Add a --help/-? option.

1 files changed, 11 insertions, 14 deletions

diff --git a/icevault b/icevault
index 71ecfb8..3ec9acb 100755
--- a/icevault
+++ b/icevault
@@ -21,7 +21,7 @@ use warnings;
 
 our $VERSION = '0.1';
 use Getopt::Long qw/:config posix_default no_ignore_case gnu_compat
-                            bundling auto_help auto_version/;
+                            bundling auto_version/;
 use Digest ();
 use Encode qw/decode_utf8 encode_utf8/;
 use File::Copy 'move';
@@ -77,10 +77,11 @@ sub warning($@) {
 # Print usage and exit.
 sub usage($) {
     my $rv = shift;
-    print STDERR "Usage: $0 [OPTIONS] [fill] scheme://hostname/identity\n"
-                ."   or: $0 [OPTIONS] insert [identity]\n"
-                ."   or: $0 [OPTIONS] dump identity\n";
-    myprintf \*STDERR, 'Try C<%s> for more information.', "$0 --help";
+    my $fh = $rv ? \*STDERR : \*STDOUT;
+    print $fh "Usage: $0 [OPTIONS] [fill] scheme://hostname/identity\n"
+             ."  or: $0 [OPTIONS] insert [identity]\n"
+             ."  or: $0 [OPTIONS] dump scheme://hostname/identity\n"
+             . "Consult the manual page for more information.\n";
     exit $rv;
 }
 
@@ -138,12 +139,8 @@ sub loadConfig($) {
         chomp;
         s/#.*//;         # ignore comments
         next if /^\s*$/; # ignore empty and blank lines
-        /^([-\@\w.]+)(?:\s*=\s*)(\p{print}*)/ or error "Can't parse config line: C<%s>", $_;
-        if ($2 eq '') {
-            delete $CONFIG{$1};
-        } else {
-            $CONFIG{$1} = $2;
-        }
+        /^([-\@\w.]+)(?:\s*=\s*)(\p{print}+)/ or error "Can't parse config line: C<%s>", $_;
+        $CONFIG{$1} //= $2;
     }
     close $CONFIG;
 }
@@ -435,14 +432,14 @@ sub sha256_file($) {
 
 #######################################################################
 
+GetOptions(\%CONFIG, qw/debug show-passwords|p socket|s=s help|?/) or usage(1);
+usage(0) if $CONFIG{help};
+
 # Load configuration
 my $XDG_CONFIG_HOME = $ENV{XDG_CONFIG_HOME} // "$ENV{HOME}/.config";
 my $XDG_DATA_HOME   = $ENV{XDG_DATA_HOME}   // "$ENV{HOME}/.data";
 loadConfig "$XDG_CONFIG_HOME/icevault";
 
-# Override options from command line
-GetOptions(\%CONFIG, qw/debug show-passwords|p socket|s=s/) or usage(1);
-
 # Default options
 $CONFIG{gpg} //= 'gpg';
 $CONFIG{socket} //= 'S.IceVault';