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 $1" ;;
  90         esac
  91 }
  92
  93 # Called from canon_refs_list_for_fetch -d "$remote", which
  94 # is called from get_remote_default_refs_for_fetch to grok
  95 # refspecs that are retrieved from the configuration, but not
  96 # from get_remote_refs_for_fetch when it deals with refspecs
  97 # supplied on the command line.  $ls_remote_result has the list
  98 # of refs available at remote.
  99 expand_refs_wildcard () {
 100         for ref
 101         do
 102                 # a non glob pattern is given back as-is.
 103                 expr "z$ref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
 104                         echo "$ref"
 105                         continue
 106                 }
 107                 from=`expr "z$ref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
 108                 to=`expr "z$ref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
 109                 echo "$ls_remote_result" |
 110                 (
 111                         IFS='   '
 112                         while read sha1 name
 113                         do
 114                                 mapped=${name#"$from"}
 115                                 if test "z$name" != "z${name#'^{}'}" ||
 116                                         test "z$name" = "z$mapped"
 117                                 then
 118                                         continue
 119                                 fi
 120                                 echo "${name}:${to}${mapped}"
 121                         done
 122                 )
 123         done
 124 }
 125
 126 # Subroutine to canonicalize remote:local notation.
 127 canon_refs_list_for_fetch () {
 128         # If called from get_remote_default_refs_for_fetch
 129         # leave the branches in branch.${curr_branch}.merge alone,
 130         # or the first one otherwise; add prefix . to the rest
 131         # to prevent the secondary branches to be merged by default.
 132         merge_branches=
 133         if test "$1" = "-d"
 134         then
 135                 shift ; remote="$1" ; shift
 136                 if test "$remote" = "$(get_default_remote)"
 137                 then
 138                         curr_branch=$(git-symbolic-ref HEAD | \
 139                             sed -e 's|^refs/heads/||')
 140                         merge_branches=$(git-repo-config \
 141                             --get-all "branch.${curr_branch}.merge")
 142                 fi
 143                 set x $(expand_refs_wildcard "$@")
 144                 shift
 145         fi
 146         for ref
 147         do
 148                 force=
 149                 case "$ref" in
 150                 +*)
 151                         ref=$(expr "z$ref" : 'z+\(.*\)')
 152                         force=+
 153                         ;;
 154                 esac
 155                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 156                 remote=$(expr "z$ref" : 'z\([^:]*\):')
 157                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 158                 dot_prefix=.
 159                 if test -z "$merge_branches"
 160                 then
 161                         merge_branches=$remote
 162                         dot_prefix=
 163                 else
 164                         for merge_branch in $merge_branches
 165                         do
 166                             [ "$remote" = "$merge_branch" ] &&
 167                             dot_prefix= && break
 168                         done
 169                 fi
 170                 case "$remote" in
 171                 '') remote=HEAD ;;
 172                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 173                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 174                 *) remote="refs/heads/$remote" ;;
 175                 esac
 176                 case "$local" in
 177                 '') local= ;;
 178                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 179                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 180                 *) local="refs/heads/$local" ;;
 181                 esac
 182
 183                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 184                 then
 185                    git-check-ref-format "$local_ref_name" ||
 186                    die "* refusing to create funny ref '$local_ref_name' locally"
 187                 fi
 188                 echo "${dot_prefix}${force}${remote}:${local}"
 189         done
 190 }
 191
 192 # Returns list of src: (no store), or src:dst (store)
 193 get_remote_default_refs_for_fetch () {
 194         data_source=$(get_data_source "$1")
 195         case "$data_source" in
 196         '' | config-partial | branches-partial)
 197                 echo "HEAD:" ;;
 198         config)
 199                 canon_refs_list_for_fetch -d "$1" \
 200                         $(git-repo-config --get-all "remote.$1.fetch") ;;
 201         branches)
 202                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 203                 case "$remote_branch" in '') remote_branch=master ;; esac
 204                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 205                 ;;
 206         remotes)
 207                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 208                                                 s///p
 209                                         }' "$GIT_DIR/remotes/$1")
 210                 ;;
 211         *)
 212                 die "internal error: get-remote-default-ref-for-push $1" ;;
 213         esac
 214 }
 215
 216 get_remote_refs_for_push () {
 217         case "$#" in
 218         0) die "internal error: get-remote-refs-for-push." ;;
 219         1) get_remote_default_refs_for_push "$@" ;;
 220         *) shift; echo "$@" ;;
 221         esac
 222 }
 223
 224 get_remote_refs_for_fetch () {
 225         case "$#" in
 226         0)
 227             die "internal error: get-remote-refs-for-fetch." ;;
 228         1)
 229             get_remote_default_refs_for_fetch "$@" ;;
 230         *)
 231             shift
 232             tag_just_seen=
 233             for ref
 234             do
 235                 if test "$tag_just_seen"
 236                 then
 237                     echo "refs/tags/${ref}:refs/tags/${ref}"
 238                     tag_just_seen=
 239                     continue
 240                 else
 241                     case "$ref" in
 242                     tag)
 243                         tag_just_seen=yes
 244                         continue
 245                         ;;
 246                     esac
 247                 fi
 248                 canon_refs_list_for_fetch "$ref"
 249             done
 250             ;;
 251         esac
 252 }
 253
 254 resolve_alternates () {
 255         # original URL (xxx.git)
 256         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 257         while read path
 258         do
 259                 case "$path" in
 260                 \#* | '')
 261                         continue ;;
 262                 /*)
 263                         echo "$top_$path/" ;;
 264                 ../*)
 265                         # relative -- ugly but seems to work.
 266                         echo "$1/objects/$path/" ;;
 267                 *)
 268                         # exit code may not be caught by the reader.
 269                         echo "bad alternate: $path"
 270                         exit 1 ;;
 271                 esac
 272         done
 273 }