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 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.  $ls_remote_result has the list
  78 # of refs available at remote.
  79 expand_refs_wildcard () {
  80         for ref
  81         do
  82                 lref=${ref#'+'}
  83                 # a non glob pattern is given back as-is.
  84                 expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
  85                         echo "$ref"
  86                         continue
  87                 }
  88
  89                 from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
  90                 to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
  91                 local_force=
  92                 test "z$lref" = "z$ref" || local_force='+'
  93                 echo "$ls_remote_result" |
  94                 sed -e '/\^{}$/d' |
  95                 (
  96                         IFS='   '
  97                         while read sha1 name
  98                         do
  99                                 # ignore the ones that do not start with $from
 100                                 mapped=${name#"$from"}
 101                                 test "z$name" = "z$mapped" && continue
 102                                 echo "${local_force}${name}:${to}${mapped}"
 103                         done
 104                 )
 105         done
 106 }
 107
 108 # Subroutine to canonicalize remote:local notation.
 109 canon_refs_list_for_fetch () {
 110         # If called from get_remote_default_refs_for_fetch
 111         # leave the branches in branch.${curr_branch}.merge alone,
 112         # or the first one otherwise; add prefix . to the rest
 113         # to prevent the secondary branches to be merged by default.
 114         merge_branches=
 115         curr_branch=
 116         if test "$1" = "-d"
 117         then
 118                 shift ; remote="$1" ; shift
 119                 set x $(expand_refs_wildcard "$@")
 120                 shift
 121                 if test "$remote" = "$(get_default_remote)"
 122                 then
 123                         curr_branch=$(git-symbolic-ref HEAD | \
 124                             sed -e 's|^refs/heads/||')
 125                         merge_branches=$(git-repo-config \
 126                             --get-all "branch.${curr_branch}.merge")
 127                 fi
 128         fi
 129         for ref
 130         do
 131                 force=
 132                 case "$ref" in
 133                 +*)
 134                         ref=$(expr "z$ref" : 'z+\(.*\)')
 135                         force=+
 136                         ;;
 137                 esac
 138                 expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 139                 remote=$(expr "z$ref" : 'z\([^:]*\):')
 140                 local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 141                 dot_prefix=.
 142                 if test -z "$merge_branches"
 143                 then
 144                         merge_branches=$remote
 145                         dot_prefix=
 146                 else
 147                         for merge_branch in $merge_branches
 148                         do
 149                             [ "$remote" = "$merge_branch" ] &&
 150                             dot_prefix= && break
 151                         done
 152                 fi
 153                 case "$remote" in
 154                 '') remote=HEAD ;;
 155                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 156                 heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 157                 *) remote="refs/heads/$remote" ;;
 158                 esac
 159                 case "$local" in
 160                 '') local= ;;
 161                 refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 162                 heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 163                 *) local="refs/heads/$local" ;;
 164                 esac
 165
 166                 if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 167                 then
 168                    git-check-ref-format "$local_ref_name" ||
 169                    die "* refusing to create funny ref '$local_ref_name' locally"
 170                 fi
 171                 echo "${dot_prefix}${force}${remote}:${local}"
 172         done
 173 }
 174
 175 # Returns list of src: (no store), or src:dst (store)
 176 get_remote_default_refs_for_fetch () {
 177         data_source=$(get_data_source "$1")
 178         case "$data_source" in
 179         '')
 180                 echo "HEAD:" ;;
 181         config)
 182                 canon_refs_list_for_fetch -d "$1" \
 183                         $(git-repo-config --get-all "remote.$1.fetch") ;;
 184         branches)
 185                 remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 186                 case "$remote_branch" in '') remote_branch=master ;; esac
 187                 echo "refs/heads/${remote_branch}:refs/heads/$1"
 188                 ;;
 189         remotes)
 190                 canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 191                                                 s///p
 192                                         }' "$GIT_DIR/remotes/$1")
 193                 ;;
 194         *)
 195                 die "internal error: get-remote-default-ref-for-push $1" ;;
 196         esac
 197 }
 198
 199 get_remote_refs_for_push () {
 200         case "$#" in
 201         0) die "internal error: get-remote-refs-for-push." ;;
 202         1) get_remote_default_refs_for_push "$@" ;;
 203         *) shift; echo "$@" ;;
 204         esac
 205 }
 206
 207 get_remote_refs_for_fetch () {
 208         case "$#" in
 209         0)
 210             die "internal error: get-remote-refs-for-fetch." ;;
 211         1)
 212             get_remote_default_refs_for_fetch "$@" ;;
 213         *)
 214             shift
 215             tag_just_seen=
 216             for ref
 217             do
 218                 if test "$tag_just_seen"
 219                 then
 220                     echo "refs/tags/${ref}:refs/tags/${ref}"
 221                     tag_just_seen=
 222                     continue
 223                 else
 224                     case "$ref" in
 225                     tag)
 226                         tag_just_seen=yes
 227                         continue
 228                         ;;
 229                     esac
 230                 fi
 231                 canon_refs_list_for_fetch "$ref"
 232             done
 233             ;;
 234         esac
 235 }
 236
 237 resolve_alternates () {
 238         # original URL (xxx.git)
 239         top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 240         while read path
 241         do
 242                 case "$path" in
 243                 \#* | '')
 244                         continue ;;
 245                 /*)
 246                         echo "$top_$path/" ;;
 247                 ../*)
 248                         # relative -- ugly but seems to work.
 249                         echo "$1/objects/$path/" ;;
 250                 *)
 251                         # exit code may not be caught by the reader.
 252                         echo "bad alternate: $path"
 253                         exit 1 ;;
 254                 esac
 255         done
 256 }