New release

So, following initial feedback, I've made a few changes:

 - incomplete names and simple wildcards (? and *) are accepted in
   the RPMs box

 - the Clear button just clears the RPMs box (use the Update button
   to clear the local repo as well)

 - the current status is shown, which can be one of

    Enabled       : 'QA Testing' is enabled in the urpmi media and the
                    local repo contains what you see in the GUI

    Needs update  : 'QA Testing' is enabled in the urpmi media, but the
                    local repo is out of sync with what you see

    Updating      : what it says

    Update failed : one or more of the requested RPMs couldn't be fetched
                    from the remote repo (or some other error occurred).
                    You can try updating again in case it was a temporary
                    download error

    Disabled      : 'QA Testing' has been removed from the urpmi media
                    (but the local repo remains intact)

 - the dual-function button is now Enable/Update, depending on the current
   status (this should all become clear when you use the app.). In reality
   it does exactly the same thing in both cases - it's just another visual
   clue to show whether or not the local repo is in sync

2 files changed, 535 insertions, 75 deletions

diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..d159169
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
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+
+  Finally, any free program is threatened constantly by software
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+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
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+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
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+running the Program is not restricted, and the output from the Program
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+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
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+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
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+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
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+
+  2. You may modify your copy or copies of the Program or any portion
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+
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+
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+
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+    when run, you must cause it, when started running for such
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+    notice that there is no warranty (or else, saying that you provide
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+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
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+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
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+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
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+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/qarepo.pl b/qarepo.pl
index 877602c..957ce12 100644
--- a/qarepo.pl
+++ b/qarepo.pl
@@ -1,17 +1,57 @@
 #!/usr/bin/perl
 
+# Copyright (C) 2018 Mageia
+#                    Martin Whitaker <mageia@martin-whitaker.me.uk>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA.
+
 use strict;
-use Gtk3 '-init';
+use warnings;
+
+use File::Temp qw(tmpnam);
 use Glib qw(TRUE FALSE);
+use Gtk3 '-init';
 use MDK::Common;
 
+my $release = 'v1.1';
+
+###############################################################################
+# States and Status
+###############################################################################
+
+my %status_text = (
+    disabled => 'Disabled',
+    enabled  => 'Enabled',
+    changed  => 'Needs update',
+    failed   => 'Update failed'
+);
+
+my $state;
+
+###############################################################################
+# Initial Configuration
+###############################################################################
+
 my $home = $ENV{HOME} or die "ERROR: the HOME environment variable is not set.\n";
 
+# Only use sudo if not run by root.
 my $sudo = $> ? 'sudo' : '';
 
 my %config;
 
-my $config_file = $home . '/.qareporc';
+my $config_file = "$home/.qareporc";
 if (open(my $f, '<', $config_file)) {
     while (my $line = <$f>) {
         chomp($line);
@@ -24,20 +64,26 @@ if (open(my $f, '<', $config_file)) {
 my $mirror  = $config{MIRROR}  || 'rsync://mirrors.kernel.org/mirrors/mageia';
 my $version = $config{VERSION} || '6';
 my $arch    = $config{ARCH}    || 'x86_64';
-my $qa_repo = $config{QA_REPO} || $home . '/qa-testing';
+my $qa_repo = $config{QA_REPO} || "$home/qa-testing";
 
 my $qa_repo_name = 'QA Testing';
 
-my $list_url = `urpmq --list-url | grep '$qa_repo_name'`;
-chomp($list_url);
+my $repo_name_and_url = `urpmq --list-url | grep '$qa_repo_name '`;
+chomp($repo_name_and_url);
+
+my $active_qa_repo = $repo_name_and_url =~ s/$qa_repo_name +//r;
 
-my $active_qa_repo = $list_url =~ s/$qa_repo_name +//r;
-if ($list_url && $active_qa_repo ne $qa_repo) {
+if ($repo_name_and_url && $active_qa_repo ne $qa_repo) {
     disable_repo();
 }
+
 my $last_version = $version;
 my $last_arch    = $arch;
 
+###############################################################################
+# GUI
+###############################################################################
+
 my $window = Gtk3::Window->new('toplevel');
 
 my $grid = Gtk3::Grid->new();
@@ -59,13 +105,16 @@ my $entry5 = Gtk3::TextView->new();
 
 my $scroll = Gtk3::ScrolledWindow->new();
 
+my $label6 = Gtk3::Label->new('Status:');
+my $status = Gtk3::Label->new('');
+
 my $button1 = Gtk3::Button->new('Quit');
-my $button2 = Gtk3::Button->new($active_qa_repo ? 'Disable' : 'Enable');
-my $button3 = Gtk3::Button->new('Update');
+my $button2 = Gtk3::Button->new('Disable');
+my $button3 = Gtk3::Button->new('Enable');
 my $button4 = Gtk3::Button->new('Clear');
 
-$window->set_title('QA Repo');
-$window->set_default_size(500, 300);
+$window->set_title("QA Repo  $release");
+$window->set_default_size(600, 400);
 $window->set_border_width(10);
 $window->signal_connect(delete_event => \&quit);
 
@@ -109,16 +158,18 @@ $entry5->get_buffer->signal_connect(changed => \&changed);
 
 $scroll->set_hexpand(TRUE);
 $scroll->set_vexpand(TRUE);
-
 $scroll->add($entry5);
 
+$label6->set_halign('GTK_ALIGN_END');
+
+$status->set_halign('GTK_ALIGN_START');
+
 $button1->signal_connect(clicked => \&quit);
 
-$button2->signal_connect(clicked => \&enable_disable);
+$button2->signal_connect(clicked => \&disable);
 
-$button3->signal_connect(clicked => \&update);
+$button3->signal_connect(clicked => \&enable);
 $button3->set_valign('GTK_ALIGN_START');
-$button3->set_sensitive(FALSE);
 
 $button4->signal_connect(clicked => \&clear);
 $button4->set_valign('GTK_ALIGN_END');
@@ -133,6 +184,8 @@ $grid->attach($label4, 0, 2, 1, 1);
 $grid->attach($entry4, 1, 2, 4, 1);
 $grid->attach($label5, 0, 3, 1, 1);
 $grid->attach($scroll, 1, 3, 4, 2);
+$grid->attach($label6, 0, 5, 1, 1);
+$grid->attach($status, 1, 5, 4, 1);
 
 $grid->attach($button1, 5, 0, 1, 1);
 $grid->attach($button2, 5, 2, 1, 1);
@@ -140,21 +193,26 @@ $grid->attach($button3, 5, 3, 1, 1);
 $grid->attach($button4, 5, 4, 1, 1);
 
 $window->add($grid);
+
+if ($active_qa_repo) {
+    set_state('enabled');
+} else {
+    set_state('disabled');
+}
+
 $window->show_all;
 
 Gtk3->main;
 
-my $ignore_change;
+###############################################################################
+# GUI Callbacks
+###############################################################################
 
-sub changed() {
-    if ($ignore_change) {
-        $ignore_change = 0;
-    } else {
-        $button3->set_sensitive(TRUE);
-    }
+sub changed {
+    set_state('changed');
 }
 
-sub quit() {
+sub quit {
     get_settings();
     if (open(my $f, '>', $config_file)) {
         print $f "MIRROR=$mirror\n";
@@ -166,20 +224,13 @@ sub quit() {
     Gtk3->main_quit;
 }
 
-sub enable_disable() {
+sub disable {
     disable_buttons();
-    if ($active_qa_repo) {
-        disable_repo();
-    } else {
-        get_settings();
-        if (sync_repo()) {
-            enable_repo();
-        }
-    }
-    enable_buttons();
+    disable_repo();
+    set_state('disabled');
 }
 
-sub update() {
+sub enable {
     disable_buttons();
     get_settings();
     if (sync_repo()) {
@@ -193,38 +244,45 @@ sub update() {
             disable_repo();
         }
     }
-    enable_buttons();
+    if ($active_qa_repo) {
+        set_state('enabled');
+    } else {
+        set_state('failed');
+    }
 }
 
-my $clear_pending;
+sub clear {
+    $entry5->get_buffer()->set_text("");
+}
 
-sub clear() {
-    disable_buttons();
-    get_settings();
-    clear_repo();
-    if ($active_qa_repo) {
-        disable_repo();
+###############################################################################
+# Subsidiary Functions
+###############################################################################
+
+sub set_state {
+    my ($new_state) = @_;
+    $state = $new_state;
+    $status->set_label($status_text{$state});
+    $button1->set_sensitive(TRUE);
+    $button2->set_sensitive($active_qa_repo);
+    $button3->set_sensitive($state ne 'enabled');
+    $button4->set_sensitive(TRUE);
+    if ($state eq 'changed' || $state eq 'failed') {
+        $button3->set_label('Update');
+    } else {
+        $button3->set_label('Enable');
     }
-    my $buffer = $entry5->get_buffer();
-    $ignore_change = $buffer->get_char_count() > 0;
-    $buffer->set_text("");
-    enable_buttons();
 }
 
-sub disable_buttons() {
+sub disable_buttons {
     $button1->set_sensitive(FALSE);
     $button2->set_sensitive(FALSE);
     $button3->set_sensitive(FALSE);
     $button4->set_sensitive(FALSE);
+    gtk_update();
 }
 
-sub enable_buttons() {
-    $button1->set_sensitive(TRUE);
-    $button2->set_sensitive(TRUE);
-    $button4->set_sensitive(TRUE);
-}
-
-sub get_settings() {
+sub get_settings {
     $mirror  = $entry1->get_text();
     $version = $entry2->get_text();
     $arch    = $entry3->get_active_text();
@@ -234,7 +292,7 @@ sub get_settings() {
     }
 }
 
-sub get_required_rpms() {
+sub get_required_rpms {
     my $buffer = $entry5->get_buffer();
     my $start  = $buffer->get_start_iter();
     my $end    = $buffer->get_end_iter();
@@ -242,34 +300,33 @@ sub get_required_rpms() {
     grep { $_ ne '' } split("\n", $buffer->get_text($start, $end, FALSE));
 }
 
-sub get_existing_rpms() {
+sub get_existing_rpms {
     map { basename($_) } glob("$qa_repo/*.rpm");
 }
 
-sub disable_repo() {
+sub disable_repo {
     system("$sudo urpmi.removemedia '$qa_repo_name'") == 0
       or die "ERROR: couldn't disable the $qa_repo_name media.\n";
-    $button2->set_label('Enable');
     $active_qa_repo = '';
 }
 
-sub enable_repo() {
-    if (system("$sudo urpmi.addmedia --update '$qa_repo_name' $qa_repo") == 0) {
-        $button2->set_label('Disable');
+sub enable_repo {
+    if (system("$sudo urpmi.addmedia '$qa_repo_name' $qa_repo") == 0) {
         $active_qa_repo = $qa_repo;
     } else {
+        print "ERROR: couldn't enable the $qa_repo_name media.\n";
         $active_qa_repo = '';
     }
 }
 
-sub update_repo() {
+sub update_repo {
     if (system("$sudo urpmi.update '$qa_repo_name'") != 0) {
         print "ERROR: couldn't update the $qa_repo_name media.\n";
         disable_repo();
     }
 }
 
-sub clear_repo() {
+sub clear_repo {
     my @existing_rpms = get_existing_rpms();
     if (@existing_rpms) {
         unlink(map { "$qa_repo/$_" } @existing_rpms)
@@ -277,13 +334,19 @@ sub clear_repo() {
     }
 }
 
+my @available_rpms;
+
 my $sync_ok;
 
-sub sync_repo() {
+sub sync_repo {
+    $status->set_label('Updating');
+    $sync_ok = 1;
+
     my $sync_file;
     if      ($mirror =~ /^rsync:/) {
         $sync_file = \&sync_file_rsync;
-    } elsif ($mirror =~ /^ftp:/ || $mirror =~ /^http:/) {
+    } elsif ($mirror =~ /^ftp:/
+          || $mirror =~ /^http:/) {
         $sync_file = \&sync_file_aria2;
     } elsif ($mirror !~ /^\w+:/) {
         $sync_file = \&sync_file_link;
@@ -293,10 +356,44 @@ sub sync_repo() {
     }
 
     if ($version ne $last_version || $arch ne $last_arch) {
+        @available_rpms = ();
+        $last_version = $version;
+        $last_arch    = $arch;
         clear_repo();
+        gtk_update();
+    }
+
+    my $remote_repo = "$mirror/distrib/$version/$arch/media";
+
+    if (@available_rpms == 0) {
+        my $download_dir = "$qa_repo/.download";
+        mkdir_p($download_dir);
+        foreach my $media_type (qw(core nonfree tainted)) {
+            my $synthesis = 'synthesis.hdlist.cz';
+            my $remote_dir = "$remote_repo/$media_type/updates_testing/media_info";
+            &$sync_file("$remote_dir/$synthesis", $download_dir) or next;
+            my @package_list = split("\n", `urpmq --synthesis $download_dir/$synthesis --list -f`);
+            foreach my $package (@package_list) {
+                push(@available_rpms, "$package.rpm");
+            }
+            unlink("$download_dir/$synthesis")
+              or die "ERROR: couldn't delete/unlink $download_dir/$synthesis in the QA repo.\n";
+            gtk_update();
+        }
     }
 
-    my @required_rpms = get_required_rpms();
+    my @required_rpms = ();
+    foreach my $request (get_required_rpms()) {
+        my $pattern = wildcard_to_regexp($request);
+        my $matched = 0;
+        foreach my $candidate (@available_rpms) {
+            if ($candidate =~ /^$pattern/) {
+                push(@required_rpms, $candidate);
+                $matched = 1;
+            }
+        }
+        $matched or sync_error("no match for $request in the remote repository");
+    }
     my @existing_rpms = get_existing_rpms();
     my @unwanted_rpms = difference2(\@existing_rpms, \@required_rpms);
     if (@unwanted_rpms) {
@@ -309,26 +406,29 @@ sub sync_repo() {
           or die "ERROR: couldn't delete/unlink old pubkey in the QA repo.\n";
     }
 
-    mkdir_p("$qa_repo/media_info/");
+    mkdir_p("$qa_repo/media_info");
+    gtk_update();
 
-    $sync_ok = 1;
-    my $remote_repo = $mirror . '/distrib/' . $version . '/' . $arch . '/media';
     foreach my $rpm (difference2(\@required_rpms, \@existing_rpms)) {
         my $remote_url = $remote_repo;
         if ($rpm =~ /tainted/) {
-            $remote_url .= '/tainted/updates_testing/' . $rpm;
+            $remote_url .= "/tainted/updates_testing/$rpm";
         } elsif ($rpm =~ /nonfree/) {
-            $remote_url .= '/nonfree/updates_testing/' . $rpm;
+            $remote_url .= "/nonfree/updates_testing/$rpm";
         } else {
-            $remote_url .= '/core/updates_testing/' . $rpm;
+            $remote_url .= "/core/updates_testing/$rpm";
         }
         &$sync_file($remote_url, $qa_repo);
+        gtk_update();
     }
-    &$sync_file($remote_repo . '/core/updates_testing/media_info/pubkey', $qa_repo . '/media_info');
+    &$sync_file("$remote_repo/core/updates_testing/media_info/pubkey", "$qa_repo/media_info");
+    gtk_update();
 
     if ($sync_ok) {
-        system("genhdlist2 $qa_repo") == 0
+        system("genhdlist2 --allow-empty-media $qa_repo") == 0
           or sync_error("failed to update hdlist");
+    } else {
+        print "ERROR: failed to download all the files.\n"
     }
 
     $sync_ok;
@@ -345,7 +445,13 @@ sub sync_file_aria2 {
     my ($src_url, $dst_dir) = @_;
     print "fetching $src_url\n";
     system("aria2c -q -d $dst_dir $src_url") == 0
-      or sync_error("failed to download $src_url");
+      and return 1;
+
+    # aria2c leaves empty or partially downloaded files.
+    my $dst_file = $dst_dir . '/' . basename($src_url);
+    unlink($dst_file) if -e $dst_file;
+
+    sync_error("failed to download $src_url");
 }
 
 sub sync_file_link {
@@ -358,4 +464,19 @@ sub sync_error {
     my ($message) = @_;
     print "ERROR: $message.\n";
     $sync_ok = 0;
+    0;
+}
+
+sub wildcard_to_regexp {
+    my ($pattern) = @_;
+    $pattern =~ s/\./\\./g;
+    $pattern =~ s/\*/.*/g;
+    $pattern =~ s/\?/./g;
+    $pattern;
+}
+
+sub gtk_update {
+    while (Gtk3::events_pending()) {
+        Gtk3::main_iteration();
+    }
 }