7b4105908bf77
1 #!/bin/sh
4 USAGE='<fetch-options> <repository> <refspec>...'
5 SUBDIRECTORY_OK=Yes
6 . git-sh-setup
7 set_reflog_action "fetch $*"
8 cd_to_toplevel ;# probably unnecessary...
10 . git-parse-remote
11 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
12 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
14 LF='
16 IFS="$LF"
18 no_tags=
19 tags=
20 append=
21 force=
22 verbose=
23 update_head_ok=
24 exec=
25 keep=
26 shallow_depth=
27 no_progress=
28 test -t 1 || no_progress=--no-progress
29 quiet=
30 while case "$#" in 0) break ;; esac
32 case "$1" in
33 -a|--a|--ap|--app|--appe|--appen|--append)
34 append=t
36 --upl|--uplo|--uploa|--upload|--upload-|--upload-p|\
37 --upload-pa|--upload-pac|--upload-pack)
38 shift
39 exec="--upload-pack=$1"
41 --upl=*|--uplo=*|--uploa=*|--upload=*|\
42 --upload-=*|--upload-p=*|--upload-pa=*|--upload-pac=*|--upload-pack=*)
43 exec=--upload-pack=$(expr "z$1" : 'z-[^=]*=\(.*\)')
44 shift
46 -f|--f|--fo|--for|--forc|--force)
47 force=t
49 -t|--t|--ta|--tag|--tags)
50 tags=t
52 -n|--n|--no|--no-|--no-t|--no-ta|--no-tag|--no-tags)
53 no_tags=t
55 -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
56 --update-he|--update-hea|--update-head|--update-head-|\
57 --update-head-o|--update-head-ok)
58 update_head_ok=t
60 -q|--q|--qu|--qui|--quie|--quiet)
61 quiet=--quiet
63 -v|--verbose)
64 verbose=Yes
66 -k|--k|--ke|--kee|--keep)
67 keep='-k -k'
69 --depth=*)
70 shallow_depth="--depth=`expr "z$1" : 'z-[^=]*=\(.*\)'`"
72 --depth)
73 shift
74 shallow_depth="--depth=$1"
76 -*)
77 usage
80 break
82 esac
83 shift
84 done
86 case "$#" in
88 origin=$(get_default_remote)
89 test -n "$(get_remote_url ${origin})" ||
90 die "Where do you want to fetch from today?"
91 set x $origin ; shift ;;
92 esac
94 if test -z "$exec"
95 then
96 # No command line override and we have configuration for the remote.
97 exec="--upload-pack=$(get_uploadpack $1)"
100 remote_nick="$1"
101 remote=$(get_remote_url "$@")
102 refs=
103 rref=
104 rsync_slurped_objects=
106 if test "" = "$append"
107 then
108 : >"$GIT_DIR/FETCH_HEAD"
111 # Global that is reused later
112 ls_remote_result=$(git ls-remote $exec "$remote") ||
113 die "Cannot get the repository state from $remote"
115 append_fetch_head () {
116 flags=
117 test -n "$verbose" && flags="$flags$LF-v"
118 test -n "$force$single_force" && flags="$flags$LF-f"
119 GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
120 git-fetch--tool $flags append-fetch-head "$@"
123 # updating the current HEAD with git-fetch in a bare
124 # repository is always fine.
125 if test -z "$update_head_ok" && test $(is_bare_repository) = false
126 then
127 orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
130 # Allow --notags from remote.$1.tagopt
131 case "$tags$no_tags" in
133 case "$(git-config --get "remote.$1.tagopt")" in
134 --no-tags)
135 no_tags=t ;;
136 esac
137 esac
139 # If --tags (and later --heads or --all) is specified, then we are
140 # not talking about defaults stored in Pull: line of remotes or
141 # branches file, and just fetch those and refspecs explicitly given.
142 # Otherwise we do what we always did.
144 reflist=$(get_remote_refs_for_fetch "$@")
145 if test "$tags"
146 then
147 taglist=`IFS=' ' &&
148 echo "$ls_remote_result" |
149 git-show-ref --exclude-existing=refs/tags/ |
150 while read sha1 name
152 echo ".${name}:${name}"
153 done` || exit
154 if test "$#" -gt 1
155 then
156 # remote URL plus explicit refspecs; we need to merge them.
157 reflist="$reflist$LF$taglist"
158 else
159 # No explicit refspecs; fetch tags only.
160 reflist=$taglist
164 fetch_all_at_once () {
166 eval=$(echo "$1" | git-fetch--tool parse-reflist "-")
167 eval "$eval"
169 ( : subshell because we muck with IFS
170 IFS=" $LF"
172 if test "$remote" = . ; then
173 git-show-ref $rref || echo failed "$remote"
174 elif test -f "$remote" ; then
175 test -n "$shallow_depth" &&
176 die "shallow clone with bundle is not supported"
177 git-bundle unbundle "$remote" $rref ||
178 echo failed "$remote"
179 else
180 if test -d "$remote" &&
182 # The remote might be our alternate. With
183 # this optimization we will bypass fetch-pack
184 # altogether, which means we cannot be doing
185 # the shallow stuff at all.
186 test ! -f "$GIT_DIR/shallow" &&
187 test -z "$shallow_depth" &&
189 # See if all of what we are going to fetch are
190 # connected to our repository's tips, in which
191 # case we do not have to do any fetch.
192 theirs=$(echo "$ls_remote_result" | \
193 git-fetch--tool -s pick-rref "$rref" "-") &&
195 # This will barf when $theirs reach an object that
196 # we do not have in our repository. Otherwise,
197 # we already have everything the fetch would bring in.
198 git-rev-list --objects $theirs --not --all \
199 >/dev/null 2>/dev/null
200 then
201 echo "$ls_remote_result" | \
202 git-fetch--tool pick-rref "$rref" "-"
203 else
204 git-fetch-pack --thin $exec $keep $shallow_depth \
205 $quiet $no_progress "$remote" $rref ||
206 echo failed "$remote"
211 flags=
212 test -n "$verbose" && flags="$flags -v"
213 test -n "$force" && flags="$flags -f"
214 GIT_REFLOG_ACTION="$GIT_REFLOG_ACTION" \
215 git-fetch--tool $flags native-store \
216 "$remote" "$remote_nick" "$refs"
218 ) || exit
222 fetch_per_ref () {
223 reflist="$1"
224 refs=
225 rref=
227 for ref in $reflist
229 refs="$refs$LF$ref"
231 # These are relative path from $GIT_DIR, typically starting at refs/
232 # but may be HEAD
233 if expr "z$ref" : 'z\.' >/dev/null
234 then
235 not_for_merge=t
236 ref=$(expr "z$ref" : 'z\.\(.*\)')
237 else
238 not_for_merge=
240 if expr "z$ref" : 'z+' >/dev/null
241 then
242 single_force=t
243 ref=$(expr "z$ref" : 'z+\(.*\)')
244 else
245 single_force=
247 remote_name=$(expr "z$ref" : 'z\([^:]*\):')
248 local_name=$(expr "z$ref" : 'z[^:]*:\(.*\)')
250 rref="$rref$LF$remote_name"
252 # There are transports that can fetch only one head at a time...
253 case "$remote" in
254 http://* | https://* | ftp://*)
255 test -n "$shallow_depth" &&
256 die "shallow clone with http not supported"
257 proto=`expr "$remote" : '\([^:]*\):'`
258 if [ -n "$GIT_SSL_NO_VERIFY" ]; then
259 curl_extra_args="-k"
261 if [ -n "$GIT_CURL_FTP_NO_EPSV" -o \
262 "`git-config --bool http.noEPSV`" = true ]; then
263 noepsv_opt="--disable-epsv"
266 # Find $remote_name from ls-remote output.
267 head=$(echo "$ls_remote_result" | \
268 git-fetch--tool -s pick-rref "$remote_name" "-")
269 expr "z$head" : "z$_x40\$" >/dev/null ||
270 die "No such ref $remote_name at $remote"
271 echo >&2 "Fetching $remote_name from $remote using $proto"
272 case "$quiet" in '') v=-v ;; *) v= ;; esac
273 git-http-fetch $v -a "$head" "$remote" || exit
275 rsync://*)
276 test -n "$shallow_depth" &&
277 die "shallow clone with rsync not supported"
278 TMP_HEAD="$GIT_DIR/TMP_HEAD"
279 rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
280 head=$(git-rev-parse --verify TMP_HEAD)
281 rm -f "$TMP_HEAD"
282 case "$quiet" in '') v=-v ;; *) v= ;; esac
283 test "$rsync_slurped_objects" || {
284 rsync -a $v --ignore-existing --exclude info \
285 "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
287 # Look at objects/info/alternates for rsync -- http will
288 # support it natively and git native ones will do it on
289 # the remote end. Not having that file is not a crime.
290 rsync -q "$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" <"$GIT_DIR/TMP_ALT" |
296 while read alt
298 case "$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"
305 rsync_slurped_objects=t
308 esac
310 append_fetch_head "$head" "$remote" \
311 "$remote_name" "$remote_nick" "$local_name" "$not_for_merge" || exit
313 done
317 fetch_main () {
318 case "$remote" in
319 http://* | https://* | ftp://* | rsync://* )
320 fetch_per_ref "$@"
323 fetch_all_at_once "$@"
325 esac
328 fetch_main "$reflist" || exit
330 # automated tag following
331 case "$no_tags$tags" in
333 case "$reflist" in
334 *:refs/*)
335 # effective only when we are following remote branch
336 # using local tracking branch.
337 taglist=$(IFS=' ' &&
338 echo "$ls_remote_result" |
339 git-show-ref --exclude-existing=refs/tags/ |
340 while read sha1 name
342 git-cat-file -t "$sha1" >/dev/null 2>&1 || continue
343 echo >&2 "Auto-following $name"
344 echo ".${name}:${name}"
345 done)
346 esac
347 case "$taglist" in
348 '') ;;
350 # do not deepen a shallow tree when following tags
351 shallow_depth=
352 fetch_main "$taglist" || exit ;;
353 esac
354 esac
356 # If the original head was empty (i.e. no "master" yet), or
357 # if we were told not to worry, we do not have to check.
358 case "$orig_head" in
362 curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
363 if test "$curr_head" != "$orig_head"
364 then
365 git-update-ref \
366 -m "$GIT_REFLOG_ACTION: Undoing incorrectly fetched HEAD." \
367 HEAD "$orig_head"
368 die "Cannot fetch into the current branch."
371 esac