Andrew's git - gitweb.git/blob - 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.
   5GIT_DIR=$(git-rev-parse --git-dir 2>/dev/null) || :;
   6
   7get_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/$1"
  31                then
  32                        echo branches
  33                else
  34                        echo ''
  35                fi ;;
  36        esac
  37}
  38
  39get_remote_url () {
  40        data_source=$(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 $1" ;;
  68        esac
  69}
  70
  71get_default_remote () {
  72        curr_branch=$(git-symbolic-ref HEAD | sed -e 's|^refs/heads/||')
  73        origin=$(git-repo-config --get "branch.$curr_branch.remote")
  74        echo ${origin:-origin}
  75}
  76
  77get_remote_default_refs_for_push () {
  78        data_source=$(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 $1" ;;
  90        esac
  91}
  92
  93# Called from canon_refs_list_for_fetch -d "$remote", which
  94# is called from get_remote_default_refs_for_fetch to grok
  95# refspecs that are retrieved from the configuration, but not
  96# from get_remote_refs_for_fetch when it deals with refspecs
  97# supplied on the command line.  $ls_remote_result has the list
  98# of refs available at remote.
  99expand_refs_wildcard () {
 100        for ref
 101        do
 102                lref=${ref#'+'}
 103                # a non glob pattern is given back as-is.
 104                expr "z$lref" : 'zrefs/.*/\*:refs/.*/\*$' >/dev/null || {
 105                        echo "$ref"
 106                        continue
 107                }
 108
 109                from=`expr "z$lref" : 'z\(refs/.*/\)\*:refs/.*/\*$'`
 110                to=`expr "z$lref" : 'zrefs/.*/\*:\(refs/.*/\)\*$'`
 111                local_force=
 112                test "z$lref" = "z$ref" || local_force='+'
 113                echo "$ls_remote_result" |
 114                sed -e '/\^{}$/d' |
 115                (
 116                        IFS='   '
 117                        while read sha1 name
 118                        do
 119                                # ignore the ones that do not start with $from
 120                                mapped=${name#"$from"}
 121                                test "z$name" = "z$mapped" && continue
 122                                echo "${local_force}${name}:${to}${mapped}"
 123                        done
 124                )
 125        done
 126}
 127
 128# Subroutine to canonicalize remote:local notation.
 129canon_refs_list_for_fetch () {
 130        # If called from get_remote_default_refs_for_fetch
 131        # leave the branches in branch.${curr_branch}.merge alone,
 132        # or the first one otherwise; add prefix . to the rest
 133        # to prevent the secondary branches to be merged by default.
 134        merge_branches=
 135        curr_branch=
 136        if test "$1" = "-d"
 137        then
 138                shift ; remote="$1" ; shift
 139                set x $(expand_refs_wildcard "$@")
 140                shift
 141                if test "$remote" = "$(get_default_remote)"
 142                then
 143                        curr_branch=$(git-symbolic-ref HEAD | \
 144                            sed -e 's|^refs/heads/||')
 145                        merge_branches=$(git-repo-config \
 146                            --get-all "branch.${curr_branch}.merge")
 147                fi
 148                # If we are fetching only one branch, then first branch
 149                # is the only thing that makes sense to merge anyway,
 150                # so there is no point refusing that traditional rule.
 151                if test $# != 1 && test "z$merge_branches" = z
 152                then
 153                        merge_branches=..this..would..never..match..
 154                fi
 155        fi
 156        for ref
 157        do
 158                force=
 159                case "$ref" in
 160                +*)
 161                        ref=$(expr "z$ref" : 'z+\(.*\)')
 162                        force=+
 163                        ;;
 164                esac
 165                expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 166                remote=$(expr "z$ref" : 'z\([^:]*\):')
 167                local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 168                dot_prefix=.
 169                if test -z "$merge_branches"
 170                then
 171                        merge_branches=$remote
 172                        dot_prefix=
 173                else
 174                        for merge_branch in $merge_branches
 175                        do
 176                            [ "$remote" = "$merge_branch" ] &&
 177                            dot_prefix= && break
 178                        done
 179                fi
 180                case "$remote" in
 181                '') remote=HEAD ;;
 182                refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 183                heads/* | tags/* | remotes/* ) remote="refs/$remote" ;;
 184                *) remote="refs/heads/$remote" ;;
 185                esac
 186                case "$local" in
 187                '') local= ;;
 188                refs/heads/* | refs/tags/* | refs/remotes/*) ;;
 189                heads/* | tags/* | remotes/* ) local="refs/$local" ;;
 190                *) local="refs/heads/$local" ;;
 191                esac
 192
 193                if local_ref_name=$(expr "z$local" : 'zrefs/\(.*\)')
 194                then
 195                   git-check-ref-format "$local_ref_name" ||
 196                   die "* refusing to create funny ref '$local_ref_name' locally"
 197                fi
 198                echo "${dot_prefix}${force}${remote}:${local}"
 199        done
 200}
 201
 202# Returns list of src: (no store), or src:dst (store)
 203get_remote_default_refs_for_fetch () {
 204        data_source=$(get_data_source "$1")
 205        case "$data_source" in
 206        '' | config-partial | branches-partial)
 207                echo "HEAD:" ;;
 208        config)
 209                canon_refs_list_for_fetch -d "$1" \
 210                        $(git-repo-config --get-all "remote.$1.fetch") ;;
 211        branches)
 212                remote_branch=$(sed -ne '/#/s/.*#//p' "$GIT_DIR/branches/$1")
 213                case "$remote_branch" in '') remote_branch=master ;; esac
 214                echo "refs/heads/${remote_branch}:refs/heads/$1"
 215                ;;
 216        remotes)
 217                canon_refs_list_for_fetch -d "$1" $(sed -ne '/^Pull: */{
 218                                                s///p
 219                                        }' "$GIT_DIR/remotes/$1")
 220                ;;
 221        *)
 222                die "internal error: get-remote-default-ref-for-push $1" ;;
 223        esac
 224}
 225
 226get_remote_refs_for_push () {
 227        case "$#" in
 228        0) die "internal error: get-remote-refs-for-push." ;;
 229        1) get_remote_default_refs_for_push "$@" ;;
 230        *) shift; echo "$@" ;;
 231        esac
 232}
 233
 234get_remote_refs_for_fetch () {
 235        case "$#" in
 236        0)
 237            die "internal error: get-remote-refs-for-fetch." ;;
 238        1)
 239            get_remote_default_refs_for_fetch "$@" ;;
 240        *)
 241            shift
 242            tag_just_seen=
 243            for ref
 244            do
 245                if test "$tag_just_seen"
 246                then
 247                    echo "refs/tags/${ref}:refs/tags/${ref}"
 248                    tag_just_seen=
 249                    continue
 250                else
 251                    case "$ref" in
 252                    tag)
 253                        tag_just_seen=yes
 254                        continue
 255                        ;;
 256                    esac
 257                fi
 258                canon_refs_list_for_fetch "$ref"
 259            done
 260            ;;
 261        esac
 262}
 263
 264resolve_alternates () {
 265        # original URL (xxx.git)
 266        top_=`expr "z$1" : 'z\([^:]*:/*[^/]*\)/'`
 267        while read path
 268        do
 269                case "$path" in
 270                \#* | '')
 271                        continue ;;
 272                /*)
 273                        echo "$top_$path/" ;;
 274                ../*)
 275                        # relative -- ugly but seems to work.
 276                        echo "$1/objects/$path/" ;;
 277                *)
 278                        # exit code may not be caught by the reader.
 279                        echo "bad alternate: $path"
 280                        exit 1 ;;
 281                esac
 282        done
 283}