Fix userguide bug (#2932)

[i3/i3] / i3-dmenu-desktop

diff --git a/i3-dmenu-desktop b/i3-dmenu-desktop
index 2c54233d02501a57bb776cf7dad0260aea777a4f..aee5dc2f4e32eeb4b82099dc0633e1a911a6e0e4 100755 (executable)
--- a/i3-dmenu-desktop
+++ b/i3-dmenu-desktop
@@ -1,7 +1,7 @@
 #!/usr/bin/env perl
 # vim:ts=4:sw=4:expandtab
 #
-# © 2012-2014 Michael Stapelberg
+# © 2012 Michael Stapelberg
 #
 # No dependencies except for perl ≥ v5.10
 
@@ -25,7 +25,11 @@ binmode STDERR, ':utf8';
 # reads in a whole file
 sub slurp {
     my ($filename) = @_;
-    open(my $fh, '<', $filename) or die "$!";
+    my $fh;
+    if (!open($fh, '<', $filename)) {
+        warn "Could not open $filename: $!";
+        return undef;
+    }
     local $/;
     my $result;
     eval {
@@ -45,7 +49,7 @@ my $result = GetOptions(
     'dmenu=s' => \$dmenu_cmd,
     'entry-type=s' => \@entry_types,
     'version' => sub {
-        say "dmenu-desktop 1.5 © 2012-2013 Michael Stapelberg";
+        say "dmenu-desktop 1.5 © 2012 Michael Stapelberg";
         exit 0;
     },
     'help' => sub {
@@ -275,16 +279,42 @@ for my $app (keys %apps) {
         }
 
         $choices{$name} = $app;
+        next;
     }
 
     if ((scalar grep { $_ eq 'command' } @entry_types) > 0) {
-        my ($command) = split(' ', $apps{$app}->{Exec});
+        my $command = $apps{$app}->{Exec};
+
+        # Handle escape sequences (should be done for all string values, but does
+        # matter here).
+        my %escapes = (
+            '\\s' => ' ',
+            '\\n' => '\n',
+            '\\t' => '\t',
+            '\\r' => '\r',
+            '\\\\' => '\\',
+        );
+        $command =~ s/(\\[sntr\\])/$escapes{$1}/go;
+
+        # Extract executable
+        if ($command =~ m/^\s*([^\s\"]+)(?:\s|$)/) {
+            # No quotes
+            $command = $1;
+        } elsif ($command =~ m/^\s*\"([^\"\\]*(?:\\.[^\"\\]*)*)\"(?:\s|$)/) {
+            # Quoted, remove quotes and fix escaped characters
+            $command = $1;
+            $command =~ s/\\([\"\`\$\\])/$1/g;
+        } else {
+            # Invalid quotes, fallback to whitespace
+            ($command) = split(' ', $command);
+        }
 
         # Don’t add “geany” if “Geany” is already present.
         my @keys = map { lc } keys %choices;
-        next if (scalar grep { $_ eq lc(basename($command)) } @keys) > 0;
-
-        $choices{basename($command)} = $app;
+        if (!(scalar grep { $_ eq lc(basename($command)) } @keys) > 0) {
+            $choices{basename($command)} = $app;
+        }
+        next;
     }
 
     if ((scalar grep { $_ eq 'filename' } @entry_types) > 0) {
@@ -306,7 +336,7 @@ for my $app (keys %apps) {
 #   };
 
 # ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
-# ┃ Run dmenu to ask the user for her choice                                  ┃
+# ┃ Run dmenu to ask the user for their choice                                ┃
 # ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
 
 # open2 will just make dmenu’s STDERR go to our own STDERR.