Clarify fetch error for missing objects.
[git] / git-parse-remote.sh
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.
5 GIT_DIR=$(git-rev-parse --git-dir 2>/dev/null) || :;
6
7 get_data_source () {
8         case "$1" in
9         */*)
10                 # Not so fast.  This could be the partial URL shorthand...
11                 token=$(expr "z$1" : 'z\([^/]*\)/')
12                 remainder=$(expr "z$1" : 'z[^/]*/\(.*\)')
13                 if test "$(git-repo-config --get "remote.$token.url")"
14                 then
15                         echo config-partial
16                 elif test -f "$GIT_DIR/branches/$token"
17                 then
18                         echo branches-partial
19                 else
20                         echo ''
21                 fi
22                 ;;
23         *)
24                 if test "$(git-repo-config --get "remote.$1.url")"
25                 then
26                         echo config
27                 elif test -f "$GIT_DIR/remotes/$1"
28                 then
29                         echo remotes
30                 elif test -f "$GIT_DIR/branches/$1"
31                 then
32                         echo branches
33                 else
34                         echo ''
35                 fi ;;
36         esac
37 }
38
39 get_remote_url () {
40         data_source=$(get_data_source "$1")
41         case "$data_source" in
42         '')
43                 echo "$1" ;;
44         config-partial)
45                 token=$(expr "z$1" : 'z\([^/]*\)/')
46                 remainder=$(expr "z$1" : 'z[^/]*/\(.*\)')
47                 url=$(git-repo-config --get "remote.$token.url")
48                 echo "$url/$remainder"
49                 ;;
50         config)
51                 git-repo-config --get "remote.$1.url"
52                 ;;
53         remotes)
54                 sed -ne '/^URL: */{
55                         s///p
56                         q
57                 }' "$GIT_DIR/remotes/$1" ;;
58         branches)
59                 sed -e 's/#.*//' "$GIT_DIR/branches/$1" ;;
60         branches-partial)
61                 token=$(expr "z$1" : 'z\([^/]*\)/')
62                 remainder=$(expr "z$1" : 'z[^/]*/\(.*\)')
63                 url=$(sed -e 's/#.*//' "$GIT_DIR/branches/$token")
64                 echo "$url/$remainder"
65                 ;;
66         *)
67                 die "internal error: get-remote-url $1" ;;
68         esac
69 }
70
71 get_default_remote () {
72         curr_branch=$(git-symbolic-ref HEAD | sed -e 's|^refs/heads/||')
73         origin=$(git-repo-config --get "branch.$curr_branch.remote")
74         echo ${origin:-origin}
75 }
76
77 get_remote_default_refs_for_push () {
78         data_source=$(get_data_source "$1")
79         case "$data_source" in
80         '' | config-partial | branches | branches-partial)
81                 ;; # no default push mapping, just send matching refs.
82         config)
83                 git-repo-config --get-all "remote.$1.push" ;;
84         remotes)
85                 sed -ne '/^Push: */{
86                         s///p
87                 }' "$GIT_DIR/remotes/$1" ;;
88         *)
89                 die "internal error: get-remote-default-ref-for-push $1" ;;
90         esac
91 }
92
93 # Subroutine to canonicalize remote:local notation.
94 canon_refs_list_for_fetch () {
95         # If called from get_remote_default_refs_for_fetch
96         # leave the branches in branch.${curr_branch}.merge alone,
97         # or the first one otherwise; add prefix . to the rest
98         # to prevent the secondary branches to be merged by default.
99         merge_branches=
100         if test "$1" = "-d"
101         then
102                 shift ; remote="$1" ; shift
103                 if test "$remote" = "$(get_default_remote)"
104                 then
105                         curr_branch=$(git-symbolic-ref HEAD | \
106                             sed -e 's|^refs/heads/||')
107                         merge_branches=$(git-repo-config \
108                             --get-all "branch.${curr_branch}.merge")
109                 fi
110         fi
111         for ref
112         do
113                 force=
114                 case "$ref" in
115                 +*)
116                         ref=$(expr "z$ref" : 'z+\(.*\)')
117                         force=+
118                         ;;
119                 esac
120                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
121                 remote=$(expr "z$ref" : 'z\([^:]*\):')
122                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
123                 dot_prefix=.
124                 if test -z "$merge_branches"
125                 then
126                         merge_branches=$remote
127                         dot_prefix=
128                 else
129                         for merge_branch in $merge_branches
130                         do
131                             [ "$remote" = "$merge_branch" ] &&
132                             dot_prefix= && break
133                         done
134                 fi
135                 case "$remote" in
136                 '') remote=HEAD ;;
137                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
138                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
139                 *) remote="refs/heads/$remote" ;;
140                 esac
141                 case "$local" in
142                 '') local= ;;
143                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
144                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
145                 *) local="refs/heads/$local" ;;
146                 esac
147
148                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
149                 then
150                    git-check-ref-format "$local_ref_name" ||
151                    die "* refusing to create funny ref '$local_ref_name' locally"
152                 fi
153                 echo "${dot_prefix}${force}${remote}:${local}"
154         done
155 }
156
157 # Returns list of src: (no store), or src:dst (store)
158 get_remote_default_refs_for_fetch () {
159         data_source=$(get_data_source "$1")
160         case "$data_source" in
161         '' | config-partial | branches-partial)
162                 echo "HEAD:" ;;
163         config)
164                 canon_refs_list_for_fetch -d "$1" \
165                         $(git-repo-config --get-all "remote.$1.fetch") ;;
166         branches)
167                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
168                 case "$remote_branch" in '') remote_branch=master ;; esac
169                 echo "refs/heads/${remote_branch}:refs/heads/$1"
170                 ;;
171         remotes)
172                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
173                                                 s///p
174                                         }' "$GIT_DIR/remotes/$1")
175                 ;;
176         *)
177                 die "internal error: get-remote-default-ref-for-push $1" ;;
178         esac
179 }
180
181 get_remote_refs_for_push () {
182         case "$#" in
183         0) die "internal error: get-remote-refs-for-push." ;;
184         1) get_remote_default_refs_for_push "$@" ;;
185         *) shift; echo "$@" ;;
186         esac
187 }
188
189 get_remote_refs_for_fetch () {
190         case "$#" in
191         0)
192             die "internal error: get-remote-refs-for-fetch." ;;
193         1)
194             get_remote_default_refs_for_fetch "$@" ;;
195         *)
196             shift
197             tag_just_seen=
198             for ref
199             do
200                 if test "$tag_just_seen"
201                 then
202                     echo "refs/tags/${ref}:refs/tags/${ref}"
203                     tag_just_seen=
204                     continue
205                 else
206                     case "$ref" in
207                     tag)
208                         tag_just_seen=yes
209                         continue
210                         ;;
211                     esac
212                 fi
213                 canon_refs_list_for_fetch "$ref"
214             done
215             ;;
216         esac
217 }
218
219 resolve_alternates () {
220         # original URL (xxx.git)
221         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
222         while read path
223         do
224                 case "$path" in
225                 \#* | '')
226                         continue ;;
227                 /*)
228                         echo "$top_$path/" ;;
229                 ../*)
230                         # relative -- ugly but seems to work.
231                         echo "$1/objects/$path/" ;;
232                 *)
233                         # exit code may not be caught by the reader.
234                         echo "bad alternate: $path"
235                         exit 1 ;;
236                 esac
237         done
238 }