Improve error handling

README.md

@@ -5,12 +5,14 @@ App::termpub - read epubs in the terminal
 
 # SYNOPSIS
 
-termpub _file_...
+termpub _file_
 
 # DESCRIPTION
 
-termpub is a _terminal_ viewer for epubs. At startup termpub displays
-the first chapter with real content if possible.
+termpub is a _terminal_ viewer for epubs.
+
+At startup termpub displays the first chapter with real content if
+possible. It will save your reading position and restore it.
 
 # KEY BINDINGS
 
@@ -30,6 +32,10 @@ the first chapter with real content if possible.
 
     Jump to the table of contents.
 
+- \[num\] %
+
+    Go to a line N percent into the chapter.
+
 - \[num\] g
 
     Go to line _num_ in the chapter, defaults to 1.

lib/App/termpub/Epub.pm

@@ -67,15 +67,15 @@ has archive => sub {
     my $filename = $self->filename;
     my $archive  = Archive::Zip->new;
     if ( eval { $archive->read($filename) } != AZ_OK ) {
-        die "Can't read $filename\n";
+        die "$filename can't be unzipped (is it an epub file?)\n";
     }
     my $mimetype = $archive->contents('mimetype');
     $mimetype =~ s/[\r\n]+//;
     if ( !$mimetype ) {
-        die "Missing mimetype for $filename\n";
+        die "Missing mimetype for $filename (is it an epub file?)\n";
     }
     if ( $mimetype ne 'application/epub+zip' ) {
-        die "Unknown mimetype $mimetype for $filename\n";
+        die "Unknown mimetype $mimetype for $filename (is it an epub file?)\n";
     }
     return $archive;
 };

script/termpub

@@ -6,22 +6,35 @@ use Curses;
 use lib 'lib';
 use App::termpub;
 use App::termpub::Epub;
+use Pod::Usage;
 
 initscr;
 noecho;
 cbreak;
 curs_set(0);
 
-for my $filename (@ARGV) {
+my $filename = shift;
 
-    my $epub = eval { App::termpub::Epub->new( filename => $filename ) };
+if ( !$filename ) {
+    endwin;
+    pod2usage(
+        -message    => 'Missing file',
+        -exitstatus => 1,
+        -verbose    => 0,
+    );
+}
+
+my $epub = App::termpub::Epub->new( filename => $filename );
 
-    if ( !$epub ) {
-        warn "$@\n";
-        next;
-    }
+eval { App::termpub->new( epub => $epub )->run };
 
-    App::termpub->new( epub => $epub )->run;
+if ($@) {
+    endwin;
+    pod2usage(
+        -message    => $@,
+        -exitstatus => 1,
+        -verbose    => 0,
+    );
 }
 
 END {
@@ -40,12 +53,14 @@ App::termpub - read epubs in the terminal
 
 =head1 SYNOPSIS
 
-termpub I<file>...
+termpub I<file>
 
 =head1 DESCRIPTION
 
-termpub is a I<terminal> viewer for epubs. At startup termpub displays
-the first chapter with real content if possible.
+termpub is a I<terminal> viewer for epubs.
+
+At startup termpub displays the first chapter with real content if
+possible. It will save your reading position and restore it.
 
 =head1 KEY BINDINGS