From ac51e186036f8e7c09a9f71d971f54eaa2f0c821 Mon Sep 17 00:00:00 2001
From: Marius Gavrilescu <marius@ieval.ro>
Date: Sat, 22 Oct 2016 18:35:02 +0100
Subject: [PATCH] Mark optional modules as "recommends"

---
 Makefile.PL | 37 +++++++++++++++++++++++++++++--------
 README      |  7 ++++++-
 2 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/Makefile.PL b/Makefile.PL
index 9cb29a9..e5063e7 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -1,6 +1,30 @@
 use 5.014000;
 use ExtUtils::MakeMaker;
 
+my @optionals = (
+	qw/Audio::FLAC::Header           0
+	   Audio::Opusfile               0
+	   MP3::Info                     0
+	   MP4::Info                     0
+	   Ogg::Vorbis::Header::PurePerl 0/,
+);
+
+sub is_installed {
+	my ($module) = @_;
+	eval "require $module"
+}
+
+my @extra_prereqs;
+
+unless (grep \&is_installed, @optionals) {
+	my $answer = '';
+	while (!$answer) {
+		my $yn = lc prompt 'None of the optional dependencies are installed. Install all of them? (default: y) [y/n]', 'y';
+		$answer = $yn if $yn eq 'y' || $yn eq 'n';
+	}
+	@extra_prereqs = @optionals if $answer eq 'y';
+}
+
 WriteMakefile(
 	NAME             => 'App::MusicExpo',
 	VERSION_FROM     => 'lib/App/MusicExpo.pm',
@@ -11,19 +35,16 @@ WriteMakefile(
 	LICENSE          => 'perl',
 	SIGN             => 1,
 	PREREQ_PM        => {
-		qw/Audio::FLAC::Header           0
-		   Audio::Opusfile               0
-		   HTML::Template::Compiled      0
+		qw/HTML::Template::Compiled      0
 		   Memoize                       0
-		   MP3::Info                     0
-		   MP4::Info                     0
-		   DB_File                       0
-		   Ogg::Vorbis::Header::PurePerl 0/,
+		   DB_File                       0/,
+		@extra_prereqs
 	},
 	META_MERGE         => {
-		dynamic_config => 0,
+		dynamic_config => 1,
 		resources      => {
 			repository => 'http://git.ieval.ro/?p=app-musicexpo.git'
 		},
+		recommends     => { @optionals },
 	}
 );
diff --git a/README b/README
index 42debf7..340e4d7 100644
--- a/README
+++ b/README
@@ -27,9 +27,14 @@ DEPENDENCIES
 
 This module requires these other modules and libraries:
 
+  * HTML::Template::Compiled
+
+The following modules are optional; they determine the formats that
+can be read by MusicExpo. Be sure to install at least one of them,
+otherwise MusicExpo won't be able to do much!
+
   * Audio::FLAC::Header
   * Audio::Opusfile
-  * HTML::Template::Compiled
   * MP3::Info
   * MP4::Info
   * Ogg::Vorbis::Header::PurePerl
-- 
2.30.2