Andrew's git / gitweb.git / git-fetch.sh
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git-fetch.shon commit [PATCH] HTTP partial transfer support fix. (4fa2197)
   1#!/bin/sh
   2#
   3. git-sh-setup || die "Not a git archive"
   4. git-parse-remote
   5_x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
   6_x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
   7
   8append=
   9force=
  10update_head_ok=
  11while case "$#" in 0) break ;; esac
  12do
  13        case "$1" in
  14        -a|--a|--ap|--app|--appe|--appen|--append)
  15                append=t
  16                ;;
  17        -f|--f|--fo|--for|--forc|--force)
  18                force=t
  19                ;;
  20        -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
  21        --update-he|--update-hea|--update-head|--update-head-|\
  22        --update-head-o|--update-head-ok)
  23                update_head_ok=t
  24                ;;
  25        *)
  26                break
  27                ;;
  28        esac
  29        shift
  30done
  31
  32case "$#" in
  330)
  34        test -f "$GIT_DIR/branches/origin" ||
  35                test -f "$GIT_DIR/remotes/origin" ||
  36                        die "Where do you want to fetch from today?"
  37        set origin ;;
  38esac
  39
  40remote_nick="$1"
  41remote=$(get_remote_url "$@")
  42refs=
  43rref=
  44rsync_slurped_objects=
  45
  46if test "" = "$append"
  47then
  48        : >$GIT_DIR/FETCH_HEAD
  49fi
  50
  51append_fetch_head () {
  52    head_="$1"
  53    remote_="$2"
  54    remote_name_="$3"
  55    remote_nick_="$4"
  56    local_name_="$5"
  57    case "$6" in
  58    t) not_for_merge_='not-for-merge' ;;
  59    '') not_for_merge_= ;;
  60    esac
  61
  62    # remote-nick is the URL given on the command line (or a shorthand)
  63    # remote-name is the $GIT_DIR relative refs/ path we computed
  64    # for this refspec.
  65    case "$remote_name_" in
  66    HEAD)
  67        note_= ;;
  68    refs/heads/*)
  69        note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
  70        note_="branch '$note_' of " ;;
  71    refs/tags/*)
  72        note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
  73        note_="tag '$note_' of " ;;
  74    *)
  75        note_="$remote_name of " ;;
  76    esac
  77    remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
  78        remote_="$remote_1_"
  79    note_="$note_$remote_"
  80
  81    # 2.6.11-tree tag would not be happy to be fed to resolve.
  82    if git-cat-file commit "$head_" >/dev/null 2>&1
  83    then
  84        headc_=$(git-rev-parse --verify "$head_^0") || exit
  85        echo "$headc_   $not_for_merge_ $note_" >>$GIT_DIR/FETCH_HEAD
  86        echo >&2 "* committish: $head_"
  87        echo >&2 "  $note_"
  88    else
  89        echo "$head_    not-for-merge   $note_" >>$GIT_DIR/FETCH_HEAD
  90        echo >&2 "* non-commit: $head_"
  91        echo >&2 "  $note_"
  92    fi
  93    if test "$local_name_" != ""
  94    then
  95        # We are storing the head locally.  Make sure that it is
  96        # a fast forward (aka "reverse push").
  97        fast_forward_local "$local_name_" "$head_" "$note_"
  98    fi
  99}
 100
 101fast_forward_local () {
 102    mkdir -p "$(dirname "$GIT_DIR/$1")"
 103    case "$1" in
 104    refs/tags/*)
 105        # Tags need not be pointing at commits so there
 106        # is no way to guarantee "fast-forward" anyway.
 107        if test -f "$GIT_DIR/$1"
 108        then
 109                echo >&2 "* $1: updating with $3"
 110        else
 111                echo >&2 "* $1: storing $3"
 112        fi
 113        git-update-ref "$1" "$2" 
 114        ;;
 115
 116    refs/heads/*)
 117        # $1 is the ref being updated.
 118        # $2 is the new value for the ref.
 119        local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
 120        if test "$local"
 121        then
 122            # Require fast-forward.
 123            mb=$(git-merge-base "$local" "$2") &&
 124            case "$2,$mb" in
 125            $local,*)
 126                echo >&2 "* $1: same as $3"
 127                ;;
 128            *,$local)
 129                echo >&2 "* $1: fast forward to $3"
 130                git-update-ref "$1" "$2" "$local"
 131                ;;
 132            *)
 133                false
 134                ;;
 135            esac || {
 136                echo >&2 "* $1: does not fast forward to $3;"
 137                case ",$force,$single_force," in
 138                *,t,*)
 139                        echo >&2 "  forcing update."
 140                        git-update-ref "$1" "$2" "$local"
 141                        ;;
 142                *)
 143                        echo >&2 "  not updating."
 144                        ;;
 145                esac
 146            }
 147        else
 148            echo >&2 "* $1: storing $3"
 149            git-update-ref "$1" "$2"
 150        fi
 151        ;;
 152    esac
 153}
 154
 155case "$update_head_ok" in
 156'')
 157        orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 158        ;;
 159esac
 160
 161for ref in $(get_remote_refs_for_fetch "$@")
 162do
 163    refs="$refs $ref"
 164
 165    # These are relative path from $GIT_DIR, typically starting at refs/
 166    # but may be HEAD
 167    if expr "$ref" : '\.' >/dev/null
 168    then
 169        not_for_merge=t
 170        ref=$(expr "$ref" : '\.\(.*\)')
 171    else
 172        not_for_merge=
 173    fi
 174    if expr "$ref" : '\+' >/dev/null
 175    then
 176        single_force=t
 177        ref=$(expr "$ref" : '\+\(.*\)')
 178    else
 179        single_force=
 180    fi
 181    remote_name=$(expr "$ref" : '\([^:]*\):')
 182    local_name=$(expr "$ref" : '[^:]*:\(.*\)')
 183
 184    rref="$rref $remote_name"
 185
 186    # There are transports that can fetch only one head at a time...
 187    case "$remote" in
 188    http://* | https://*)
 189        if [ -n "$GIT_SSL_NO_VERIFY" ]; then
 190            curl_extra_args="-k"
 191        fi
 192        head=$(curl -nsf $curl_extra_args "$remote/$remote_name") &&
 193        expr "$head" : "$_x40\$" >/dev/null ||
 194                die "Failed to fetch $remote_name from $remote"
 195        echo >&2 Fetching "$remote_name from $remote" using http
 196        git-http-fetch -v -a "$head" "$remote/" || exit
 197        ;;
 198    rsync://*)
 199        TMP_HEAD="$GIT_DIR/TMP_HEAD"
 200        rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
 201        head=$(git-rev-parse --verify TMP_HEAD)
 202        rm -f "$TMP_HEAD"
 203        test "$rsync_slurped_objects" || {
 204            rsync -av --ignore-existing --exclude info \
 205                "$remote/objects/" "$GIT_OBJECT_DIRECTORY/" || exit
 206
 207            # Look at objects/info/alternates for rsync -- http will
 208            # support it natively and git native ones will do it on the remote
 209            # end.  Not having that file is not a crime.
 210            rsync -q "$remote/objects/info/alternates" \
 211                "$GIT_DIR/TMP_ALT" 2>/dev/null ||
 212                rm -f "$GIT_DIR/TMP_ALT"
 213            if test -f "$GIT_DIR/TMP_ALT"
 214            then
 215                resolve_alternates "$remote" <"$GIT_DIR/TMP_ALT" |
 216                while read alt
 217                do
 218                    case "$alt" in 'bad alternate: '*) die "$alt";; esac
 219                    echo >&2 "Getting alternate: $alt"
 220                    rsync -av --ignore-existing --exclude info \
 221                    "$alt" "$GIT_OBJECT_DIRECTORY/" || exit
 222                done
 223                rm -f "$GIT_DIR/TMP_ALT"
 224            fi
 225            rsync_slurped_objects=t
 226        }
 227        ;;
 228    *)
 229        # We will do git native transport with just one call later.
 230        continue ;;
 231    esac
 232
 233    append_fetch_head "$head" "$remote" \
 234        "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
 235
 236done
 237
 238case "$remote" in
 239http://* | https://* | rsync://* )
 240    ;; # we are already done.
 241*)
 242    (
 243        git-fetch-pack "$remote" $rref || echo failed "$remote"
 244    ) |
 245    while read sha1 remote_name
 246    do
 247        case "$sha1" in
 248        failed)
 249                echo >&2 "Fetch failure: $remote"
 250                exit 1 ;;
 251        esac
 252        found=
 253        single_force=
 254        for ref in $refs
 255        do
 256            case "$ref" in
 257            +$remote_name:*)
 258                single_force=t
 259                not_for_merge=
 260                found="$ref"
 261                break ;;
 262            .+$remote_name:*)
 263                single_force=t
 264                not_for_merge=t
 265                found="$ref"
 266                break ;;
 267            .$remote_name:*)
 268                not_for_merge=t
 269                found="$ref"
 270                break ;;
 271            $remote_name:*)
 272                not_for_merge=
 273                found="$ref"
 274                break ;;
 275            esac
 276        done
 277        local_name=$(expr "$found" : '[^:]*:\(.*\)')
 278        append_fetch_head "$sha1" "$remote" \
 279                "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
 280    done || exit
 281    ;;
 282esac
 283
 284# If the original head was empty (i.e. no "master" yet), or
 285# if we were told not to worry, we do not have to check.
 286case ",$update_head_ok,$orig_head," in
 287*,, | t,* )
 288        ;;
 289*)
 290        curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
 291        if test "$curr_head" != "$orig_head"
 292        then
 293                git-update-ref HEAD "$orig_head"
 294                die "Cannot fetch into the current branch."
 295        fi
 296        ;;
 297esac