From 49cfbe9870cf5e5fd75386869b09c5ab463c39ed Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Bernon?= <rbernon@codeweavers.com>
Date: Wed, 11 Mar 2020 17:47:54 +0100
Subject: [PATCH] build: Introduce rules-source macro.

---
 build/makefile_base.mak |  9 ++++---
 make/rules-source.mk    | 56 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 make/rules-source.mk

diff --git a/build/makefile_base.mak b/build/makefile_base.mak
index 271dfd06..a0cc30a4 100644
--- a/build/makefile_base.mak
+++ b/build/makefile_base.mak
@@ -36,6 +36,7 @@ ifeq ($(SRCDIR),)
 endif
 
 include $(SRC)/make/utility.mk
+include $(SRC)/make/rules-source.mk
 
 # If CC is coming from make's defaults or nowhere, use our own default.  Otherwise respect environment.
 ifeq ($(ENABLE_CCACHE),1)
@@ -489,12 +490,12 @@ redist: dist | $(filter-out dist deploy install redist,$(MAKECMDGOALS))
 
 .PHONY: module32 module64 module
 
-module32: SHELL = $(CONTAINER_SHELL)
-module32:
+module32: private SHELL := $(CONTAINER_SHELL)
+module32: all-source
 	+$(MAKE) -C $(WINE_OBJ32)/dlls/$(module)
 
-module64: SHELL = $(CONTAINER_SHELL)
-module64:
+module64: private SHELL := $(CONTAINER_SHELL)
+module64: all-source
 	+$(MAKE) -C $(WINE_OBJ64)/dlls/$(module)
 
 module: module32 module64
diff --git a/make/rules-source.mk b/make/rules-source.mk
new file mode 100644
index 00000000..e84f8855
--- /dev/null
+++ b/make/rules-source.mk
@@ -0,0 +1,56 @@
+# parameters:
+#   $(1): lowercase package name
+#   $(2): uppercase package name
+#   $(3): source directory
+#
+# inputs:
+#   $(PKG): variable, package source folder
+#
+# outputs:
+#   $($(2)_SRC): variable, absolute rsynced source folder
+#   $(1)-rebuild: target, call it to force package rebuild
+#   $(1)-source: target, tracking package source changes
+#   $(1)-clean: target, clean package and force rebuild
+#
+define create-rules-source
+$(2)_SRC = $$(OBJ)/src-$(1)
+
+ifeq ($(CONTAINER),)
+$(1)-rebuild:
+.PHONY: $(1)-rebuild
+
+$$(OBJ)/.$(1)-source: SHELL := $$(SHELL)
+$$(OBJ)/.$(1)-source: $$(if $$(NO_MAKEFILE_DEPENDENCY),,$$(MAKEFILE_LIST))
+$$(OBJ)/.$(1)-source: $$(shell echo -n 'syncing $(1)... ' >&2 && \
+                              rsync --dry-run --filter=:C --exclude '*~' --exclude .git $$($(2)_SOURCE_ARGS) --info=name -Oarx --delete "$$(abspath $(3))/" "$$($(2)_SRC)" | \
+                              grep -v -e ^$$$$ | grep -q ^ && echo $(1)-rebuild && \
+                              echo 'done, dirty' >&2 || echo 'done' >&2)
+	rsync --filter=:C --exclude '*~' --exclude .git $$($(2)_SOURCE_ARGS) --info=name -Oarx --delete "$$(abspath $(3))/" "$$($(2)_SRC)"
+	touch $$@
+
+$$(OBJ)/.$(1)-post-source: $$(OBJ)/.$(1)-source
+container-build: $$(OBJ)/.$(1)-post-source
+
+$(1)-source: $$(OBJ)/.$(1)-post-source
+.PHONY: $(1)-source
+
+all-source: $(1)-source
+.PHONY: all-source
+
+all: all-source
+.PHONY: all
+
+$(1)-clean::
+$(1)-distclean::
+	rm -rf $$($(2)_SRC)
+
+clean: $(1)-clean
+distclean: $(1)-distclean
+.PHONY: clean distclean
+endif
+endef
+
+rules-source = $(call create-rules-source,$(1),$(call toupper,$(1)),$(2))
+
+$(OBJ)/.%-post-source:
+	touch $@