Dgit.pm: When checking that the tree is clean, check the git index too.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 15 insertions, 8 deletions

diff --git a/Debian/Dgit.pm b/Debian/Dgit.pm
index 7da60f6..3657aa1 100644
--- a/Debian/Dgit.pm
+++ b/Debian/Dgit.pm
@@ -445,14 +445,21 @@ sub git_for_each_tag_referring ($$) {
 }
 
 sub git_check_unmodified () {
-    my @cmd = qw(git diff --quiet HEAD);
-    debugcmd "+",@cmd;
-    $!=0; $?=-1; system @cmd;
-    return if !$?;
-    if ($?==256) {
-	fail "working tree is dirty (does not match HEAD)";
-    } else {
-	failedcmd @cmd;
+    foreach my $cached (qw(0 1)) {
+	my @cmd = qw(git diff --quiet);
+	push @cmd, qw(--cached) if $cached;
+	push @cmd, qw(HEAD);
+	debugcmd "+",@cmd;
+	$!=0; $?=-1; system @cmd;
+	return if !$?;
+	if ($?==256) {
+	    fail
+		$cached
+		? "git index contains changes (does not match HEAD)"
+		: "working tree is dirty (does not match HEAD)";
+	} else {
+	    failedcmd @cmd;
+	}
     }
 }