# Multiple directories can be given so long as files with the same name do not exist in each.
#
# These can be inside of `SRCDIR´ directories if desired.
-INCLUDEDIR := $(SRCDIR)/includes
+INCLUDEDIR := $(foreach dir,$(SRCDIR),$(dir)/includes)
# The directory in which to generate temporary buildfiles.
#
# ☡ This variable creates a subshell every time it is computed.
override pathenc = $(subst %2F,/,$(call perenc,$1))
+# (callable) Create a unique name for the given file, based on its absolute path.
+#
+# ☡ This variable creates a subshell every time it is computed.
+namehash = $(shell $(PRINTF) '%s' $(call quote,$(abspath $1)) | $(CKSUM) | $(SED) 's/ .*//' | $(XARGS) -E '' $(PRINTF) '%X')-$(notdir $1)
+
# (overridable) Collect all of the applicable includes from the includes directory.
sourceincludes := $(if $(and $(INCLUDEDIR),$(wildcard $(INCLUDEDIR))),$(patsubst ./%,%,$(shell $(FIND) $(foreach dir,$(INCLUDEDIR),$(call quote,$(dir))) '(' $(FINDINCLUDERULES) ')' -a -type f -a -print)),)
override typeoffile = $(foreach file,$1,$(or $(patsubst $(file)|%,%,$(filter $(file)|%,$(types))),$(error Unable to get type of file `$(file)´)))
# Pair each source magic file with its location in the build directory.
-override magicpair := $(foreach magicfile,$(MAGIC),$(magicfile)|$(BUILDDIR)/magic/$(notdir $(magicfile)))
+override magicpair := $(foreach magicfile,$(MAGIC),$(magicfile)|$(BUILDDIR)/magic/$(call namehash,$(magicfile)))
# (callable) Get the source file for the given magic files.
override magicsource = $(foreach magicpath,$1,$(patsubst %|$(magicpath),%,$(firstword $(filter %|$(magicpath),$(magicpair)))))
ifneq ($(wildcard $(BUILDDIR)/dependencies),)
# Pair each file with a list of dependencies for it.
-override dependenciesforfile := $(foreach file,$(filter-out $(assetfiles),$(sourcefiles) $(sourceincludes)),$(file)|$(subst $(space),|,$(shell $(CAT) $(call quote,$(BUILDDIR)/dependencies) | $(SED) $(call quote,/^$(call sedesc,$(call localuri,$(file)))$$/$(comma)/^[^ ]/!d;/^ /!d;s/^ //))))
+override dependenciesforfile := $(foreach file,$(filter-out $(assetfiles),$(sourcefiles) $(sourceincludes)),$(file)|$(subst $(space),|,$(shell $(SED) $(call quote,/^$(call sedesc,$(call localuri,$(file)))$$/$(comma)/^[^ ]/!d;/^ /!d;s/^ //) <$(call quote,$(BUILDDIR)/dependencies))))
# (callable) Get the list of dependency leiris for the given source files.
#