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 }