Point CMake to Qt's cmake module directory if different from KF5's

I still need to fix kdesrc-build-setup though. :(

CCBUG:368070

modules/ksb/BuildSystem.pm

@@ -1,4 +1,4 @@
-package ksb::BuildSystem;
+package ksb::BuildSystem 0.30;
 
 # Base module for the various build systems, includes built-in implementations of
 # generic functions and supports hooks for subclasses to provide needed detailed
@@ -8,8 +8,6 @@ use strict;
 use warnings;
 use 5.014;
 
-our $VERSION = '0.20';
-
 use ksb::Debug;
 use ksb::Util;
 use ksb::StatusView;
@@ -101,14 +99,12 @@ sub isProgressOutputSupported
     return 0;
 }
 
-# If this method returns a non-empty string, then that string is the name
-# of an environment variable to prepend the module's installation prefix
-# path to. Mostly a hack, but will have to do until there's a better scheme
-# for giving integration points for build systems into the actual build
-# process.
-sub prefixEnvironmentVariable
+# Called by the module being built before it runs its build/install process. Should
+# setup any needed environment variables, build context settings, etc., in preparation
+# for the build and install phases.
+sub prepareModuleBuildEnvironment
 {
-    return undef;
+    my ($self, $ctx, $module, $prefix) = @_;
 }
 
 # Returns true if the module should have make install run in order to be

modules/ksb/BuildSystem/KDE4.pm

@@ -1,4 +1,4 @@
-package ksb::BuildSystem::KDE4;
+package ksb::BuildSystem::KDE4 0.20;
 
 # Class responsible for building KDE4 CMake-based modules.
 
@@ -6,11 +6,10 @@ use strict;
 use warnings;
 use 5.014;
 
-our $VERSION = '0.10';
-
 use ksb::Debug;
 use ksb::Util;
-use ksb::BuildSystem;
+use ksb::BuildContext 0.30;
+use ksb::BuildSystem 0.30;
 
 our @ISA = ('ksb::BuildSystem');
 
@@ -32,9 +31,21 @@ sub isProgressOutputSupported
     return 1;
 }
 
-sub prefixEnvironmentVariable
+# Called by the module being built before it runs its build/install process. Should
+# setup any needed environment variables, build context settings, etc., in preparation
+# for the build and install phases.
+sub prepareModuleBuildEnvironment
 {
-    return 'CMAKE_PREFIX_PATH';
+    my ($self, $ctx, $module, $prefix) = @_;
+
+    $ctx->prependEnvironmentValue('CMAKE_PREFIX_PATH', $prefix);
+    $ctx->prependEnvironmentValue('XDG_DATA_DIRS', "$prefix/share");
+
+    my $qtdir = $module->getOption('qtdir');
+    if ($qtdir && $qtdir ne $prefix) {
+        # Ensure we can find Qt5's own CMake modules
+        $ctx->prependEnvironmentValue('CMAKE_MODULE_PATH', "$qtdir/lib/cmake");
+    }
 }
 
 sub requiredPrograms

modules/ksb/Module.pm

@@ -26,7 +26,7 @@ use ksb::Updater::KDEProjectMetadata;
 
 use ksb::BuildException 0.20;
 
-use ksb::BuildSystem;
+use ksb::BuildSystem 0.30;
 use ksb::BuildSystem::Autotools;
 use ksb::BuildSystem::QMake;
 use ksb::BuildSystem::Qt4;
@@ -661,17 +661,10 @@ sub setupEnvironment
     my @ld_dirs = ("$kdedir/lib", "$qtdir/lib", $self->getOption('libpath'));
     $ctx->prependEnvironmentValue('LD_LIBRARY_PATH', @ld_dirs);
 
-    # Needed to find installed resources for KF5.
-    # TODO: Make this an integration point for the BuildSystem interface.
-    $ctx->prependEnvironmentValue('XDG_DATA_DIRS', "$kdedir/share");
+    my $buildSystem = $self->buildSystem();
+    $buildSystem->prepareModuleBuildEnvironment($ctx, $self, $prefix);
 
     my @path = ("$kdedir/bin", "$qtdir/bin", $self->getOption('binpath'));
-
-    if (my $prefixEnvVar = $self->buildSystem()->prefixEnvironmentVariable())
-    {
-        $ctx->prependEnvironmentValue($prefixEnvVar, $prefix);
-    }
-
     $ctx->prependEnvironmentValue('PATH', @path);
 
     # Set up the children's environment.  We use queueEnvironmentVariable since
@@ -680,23 +673,8 @@ sub setupEnvironment
 
     $ctx->queueEnvironmentVariable('QTDIR', $qtdir);
 
-    # If the module isn't kdelibs, also append kdelibs's KDEDIR setting.
-    if ($self->name() ne 'kdelibs')
-    {
-        my $kdelibsModule = $ctx->lookupModule('kdelibs');
-        my $kdelibsDir;
-        $kdelibsDir = $kdelibsModule->installationPath() if $kdelibsModule;
-
-        if ($kdelibsDir && $kdelibsDir ne $kdedir) {
-            whisper ("Module $self uses different KDEDIR than kdelibs, including kdelibs as well.");
-            $kdedir .= ":$kdelibsDir"
-        }
-    }
-
-    $ctx->queueEnvironmentVariable('KDEDIRS', $kdedir);
-
     # Read in user environment defines
-    $self->applyUserEnvironment() unless $self->name() eq 'global';
+    $self->applyUserEnvironment() unless $self == $ctx;
 }
 
 # Returns the path to the log directory used during this run for this

modules/ksb/l10nSystem.pm

@@ -58,9 +58,11 @@ sub isSubdirBuildable
     return ($subdir ne 'scripts' && $subdir ne 'templates');
 }
 
-sub prefixEnvironmentVariable
+sub prepareModuleBuildEnvironment
 {
-    return 'CMAKE_PREFIX_PATH';
+    my ($ctx, $module, $prefix) = @_;
+
+    $ctx->prependEnvironmentValue('CMAKE_PREFIX_PATH', $prefix);
 }
 
 # scm-specific update procedure.