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 $1" ;;
  90         esac
  91 }
  92
  93 # Subroutine to canonicalize remote:local notation.
  94 canon_refs_list_for_fetch () {
  95         # Leave only the first one alone; add prefix . to the rest
  96         # to prevent the secondary branches to be merged by default.
  97         dot_prefix=
  98         for ref
  99         do
 100                 force=
 101                 case "$ref" in
 102                 +*)
 103                         ref=$(expr "z$ref" : 'z+\(.*\)')
 104                         force=+
 105                         ;;
 106                 esac
 107                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 108                 remote=$(expr "z$ref" : 'z\([^:]*\):')
 109                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 110                 case "$remote" in
 111                 '') remote=HEAD ;;
 112                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 113                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 114                 *) remote="refs/heads/$remote" ;;
 115                 esac
 116                 case "$local" in
 117                 '') local= ;;
 118                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 119                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 120                 *) local="refs/heads/$local" ;;
 121                 esac
 122
 123                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 124                 then
 125                    git-check-ref-format "$local_ref_name" ||
 126                    die "* refusing to create funny ref '$local_ref_name' locally"
 127                 fi
 128                 echo "${dot_prefix}${force}${remote}:${local}"
 129                 dot_prefix=.
 130         done
 131 }
 132
 133 # Returns list of src: (no store), or src:dst (store)
 134 get_remote_default_refs_for_fetch () {
 135         data_source=$(get_data_source "$1")
 136         case "$data_source" in
 137         '' | config-partial | branches-partial)
 138                 echo "HEAD:" ;;
 139         config)
 140                 canon_refs_list_for_fetch \
 141                         $(git-repo-config --get-all "remote.$1.fetch") ;;
 142         branches)
 143                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 144                 case "$remote_branch" in '') remote_branch=master ;; esac
 145                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 146                 ;;
 147         remotes)
 148                 # This prefixes the second and later default refspecs
 149                 # with a '.', to signal git-fetch to mark them
 150                 # not-for-merge.
 151                 canon_refs_list_for_fetch $(sed -ne '/^Pull: */{
 152                                                 s///p
 153                                         }' "$GIT_DIR/remotes/$1")
 154                 ;;
 155         *)
 156                 die "internal error: get-remote-default-ref-for-push $1" ;;
 157         esac
 158 }
 159
 160 get_remote_refs_for_push () {
 161         case "$#" in
 162         0) die "internal error: get-remote-refs-for-push." ;;
 163         1) get_remote_default_refs_for_push "$@" ;;
 164         *) shift; echo "$@" ;;
 165         esac
 166 }
 167
 168 get_remote_refs_for_fetch () {
 169         case "$#" in
 170         0)
 171             die "internal error: get-remote-refs-for-fetch." ;;
 172         1)
 173             get_remote_default_refs_for_fetch "$@" ;;
 174         *)
 175             shift
 176             tag_just_seen=
 177             for ref
 178             do
 179                 if test "$tag_just_seen"
 180                 then
 181                     echo "refs/tags/${ref}:refs/tags/${ref}"
 182                     tag_just_seen=
 183                     continue
 184                 else
 185                     case "$ref" in
 186                     tag)
 187                         tag_just_seen=yes
 188                         continue
 189                         ;;
 190                     esac
 191                 fi
 192                 canon_refs_list_for_fetch "$ref"
 193             done
 194             ;;
 195         esac
 196 }
 197
 198 resolve_alternates () {
 199         # original URL (xxx.git)
 200         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 201         while read path
 202         do
 203                 case "$path" in
 204                 \#* | '')
 205                         continue ;;
 206                 /*)
 207                         echo "$top_$path/" ;;
 208                 ../*)
 209                         # relative -- ugly but seems to work.
 210                         echo "$1/objects/$path/" ;;
 211                 *)
 212                         # exit code may not be caught by the reader.
 213                         echo "bad alternate: $path"
 214                         exit 1 ;;
 215                 esac
 216         done
 217 }