Don't fetch submodules for plugins that aren't being built

cmake/modules/CheckSubmodules.cmake

@@ -27,7 +27,7 @@ SET(DEPTH_VALUE 100)
 # Number of times git commands will retry before failing
 SET(MAX_ATTEMPTS 2)
 
-MESSAGE("\nValidating submodules...")
+MESSAGE("\nChecking submodules...")
 IF(NOT EXISTS "${CMAKE_SOURCE_DIR}/.gitmodules")
 	MESSAGE("Skipping the check because .gitmodules not detected."
 		"Please make sure you have all submodules in the source tree!"
@@ -46,6 +46,7 @@ SET(ENV{LANG} "en_US")
 STRING(REGEX MATCHALL "path = [-0-9A-Za-z/]+" SUBMODULE_LIST ${SUBMODULE_DATA})
 STRING(REGEX MATCHALL "url = [.:%-0-9A-Za-z/]+" SUBMODULE_URL_LIST ${SUBMODULE_DATA})
 
+SET(SKIP_COUNT 0)
 FOREACH(_part ${SUBMODULE_LIST})
 	STRING(REPLACE "path = " "" SUBMODULE_PATH ${_part})
 
@@ -59,6 +60,9 @@ FOREACH(_part ${SUBMODULE_LIST})
 	IF(${SUBMODULE_PATH} MATCHES "^plugins/")
 		SET(REMOVE_PLUGIN true)
 		FOREACH(_plugin ${PLUGIN_LIST})
+			IF(_plugin STREQUAL "")
+				CONTINUE()
+			ENDIF()
 			IF(${SUBMODULE_PATH} MATCHES "${_plugin}")
 				SET(REMOVE_PLUGIN false)
 			ENDIF()
@@ -76,6 +80,8 @@ FOREACH(_part ${SUBMODULE_LIST})
 			IF(${SUBMODULE_PATH} MATCHES ${_skip})
 				MESSAGE("-- Skipping ${SUBMODULE_PATH} matches \"${_skip}\" ${SKIP_REASON}")
 				SET(SKIP true)
+				MATH(EXPR SKIP_COUNT "${SKIP_COUNT}+1")
+				BREAK()
 			ENDIF()
 		ENDFOREACH()
 	ENDIF()
@@ -87,6 +93,33 @@ FOREACH(_part ${SUBMODULE_LIST})
 	LIST(REMOVE_ITEM SUBMODULE_URL_LIST ${_url})
 ENDFOREACH()
 
+# Count provided values
+SET(SKIP_SUBMODULES_LENGTH 0)
+FOREACH(_skip ${SKIP_SUBMODULES})
+	MATH(EXPR SKIP_SUBMODULES_LENGTH "${SKIP_SUBMODULES_LENGTH}+1")
+ENDFOREACH()
+
+# Abort if skip count differs from provided values
+IF(NOT SKIP_SUBMODULES_LENGTH EQUAL SKIP_COUNT)
+	SET(FATAL_MSG "One or more submodule(s) \"${SKIP_SUBMODULES}\" was not found, aborting.\
+\nFor a list of supported values try -DLIST_SUBMODULES=True\n")
+	UNSET(SKIP_SUBMODULES CACHE)
+	MESSAGE(FATAL_ERROR "${FATAL_MSG}")
+ENDIF()
+
+IF(LIST_SUBMODULES)
+	UNSET(LIST_SUBMODULES CACHE)
+	MESSAGE("\nAll possible -DSKIP_SUBMODULES values")
+	FOREACH(item IN LISTS SUBMODULE_LIST)
+		MESSAGE("   ${item}")
+	ENDFOREACH()
+	MESSAGE(
+		"\n"
+		"NOTE: A simple and more effective way to skip submodules is via -DPLUGIN_LIST.\n\n"
+		"See also -DLIST_PLUGINS=True for a complete list.\n"
+	)
+	MESSAGE(FATAL_ERROR "Information was requested, aborting build!")
+ENDIF()
 
 # Once called, status is stored in GIT_RESULT respectively.
 # Note: Git likes to write to stderr.  Don't assume stderr is error; Check GIT_RESULT instead.

cmake/modules/PluginList.cmake

@@ -20,56 +20,77 @@ IF(LMMS_MINIMAL)
 	SET(PLUGIN_LIST ${MINIMAL_LIST} ${PLUGIN_LIST})
 ENDIF()
 
+SET(LMMS_PLUGIN_LIST
+	${MINIMAL_LIST}
+	Amplifier
+	BassBooster
+	bit_invader
+	Bitcrush
+	carlabase
+	carlapatchbay
+	carlarack
+	CrossoverEQ
+	Delay
+	DualFilter
+	dynamics_processor
+	Eq
+	Flanger
+	HydrogenImport
+	ladspa_browser
+	LadspaEffect
+	lb302
+	MidiImport
+	MidiExport
+	MultitapEcho
+	monstro
+	nes
+	OpulenZ
+	organic
+	FreeBoy
+	patman
+	peak_controller_effect
+	GigPlayer
+	ReverbSC
+	sf2_player
+	sfxr
+	sid
+	SpectrumAnalyzer
+	stereo_enhancer
+	stereo_matrix
+	stk
+	vst_base
+	vestige
+	VstEffect
+	watsyn
+	waveshaper
+	vibed
+	Xpressive
+	zynaddsubfx
+)
+
 IF("${PLUGIN_LIST}" STREQUAL "")
-	SET(PLUGIN_LIST
-		${MINIMAL_LIST}
-		Amplifier
-		BassBooster
-		bit_invader
-		Bitcrush
-		carlabase
-		carlapatchbay
-		carlarack
-		CrossoverEQ
-		Delay
-		DualFilter
-		dynamics_processor
-		Eq
-		Flanger
-		HydrogenImport
-		ladspa_browser
-		LadspaEffect
-		lb302
-		MidiImport
-		MidiExport
-		MultitapEcho
-		monstro
-		nes
-		OpulenZ
-		organic
-		FreeBoy
-		patman
-		peak_controller_effect
-		GigPlayer
-		ReverbSC
-		sf2_player
-		sfxr
-		sid
-		SpectrumAnalyzer
-		stereo_enhancer
-		stereo_matrix
-		stk
-		vst_base
-		vestige
-		VstEffect
-		watsyn
-		waveshaper
-		vibed
-		Xpressive
-		zynaddsubfx
-	)
+	SET(PLUGIN_LIST ${LMMS_PLUGIN_LIST})
+ENDIF()
 
-ENDIF("${PLUGIN_LIST}" STREQUAL "")
+MACRO(LIST_ALL_PLUGINS)
+	MESSAGE("\n\nAll possible -DPLUGIN_LIST values")
+	MESSAGE("\n   KEYWORD:")
+	MESSAGE("      LMMS_MINIMAL")
+	FOREACH(item IN LISTS MINIMAL_LIST)
+		MESSAGE("         ${item}")
+	ENDFOREACH()
+	MESSAGE("\n   NAME:")
+	FOREACH(item IN LISTS LMMS_PLUGIN_LIST)
+		MESSAGE("      ${item}")
+	ENDFOREACH()
+	MESSAGE("\nNote:  This value also impacts the fetching of git submodules.\n")
+	MESSAGE(FATAL_ERROR "Information was requested, aborting build!")
+ENDMACRO()
+
+IF(LIST_PLUGINS)
+	UNSET(LIST_PLUGINS CACHE)
+	LIST_ALL_PLUGINS()
+ENDIF()
 
 IF(MSVC)
 	SET(MSVC_INCOMPATIBLE_PLUGINS