Re: [PATCH 2/2] use new Git::config_path() for aliasesfile

[Junio C Hamano <gitster@pobox.com>]

I think the addition of "config --path" support is a good idea, but the
resulting code suffers from too many cut&paste cruft across the config*
family of methods.

How about doing a bit of refactoring, perhaps something like this, on top
as a separate patch?

I tried to be careful to still forcing the "one value only" for config_bool
and config_int, but extra sets of eyeballs would be needed.

 perl/Git.pm |   93 +++++++++++++++++-----------------------------------------
 1 files changed, 27 insertions(+), 66 deletions(-)

diff --git a/perl/Git.pm b/perl/Git.pm
index c279bfb..f0a6e92 100644
--- a/perl/Git.pm
+++ b/perl/Git.pm
@@ -563,22 +563,18 @@ sub wc_chdir {
 }
 
 
-=item config ( VARIABLE )
+=item _config_common ( VARIABLE )
 
-Retrieve the configuration C<VARIABLE> in the same manner as C<config>
-does. In scalar context requires the variable to be set only one time
-(exception is thrown otherwise), in array context returns allows the
-variable to be set multiple times and returns all the values.
-
-This currently wraps command('config') so it is not so fast.
+Common subroutine to implement bulk of what the config* family of methods
+do. This wraps command('config') so it is not so fast.
 
 =cut
 
-sub config {
-	my ($self, $var) = _maybe_self(@_);
-
+sub _config_common {
+	my ($self, $var, $opts) = _maybe_self(@_);
+	
 	try {
-		my @cmd = ('config');
+		my @cmd = ('config', $opts->{'kind'} ? @{$opts->{'kind'}} : ());
 		unshift @cmd, $self if $self;
 		if (wantarray) {
 			return command(@cmd, '--get-all', $var);
@@ -594,6 +590,21 @@ sub config {
 			throw $E;
 		}
 	};
+
+}
+
+=item config ( VARIABLE )
+
+Retrieve the configuration C<VARIABLE> in the same manner as C<config>
+does. In scalar context requires the variable to be set only one time
+(exception is thrown otherwise), in array context returns allows the
+variable to be set multiple times and returns all the values.
+
+=cut
+
+sub config {
+	my ($self, $var) = _maybe_self(@_);
+	return _config_common($self, $var, +{});
 }
 
 
@@ -603,60 +614,24 @@ Retrieve the bool configuration C<VARIABLE>. The return value
 is usable as a boolean in perl (and C<undef> if it's not defined,
 of course).
 
-This currently wraps command('config') so it is not so fast.
-
 =cut
 
 sub config_bool {
 	my ($self, $var) = _maybe_self(@_);
-
-	try {
-		my @cmd = ('config', '--bool', '--get', $var);
-		unshift @cmd, $self if $self;
-		my $val = command_oneline(@cmd);
-		return undef unless defined $val;
-		return $val eq 'true';
-	} catch Git::Error::Command with {
-		my $E = shift;
-		if ($E->value() == 1) {
-			# Key not found.
-			return undef;
-		} else {
-			throw $E;
-		}
-	};
+	my $val = scalar _config_common($self, $var, {'kind' => '--bool'});
+	return (defined $val && $val eq 'true');
 }
 
-
 =item config_path ( VARIABLE )
 
 Retrieve the path configuration C<VARIABLE>. The return value
 is an expanded path or C<undef> if it's not defined.
 
-This currently wraps command('config') so it is not so fast.
-
 =cut
 
 sub config_path {
 	my ($self, $var) = _maybe_self(@_);
-
-	try {
-		my @cmd = ('config', '--path');
-		unshift @cmd, $self if $self;
-		if (wantarray) {
-			return command(@cmd, '--get-all', $var);
-		} else {
-			return command_oneline(@cmd, '--get', $var);
-		}
-	} catch Git::Error::Command with {
-		my $E = shift;
-		if ($E->value() == 1) {
-			# Key not found.
-			return undef;
-		} else {
-			throw $E;
-		}
-	};
+	return _config_common($self, $var, +{'kind' => '--path'});
 }
 
 =item config_int ( VARIABLE )
@@ -667,26 +642,12 @@ or 'g' in the config file will cause the value to be multiplied
 by 1024, 1048576 (1024^2), or 1073741824 (1024^3) prior to output.
 It would return C<undef> if configuration variable is not defined,
 
-This currently wraps command('config') so it is not so fast.
-
 =cut
 
 sub config_int {
 	my ($self, $var) = _maybe_self(@_);
-
-	try {
-		my @cmd = ('config', '--int', '--get', $var);
-		unshift @cmd, $self if $self;
-		return command_oneline(@cmd);
-	} catch Git::Error::Command with {
-		my $E = shift;
-		if ($E->value() == 1) {
-			# Key not found.
-			return undef;
-		} else {
-			throw $E;
-		}
-	};
+	my $val = scalar _config_common($self, $var, +{'kind' => '--int'});
+	return $val;
 }
 
 =item get_colorbool ( NAME )