1 files changed, 44 insertions, 19 deletions

diff --git a/git-svn.perl b/git-svn.perl
index 506e1a605d..0ecf7a5923 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -2399,10 +2399,15 @@ sub rev_db_get {
 	$ret;
 }
 
+# Finds the first svn revision that exists on (if $eq_ok is true) or
+# before $rev for the current branch.  It will not search any lower
+# than $min_rev.  Returns the git commit hash and svn revision number
+# if found, else (undef, undef).
 sub find_rev_before {
-	my ($self, $rev, $eq_ok) = @_;
+	my ($self, $rev, $eq_ok, $min_rev) = @_;
 	--$rev unless $eq_ok;
-	while ($rev > 0) {
+	$min_rev ||= 1;
+	while ($rev >= $min_rev) {
 		if (my $c = $self->rev_db_get($rev)) {
 			return ($rev, $c);
 		}
@@ -2411,6 +2416,23 @@ sub find_rev_before {
 	return (undef, undef);
 }
 
+# Finds the first svn revision that exists on (if $eq_ok is true) or
+# after $rev for the current branch.  It will not search any higher
+# than $max_rev.  Returns the git commit hash and svn revision number
+# if found, else (undef, undef).
+sub find_rev_after {
+	my ($self, $rev, $eq_ok, $max_rev) = @_;
+	++$rev unless $eq_ok;
+	$max_rev ||= $self->rev_db_max();
+	while ($rev <= $max_rev) {
+		if (my $c = $self->rev_db_get($rev)) {
+			return ($rev, $c);
+		}
+		++$rev;
+	}
+	return (undef, undef);
+}
+
 sub _new {
 	my ($class, $repo_id, $ref_id, $path) = @_;
 	unless (defined $repo_id && length $repo_id) {
@@ -3701,6 +3723,7 @@ package Git::SVN::Log;
 use strict;
 use warnings;
 use POSIX qw/strftime/;
+use constant commit_log_separator => ('-' x 72) . "\n";
 use vars qw/$TZ $limit $color $pager $non_recursive $verbose $oneline
             %rusers $show_commit $incremental/;
 my $l_fmt;
@@ -3794,19 +3817,19 @@ sub git_svn_log_cmd {
 			push @cmd, $c;
 		}
 	} elsif (defined $r_max) {
-		my ($c_min, $c_max);
-		$c_max = $gs->rev_db_get($r_max);
-		$c_min = $gs->rev_db_get($r_min);
-		if (defined $c_min && defined $c_max) {
-			if ($r_max > $r_min) {
-				push @cmd, "--boundary", "$c_min..$c_max";
-			} else {
-				push @cmd, "--boundary", "$c_max..$c_min";
-			}
-		} elsif ($r_max > $r_min) {
-			push @cmd, $c_max;
+		if ($r_max < $r_min) {
+			($r_min, $r_max) = ($r_max, $r_min);
+		}
+		my (undef, $c_max) = $gs->find_rev_before($r_max, 1, $r_min);
+		my (undef, $c_min) = $gs->find_rev_after($r_min, 1, $r_max);
+		# If there are no commits in the range, both $c_max and $c_min
+		# will be undefined.  If there is at least 1 commit in the
+		# range, both will be defined.
+		return () if !defined $c_min || !defined $c_max;
+		if ($c_min eq $c_max) {
+			push @cmd, '--max-count=1', $c_min;
 		} else {
-			push @cmd, $c_min;
+			push @cmd, '--boundary', "$c_min..$c_max";
 		}
 	}
 	return (@cmd, @files);
@@ -3914,7 +3937,7 @@ sub show_commit_changed_paths {
 
 sub show_commit_normal {
 	my ($c) = @_;
-	print '-' x72, "\nr$c->{r} | ";
+	print commit_log_separator, "r$c->{r} | ";
 	print "$c->{c} | " if $show_commit;
 	print "$c->{a} | ", strftime("%Y-%m-%d %H:%M:%S %z (%a, %d %b %Y)",
 				 localtime($c->{t_utc})), ' | ';
@@ -3975,6 +3998,10 @@ sub cmd_show_log {
 
 	config_pager();
 	@args = git_svn_log_cmd($r_min, $r_max, @args);
+	if (!@args) {
+		print commit_log_separator unless $incremental || $oneline;
+		return;
+	}
 	my $log = command_output_pipe(@args);
 	run_pager();
 	my (@k, $c, $d, $stat);
@@ -4023,14 +4050,12 @@ sub cmd_show_log {
 		process_commit($c, $r_min, $r_max, \@k);
 	}
 	if (@k) {
-		my $swap = $r_max;
-		$r_max = $r_min;
-		$r_min = $swap;
+		($r_min, $r_max) = ($r_max, $r_min);
 		process_commit($_, $r_min, $r_max) foreach reverse @k;
 	}
 out:
 	close $log;
-	print '-' x72,"\n" unless $incremental || $oneline;
+	print commit_log_separator unless $incremental || $oneline;
 }
 
 package Git::SVN::Migration;