Andrew's git / gitweb.git / git-fetch-script
?
git-fetch-scripton commit mailinfo: barf and exist upon nested multipart. (b893f09)
   1#!/bin/sh
   2#
   3. git-sh-setup-script || die "Not a git archive"
   4. git-parse-remote-script
   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
  58    # remote-nick is the URL given on the command line (or a shorthand)
  59    # remote-name is the $GIT_DIR relative refs/ path we computed
  60    # for this refspec.
  61    case "$remote_name_" in
  62    HEAD)
  63        note_= ;;
  64    refs/heads/*)
  65        note_="$(expr "$remote_name_" : 'refs/heads/\(.*\)')"
  66        note_="branch '$note_' of " ;;
  67    refs/tags/*)
  68        note_="$(expr "$remote_name_" : 'refs/tags/\(.*\)')"
  69        note_="tag '$note_' of " ;;
  70    *)
  71        note_="$remote_name of " ;;
  72    esac
  73    remote_1_=$(expr "$remote_" : '\(.*\)\.git/*$') &&
  74        remote_="$remote_1_"
  75    note_="$note_$remote_"
  76
  77    # 2.6.11-tree tag would not be happy to be fed to resolve.
  78    if git-cat-file commit "$head_" >/dev/null 2>&1
  79    then
  80        headc_=$(git-rev-parse --verify "$head_^0") || exit
  81        echo "$headc_   $note_" >>$GIT_DIR/FETCH_HEAD
  82        echo >&2 "* committish: $head_"
  83        echo >&2 "  $note_"
  84    else
  85        echo >&2 "* non-commit: $head_"
  86        echo >&2 "  $note_"
  87    fi
  88    if test "$local_name_" != ""
  89    then
  90        # We are storing the head locally.  Make sure that it is
  91        # a fast forward (aka "reverse push").
  92        fast_forward_local "$local_name_" "$head_" "$note_"
  93    fi
  94}
  95
  96fast_forward_local () {
  97    case "$1" in
  98    refs/tags/*)
  99        # Tags need not be pointing at commits so there
 100        # is no way to guarantee "fast-forward" anyway.
 101        if test -f "$GIT_DIR/$1"
 102        then
 103                echo >&2 "* $1: updating with $3"
 104        else
 105                echo >&2 "* $1: storing $3"
 106        fi
 107        echo "$2" >"$GIT_DIR/$1" ;;
 108
 109    refs/heads/*)
 110        # NEEDSWORK: use the same cmpxchg protocol here.
 111        echo "$2" >"$GIT_DIR/$1.lock"
 112        if test -f "$GIT_DIR/$1"
 113        then
 114            local=$(git-rev-parse --verify "$1^0") &&
 115            mb=$(git-merge-base "$local" "$2") &&
 116            case "$2,$mb" in
 117            $local,*)
 118                echo >&2 "* $1: same as $3"
 119                ;;
 120            *,$local)
 121                echo >&2 "* $1: fast forward to $3"
 122                ;;
 123            *)
 124                false
 125                ;;
 126            esac || {
 127                echo >&2 "* $1: does not fast forward to $3;"
 128                case "$force,$single_force" in
 129                t,* | *,t)
 130                        echo >&2 "  forcing update."
 131                        ;;
 132                *)
 133                        mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1.remote"
 134                        echo >&2 "  leaving it in '$1.remote'"
 135                        ;;
 136                esac
 137            }
 138        else
 139                echo >&2 "* $1: storing $3"
 140        fi
 141        test -f "$GIT_DIR/$1.lock" &&
 142            mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1"
 143        ;;
 144    esac
 145}
 146
 147case "$update_head_ok" in
 148'')
 149        orig_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
 150        ;;
 151esac
 152
 153for ref in $(get_remote_refs_for_fetch "$@")
 154do
 155    refs="$refs $ref"
 156
 157    # These are relative path from $GIT_DIR, typically starting at refs/
 158    # but may be HEAD
 159    if expr "$ref" : '\+' >/dev/null
 160    then
 161        single_force=t
 162        ref=$(expr "$ref" : '\+\(.*\)')
 163    else
 164        single_force=
 165    fi
 166    remote_name=$(expr "$ref" : '\([^:]*\):')
 167    local_name=$(expr "$ref" : '[^:]*:\(.*\)')
 168
 169    rref="$rref $remote_name"
 170
 171    # There are transports that can fetch only one head at a time...
 172    case "$remote" in
 173    http://* | https://*)
 174        if [ -n "$GIT_SSL_NO_VERIFY" ]; then
 175            curl_extra_args="-k"
 176        fi
 177        head=$(curl -nsf $curl_extra_args "$remote/$remote_name") &&
 178        expr "$head" : "$_x40\$" >/dev/null ||
 179                die "Failed to fetch $remote_name from $remote"
 180        echo Fetching "$remote_name from $remote" using http
 181        git-http-pull -v -a "$head" "$remote/" || exit
 182        ;;
 183    rsync://*)
 184        TMP_HEAD="$GIT_DIR/TMP_HEAD"
 185        rsync -L "$remote/$remote_name" "$TMP_HEAD" || exit 1
 186        head=$(git-rev-parse TMP_HEAD)
 187        rm -f "$TMP_HEAD"
 188        test "$rsync_slurped_objects" || {
 189            rsync -avz --ignore-existing "$remote/objects/" \
 190                "$GIT_OBJECT_DIRECTORY/" || exit
 191            rsync_slurped_objects=t
 192        }
 193        ;;
 194    *)
 195        # We will do git native transport with just one call later.
 196        continue ;;
 197    esac
 198
 199    append_fetch_head "$head" "$remote" "$remote_name" "$remote_nick" "$local_name"
 200
 201done
 202
 203case "$remote" in
 204http://* | https://* | rsync://* )
 205    ;; # we are already done.
 206*)
 207    git-fetch-pack "$remote" $rref |
 208    while read sha1 remote_name
 209    do
 210        found=
 211        single_force=
 212        for ref in $refs
 213        do
 214            case "$ref" in
 215            +$remote_name:*)
 216                single_force=t
 217                found="$ref"
 218                break ;;
 219            $remote_name:*)
 220                found="$ref"
 221                break ;;
 222            esac
 223        done
 224
 225        local_name=$(expr "$found" : '[^:]*:\(.*\)')
 226        append_fetch_head "$sha1" "$remote" "$remote_name" "$remote_nick" "$local_name"
 227    done
 228    ;;
 229esac
 230
 231# If the original head was empty (i.e. no "master" yet), or
 232# if we were told not to worry, we do not have to check.
 233case ",$update_head_ok,$orig_head," in
 234*,, | t,* )
 235        ;;
 236*)
 237        curr_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
 238        if test "$curr_head" != "$orig_head"
 239        then
 240                echo "$orig_head" >$GIT_DIR/HEAD
 241                die "Cannot fetch into the current branch."
 242        fi
 243        ;;
 244esac