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-repo-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-repo-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=$(git-repo-config --get "branch.$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-repo-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.  $ls_remote_result has the list
  78 # of refs available at remote.
  79 #
  80 # The first token returned is either "explicit" or "glob"; this
  81 # is to help prevent randomly "globbed" ref from being chosen as
  82 # a merge candidate
  83 expand_refs_wildcard () {
  84         first_one=yes
  85         for ref
  86         do
  87                 lref=${ref#'+'}
  88                 # a non glob pattern is given back as-is.
  89                 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
  90                         if test -n "$first_one"
  91                         then
  92                                 echo "explicit"
  93                                 first_one=
  94                         fi
  95                         echo "$ref"
  96                         continue
  97                 }
  98
  99                 # glob
 100                 if test -n "$first_one"
 101                 then
 102                         echo "glob"
 103                         first_one=
 104                 fi
 105                 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
 106                 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
 107                 local_force=
 108                 test "z$lref" = "z$ref" || local_force='+'
 109                 echo "$ls_remote_result" |
 110                 sed -e '/\^{}$/d' |
 111                 (
 112                         IFS='   '
 113                         while read sha1 name
 114                         do
 115                                 # ignore the ones that do not start with $from
 116                                 mapped=${name#"$from"}
 117                                 test "z$name" = "z$mapped" && continue
 118                                 echo "${local_force}${name}:${to}${mapped}"
 119                         done
 120                 )
 121         done
 122 }
 123
 124 # Subroutine to canonicalize remote:local notation.
 125 canon_refs_list_for_fetch () {
 126         # If called from get_remote_default_refs_for_fetch
 127         # leave the branches in branch.${curr_branch}.merge alone,
 128         # or the first one otherwise; add prefix . to the rest
 129         # to prevent the secondary branches to be merged by default.
 130         merge_branches=
 131         curr_branch=
 132         if test "$1" = "-d"
 133         then
 134                 shift ; remote="$1" ; shift
 135                 set $(expand_refs_wildcard "$@")
 136                 is_explicit="$1"
 137                 shift
 138                 if test "$remote" = "$(get_default_remote)"
 139                 then
 140                         curr_branch=$(git-symbolic-ref -q HEAD | \
 141                             sed -e 's|^refs/heads/||')
 142                         merge_branches=$(git-repo-config \
 143                             --get-all "branch.${curr_branch}.merge")
 144                 fi
 145                 if test -z "$merge_branches" && test $is_explicit != explicit
 146                 then
 147                         merge_branches=..this.will.never.match.any.ref..
 148                 fi
 149         fi
 150         for ref
 151         do
 152                 force=
 153                 case "$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 $merge_branches
 169                         do
 170                             if  test "$remote" = "$merge_branch" ||
 171                                 test "$local" = "$merge_branch"
 172                             then
 173                                     dot_prefix=
 174                                     break
 175                             fi
 176                         done
 177                 fi
 178                 case "$remote" in
 179                 '') remote=HEAD ;;
 180                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 181                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 182                 *) remote="refs/heads/$remote" ;;
 183                 esac
 184                 case "$local" in
 185                 '') local= ;;
 186                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 187                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 188                 *) local="refs/heads/$local" ;;
 189                 esac
 190
 191                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 192                 then
 193                    git-check-ref-format "$local_ref_name" ||
 194                    die "* refusing to create funny ref '$local_ref_name' locally"
 195                 fi
 196                 echo "${dot_prefix}${force}${remote}:${local}"
 197         done
 198 }
 199
 200 # Returns list of src: (no store), or src:dst (store)
 201 get_remote_default_refs_for_fetch () {
 202         data_source=$(get_data_source "$1")
 203         case "$data_source" in
 204         '')
 205                 echo "HEAD:" ;;
 206         config)
 207                 canon_refs_list_for_fetch -d "$1" \
 208                         $(git-repo-config --get-all "remote.$1.fetch") ;;
 209         branches)
 210                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 211                 case "$remote_branch" in '') remote_branch=master ;; esac
 212                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 213                 ;;
 214         remotes)
 215                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 216                                                 s///p
 217                                         }' "$GIT_DIR/remotes/$1")
 218                 ;;
 219         *)
 220                 die "internal error: get-remote-default-ref-for-push $1" ;;
 221         esac
 222 }
 223
 224 get_remote_refs_for_push () {
 225         case "$#" in
 226         0) die "internal error: get-remote-refs-for-push." ;;
 227         1) get_remote_default_refs_for_push "$@" ;;
 228         *) shift; echo "$@" ;;
 229         esac
 230 }
 231
 232 get_remote_refs_for_fetch () {
 233         case "$#" in
 234         0)
 235             die "internal error: get-remote-refs-for-fetch." ;;
 236         1)
 237             get_remote_default_refs_for_fetch "$@" ;;
 238         *)
 239             shift
 240             tag_just_seen=
 241             for ref
 242             do
 243                 if test "$tag_just_seen"
 244                 then
 245                     echo "refs/tags/${ref}:refs/tags/${ref}"
 246                     tag_just_seen=
 247                     continue
 248                 else
 249                     case "$ref" in
 250                     tag)
 251                         tag_just_seen=yes
 252                         continue
 253                         ;;
 254                     esac
 255                 fi
 256                 canon_refs_list_for_fetch "$ref"
 257             done
 258             ;;
 259         esac
 260 }
 261
 262 resolve_alternates () {
 263         # original URL (xxx.git)
 264         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 265         while read path
 266         do
 267                 case "$path" in
 268                 \#* | '')
 269                         continue ;;
 270                 /*)
 271                         echo "$top_$path/" ;;
 272                 ../*)
 273                         # relative -- ugly but seems to work.
 274                         echo "$1/objects/$path/" ;;
 275                 *)
 276                         # exit code may not be caught by the reader.
 277                         echo "bad alternate: $path"
 278                         exit 1 ;;
 279                 esac
 280         done
 281 }