Fix git-mv for moving directories with 1 file

This is fixed by putting the file into @changedfiles/@addedfiles,
and not the directory this file is in.

Additionally, this fixes the behavior for attempting to overwrite
a file with a directory, and gives a message for all cases where
overwriting is not possible (file->dir,dir->file,dir->dir).

Thanks for Alexander Litvinov for noting this problem.

Signed-off-by: Josef Weidendorfer <Josef.Weidendorfer@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/git-mv.perl b/git-mv.perl
index a21d87e..bf54c38 100755 (executable)
--- a/git-mv.perl
+++ b/git-mv.perl
@@ -103,13 +103,22 @@ while(scalar @srcArgs > 0) {
        $bad = "bad source '$src'";
     }
 
+    $safesrc = quotemeta($src);
+    @srcfiles = grep /^$safesrc(\/|$)/, @allfiles;
+
     $overwritten{$dst} = 0;
     if (($bad eq "") && -e $dst) {
        $bad = "destination '$dst' already exists";
-       if (-f $dst && $opt_f) {
-           print "Warning: $bad; will overwrite!\n";
-           $bad = "";
-           $overwritten{$dst} = 1;
+       if ($opt_f) {
+           # only files can overwrite each other: check both source and destination
+           if (-f $dst && (scalar @srcfiles == 1)) {
+               print "Warning: $bad; will overwrite!\n";
+               $bad = "";
+               $overwritten{$dst} = 1;
+           }
+           else {
+               $bad = "Can not overwrite '$src' with '$dst'";
+           }
        }
     }
     
@@ -118,8 +127,6 @@ while(scalar @srcArgs > 0) {
     }
 
     if ($bad eq "") {
-       $safesrc = quotemeta($src);
-       @srcfiles = grep /^$safesrc(\/|$)/, @allfiles;
         if (scalar @srcfiles == 0) {
            $bad = "'$src' not under version control";
        }
@@ -166,10 +173,12 @@ while(scalar @srcs > 0) {
 
     push @deletedfiles, @srcfiles;
     if (scalar @srcfiles == 1) {
+       # $dst can be a directory with 1 file inside
        if ($overwritten{$dst} ==1) {
-           push @changedfiles, $dst;
+           push @changedfiles, $dstfiles[0];
+
        } else {
-           push @addedfiles, $dst;
+           push @addedfiles, $dstfiles[0];
        }
     }
     else {