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                (
 115                        IFS='   '
 116                        while read sha1 name
 117                        do
 118                                mapped=${name#"$from"}
 119                                if test "z$name" != "z${name%'^{}'}" ||
 120                                        test "z$name" = "z$mapped"
 121                                then
 122                                        continue
 123                                fi
 124                                echo "${local_force}${name}:${to}${mapped}"
 125                        done
 126                )
 127        done
 128}
 129
 130# Subroutine to canonicalize remote:local notation.
 131canon_refs_list_for_fetch () {
 132        # If called from get_remote_default_refs_for_fetch
 133        # leave the branches in branch.${curr_branch}.merge alone,
 134        # or the first one otherwise; add prefix . to the rest
 135        # to prevent the secondary branches to be merged by default.
 136        merge_branches=
 137        found_mergeref=
 138        curr_branch=
 139        if test "$1" = "-d"
 140        then
 141                shift ; remote="$1" ; shift
 142                if test "$remote" = "$(get_default_remote)"
 143                then
 144                        curr_branch=$(git-symbolic-ref HEAD | \
 145                            sed -e 's|^refs/heads/||')
 146                        merge_branches=$(git-repo-config \
 147                            --get-all "branch.${curr_branch}.merge")
 148                fi
 149                set x $(expand_refs_wildcard "$@")
 150                shift
 151        fi
 152        for ref
 153        do
 154                force=
 155                case "$ref" in
 156                +*)
 157                        ref=$(expr "z$ref" : 'z+\(.*\)')
 158                        force=+
 159                        ;;
 160                esac
 161                expr "z$ref" : 'z.*:' >/dev/null || ref="${ref}:"
 162                remote=$(expr "z$ref" : 'z\([^:]*\):')
 163                local=$(expr "z$ref" : 'z[^:]*:\(.*\)')
 164                dot_prefix=.
 165                if test -z "$merge_branches"
 166                then
 167                        merge_branches=$remote
 168                        dot_prefix=
 169                else
 170                        for merge_branch in $merge_branches
 171                        do
 172                            [ "$remote" = "$merge_branch" ] &&
 173                            dot_prefix= && break
 174                        done
 175                fi
 176                if test -z $dot_prefix
 177                then
 178                        found_mergeref=true
 179                fi
 180                case "$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        if test -z "$found_mergeref" -a "$curr_branch"
 201        then
 202                echo >&2 "Warning: No merge candidate found because value of config option
 203         \"branch.${curr_branch}.merge\" does not match any remote branch fetched."
 204        fi
 205}
 206
 207# Returns list of src: (no store), or src:dst (store)
 208get_remote_default_refs_for_fetch () {
 209        data_source=$(get_data_source "$1")
 210        case "$data_source" in
 211        '' | config-partial | branches-partial)
 212                echo "HEAD:" ;;
 213        config)
 214                canon_refs_list_for_fetch -d "$1" \
 215                        $(git-repo-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 $1" ;;
 228        esac
 229}
 230
 231get_remote_refs_for_push () {
 232        case "$#" 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
 239get_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
 269resolve_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}