1#!/bin/sh
2
3# 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) || :;
6
7get_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/$1"
20 then
21 echo branches
22 else
23 echo ''
24 fi ;;
25 esac
26}
27
28get_remote_url () {
29 data_source=$(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 $1" ;;
48 esac
49}
50
51get_default_remote () {
52 curr_branch=$(git-symbolic-ref HEAD | sed -e 's|^refs/heads/||')
53 origin=$(git-repo-config --get "branch.$curr_branch.remote")
54 echo ${origin:-origin}
55}
56
57get_remote_default_refs_for_push () {
58 data_source=$(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 $1" ;;
70 esac
71}
72
73# Called from canon_refs_list_for_fetch -d "$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. $ls_remote_result has the list
78# of refs available at remote.
79expand_refs_wildcard () {
80 for ref
81 do
82 lref=${ref#'+'}
83 # a non glob pattern is given back as-is.
84 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
85 echo "$ref"
86 continue
87 }
88
89 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
90 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
91 local_force=
92 test "z$lref" = "z$ref" || local_force='+'
93 echo "$ls_remote_result" |
94 sed -e '/\^{}$/d' |
95 (
96 IFS=' '
97 while read sha1 name
98 do
99 # ignore the ones that do not start with $from
100 mapped=${name#"$from"}
101 test "z$name" = "z$mapped" && continue
102 echo "${local_force}${name}:${to}${mapped}"
103 done
104 )
105 done
106}
107
108# Subroutine to canonicalize remote:local notation.
109canon_refs_list_for_fetch () {
110 # If called from get_remote_default_refs_for_fetch
111 # leave the branches in branch.${curr_branch}.merge alone,
112 # or the first one otherwise; add prefix . to the rest
113 # to prevent the secondary branches to be merged by default.
114 merge_branches=
115 curr_branch=
116 if test "$1" = "-d"
117 then
118 shift ; remote="$1" ; shift
119 set x $(expand_refs_wildcard "$@")
120 shift
121 if test "$remote" = "$(get_default_remote)"
122 then
123 curr_branch=$(git-symbolic-ref HEAD | \
124 sed -e 's|^refs/heads/||')
125 merge_branches=$(git-repo-config \
126 --get-all "branch.${curr_branch}.merge")
127 fi
128 fi
129 for ref
130 do
131 force=
132 case "$ref" in
133 +*)
134 ref=$(expr "z$ref" : 'z+\(.*\)')
135 force=+
136 ;;
137 esac
138 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
139 remote=$(expr "z$ref" : 'z\([^:]*\):')
140 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
141 dot_prefix=.
142 if test -z "$merge_branches"
143 then
144 merge_branches=$remote
145 dot_prefix=
146 else
147 for merge_branch in $merge_branches
148 do
149 if test "$remote" = "$merge_branch" ||
150 test "$local" = "$merge_branch"
151 then
152 dot_prefix=
153 break
154 fi
155 done
156 fi
157 case "$remote" in
158 '') remote=HEAD ;;
159 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
160 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
161 *) remote="refs/heads/$remote" ;;
162 esac
163 case "$local" in
164 '') local= ;;
165 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
166 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
167 *) local="refs/heads/$local" ;;
168 esac
169
170 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
171 then
172 git-check-ref-format "$local_ref_name" ||
173 die "* refusing to create funny ref '$local_ref_name' locally"
174 fi
175 echo "${dot_prefix}${force}${remote}:${local}"
176 done
177}
178
179# Returns list of src: (no store), or src:dst (store)
180get_remote_default_refs_for_fetch () {
181 data_source=$(get_data_source "$1")
182 case "$data_source" in
183 '')
184 echo "HEAD:" ;;
185 config)
186 canon_refs_list_for_fetch -d "$1" \
187 $(git-repo-config --get-all "remote.$1.fetch") ;;
188 branches)
189 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
190 case "$remote_branch" in '') remote_branch=master ;; esac
191 echo "refs/heads/${remote_branch}:refs/heads/$1"
192 ;;
193 remotes)
194 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
195 s///p
196 }' "$GIT_DIR/remotes/$1")
197 ;;
198 *)
199 die "internal error: get-remote-default-ref-for-push $1" ;;
200 esac
201}
202
203get_remote_refs_for_push () {
204 case "$#" in
205 0) die "internal error: get-remote-refs-for-push." ;;
206 1) get_remote_default_refs_for_push "$@" ;;
207 *) shift; echo "$@" ;;
208 esac
209}
210
211get_remote_refs_for_fetch () {
212 case "$#" in
213 0)
214 die "internal error: get-remote-refs-for-fetch." ;;
215 1)
216 get_remote_default_refs_for_fetch "$@" ;;
217 *)
218 shift
219 tag_just_seen=
220 for ref
221 do
222 if test "$tag_just_seen"
223 then
224 echo "refs/tags/${ref}:refs/tags/${ref}"
225 tag_just_seen=
226 continue
227 else
228 case "$ref" in
229 tag)
230 tag_just_seen=yes
231 continue
232 ;;
233 esac
234 fi
235 canon_refs_list_for_fetch "$ref"
236 done
237 ;;
238 esac
239}
240
241resolve_alternates () {
242 # original URL (xxx.git)
243 top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
244 while read path
245 do
246 case "$path" in
247 \#* | '')
248 continue ;;
249 /*)
250 echo "$top_$path/" ;;
251 ../*)
252 # relative -- ugly but seems to work.
253 echo "$1/objects/$path/" ;;
254 *)
255 # exit code may not be caught by the reader.
256 echo "bad alternate: $path"
257 exit 1 ;;
258 esac
259 done
260}