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         remote="$1"
  85         shift
  86         first_one=yes
  87         if test "$#" = 0
  88         then
  89                 echo empty
  90                 echo >&2 "Nothing specified for fetching with remote.$remote.fetch"
  91         fi
  92         for ref
  93         do
  94                 lref=${ref#'+'}
  95                 # a non glob pattern is given back as-is.
  96                 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
  97                         if test -n "$first_one"
  98                         then
  99                                 echo "explicit"
 100                                 first_one=
 101                         fi
 102                         echo "$ref"
 103                         continue
 104                 }
 105
 106                 # glob
 107                 if test -n "$first_one"
 108                 then
 109                         echo "glob"
 110                         first_one=
 111                 fi
 112                 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
 113                 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
 114                 local_force=
 115                 test "z$lref" = "z$ref" || local_force='+'
 116                 echo "$ls_remote_result" |
 117                 sed -e '/\^{}$/d' |
 118                 (
 119                         IFS='   '
 120                         while read sha1 name
 121                         do
 122                                 # ignore the ones that do not start with $from
 123                                 mapped=${name#"$from"}
 124                                 test "z$name" = "z$mapped" && continue
 125                                 echo "${local_force}${name}:${to}${mapped}"
 126                         done
 127                 )
 128         done
 129 }
 130
 131 # Subroutine to canonicalize remote:local notation.
 132 canon_refs_list_for_fetch () {
 133         # If called from get_remote_default_refs_for_fetch
 134         # leave the branches in branch.${curr_branch}.merge alone,
 135         # or the first one otherwise; add prefix . to the rest
 136         # to prevent the secondary branches to be merged by default.
 137         merge_branches=
 138         curr_branch=
 139         if test "$1" = "-d"
 140         then
 141                 shift ; remote="$1" ; shift
 142                 set $(expand_refs_wildcard "$remote" "$@")
 143                 is_explicit="$1"
 144                 shift
 145                 if test "$remote" = "$(get_default_remote)"
 146                 then
 147                         curr_branch=$(git-symbolic-ref -q HEAD | \
 148                             sed -e 's|^refs/heads/||')
 149                         merge_branches=$(git-config \
 150                             --get-all "branch.${curr_branch}.merge")
 151                 fi
 152                 if test -z "$merge_branches" && test $is_explicit != explicit
 153                 then
 154                         merge_branches=..this.will.never.match.any.ref..
 155                 fi
 156         fi
 157         for ref
 158         do
 159                 force=
 160                 case "$ref" in
 161                 +*)
 162                         ref=$(expr "z$ref" : 'z+\(.*\)')
 163                         force=+
 164                         ;;
 165                 esac
 166                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 167                 remote=$(expr "z$ref" : 'z\([^:]*\):')
 168                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 169                 dot_prefix=.
 170                 if test -z "$merge_branches"
 171                 then
 172                         merge_branches=$remote
 173                         dot_prefix=
 174                 else
 175                         for merge_branch in $merge_branches
 176                         do
 177                             if  test "$remote" = "$merge_branch" ||
 178                                 test "$local" = "$merge_branch"
 179                             then
 180                                     dot_prefix=
 181                                     break
 182                             fi
 183                         done
 184                 fi
 185                 case "$remote" in
 186                 '' | HEAD ) remote=HEAD ;;
 187                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 188                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 189                 *) remote="refs/heads/$remote" ;;
 190                 esac
 191                 case "$local" in
 192                 '') local= ;;
 193                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 194                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 195                 *) local="refs/heads/$local" ;;
 196                 esac
 197
 198                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 199                 then
 200                    git-check-ref-format "$local_ref_name" ||
 201                    die "* refusing to create funny ref '$local_ref_name' locally"
 202                 fi
 203                 echo "${dot_prefix}${force}${remote}:${local}"
 204         done
 205 }
 206
 207 # Returns list of src: (no store), or src:dst (store)
 208 get_remote_default_refs_for_fetch () {
 209         data_source=$(get_data_source "$1")
 210         case "$data_source" in
 211         '')
 212                 echo "HEAD:" ;;
 213         config)
 214                 canon_refs_list_for_fetch -d "$1" \
 215                         $(git-config --get-all "remote.$1.fetch") ;;
 216         branches)
 217                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 218                 case "$remote_branch" in '') remote_branch=master ;; esac
 219                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 220                 ;;
 221         remotes)
 222                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 223                                                 s///p
 224                                         }' "$GIT_DIR/remotes/$1")
 225                 ;;
 226         *)
 227                 die "internal error: get-remote-default-ref-for-push $1" ;;
 228         esac
 229 }
 230
 231 get_remote_refs_for_push () {
 232         case "$#" in
 233         0) die "internal error: get-remote-refs-for-push." ;;
 234         1) get_remote_default_refs_for_push "$@" ;;
 235         *) shift; echo "$@" ;;
 236         esac
 237 }
 238
 239 get_remote_refs_for_fetch () {
 240         case "$#" in
 241         0)
 242             die "internal error: get-remote-refs-for-fetch." ;;
 243         1)
 244             get_remote_default_refs_for_fetch "$@" ;;
 245         *)
 246             shift
 247             tag_just_seen=
 248             for ref
 249             do
 250                 if test "$tag_just_seen"
 251                 then
 252                     echo "refs/tags/${ref}:refs/tags/${ref}"
 253                     tag_just_seen=
 254                     continue
 255                 else
 256                     case "$ref" in
 257                     tag)
 258                         tag_just_seen=yes
 259                         continue
 260                         ;;
 261                     esac
 262                 fi
 263                 canon_refs_list_for_fetch "$ref"
 264             done
 265             ;;
 266         esac
 267 }
 268
 269 resolve_alternates () {
 270         # original URL (xxx.git)
 271         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 272         while read path
 273         do
 274                 case "$path" in
 275                 \#* | '')
 276                         continue ;;
 277                 /*)
 278                         echo "$top_$path/" ;;
 279                 ../*)
 280                         # relative -- ugly but seems to work.
 281                         echo "$1/objects/$path/" ;;
 282                 *)
 283                         # exit code may not be caught by the reader.
 284                         echo "bad alternate: $path"
 285                         exit 1 ;;
 286                 esac
 287         done
 288 }
 289
 290 get_uploadpack () {
 291         data_source=$(get_data_source "$1")
 292         case "$data_source" in
 293         config)
 294                 uplp=$(git-config --get "remote.$1.uploadpack")
 295                 echo ${uplp:-git-upload-pack}
 296                 ;;
 297         *)
 298                 echo "git-upload-pack"
 299                 ;;
 300         esac
 301 }