1#!/bin/sh
2# git-ls-remote could be called from outside a git managed repository;
4# this would fail in that case and would issue an error message.
5GIT_DIR=$(git-rev-parse --git-dir 2>/dev/null) || :;
6get_data_source () {
8 case "$1" in
9 */*)
10 echo ''
11 ;;
12 *)
13 if test "$(git-repo-config --get "remote.$1.url")"
14 then
15 echo config
16 elif test -f "$GIT_DIR/remotes/$1"
17 then
18 echo remotes
19 elif test -f "$GIT_DIR/branches/$1"
20 then
21 echo branches
22 else
23 echo ''
24 fi ;;
25 esac
26}
27get_remote_url () {
29 data_source=$(get_data_source "$1")
30 case "$data_source" in
31 '')
32 echo "$1"
33 ;;
34 config)
35 git-repo-config --get "remote.$1.url"
36 ;;
37 remotes)
38 sed -ne '/^URL: */{
39 s///p
40 q
41 }' "$GIT_DIR/remotes/$1"
42 ;;
43 branches)
44 sed -e 's/#.*//' "$GIT_DIR/branches/$1"
45 ;;
46 *)
47 die "internal error: get-remote-url $1" ;;
48 esac
49}
50get_default_remote () {
52 curr_branch=$(git-symbolic-ref -q HEAD | sed -e 's|^refs/heads/||')
53 origin=$(git-repo-config --get "branch.$curr_branch.remote")
54 echo ${origin:-origin}
55}
56get_remote_default_refs_for_push () {
58 data_source=$(get_data_source "$1")
59 case "$data_source" in
60 '' | branches)
61 ;; # no default push mapping, just send matching refs.
62 config)
63 git-repo-config --get-all "remote.$1.push" ;;
64 remotes)
65 sed -ne '/^Push: */{
66 s///p
67 }' "$GIT_DIR/remotes/$1" ;;
68 *)
69 die "internal error: get-remote-default-ref-for-push $1" ;;
70 esac
71}
72# Called from canon_refs_list_for_fetch -d "$remote", which
74# is called from get_remote_default_refs_for_fetch to grok
75# refspecs that are retrieved from the configuration, but not
76# from get_remote_refs_for_fetch when it deals with refspecs
77# supplied on the command line. $ls_remote_result has the list
78# of refs available at remote.
79#
80# The first token returned is either "explicit" or "glob"; this
81# is to help prevent randomly "globbed" ref from being chosen as
82# a merge candidate
83expand_refs_wildcard () {
84 first_one=yes
85 for ref
86 do
87 lref=${ref#'+'}
88 # a non glob pattern is given back as-is.
89 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
90 if test -n "$first_one"
91 then
92 echo "explicit"
93 first_one=
94 fi
95 echo "$ref"
96 continue
97 }
98 # glob
100 if test -n "$first_one"
101 then
102 echo "glob"
103 first_one=
104 fi
105 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
106 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
107 local_force=
108 test "z$lref" = "z$ref" || local_force='+'
109 echo "$ls_remote_result" |
110 sed -e '/\^{}$/d' |
111 (
112 IFS=' '
113 while read sha1 name
114 do
115 # ignore the ones that do not start with $from
116 mapped=${name#"$from"}
117 test "z$name" = "z$mapped" && continue
118 echo "${local_force}${name}:${to}${mapped}"
119 done
120 )
121 done
122}
123# Subroutine to canonicalize remote:local notation.
125canon_refs_list_for_fetch () {
126 # If called from get_remote_default_refs_for_fetch
127 # leave the branches in branch.${curr_branch}.merge alone,
128 # or the first one otherwise; add prefix . to the rest
129 # to prevent the secondary branches to be merged by default.
130 merge_branches=
131 curr_branch=
132 if test "$1" = "-d"
133 then
134 shift ; remote="$1" ; shift
135 set $(expand_refs_wildcard "$@")
136 is_explicit="$1"
137 shift
138 if test "$remote" = "$(get_default_remote)"
139 then
140 curr_branch=$(git-symbolic-ref -q HEAD | \
141 sed -e 's|^refs/heads/||')
142 merge_branches=$(git-repo-config \
143 --get-all "branch.${curr_branch}.merge")
144 fi
145 if test -z "$merge_branches" && test $is_explicit != explicit
146 then
147 merge_branches=..this.will.never.match.any.ref..
148 fi
149 fi
150 for ref
151 do
152 force=
153 case "$ref" in
154 +*)
155 ref=$(expr "z$ref" : 'z+\(.*\)')
156 force=+
157 ;;
158 esac
159 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
160 remote=$(expr "z$ref" : 'z\([^:]*\):')
161 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
162 dot_prefix=.
163 if test -z "$merge_branches"
164 then
165 merge_branches=$remote
166 dot_prefix=
167 else
168 for merge_branch in $merge_branches
169 do
170 if test "$remote" = "$merge_branch" ||
171 test "$local" = "$merge_branch"
172 then
173 dot_prefix=
174 break
175 fi
176 done
177 fi
178 case "$remote" in
179 '') remote=HEAD ;;
180 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
181 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
182 *) remote="refs/heads/$remote" ;;
183 esac
184 case "$local" in
185 '') local= ;;
186 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
187 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
188 *) local="refs/heads/$local" ;;
189 esac
190 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
192 then
193 git-check-ref-format "$local_ref_name" ||
194 die "* refusing to create funny ref '$local_ref_name' locally"
195 fi
196 echo "${dot_prefix}${force}${remote}:${local}"
197 done
198}
199# Returns list of src: (no store), or src:dst (store)
201get_remote_default_refs_for_fetch () {
202 data_source=$(get_data_source "$1")
203 case "$data_source" in
204 '')
205 echo "HEAD:" ;;
206 config)
207 canon_refs_list_for_fetch -d "$1" \
208 $(git-repo-config --get-all "remote.$1.fetch") ;;
209 branches)
210 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
211 case "$remote_branch" in '') remote_branch=master ;; esac
212 echo "refs/heads/${remote_branch}:refs/heads/$1"
213 ;;
214 remotes)
215 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
216 s///p
217 }' "$GIT_DIR/remotes/$1")
218 ;;
219 *)
220 die "internal error: get-remote-default-ref-for-push $1" ;;
221 esac
222}
223get_remote_refs_for_push () {
225 case "$#" in
226 0) die "internal error: get-remote-refs-for-push." ;;
227 1) get_remote_default_refs_for_push "$@" ;;
228 *) shift; echo "$@" ;;
229 esac
230}
231get_remote_refs_for_fetch () {
233 case "$#" in
234 0)
235 die "internal error: get-remote-refs-for-fetch." ;;
236 1)
237 get_remote_default_refs_for_fetch "$@" ;;
238 *)
239 shift
240 tag_just_seen=
241 for ref
242 do
243 if test "$tag_just_seen"
244 then
245 echo "refs/tags/${ref}:refs/tags/${ref}"
246 tag_just_seen=
247 continue
248 else
249 case "$ref" in
250 tag)
251 tag_just_seen=yes
252 continue
253 ;;
254 esac
255 fi
256 canon_refs_list_for_fetch "$ref"
257 done
258 ;;
259 esac
260}
261resolve_alternates () {
263 # original URL (xxx.git)
264 top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
265 while read path
266 do
267 case "$path" in
268 \#* | '')
269 continue ;;
270 /*)
271 echo "$top_$path/" ;;
272 ../*)
273 # relative -- ugly but seems to work.
274 echo "$1/objects/$path/" ;;
275 *)
276 # exit code may not be caught by the reader.
277 echo "bad alternate: $path"
278 exit 1 ;;
279 esac
280 done
281}