[PATCH] Allow "+remote:local" refspec to cause --force when fetching.

With this we could say:

    Pull: master:ko-master +pu:ko-pu

to mean "fast forward ko-master with master, overwrite ko-pu with pu",
and the latter one does not require the remote "pu" to be descendant
of local "ko-pu".

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-fetch-script b/git-fetch-script
index dc7f4d6..d55cc85 100755 (executable)
--- a/git-fetch-script
+++ b/git-fetch-script
@@ -104,8 +104,8 @@ fast_forward_local () {
                ;;
            esac || {
                echo >&2 "* $1: does not fast forward to $4"
-               case "$force" in
-               t)
+               case "$force,$single_force" in
+               t,* | *,t)
                        echo >&2 "  from $3; forcing update."
                        ;;
                *)
@@ -130,6 +130,13 @@ do
 
     # These are relative path from $GIT_DIR, typically starting at refs/
     # but may be HEAD
+    if expr "$ref" : '\+' >/dev/null
+    then
+       single_force=t
+       ref=$(expr "$ref" : '\+\(.*\)')
+    else
+       single_force=
+    fi
     remote_name=$(expr "$ref" : '\([^:]*\):')
     local_name=$(expr "$ref" : '[^:]*:\(.*\)')
 
@@ -175,9 +182,14 @@ http://* | https://* | rsync://* )
     while read sha1 remote_name
     do
        found=
+       single_force=
        for ref in $refs
        do
            case "$ref" in
+           +$remote_name:*)
+               single_force=t
+               found="$ref"
+               break ;;
            $remote_name:*)
                found="$ref"
                break ;;
@@ -185,7 +197,7 @@ http://* | https://* | rsync://* )
        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"
     done
     ;;
 esac

diff --git a/git-parse-remote-script b/git-parse-remote-script
index 2da7ae8..cf37884 100755 (executable)
--- a/git-parse-remote-script
+++ b/git-parse-remote-script
@@ -5,7 +5,7 @@
 get_data_source () {
        case "$1" in
        */*)
-               # Not so fast.  This could be the partial URL shorthand...
+               # Not so fast.  This could be the partial URL shorthand...
                token=$(expr "$1" : '\([^/]*\)/')
                remainder=$(expr "$1" : '[^/]*/\(.*\)')
                if test -f "$GIT_DIR/branches/$token"
@@ -69,6 +69,13 @@ get_remote_default_refs_for_push () {
 canon_refs_list_for_fetch () {
        for ref
        do
+               force=
+               case "$ref" in
+               +*)
+                       ref=$(expr "$ref" : '\+\(.*\)')
+                       force=+
+                       ;;
+               esac
                expr "$ref" : '.*:' >/dev/null || ref="${ref}:"
                remote=$(expr "$ref" : '\([^:]*\):')
                local=$(expr "$ref" : '[^:]*:\(.*\)')
@@ -80,7 +87,7 @@ canon_refs_list_for_fetch () {
                '') local= ;;
                *) local="refs/heads/$local" ;;
                esac
-               echo "${remote}:${local}"
+               echo "${force}${remote}:${local}"
        done
 }
 
@@ -132,12 +139,12 @@ get_remote_refs_for_fetch () {
                else
                    case "$ref" in
                    tag)
-                       tag_just_seen=yes
+                       tag_just_seen=yes
                        continue
                        ;;
                    esac
                fi
-               canon_refs_list_for_fetch "$ref"
+               canon_refs_list_for_fetch "$ref"
            done
            ;;
        esac