diff --git a/CMakeLists.txt b/CMakeLists.txt
index 28c5183..171890e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,111 +1,112 @@
 cmake_minimum_required(VERSION 3.0)
 project(kdesrc-build)
 
 # Needed for the docs, but optional. If not found, we will simply
 # defer to native CMake handling.
 find_package(ECM 5.10.0 NO_MODULE QUIET)
 
 if (ECM_FOUND)
     set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
     include(KDEInstallDirs)
     include(KDECMakeSettings)
     include(FeatureSummary)
     include(ECMOptionalAddSubdirectory)
 
     find_package(KF5 5.10.0 COMPONENTS DocTools)
 
     if(KF5_DocTools_FOUND)
         ecm_optional_add_subdirectory(doc)
     else()
         message(WARNING "Found ECM, but not KF5::DocTools; documentation will not be built")
     endif()
 else()
     message(WARNING "Did not find extra-cmake-modules; documentation will not be built and install paths will be guessed based on CMake settings.")
     # ECM now sets KDE_INSTALL_DATADIR to PREFIX/share, try to match
     set(KDE_INSTALL_DATADIR  "${CMAKE_INSTALL_PREFIX}/share" CACHE PATH "The parent directory where applications can install their data")
     set(KDE_INSTALL_BINDIR   "${CMAKE_INSTALL_PREFIX}/bin"  CACHE PATH "The install dir for executables")
 endif()
 
 set(KDESRC_BUILD_INSTALL_MODULES TRUE CACHE BOOL "Controls whether to install the modules that make up the script. Leave enabled unless running straight from source")
 set(KDESRC_BUILD_MODULE_INSTALL_PREFIX "${KDE_INSTALL_DATADIR}/kdesrc-build/modules" CACHE PATH "Prefix to install the component Perl modules to. (This is only an option to allow for installing to vendor_perl or similar)")
 
 if (KDESRC_BUILD_INSTALL_MODULES)
     message(STATUS "Installing component modules to ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}")
     install(FILES
         modules/ksb/Application.pm
         modules/ksb/BuildContext.pm
         modules/ksb/BuildException.pm
         modules/ksb/BuildSystem.pm
         modules/ksb/Debug.pm
         modules/ksb/DependencyResolver.pm
         modules/ksb/FirstRun.pm
         modules/ksb/IPC.pm
         modules/ksb/KDEProjectsReader.pm
         modules/ksb/Module.pm
         modules/ksb/ModuleResolver.pm
         modules/ksb/ModuleSet.pm
         modules/ksb/OptionsBase.pm
         modules/ksb/OSSupport.pm
         modules/ksb/PhaseList.pm
         modules/ksb/RecursiveFH.pm
         modules/ksb/StatusView.pm
         modules/ksb/Updater.pm
         modules/ksb/Util.pm
         modules/ksb/Version.pm
         modules/ksb/l10nSystem.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb)
 
     install(FILES
         modules/ksb/BuildSystem/Autotools.pm
+        modules/ksb/BuildSystem/Meson.pm
         modules/ksb/BuildSystem/CMakeBootstrap.pm
         modules/ksb/BuildSystem/KDE4.pm
         modules/ksb/BuildSystem/QMake.pm
         modules/ksb/BuildSystem/Qt4.pm
         modules/ksb/BuildSystem/Qt5.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb/BuildSystem)
 
     install(FILES
         modules/ksb/Module/BranchGroupResolver.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb/Module)
 
     install(FILES
         modules/ksb/ModuleSet/KDEProjects.pm
         modules/ksb/ModuleSet/Null.pm
         modules/ksb/ModuleSet/Qt.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb/ModuleSet)
 
     install(FILES
         modules/ksb/IPC/Null.pm
         modules/ksb/IPC/Pipe.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb/IPC)
 
     install(FILES
         modules/ksb/Updater/Bzr.pm
         modules/ksb/Updater/Git.pm
         modules/ksb/Updater/KDEProject.pm
         modules/ksb/Updater/KDEProjectMetadata.pm
         modules/ksb/Updater/Svn.pm
         modules/ksb/Updater/Qt5.pm
     DESTINATION ${KDESRC_BUILD_MODULE_INSTALL_PREFIX}/ksb/Updater)
 endif()
 
 install(PROGRAMS ${CMAKE_CURRENT_SOURCE_DIR}/kdesrc-build DESTINATION ${KDE_INSTALL_BINDIR})
 install(PROGRAMS ${CMAKE_CURRENT_SOURCE_DIR}/kdesrc-build-setup DESTINATION ${KDE_INSTALL_BINDIR})
 
 install(PROGRAMS
             ${CMAKE_SOURCE_DIR}/sample-kde-env-master.sh
             ${CMAKE_SOURCE_DIR}/sample-xsession.sh
             ${CMAKE_SOURCE_DIR}/custom-qt5-libs-build-include
             ${CMAKE_SOURCE_DIR}/qt5-build-include
             ${CMAKE_SOURCE_DIR}/kf5-applications-build-include
             ${CMAKE_SOURCE_DIR}/kf5-extragear-build-include
             ${CMAKE_SOURCE_DIR}/kf5-frameworks-build-include
             ${CMAKE_SOURCE_DIR}/kf5-kdepim-build-include
             ${CMAKE_SOURCE_DIR}/kf5-qt5-build-include
             ${CMAKE_SOURCE_DIR}/kf5-workspace-build-include
     DESTINATION ${KDE_INSTALL_DATADIR}/kdesrc-build)
 
 if (ECM_FOUND)
     feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)
 endif()
diff --git a/modules/ksb/BuildSystem/Meson.pm b/modules/ksb/BuildSystem/Meson.pm
new file mode 100644
index 0000000..e80d494
--- /dev/null
+++ b/modules/ksb/BuildSystem/Meson.pm
@@ -0,0 +1,62 @@
+package ksb::BuildSystem::Meson 0.10;
+
+# This is a module used to support configuring with Meson.
+# This is required for modules like telepathy-accounts-signon
+
+use strict;
+use warnings;
+use 5.014;
+
+use parent qw(ksb::BuildSystem);
+
+use ksb::BuildException;
+use ksb::Debug;
+use ksb::Util;
+
+sub name
+{
+    return 'meson';
+}
+
+# Return value style: boolean
+sub configureInternal
+{
+    my $self = assert_isa(shift, 'ksb::BuildSystem::Meson');
+    my $module = $self->module();
+    my $sourcedir = $module->fullpath('source');
+    my $installdir = $module->installationPath();
+
+    # 'module'-limited option grabbing can return undef, so use //
+    # to convert to empty string in that case.
+    my @setupOptions = split_quoted_on_whitespace(
+        $module->getOption('configure-flags', 'module') // '');
+
+    my $buildDir = $module->fullpath('build');
+    p_chdir($module->fullpath('source'));
+
+    return log_command($module, 'meson-setup', [
+            'meson', 'setup', $buildDir,
+            '--prefix', $installdir,
+            @setupOptions,
+        ]) == 0;
+}
+
+# Override
+sub buildCommands
+{
+    return 'ninja';
+}
+
+# Override
+sub requiredPrograms
+{
+    return 'meson';
+}
+
+# Override
+sub configuredModuleFileName
+{
+    return 'build.ninja';
+}
+
+1;
diff --git a/modules/ksb/Module.pm b/modules/ksb/Module.pm
index 47bede7..c878b3a 100644
--- a/modules/ksb/Module.pm
+++ b/modules/ksb/Module.pm
@@ -1,987 +1,995 @@
 package ksb::Module 0.20;
 
 # Class: Module
 #
 # Represents a source code module of some sort, which can be updated, built,
 # and installed. Includes a stringifying overload and can be sorted amongst
 # other ksb::Modules.
 
 use 5.014;
 use warnings;
 no if $] >= 5.018, 'warnings', 'experimental::smartmatch';
 
 use parent qw(ksb::OptionsBase);
 
 use ksb::IPC;
 use ksb::Debug;
 use ksb::Util;
 
 use ksb::l10nSystem;
 
 use ksb::Updater::Svn;
 use ksb::Updater::Git;
 use ksb::Updater::Bzr;
 use ksb::Updater::KDEProject;
 use ksb::Updater::KDEProjectMetadata;
 use ksb::Updater::Qt5;
 
 use ksb::BuildException 0.20;
 
 use ksb::BuildSystem 0.30;
 use ksb::BuildSystem::Autotools;
 use ksb::BuildSystem::QMake;
 use ksb::BuildSystem::Qt4;
 use ksb::BuildSystem::Qt5;
 use ksb::BuildSystem::KDE4;
 use ksb::BuildSystem::CMakeBootstrap;
+use ksb::BuildSystem::Meson;
 
 use ksb::ModuleSet::Null;
 
 use Storable 'dclone';
 use Carp 'confess';
 use Scalar::Util 'blessed';
 use overload
     '""' => 'toString', # Add stringify operator.
     '<=>' => 'compare',
     ;
 
 sub new
 {
     my ($class, $ctx, $name) = @_;
 
     croak_internal ("Empty ksb::Module constructed") unless $name;
 
     my $self = ksb::OptionsBase::new($class);
 
     # If building a BuildContext instead of a ksb::Module, then the context
     # can't have been setup yet...
     my $contextClass = 'ksb::BuildContext';
     if ($class ne $contextClass &&
         (!blessed($ctx) || !$ctx->isa($contextClass)))
     {
         croak_internal ("Invalid context $ctx");
     }
 
     # Clone the passed-in phases so we can be different.
     my $phases = dclone($ctx->phases()) if $ctx;
 
     my %newOptions = (
         name         => $name,
         scm_obj      => undef,
         build_obj    => undef,
         phases       => $phases,
         context      => $ctx,
         'module-set' => undef,
     );
 
     @{$self}{keys %newOptions} = values %newOptions;
 
     return $self;
 }
 
 sub phases
 {
     my $self = shift;
     return $self->{phases};
 }
 
 sub moduleSet
 {
     my ($self) = @_;
     $self->{'module-set'} //= ksb::ModuleSet::Null->new();
     return $self->{'module-set'};
 }
 
 sub setModuleSet
 {
     my ($self, $moduleSet) = @_;
     assert_isa($moduleSet, 'ksb::ModuleSet');
     $self->{'module-set'} = $moduleSet;
 }
 
 # Subroutine to retrieve a subdirectory path with tilde-expansion and
 # relative path handling.
 # The parameter is the option key (e.g. build-dir or log-dir) to read and
 # interpret.
 sub getSubdirPath
 {
     my ($self, $subdirOption) = @_;
     my $dir = $self->getOption($subdirOption);
 
     # If build-dir starts with a slash, it is an absolute path.
     return $dir if $dir =~ /^\//;
 
     # Make sure we got a valid option result.
     if (!$dir) {
         confess ("Reading option for $subdirOption gave empty \$dir!");
     }
 
     # If it starts with a tilde, expand it out.
     if ($dir =~ /^~/)
     {
         $dir =~ s/^~/$ENV{'HOME'}/;
     }
     else
     {
         # Relative directory, tack it on to the end of $kdesrcdir.
         my $kdesrcdir = $self->getOption('source-dir');
         $dir = "$kdesrcdir/$dir";
     }
 
     return $dir;
 }
 
 # Method: getInstallPathComponents
 #
 # Returns the directory that a module should be installed in.
 #
 # NOTE: The return value is a hash. The key 'module' will return the final
 # module name, the key 'path' will return the full path to the module. The
 # key 'fullpath' will return their concatenation.
 #
 # For example, with $module == 'KDE/kdelibs', and no change in the dest-dir
 # option, you'd get something like:
 #
 # > {
 # >   'path'     => '/home/user/kdesrc/KDE',
 # >   'module'   => 'kdelibs',
 # >   'fullpath' => '/home/user/kdesrc/KDE/kdelibs'
 # > }
 #
 # If dest-dir were changed to e.g. extragear-multimedia, you'd get:
 #
 # > {
 # >   'path'     => '/home/user/kdesrc',
 # >   'module'   => 'extragear-multimedia',
 # >   'fullpath' => '/home/user/kdesrc/extragear-multimedia'
 # > }
 #
 # Parameters:
 #   pathType - Either 'source' or 'build'.
 #
 # Returns:
 #   hash (Not a hashref; See description).
 sub getInstallPathComponents
 {
     my $module = assert_isa(shift, 'ksb::Module');
     my $type = shift;
     my $destdir = $module->destDir();
     my $srcbase = $module->getSourceDir();
     $srcbase = $module->getSubdirPath('build-dir') if $type eq 'build';
 
     my $combined = "$srcbase/$destdir";
 
     # Remove dup //
     $combined =~ s/\/+/\//;
 
     my @parts = split(/\//, $combined);
     my %result = ();
     $result{'module'} = pop @parts;
     $result{'path'} = join('/', @parts);
     $result{'fullpath'} = "$result{path}/$result{module}";
 
     my $compatDestDir = $module->destDir($module->name());
     my $fullCompatPath = "$srcbase/$compatDestDir";
 
     # We used to have code here to migrate very old directory layouts. It was
     # removed as of about 2013-09-29.
 
     return %result;
 }
 
 # Do note that this returns the *base* path to the source directory,
 # without the module name or kde_projects stuff appended. If you want that
 # use subroutine fullpath().
 sub getSourceDir
 {
     my $self = shift;
     return $self->getSubdirPath('source-dir');
 }
 
 sub name
 {
     my $self = shift;
     return $self->{name};
 }
 
 sub scm
 {
     my $self = shift;
 
     return $self->{scm_obj} if $self->{scm_obj};
 
     # Look for specific setting of repository and svn-server. If both is
     # set it's a bug, if one is set, that's the type (because the user says
     # so...). Don't use getOption($key) as it will try to fallback to
     # global options.
 
     my $svn_status = $self->getOption('svn-server', 'module');
     my $repository = $self->getOption('repository', 'module') // '';
     my $rcfile = $self->buildContext()->rcFile();
 
     if ($svn_status && $repository) {
         error (<<EOF);
 You have specified both y[b[svn-server] and y[b[repository] options for the
 b[$self] module in $rcfile.
 
 You should only specify one or the other -- a module cannot be both types
 - svn-server uses Subversion.
 - repository uses git.
 EOF
         die (make_exception('Config', 'svn-server and repository both set'));
     }
 
     # Overload repository to allow bzr URLs?
     if ($repository =~ /^bzr:\/\//) {
         $self->{scm_obj} = ksb::Updater::Bzr->new($self);
     }
 
     # If it needs a repo it's git. Everything else is svn for now.
     $self->{scm_obj} //=
         $repository
             ? ksb::Updater::Git->new($self)
             : ksb::Updater::Svn->new($self);
 
     return $self->{scm_obj};
 }
 
 sub setScmType
 {
     my ($self, $scmType) = @_;
 
     my $newType;
 
     given($scmType) {
         when('git')  { $newType = ksb::Updater::Git->new($self); }
         when('proj') { $newType = ksb::Updater::KDEProject->new($self); }
         when('metadata') { $newType = ksb::Updater::KDEProjectMetadata->new($self); }
         when('l10n') { $newType = ksb::l10nSystem->new($self); }
         when('svn')  { $newType = ksb::Updater::Svn->new($self); }
         when('bzr')  { $newType = ksb::Updater::Bzr->new($self); }
         when('qt5')  { $newType = ksb::Updater::Qt5->new($self); }
         default      { $newType = undef; }
     }
 
     $self->{scm_obj} = $newType;
 }
 
 # Returns a string describing the scm platform of the given module.
 # Return value: 'git' or 'svn' at this point, as appropriate.
 sub scmType
 {
     my $self = shift;
     return $self->scm()->name();
 }
 
 sub currentScmRevision
 {
     my $self = shift;
 
     return $self->scm()->currentRevisionInternal();
 }
 
 # Returns a new build system object, given the appropriate name.
 # This is a sub-optimal way to fix the problem of allowing users to override
 # the detected build system (we could instead use introspection to figure out
 # available build systems at runtime). However, KISS...
 sub buildSystemFromName
 {
     my ($self, $name) = @_;
     my %buildSystemClasses = (
         'generic'         => 'ksb::BuildSystem',
         'qmake'           => 'ksb::BuildSystem::QMake',
         'cmake-bootstrap' => 'ksb::BuildSystem::CMakeBootstrap',
         'kde'             => 'ksb::BuildSystem::KDE4',
         'qt'              => 'ksb::BuildSystem::Qt4',
         'qt5'             => 'ksb::BuildSystem::Qt5',
         'autotools'       => 'ksb::BuildSystem::Autotools',
+        'meson'           => 'ksb::BuildSystem::Meson',
     );
 
     my $class = $buildSystemClasses{lc $name} // undef;
     return $class->new($self) if ($class);
 
     # Past here, no class found
     croak_runtime("Invalid build system $name requested");
 }
 
 sub buildSystem
 {
     my $self = shift;
 
     if ($self->{build_obj} && $self->{build_obj}->name() ne 'generic') {
         return $self->{build_obj};
     }
 
     if (my $userBuildSystem = $self->getOption('override-build-system')) {
         $self->{build_obj} = $self->buildSystemFromName($userBuildSystem);
         return $self->{build_obj};
     }
 
     # If not set, let's guess.
     my $buildType;
     my $sourceDir = $self->fullpath('source');
 
     if (($self->getOption('repository') =~ /gitorious\.org\/qt\//) ||
         ($self->getOption('repository') =~ /^kde:qt$/) ||
         (-e "$sourceDir/bin/syncqt"))
     {
         $buildType = ksb::BuildSystem::Qt4->new($self);
     }
 
     # This test must come before the KDE buildsystem's as cmake's own
     # bootstrap system also has CMakeLists.txt
     if (!$buildType && (-e "$sourceDir/CMakeLists.txt") &&
         (-e "$sourceDir/bootstrap"))
     {
         $buildType = ksb::BuildSystem::CMakeBootstrap->new($self);
     }
 
     if (!$buildType && (-e "$sourceDir/CMakeLists.txt" ||
             $self->getOption('#xml-full-path')))
     {
         $buildType = ksb::BuildSystem::KDE4->new($self);
     }
 
     # We have to assign to an array to force glob to return all results,
     # otherwise it acts like a non-reentrant generator whose output depends on
     # how many times it's been called...
     if (!$buildType && (my @files = glob ("$sourceDir/*.pro"))) {
         $buildType = ksb::BuildSystem::QMake->new($self);
     }
 
     # 'configure' is a popular fall-back option even for other build
     # systems so ensure we check last for autotools.
     if (!$buildType &&
         (-e "$sourceDir/configure" || -e "$sourceDir/autogen.sh"))
     {
         $buildType = ksb::BuildSystem::Autotools->new($self);
     }
 
+    # Someday move this up, but for now ensure that Meson happens after
+    # configure/autotools support is checked for.
+    if (!$buildType && -e "$sourceDir/meson.build") {
+        $buildType = ksb::BuildSystem::Meson->new($self);
+    }
+
     # Don't just assume the build system is KDE-based...
     $buildType //= ksb::BuildSystem->new($self);
 
     $self->{build_obj} = $buildType;
 
     return $self->{build_obj};
 }
 
 # Sets the build system **object**, although you can find the build system
 # type afterwards (see buildSystemType).
 sub setBuildSystem
 {
     my ($self, $obj) = @_;
 
     assert_isa($obj, 'ksb::BuildSystem');
     $self->{build_obj} = $obj;
 }
 
 # Current possible build system types:
 # KDE (i.e. cmake), Qt, l10n (KDE language buildsystem), autotools (either
 # configure or autogen.sh). A final possibility is 'pendingSource' which
 # simply means that we don't know yet.
 #
 # If the build system type is not set ('pendingSource' counts as being
 # set!) when this function is called then it will be autodetected if
 # possible, but note that not all possible types will be detected this way.
 # If in doubt use setBuildSystemType
 sub buildSystemType
 {
     my $self = shift;
     return $self->buildSystem()->name();
 }
 
 # Subroutine to build this module.
 # Returns boolean false on failure, boolean true on success.
 sub build
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $moduleName = $self->name();
     my %pathinfo = $self->getInstallPathComponents('build');
     my $builddir = $pathinfo{'fullpath'};
     my $buildSystem = $self->buildSystem();
 
     if ($buildSystem->name() eq 'generic' && !pretending()) {
         error ("\tr[b[$self] does not seem to have a build system to use.");
         return 0;
     }
 
     # Ensure we're in a known directory before we start; some options remove
     # the old build directory that a previous module might have been using.
     super_mkdir($pathinfo{'path'});
     p_chdir($pathinfo{'path'});
 
     return 0 if !$self->setupBuildSystem();
     return 1 if $self->getOption('build-system-only');
 
     if (!$buildSystem->buildInternal())
     {
         return 0;
     }
 
     $self->setPersistentOption('last-build-rev', $self->currentScmRevision());
 
     # TODO: This should be a simple phase to run.
     if ($self->getOption('run-tests'))
     {
         $self->buildSystem()->runTestsuite();
     }
 
     # TODO: Likewise this should be a phase to run.
     if ($self->getOption('install-after-build'))
     {
         return 0 if !$self->install();
     }
     else
     {
         info ("\tSkipping install for y[$self]");
     }
 
     return 1;
 }
 
 # Subroutine to setup the build system in a directory.
 # Returns boolean true on success, boolean false (0) on failure.
 sub setupBuildSystem
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $moduleName = $self->name();
 
     my $buildSystem = $self->buildSystem();
 
     if ($buildSystem->name() eq 'generic' && !pretending()) {
         croak_internal('Build system determination still pending when build attempted.');
     }
 
     my $refreshReason = $buildSystem->needsRefreshed();
     if ($refreshReason ne "")
     {
         # The build system needs created, either because it doesn't exist, or
         # because the user has asked that it be completely rebuilt.
         info ("\tPreparing build system for y[$self].");
 
         # Check to see if we're actually supposed to go through the
         # cleaning process.
         if (!$self->getOption('#cancel-clean') &&
             !$buildSystem->cleanBuildSystem())
         {
             warning ("\tUnable to clean r[$self]!");
             return 0;
         }
     }
 
     if (!$buildSystem->createBuildSystem()) {
         error ("\tError creating r[$self]'s build system!");
         return 0;
     }
 
     # Now we're in the checkout directory
     # So, switch to the build dir.
     # builddir is automatically set to the right value for qt
     p_chdir ($self->fullpath('build'));
 
     if (!$buildSystem->configureInternal()) {
         error ("\tUnable to configure r[$self] with " . $self->buildSystemType());
 
         # Add undocumented ".refresh-me" file to build directory to flag
         # for --refresh-build for this module on next run. See also the
         # "needsRefreshed" subroutine.
         if (open my $fh, '>', '.refresh-me') {
             say $fh "# Build directory will be re-generated next kdesrc-build run";
             say $fh "# due to failing to complete configuration on the last run";
             close $fh;
         };
 
         return 0;
     }
 
     return 1;
 }
 
 # Responsible for installing the module (no update, build, etc.)
 # Return value: Boolean flag indicating whether module installed successfully or
 # not.
 # Exceptions may be thrown for abnormal conditions (e.g. no build dir exists)
 sub install
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $builddir = $self->fullpath('build');
     my $buildSysFile = $self->buildSystem()->configuredModuleFileName();
 
     if (!pretending() && ! -e "$builddir/$buildSysFile")
     {
         warning ("\tThe build system doesn't exist for r[$self].");
         warning ("\tTherefore, we can't install it. y[:-(].");
         return 0;
     }
 
     $self->setupEnvironment();
 
     my @makeInstallOpts = split(' ', $self->getOption('make-install-prefix'));
 
     # We can optionally uninstall prior to installing
     # to weed out old unused files.
     if ($self->getOption('use-clean-install') &&
         $self->getPersistentOption('last-install-rev'))
     {
         if (!$self->buildSystem()->uninstallInternal(@makeInstallOpts)) {
             warning ("\tUnable to uninstall r[$self] before installing the new build.");
             warning ("\tContinuing anyways...");
         }
         else {
             $self->unsetPersistentOption('last-install-rev');
         }
     }
 
     if (!$self->buildSystem()->installInternal(@makeInstallOpts))
     {
         error ("\tUnable to install r[$self]!");
         $self->buildContext()->markModulePhaseFailed('install', $self);
         return 0;
     }
 
     if (pretending())
     {
         pretend ("\tWould have installed g[$self]");
         return 1;
     }
 
     # Past this point we know we've successfully installed, for real.
 
     $self->setPersistentOption('last-install-rev', $self->currentScmRevision());
 
     my $remove_setting = $self->getOption('remove-after-install');
 
     # Possibly remove the srcdir and builddir after install for users with
     # a little bit of HD space.
     if($remove_setting eq 'all')
     {
         # Remove srcdir
         my $srcdir = $self->fullpath('source');
         note ("\tRemoving b[r[$self source].");
         safe_rmtree($srcdir);
     }
 
     if($remove_setting eq 'builddir' || $remove_setting eq 'all')
     {
         # Remove builddir
         note ("\tRemoving b[r[$self build directory].");
         safe_rmtree($builddir);
 
         # We're likely already in the builddir, so chdir back to the root
         p_chdir('/');
     }
 
     return 1;
 }
 
 # Handles uninstalling this module (or its sub-directories as given by the checkout-only
 # option).
 #
 # Returns boolean false on failure, boolean true otherwise.
 sub uninstall
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $builddir = $self->fullpath('build');
     my $buildSysFile = $self->buildSystem()->configuredModuleFileName();
 
     if (!pretending() && ! -e "$builddir/$buildSysFile")
     {
         warning ("\tThe build system doesn't exist for r[$self].");
         warning ("\tTherefore, we can't uninstall it.");
         return 0;
     }
 
     $self->setupEnvironment();
 
     my @makeInstallOpts = split(' ', $self->getOption('make-install-prefix'));
 
     if (!$self->buildSystem()->uninstallInternal(@makeInstallOpts))
     {
         error ("\tUnable to uninstall r[$self]!");
         $self->buildContext()->markModulePhaseFailed('install', $self);
         return 0;
     }
 
     if (pretending())
     {
         pretend ("\tWould have uninstalled g[$self]");
         return 1;
     }
 
     $self->unsetPersistentOption('last-install-rev');
     return 1;
 }
 
 sub buildContext
 {
     my $self = shift;
     return $self->{context};
 }
 
 # Integrates 'set-env' option to the build context environment
 sub applyUserEnvironment
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $ctx = $self->buildContext();
 
     # Let's see if the user has set env vars to be set.
     # Note the global set-env must be checked separately anyways, so
     # we limit inheritance when searching.
     my $env_hash_ref = $self->getOption('set-env', 'module');
 
     while (my ($key, $value) = each %{$env_hash_ref})
     {
         $ctx->queueEnvironmentVariable($key, $value);
     }
 }
 
 # Establishes proper build environment in the build context. Should be run
 # before forking off commands for e.g. updates, builds, installs, etc.
 sub setupEnvironment
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $ctx = $self->buildContext();
     my $kdedir = $self->getOption('kdedir');
     my $qtdir = $self->getOption('qtdir');
     my $prefix = $self->installationPath();
 
     # Add global set-envs and context
     $self->buildContext()->applyUserEnvironment();
 
     # Avoid moving /usr up in env vars
     if ($qtdir ne '/usr') {
         my @qt_pkg_config_dirs = ("$qtdir/lib/pkgconfig");
         $ctx->prependEnvironmentValue('PKG_CONFIG_PATH', @qt_pkg_config_dirs);
 
         my @qt_ld_dirs = ("$qtdir/lib");
         $ctx->prependEnvironmentValue('LD_LIBRARY_PATH', @qt_ld_dirs);
 
         my @qt_path = ("$qtdir/bin");
         $ctx->prependEnvironmentValue('PATH', @qt_path);
     }
 
     # Avoid moving /usr up in env vars
     if ($kdedir ne '/usr') {
         my @pkg_config_dirs = ("$kdedir/lib/pkgconfig");
         $ctx->prependEnvironmentValue('PKG_CONFIG_PATH', @pkg_config_dirs);
 
         my @ld_dirs = ("$kdedir/lib", $self->getOption('libpath'));
         $ctx->prependEnvironmentValue('LD_LIBRARY_PATH', @ld_dirs);
 
         my @path = ("$kdedir/bin", $self->getOption('binpath'));
         $ctx->prependEnvironmentValue('PATH', @path);
     }
 
     # Build system's environment injection
     my $buildSystem = $self->buildSystem();
     $buildSystem->prepareModuleBuildEnvironment($ctx, $self, $prefix);
 
     # Read in user environment defines
     $self->applyUserEnvironment() unless $self == $ctx;
 }
 
 # Returns the path to the log directory used during this run for this
 # ksb::Module, based on an autogenerated unique id. The id doesn't change
 # once generated within a single run of the script.
 sub getLogDir
 {
     my ($self) = @_;
     return $self->buildContext()->getLogDirFor($self);
 }
 
 # Returns a full path that can be open()'d to write a log
 # file, based on the given basename (with extension).
 # Updates the 'latest' symlink as well, unlike getLogDir
 # Use when you know you're going to create a new log
 sub getLogPath
 {
     my ($self, $path) = @_;
     return $self->buildContext()->getLogPathFor($self, $path);
 }
 
 sub toString
 {
     my $self = shift;
     return $self->name();
 }
 
 sub compare
 {
     my ($self, $other) = @_;
     return $self->name() cmp $other->name();
 }
 
 sub update
 {
     my ($self, $ipc, $ctx) = @_;
 
     my $moduleName = $self->name();
     my $module_src_dir = $self->getSourceDir();
     my $kdesrc = $ctx->getSourceDir();
 
     if ($kdesrc ne $module_src_dir)
     {
         # This module has a different source directory, ensure it exists.
         if (!super_mkdir($module_src_dir))
         {
             error ("Unable to create separate source directory for r[$self]: $module_src_dir");
             $ipc->sendIPCMessage(ksb::IPC::MODULE_FAILURE, $moduleName);
             next;
         }
     }
 
     my $fullpath = $self->fullpath('source');
     my $count;
     my $returnValue;
 
     eval { $count = $self->scm()->updateInternal($ipc) };
 
     if ($@)
     {
         my $reason = ksb::IPC::MODULE_FAILURE;
 
         if (had_an_exception()) {
             if ($@->{'exception_type'} eq 'ConflictPresent') {
                 $reason = ksb::IPC::MODULE_CONFLICT;
             }
             else {
                 $ctx->markModulePhaseFailed('build', $self);
             }
 
             $@ = $@->{'message'};
         }
 
         error ("Error updating r[$self], removing from list of packages to build.");
         error (" > y[$@]");
 
         $ipc->sendIPCMessage($reason, $moduleName);
         $self->phases()->filterOutPhase('build');
         $returnValue = 0;
     }
     else
     {
         my $message;
         if (not defined $count)
         {
             $message = ksb::Debug::colorize ("b[y[Unknown changes].");
             $ipc->notifyUpdateSuccess($moduleName, $message);
         }
         elsif ($count)
         {
             $message = "1 file affected." if $count == 1;
             $message = "$count files affected." if $count != 1;
             $ipc->notifyUpdateSuccess($moduleName, $message);
         }
         else
         {
             $message = "0 files affected.";
             my $refreshReason = $self->buildSystem()->needsRefreshed();
 
             $ipc->sendIPCMessage(ksb::IPC::MODULE_UPTODATE, "$moduleName,$refreshReason");
         }
 
         # We doing e.g. --src-only, the build phase that normally outputs
         # number of files updated doesn't get run, so manually mention it
         # here.
         if (!$ipc->supportsConcurrency()) {
             info ("\t$self update complete, $message");
         }
 
         $returnValue = 1;
     }
 
     info (""); # Print empty line.
     return $returnValue;
 }
 
 # OVERRIDE
 #
 # This calls OptionsBase::setOption and performs any Module-specific
 # handling.
 sub setOption
 {
     my ($self, %options) = @_;
 
     # Ensure we don't accidentally get fed module-set options
     for (qw(git-repository-base use-modules ignore-modules)) {
         if (exists $options{$_}) {
             error (" r[b[*] module b[$self] should be declared as module-set to use b[$_]");
             die ksb::BuildException::Config->new($_, "Option $_ can only be used in module-set");
         };
     }
 
     # Special case handling.
     if (exists $options{'filter-out-phases'}) {
         for my $phase (split(' ', $options{'filter-out-phases'})) {
             $self->phases()->filterOutPhase($phase);
         }
         delete $options{'filter-out-phases'};
     }
 
     $self->SUPER::setOption(%options);
 }
 
 # OVERRIDE
 #
 # This subroutine returns an option value for a given module.  Some globals
 # can't be overridden by a module's choice (but see 2nd parameter below).
 # If so, the module's choice will be ignored, and a warning will be issued.
 #
 # Option names are case-sensitive!
 #
 # Some options (e.g. cmake-options, configure-flags) have the global value
 # and then the module's own value appended together. To get the actual
 # module setting you must use the level limit parameter set to 'module'.
 #
 # Likewise, some qt module options do not obey the previous proviso since
 # Qt options are not likely to agree nicely with generic KDE buildsystem
 # options.
 #
 # 1st parameter: Name of option
 # 2nd parameter: Level limit (optional). If not present, then the value
 # 'allow-inherit' is used. Options:
 #   - allow-inherit: Module value is used if present (with exceptions),
 #     otherwise global is used.
 #   - module: Only module value is used (if you want only global then use the
 #     buildContext) NOTE: This overrides global "sticky" options as well!
 sub getOption
 {
     my ($self, $key, $levelLimit) = @_;
     my $ctx = $self->buildContext();
     $levelLimit //= 'allow-inherit';
 
     # Some global options would probably make no sense applied to Qt.
     my @qtCopyOverrides = qw(branch configure-flags tag cxxflags);
     if (list_has(\@qtCopyOverrides, $key) && $self->buildSystemType() eq 'Qt') {
         $levelLimit = 'module';
     }
 
     assert_in($levelLimit, [qw(allow-inherit module)]);
 
     # If module-only, check that first.
     return $self->{options}{$key} if $levelLimit eq 'module';
 
     my $ctxValue = $ctx->getOption($key); # we'll use this a lot from here
 
     # Some global options always override module options.
     return $ctxValue if $ctx->hasStickyOption($key);
 
     # Some options append to the global (e.g. conf flags)
     my @confFlags = qw(cmake-options configure-flags cxxflags);
     if (list_has(\@confFlags, $key) && $ctxValue) {
         return trimmed("$ctxValue " . ($self->{options}{$key} || ''));
     }
 
     # Everything else overrides the global option, unless it's simply not
     # set at all.
     return $self->{options}{$key} // $ctxValue;
 }
 
 # Gets persistent options set for this module. First parameter is the name
 # of the option to lookup. Undef is returned if the option is not set,
 # although even if the option is set, the value returned might be empty.
 # Note that ksb::BuildContext also has this function, with a slightly
 # different signature, which OVERRIDEs this function since Perl does not
 # have parameter-based method overloading.
 sub getPersistentOption
 {
     my ($self, $key) = @_;
     return $self->buildContext()->getPersistentOption($self->name(), $key);
 }
 
 # Sets a persistent option (i.e. survives between processes) for this module.
 # First parameter is the name of the persistent option.
 # Second parameter is its actual value.
 # See the warning for getPersistentOption above, it also applies for this
 # method vs. ksb::BuildContext::setPersistentOption
 sub setPersistentOption
 {
     my ($self, $key, $value) = @_;
     return $self->buildContext()->setPersistentOption($self->name(), $key, $value);
 }
 
 # Unsets a persistent option for this module.
 # Only parameter is the name of the option to unset.
 sub unsetPersistentOption
 {
     my ($self, $key) = @_;
     $self->buildContext()->unsetPersistentOption($self->name(), $key);
 }
 
 # Returns the path to the desired directory type (source or build),
 # including the module destination directory itself.
 sub fullpath
 {
     my ($self, $type) = @_;
     assert_in($type, [qw/build source/]);
 
     my %pathinfo = $self->getInstallPathComponents($type);
     return $pathinfo{'fullpath'};
 }
 
 # Returns the "full kde-projects path" for the module. As should be obvious by
 # the description, this only works for modules with an scm type that is a
 # Updater::KDEProject (or its subclasses), but modules that don't fall into this
 # hierarchy will just return the module name (with no path components) anyways.
 sub fullProjectPath
 {
     my $self = shift;
     return ($self->getOption('#xml-full-path', 'module') || $self->name());
 }
 
 # Returns true if this module is (or was derived from) a kde-projects module.
 sub isKDEProject
 {
     my $self = shift;
     return $self->hasOption('#xml-full-path');
 }
 
 # Subroutine to return the name of the destination directory for the
 # checkout and build routines.  Based on the dest-dir option.  The return
 # value will be relative to the src/build dir.  The user may use the
 # '$MODULE' or '${MODULE}' sequences, which will be replaced by the name of
 # the module in question.
 #
 # The first parameter is optional, but if provided will be used as the base
 # path to replace $MODULE entries in dest-dir.
 sub destDir
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $destDir = $self->getOption('dest-dir');
 
     my $basePath = "";
 
     if ($self->getOption('ignore-kde-structure')) {
         $basePath = $self->name();
     } else {
         $basePath = shift // $self->getOption('#xml-full-path');
         $basePath ||= $self->name(); # Default if not provided in repo-metadata
     }
 
     $destDir =~ s/(\$\{MODULE})|(\$MODULE\b)/$basePath/g;
 
     return $destDir;
 }
 
 # Subroutine to return the installation path of a given module (the value
 # that is passed to the CMAKE_INSTALL_PREFIX CMake option).
 # It is based on the "prefix" and, if it is not set, the "kdedir" option.
 # The user may use '$MODULE' or '${MODULE}' in the "prefix" option to have
 # them replaced by the name of the module in question.
 sub installationPath
 {
     my $self = assert_isa(shift, 'ksb::Module');
     my $path = $self->getOption('prefix');
 
     if (!$path)
     {
         return $self->getOption('kdedir');
     }
 
     my $moduleName = $self->name();
     $path =~ s/(\$\{MODULE})|(\$MODULE\b)/$moduleName/g;
 
     return $path;
 }
 
 1;