Cut erlang.mk into many small components

 *  The build.config says what gets into the generated erlang.mk.
 *  The default erlang.mk in the repository hasn't changed yet.
 *  Clean targets were separated into "clean" and "distclean".
 *  The "help" target was added to display some help message.

I probably broke a couple things...

1 files changed, 99 insertions, 0 deletions

diff --git a/core/deps.mk b/core/deps.mk
new file mode 100644
index 0000000..12bc90c
--- /dev/null
+++ b/core/deps.mk
@@ -0,0 +1,99 @@
+# Copyright (c) 2013-2014, Loïc Hoguin <[email protected]>
+# This file is part of erlang.mk and subject to the terms of the ISC License.
+
+.PHONY: distclean-deps distclean-pkg pkg-list pkg-search
+
+# Configuration.
+
+DEPS_DIR ?= $(CURDIR)/deps
+export DEPS_DIR
+
+REBAR_DEPS_DIR = $(DEPS_DIR)
+export REBAR_DEPS_DIR
+
+ALL_DEPS_DIRS = $(addprefix $(DEPS_DIR)/,$(DEPS))
+
+ifeq ($(filter $(DEPS_DIR),$(subst :, ,$(ERL_LIBS))),)
+ifeq ($(ERL_LIBS),)
+	ERL_LIBS = $(DEPS_DIR)
+else
+	ERL_LIBS := $(ERL_LIBS):$(DEPS_DIR)
+endif
+endif
+export ERL_LIBS
+
+PKG_FILE ?= $(CURDIR)/.erlang.mk.packages.v1
+export PKG_FILE
+
+PKG_FILE_URL ?= https://raw.github.com/extend/erlang.mk/master/packages.v1.tsv
+
+# Core targets.
+
+deps:: $(ALL_DEPS_DIRS)
+	@for dep in $(ALL_DEPS_DIRS) ; do \
+		if [ -f $$dep/Makefile ] ; then \
+			$(MAKE) -C $$dep ; \
+		else \
+			echo "include $(CURDIR)/erlang.mk" | $(MAKE) -f - -C $$dep ; \
+		fi ; \
+	done
+
+distclean:: distclean-deps distclean-pkg
+
+# Deps related targets.
+
+define dep_fetch
+	@mkdir -p $(DEPS_DIR)
+ifeq (,$(findstring pkg://,$(word 1,$(dep_$(1)))))
+	git clone -n -- $(word 1,$(dep_$(1))) $(DEPS_DIR)/$(1)
+else
+	@if [ ! -f $(PKG_FILE) ]; then $(call get_pkg_file); fi
+	git clone -n -- `awk 'BEGIN { FS = "\t" }; \
+		$$$$1 == "$(subst pkg://,,$(word 1,$(dep_$(1))))" { print $$$$2 }' \
+		$(PKG_FILE)` $(DEPS_DIR)/$(1)
+endif
+	cd $(DEPS_DIR)/$(1) ; git checkout -q $(word 2,$(dep_$(1)))
+endef
+
+define dep_target
+$(DEPS_DIR)/$(1):
+	$(call dep_fetch,$(1))
+endef
+
+$(foreach dep,$(DEPS),$(eval $(call dep_target,$(dep))))
+
+distclean-deps:
+	$(gen_verbose) rm -rf $(DEPS_DIR)
+
+# Packages related targets.
+
+$(PKG_FILE):
+	$(call core_http_get,$(PKG_FILE),$(PKG_FILE_URL))
+
+pkg-list: $(PKG_FILE)
+	@cat $(PKG_FILE) | awk 'BEGIN { FS = "\t" }; { print \
+		"Name:\t\t" $$1 "\n" \
+		"Repository:\t" $$2 "\n" \
+		"Website:\t" $$3 "\n" \
+		"Description:\t" $$4 "\n" }'
+
+ifdef q
+pkg-search: $(PKG_FILE)
+	@cat $(PKG_FILE) | grep -i ${q} | awk 'BEGIN { FS = "\t" }; { print \
+		"Name:\t\t" $$1 "\n" \
+		"Repository:\t" $$2 "\n" \
+		"Website:\t" $$3 "\n" \
+		"Description:\t" $$4 "\n" }'
+else
+pkg-search:
+	@echo "Usage: make pkg-search q=STRING"
+endif
+
+distclean-pkg:
+	$(gen_verbose) rm -f $(PKG_FILE)
+
+help::
+	@printf "%s\n" "" \
+		"Package-related targets:" \
+		"  pkg-list              List all known packages" \
+		"  pkg-search q=STRING   Search for STRING in the package index"