Add git-name-rev
[git.git] / git-fetch.sh
index 822b4cd..31e5f4c 100755 (executable)
@@ -5,6 +5,11 @@
 _x40='[0-9a-f][0-9a-f][0-9a-f][0-9a-f][0-9a-f]'
 _x40="$_x40$_x40$_x40$_x40$_x40$_x40$_x40$_x40"
 
+LF='
+'
+IFS="$LF"
+
+tags=
 append=
 force=
 update_head_ok=
@@ -17,6 +22,9 @@ do
        -f|--f|--fo|--for|--forc|--force)
                force=t
                ;;
+       -t|--t|--ta|--tag|--tags)
+               tags=t
+               ;;
        -u|--u|--up|--upd|--upda|--updat|--update|--update-|--update-h|\
        --update-he|--update-hea|--update-head|--update-head-|\
        --update-head-o|--update-head-ok)
@@ -45,7 +53,7 @@ rsync_slurped_objects=
 
 if test "" = "$append"
 then
-       : >$GIT_DIR/FETCH_HEAD
+       : >"$GIT_DIR/FETCH_HEAD"
 fi
 
 append_fetch_head () {
@@ -54,6 +62,10 @@ append_fetch_head () {
     remote_name_="$3"
     remote_nick_="$4"
     local_name_="$5"
+    case "$6" in
+    t) not_for_merge_='not-for-merge' ;;
+    '') not_for_merge_= ;;
+    esac
 
     # remote-nick is the URL given on the command line (or a shorthand)
     # remote-name is the $GIT_DIR relative refs/ path we computed
@@ -78,10 +90,11 @@ append_fetch_head () {
     if git-cat-file commit "$head_" >/dev/null 2>&1
     then
        headc_=$(git-rev-parse --verify "$head_^0") || exit
-       echo "$headc_   $note_" >>$GIT_DIR/FETCH_HEAD
+       echo "$headc_   $not_for_merge_ $note_" >>"$GIT_DIR/FETCH_HEAD"
        echo >&2 "* committish: $head_"
        echo >&2 "  $note_"
     else
+       echo "$head_    not-for-merge   $note_" >>"$GIT_DIR/FETCH_HEAD"
        echo >&2 "* non-commit: $head_"
        echo >&2 "  $note_"
     fi
@@ -101,18 +114,25 @@ fast_forward_local () {
        # is no way to guarantee "fast-forward" anyway.
        if test -f "$GIT_DIR/$1"
        then
-               echo >&2 "* $1: updating with $3"
+               if now_=$(cat "$GIT_DIR/$1") && test "$now_" = "$2"
+               then
+                       echo >&2 "* $1: same as $3"
+               else
+                       echo >&2 "* $1: updating with $3"
+               fi
        else
                echo >&2 "* $1: storing $3"
        fi
-       echo "$2" >"$GIT_DIR/$1" ;;
+       git-update-ref "$1" "$2" 
+       ;;
 
     refs/heads/*)
-       # NEEDSWORK: use the same cmpxchg protocol here.
-       echo "$2" >"$GIT_DIR/$1.lock"
-       if test -f "$GIT_DIR/$1"
+       # $1 is the ref being updated.
+       # $2 is the new value for the ref.
+       local=$(git-rev-parse --verify "$1^0" 2>/dev/null)
+       if test "$local"
        then
-           local=$(git-rev-parse --verify "$1^0") &&
+           # Require fast-forward.
            mb=$(git-merge-base "$local" "$2") &&
            case "$2,$mb" in
            $local,*)
@@ -120,43 +140,73 @@ fast_forward_local () {
                ;;
            *,$local)
                echo >&2 "* $1: fast forward to $3"
+               git-update-ref "$1" "$2" "$local"
                ;;
            *)
                false
                ;;
            esac || {
                echo >&2 "* $1: does not fast forward to $3;"
-               case "$force,$single_force" in
-               t,* | *,t)
+               case ",$force,$single_force," in
+               *,t,*)
                        echo >&2 "  forcing update."
+                       git-update-ref "$1" "$2" "$local"
                        ;;
                *)
-                       mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1.remote"
-                       echo >&2 "  leaving it in '$1.remote'"
+                       echo >&2 "  not updating."
                        ;;
                esac
            }
        else
-               echo >&2 "* $1: storing $3"
+           echo >&2 "* $1: storing $3"
+           git-update-ref "$1" "$2"
        fi
-       test -f "$GIT_DIR/$1.lock" &&
-           mv "$GIT_DIR/$1.lock" "$GIT_DIR/$1"
        ;;
     esac
 }
 
 case "$update_head_ok" in
 '')
-       orig_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
+       orig_head=$(git-rev-parse --verify HEAD 2>/dev/null)
        ;;
 esac
 
-for ref in $(get_remote_refs_for_fetch "$@")
+# If --tags (and later --heads or --all) is specified, then we are
+# not talking about defaults stored in Pull: line of remotes or
+# branches file, and just fetch those and refspecs explicitly given.
+# Otherwise we do what we always did.
+
+reflist=$(get_remote_refs_for_fetch "$@")
+if test "$tags"
+then
+       taglist=$(git-ls-remote --tags "$remote" |
+               sed -e '
+                       /\^/d
+                       s/^[^   ]*      //
+                       s/.*/&:&/')
+       if test "$#" -gt 1
+       then
+               # remote URL plus explicit refspecs; we need to merge them.
+               reflist="$reflist$LF$taglist"
+       else
+               # No explicit refspecs; fetch tags only.
+               reflist=$taglist
+       fi
+fi
+
+for ref in $reflist
 do
-    refs="$refs $ref"
+    refs="$refs$LF$ref"
 
     # These are relative path from $GIT_DIR, typically starting at refs/
     # but may be HEAD
+    if expr "$ref" : '\.' >/dev/null
+    then
+       not_for_merge=t
+       ref=$(expr "$ref" : '\.\(.*\)')
+    else
+       not_for_merge=
+    fi
     if expr "$ref" : '\+' >/dev/null
     then
        single_force=t
@@ -167,7 +217,7 @@ do
     remote_name=$(expr "$ref" : '\([^:]*\):')
     local_name=$(expr "$ref" : '[^:]*:\(.*\)')
 
-    rref="$rref $remote_name"
+    rref="$rref$LF$remote_name"
 
     # There are transports that can fetch only one head at a time...
     case "$remote" in
@@ -175,16 +225,21 @@ do
        if [ -n "$GIT_SSL_NO_VERIFY" ]; then
            curl_extra_args="-k"
        fi
-       head=$(curl -nsf $curl_extra_args "$remote/$remote_name") &&
+       remote_name_quoted=$(perl -e '
+           my $u = $ARGV[0];
+           $u =~ s{([^-a-zA-Z0-9/.])}{sprintf"%%%02x",ord($1)}eg;
+           print "$u";
+       ' "$remote_name")
+       head=$(curl -nsf $curl_extra_args "$remote/$remote_name_quoted") &&
        expr "$head" : "$_x40\$" >/dev/null ||
                die "Failed to fetch $remote_name from $remote"
-       echo Fetching "$remote_name from $remote" using http
+       echo >&2 Fetching "$remote_name from $remote" using http
        git-http-fetch -v -a "$head" "$remote/" || exit
        ;;
     rsync://*)
        TMP_HEAD="$GIT_DIR/TMP_HEAD"
        rsync -L -q "$remote/$remote_name" "$TMP_HEAD" || exit 1
-       head=$(git-rev-parse TMP_HEAD)
+       head=$(git-rev-parse --verify TMP_HEAD)
        rm -f "$TMP_HEAD"
        test "$rsync_slurped_objects" || {
            rsync -av --ignore-existing --exclude info \
@@ -216,7 +271,8 @@ do
        continue ;;
     esac
 
-    append_fetch_head "$head" "$remote" "$remote_name" "$remote_nick" "$local_name"
+    append_fetch_head "$head" "$remote" \
+       "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
 
 done
 
@@ -224,6 +280,7 @@ case "$remote" in
 http://* | https://* | rsync://* )
     ;; # we are already done.
 *)
+    IFS="      $LF"
     (
        git-fetch-pack "$remote" $rref || echo failed "$remote"
     ) |
@@ -241,16 +298,27 @@ http://* | https://* | rsync://* )
            case "$ref" in
            +$remote_name:*)
                single_force=t
+               not_for_merge=
+               found="$ref"
+               break ;;
+           .+$remote_name:*)
+               single_force=t
+               not_for_merge=t
+               found="$ref"
+               break ;;
+           .$remote_name:*)
+               not_for_merge=t
                found="$ref"
                break ;;
            $remote_name:*)
+               not_for_merge=
                found="$ref"
                break ;;
            esac
        done
-
        local_name=$(expr "$found" : '[^:]*:\(.*\)')
-       append_fetch_head "$sha1" "$remote" "$remote_name" "$remote_nick" "$local_name"
+       append_fetch_head "$sha1" "$remote" \
+               "$remote_name" "$remote_nick" "$local_name" "$not_for_merge"
     done || exit
     ;;
 esac
@@ -261,10 +329,10 @@ case ",$update_head_ok,$orig_head," in
 *,, | t,* )
        ;;
 *)
-       curr_head=$(cat "$GIT_DIR/HEAD" 2>/dev/null)
+       curr_head=$(git-rev-parse --verify HEAD 2>/dev/null)
        if test "$curr_head" != "$orig_head"
        then
-               echo "$orig_head" >$GIT_DIR/HEAD
+               git-update-ref HEAD "$orig_head"
                die "Cannot fetch into the current branch."
        fi
        ;;