Convert Settings to the new config system

This makes all config options self-documenting.

Unknown or unparseable config settings and --option flags now cause a
warning.

1 files changed, 8 insertions, 15 deletions

diff --git a/perl/lib/Nix/Config.pm.in b/perl/lib/Nix/Config.pm.in
index f494e34a5e7b..4bdee7fd89f9 100644
--- a/perl/lib/Nix/Config.pm.in
+++ b/perl/lib/Nix/Config.pm.in
@@ -20,22 +20,15 @@ $useBindings = 1;
 %config = ();
 
 sub readConfig {
-    if (defined $ENV{'_NIX_OPTIONS'}) {
-        foreach my $s (split '\n', $ENV{'_NIX_OPTIONS'}) {
-            my ($n, $v) = split '=', $s, 2;
-            $config{$n} = $v;
-        }
-    } else {
-        my $config = "$confDir/nix.conf";
-        return unless -f $config;
-
-        open CONFIG, "<$config" or die "cannot open ‘$config’";
-        while (<CONFIG>) {
-            /^\s*([\w\-\.]+)\s*=\s*(.*)$/ or next;
-            $config{$1} = $2;
-        }
-        close CONFIG;
+    my $config = "$confDir/nix.conf";
+    return unless -f $config;
+
+    open CONFIG, "<$config" or die "cannot open ‘$config’";
+    while (<CONFIG>) {
+        /^\s*([\w\-\.]+)\s*=\s*(.*)$/ or next;
+        $config{$1} = $2;
     }
+    close CONFIG;
 }
 
 return 1;