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 "$1" in
   9         */*)
  10                 echo ''
  11                 ;;
  12         *)
  13                 if test "$(git-config --get "remote.$1.url")"
  14                 then
  15                         echo config
  16                 elif test -f "$GIT_DIR/remotes/$1"
  17                 then
  18                         echo remotes
  19                 elif test -f "$GIT_DIR/branches/$1"
  20                 then
  21                         echo branches
  22                 else
  23                         echo ''
  24                 fi ;;
  25         esac
  26 }
  27
  28 get_remote_url () {
  29         data_source=$(get_data_source "$1")
  30         case "$data_source" in
  31         '')
  32                 echo "$1"
  33                 ;;
  34         config)
  35                 git-config --get "remote.$1.url"
  36                 ;;
  37         remotes)
  38                 sed -ne '/^URL: */{
  39                         s///p
  40                         q
  41                 }' "$GIT_DIR/remotes/$1"
  42                 ;;
  43         branches)
  44                 sed -e 's/#.*//' "$GIT_DIR/branches/$1"
  45                 ;;
  46         *)
  47                 die "internal error: get-remote-url $1" ;;
  48         esac
  49 }
  50
  51 get_default_remote () {
  52         curr_branch=$(git-symbolic-ref -q HEAD | sed -e 's|^refs/heads/||')
  53         origin=$(git-config --get "branch.$curr_branch.remote")
  54         echo ${origin:-origin}
  55 }
  56
  57 get_remote_default_refs_for_push () {
  58         data_source=$(get_data_source "$1")
  59         case "$data_source" in
  60         '' | branches)
  61                 ;; # no default push mapping, just send matching refs.
  62         config)
  63                 git-config --get-all "remote.$1.push" ;;
  64         remotes)
  65                 sed -ne '/^Push: */{
  66                         s///p
  67                 }' "$GIT_DIR/remotes/$1" ;;
  68         *)
  69                 die "internal error: get-remote-default-ref-for-push $1" ;;
  70         esac
  71 }
  72
  73 # Called from canon_refs_list_for_fetch -d "$remote", which
  74 # is called from get_remote_default_refs_for_fetch to grok
  75 # refspecs that are retrieved from the configuration, but not
  76 # from get_remote_refs_for_fetch when it deals with refspecs
  77 # supplied on the command line.  $ls_remote_result has the list
  78 # of refs available at remote.
  79 #
  80 # The first token returned is either "explicit" or "glob"; this
  81 # is to help prevent randomly "globbed" ref from being chosen as
  82 # a merge candidate
  83 expand_refs_wildcard () {
  84         echo "$ls_remote_result" |
  85         git fetch--tool expand-refs-wildcard "-" "$@"
  86 }
  87
  88 # Subroutine to canonicalize remote:local notation.
  89 canon_refs_list_for_fetch () {
  90         # If called from get_remote_default_refs_for_fetch
  91         # leave the branches in branch.${curr_branch}.merge alone,
  92         # or the first one otherwise; add prefix . to the rest
  93         # to prevent the secondary branches to be merged by default.
  94         merge_branches=
  95         curr_branch=
  96         if test "$1" = "-d"
  97         then
  98                 shift ; remote="$1" ; shift
  99                 set $(expand_refs_wildcard "$remote" "$@")
 100                 is_explicit="$1"
 101                 shift
 102                 if test "$remote" = "$(get_default_remote)"
 103                 then
 104                         curr_branch=$(git-symbolic-ref -q HEAD | \
 105                             sed -e 's|^refs/heads/||')
 106                         merge_branches=$(git-config \
 107                             --get-all "branch.${curr_branch}.merge")
 108                 fi
 109                 if test -z "$merge_branches" && test $is_explicit != explicit
 110                 then
 111                         merge_branches=..this.will.never.match.any.ref..
 112                 fi
 113         fi
 114         for ref
 115         do
 116                 force=
 117                 case "$ref" in
 118                 +*)
 119                         ref=$(expr "z$ref" : 'z+\(.*\)')
 120                         force=+
 121                         ;;
 122                 esac
 123                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 124                 remote=$(expr "z$ref" : 'z\([^:]*\):')
 125                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 126                 dot_prefix=.
 127                 if test -z "$merge_branches"
 128                 then
 129                         merge_branches=$remote
 130                         dot_prefix=
 131                 else
 132                         for merge_branch in $merge_branches
 133                         do
 134                             [ "$remote" = "$merge_branch" ] &&
 135                             dot_prefix= && break
 136                         done
 137                 fi
 138                 case "$remote" in
 139                 '' | HEAD ) remote=HEAD ;;
 140                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 141                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 142                 *) remote="refs/heads/$remote" ;;
 143                 esac
 144                 case "$local" in
 145                 '') local= ;;
 146                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 147                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 148                 *) local="refs/heads/$local" ;;
 149                 esac
 150
 151                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 152                 then
 153                    git-check-ref-format "$local_ref_name" ||
 154                    die "* refusing to create funny ref '$local_ref_name' locally"
 155                 fi
 156                 echo "${dot_prefix}${force}${remote}:${local}"
 157         done
 158 }
 159
 160 # Returns list of src: (no store), or src:dst (store)
 161 get_remote_default_refs_for_fetch () {
 162         data_source=$(get_data_source "$1")
 163         case "$data_source" in
 164         '')
 165                 echo "HEAD:" ;;
 166         config)
 167                 canon_refs_list_for_fetch -d "$1" \
 168                         $(git-config --get-all "remote.$1.fetch") ;;
 169         branches)
 170                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 171                 case "$remote_branch" in '') remote_branch=master ;; esac
 172                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 173                 ;;
 174         remotes)
 175                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 176                                                 s///p
 177                                         }' "$GIT_DIR/remotes/$1")
 178                 ;;
 179         *)
 180                 die "internal error: get-remote-default-ref-for-push $1" ;;
 181         esac
 182 }
 183
 184 get_remote_refs_for_push () {
 185         case "$#" in
 186         0) die "internal error: get-remote-refs-for-push." ;;
 187         1) get_remote_default_refs_for_push "$@" ;;
 188         *) shift; echo "$@" ;;
 189         esac
 190 }
 191
 192 get_remote_refs_for_fetch () {
 193         case "$#" in
 194         0)
 195             die "internal error: get-remote-refs-for-fetch." ;;
 196         1)
 197             get_remote_default_refs_for_fetch "$@" ;;
 198         *)
 199             shift
 200             tag_just_seen=
 201             for ref
 202             do
 203                 if test "$tag_just_seen"
 204                 then
 205                     echo "refs/tags/${ref}:refs/tags/${ref}"
 206                     tag_just_seen=
 207                     continue
 208                 else
 209                     case "$ref" in
 210                     tag)
 211                         tag_just_seen=yes
 212                         continue
 213                         ;;
 214                     esac
 215                 fi
 216                 canon_refs_list_for_fetch "$ref"
 217             done
 218             ;;
 219         esac
 220 }
 221
 222 resolve_alternates () {
 223         # original URL (xxx.git)
 224         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 225         while read path
 226         do
 227                 case "$path" in
 228                 \#* | '')
 229                         continue ;;
 230                 /*)
 231                         echo "$top_$path/" ;;
 232                 ../*)
 233                         # relative -- ugly but seems to work.
 234                         echo "$1/objects/$path/" ;;
 235                 *)
 236                         # exit code may not be caught by the reader.
 237                         echo "bad alternate: $path"
 238                         exit 1 ;;
 239                 esac
 240         done
 241 }
 242
 243 get_uploadpack () {
 244         data_source=$(get_data_source "$1")
 245         case "$data_source" in
 246         config)
 247                 uplp=$(git-config --get "remote.$1.uploadpack")
 248                 echo ${uplp:-git-upload-pack}
 249                 ;;
 250         *)
 251                 echo "git-upload-pack"
 252                 ;;
 253         esac
 254 }