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.  $ls_remote_result has the list
  98 # of refs available at remote.
  99 expand_refs_wildcard () {
 100         for ref
 101         do
 102                 lref=${ref#'+'}
 103                 # a non glob pattern is given back as-is.
 104                 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
 105                         echo "$ref"
 106                         continue
 107                 }
 108
 109                 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
 110                 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
 111                 local_force=
 112                 test "z$lref" = "z$ref" || local_force='+'
 113                 echo "$ls_remote_result" |
 114                 sed -e '/\^{}$/d' |
 115                 (
 116                         IFS='   '
 117                         while read sha1 name
 118                         do
 119                                 # ignore the ones that do not start with $from
 120                                 mapped=${name#"$from"}
 121                                 test "z$name" = "z$mapped" && continue
 122                                 echo "${local_force}${name}:${to}${mapped}"
 123                         done
 124                 )
 125         done
 126 }
 127
 128 # Subroutine to canonicalize remote:local notation.
 129 canon_refs_list_for_fetch () {
 130         # If called from get_remote_default_refs_for_fetch
 131         # leave the branches in branch.${curr_branch}.merge alone,
 132         # or the first one otherwise; add prefix . to the rest
 133         # to prevent the secondary branches to be merged by default.
 134         merge_branches=
 135         curr_branch=
 136         if test "$1" = "-d"
 137         then
 138                 shift ; remote="$1" ; shift
 139                 if test "$remote" = "$(get_default_remote)"
 140                 then
 141                         curr_branch=$(git-symbolic-ref HEAD | \
 142                             sed -e 's|^refs/heads/||')
 143                         merge_branches=$(git-repo-config \
 144                             --get-all "branch.${curr_branch}.merge") ||
 145                         merge_branches=.this.would.never.match.any.ref.
 146                 fi
 147                 set x $(expand_refs_wildcard "$@")
 148                 shift
 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 $merge_branches
 169                         do
 170                             [ "$remote" = "$merge_branch" ] &&
 171                             dot_prefix= && break
 172                         done
 173                 fi
 174                 case "$remote" in
 175                 '') remote=HEAD ;;
 176                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 177                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 178                 *) remote="refs/heads/$remote" ;;
 179                 esac
 180                 case "$local" in
 181                 '') local= ;;
 182                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 183                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 184                 *) local="refs/heads/$local" ;;
 185                 esac
 186
 187                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 188                 then
 189                    git-check-ref-format "$local_ref_name" ||
 190                    die "* refusing to create funny ref '$local_ref_name' locally"
 191                 fi
 192                 echo "${dot_prefix}${force}${remote}:${local}"
 193         done
 194 }
 195
 196 # Returns list of src: (no store), or src:dst (store)
 197 get_remote_default_refs_for_fetch () {
 198         data_source=$(get_data_source "$1")
 199         case "$data_source" in
 200         '' | config-partial | branches-partial)
 201                 echo "HEAD:" ;;
 202         config)
 203                 canon_refs_list_for_fetch -d "$1" \
 204                         $(git-repo-config --get-all "remote.$1.fetch") ;;
 205         branches)
 206                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 207                 case "$remote_branch" in '') remote_branch=master ;; esac
 208                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 209                 ;;
 210         remotes)
 211                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 212                                                 s///p
 213                                         }' "$GIT_DIR/remotes/$1")
 214                 ;;
 215         *)
 216                 die "internal error: get-remote-default-ref-for-push $1" ;;
 217         esac
 218 }
 219
 220 get_remote_refs_for_push () {
 221         case "$#" in
 222         0) die "internal error: get-remote-refs-for-push." ;;
 223         1) get_remote_default_refs_for_push "$@" ;;
 224         *) shift; echo "$@" ;;
 225         esac
 226 }
 227
 228 get_remote_refs_for_fetch () {
 229         case "$#" in
 230         0)
 231             die "internal error: get-remote-refs-for-fetch." ;;
 232         1)
 233             get_remote_default_refs_for_fetch "$@" ;;
 234         *)
 235             shift
 236             tag_just_seen=
 237             for ref
 238             do
 239                 if test "$tag_just_seen"
 240                 then
 241                     echo "refs/tags/${ref}:refs/tags/${ref}"
 242                     tag_just_seen=
 243                     continue
 244                 else
 245                     case "$ref" in
 246                     tag)
 247                         tag_just_seen=yes
 248                         continue
 249                         ;;
 250                     esac
 251                 fi
 252                 canon_refs_list_for_fetch "$ref"
 253             done
 254             ;;
 255         esac
 256 }
 257
 258 resolve_alternates () {
 259         # original URL (xxx.git)
 260         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 261         while read path
 262         do
 263                 case "$path" in
 264                 \#* | '')
 265                         continue ;;
 266                 /*)
 267                         echo "$top_$path/" ;;
 268                 ../*)
 269                         # relative -- ugly but seems to work.
 270                         echo "$1/objects/$path/" ;;
 271                 *)
 272                         # exit code may not be caught by the reader.
 273                         echo "bad alternate: $path"
 274                         exit 1 ;;
 275                 esac
 276         done
 277 }