Add ezs make target that builds .ez files for all deps & plugin

The resulting files will be placed in ./tmp, e.g.

    ls -l tmp/
    total 992
    -rw-r--r--  1 gerhard  staff   12548 20 Feb 18:02 accept-0.3.4.ez
    -rw-r--r--  1 gerhard  staff  211232 20 Feb 18:02 prometheus-4.2.2.ez
    -rw-r--r--  1 gerhard  staff   14053 20 Feb 18:02 prometheus_cowboy-0.1.7.ez
    -rw-r--r--  1 gerhard  staff   21638 20 Feb 18:02 prometheus_httpd-2.1.10.ez
    -rw-r--r--  1 gerhard  staff   10708 20 Feb 18:02 prometheus_process_collector-1.4.0.ez
    -rw-r--r--  1 gerhard  staff  223943 20 Feb 18:02 prometheus_rabbitmq_exporter-3.7.20190220.ez

I've changed the version of this plugin to use the date for the patch
part, feel free to change back if you disagree.

Notice that I've deleted the prometheus_rabbitmq_exporter.app.src, this
is now generated by erlang.mk and dropped in
ebin/prometheus_rabbitmq_exporter.app - does it look correct
@deadtrickster?

Want to integrate with Docker & testing before merging.

This started as #63, see the
discussion for more context.

.gitignore

@@ -12,6 +12,7 @@
 /ebin/
 /logs/
 /plugins/
-
+_build
 /rabbitmq_management_metrics.d
 erl_crash.dump
+*.ez

Makefile

@@ -1,13 +1,35 @@
 PROJECT = prometheus_rabbitmq_exporter
+PROJECT_DESCRIPTION = RabbitMQ Prometheus.io metrics exporter
+# PROJECT_VERSION gets set in rabbitmq-components.mk to RABBITMQ_VERSION
+RABBITMQ_VERSION = 3.7.$(shell date +'%Y%m%d')
+EZ = $(PROJECT)-$(PROJECT_VERSION)
+PROJECT_APP_EXTRA_KEYS = {maintainers, ["Ilya Khaprov"]}, \
+  {licenses, ["MIT"]}, \
+  {links, [{"Github", "https://github.com/deadtrickster/prometheus_rabbitmq_exporter"}]}
 
-dep_prometheus = hex 3.5.1
-dep_prometheus_process_collector = hex 1.3.1
-dep_prometheus_httpd = hex 2.1.8
-dep_accept = hex 0.3.3
-dep_prometheus_cowboy = hex 0.1.4
+ACCEPT_VERSION = 0.3.4
+dep_accept = hex $(ACCEPT_VERSION)
+# dep_accept = git https://github.com/rabbitmq/accept rebar-archive
 
-DEPS = rabbit_common rabbit rabbitmq_management prometheus prometheus_httpd accept \
-	prometheus_process_collector prometheus_cowboy
+PROMETHEUS_VERSION = 4.2.2
+dep_prometheus = hex $(PROMETHEUS_VERSION)
+
+PROMETHEUS_COWBOY_VERSION = 0.1.7
+dep_prometheus_cowboy = hex $(PROMETHEUS_COWBOY_VERSION)
+# dep_prometheus_cowboy = git https://github.com/rabbitmq/prometheus-cowboy rebar-archive
+
+PROMETHEUS_HTTPD_VERSION = 2.1.10
+dep_prometheus_httpd = hex $(PROMETHEUS_HTTPD_VERSION)
+# dep_prometheus_httpd = git https://github.com/rabbitmq/prometheus-httpd rebar-archive
+
+PROMETHEUS_PROCESS_COLLECTOR_VERSION = 1.4.0
+dep_prometheus_process_collector = hex $(PROMETHEUS_PROCESS_COLLECTOR_VERSION)
+
+DEPS = rabbit rabbitmq_management  \
+       prometheus prometheus_cowboy prometheus_httpd
+
+# We do not want these deps defined as applications in app
+BUILD_DEPS = rabbit_common rabbitmq_management_agent accept prometheus_process_collector
 
 DEP_EARLY_PLUGINS = rabbit_common/mk/rabbitmq-early-plugin.mk
 DEP_PLUGINS = rabbit_common/mk/rabbitmq-plugin.mk
@@ -18,10 +40,15 @@ DEP_PLUGINS = rabbit_common/mk/rabbitmq-plugin.mk
 ERLANG_MK_REPO = https://github.com/rabbitmq/erlang.mk.git
 ERLANG_MK_COMMIT = rabbitmq-tmp
 
+RABBITMQ_BRANCH ?= v3.7.x
+RABBITMQ_CURRENT_FETCH_URL ?= https://github.com/rabbitmq/
+
+REBAR := $(CURDIR)/rebar3
+
 include rabbitmq-components.mk
 include erlang.mk
 
-.PHONY: docker_build docker_push docker_latest docker_pure docker_alpine
+.PHONY: up docker_build docker_push docker_latest docker_pure docker_alpine
 
 docker_build:
 	docker build -t deadtrickster/rabbitmq_prometheus\:3.7.8 .
@@ -47,3 +74,74 @@ docker_pure:
 
 docker_alpine:
 	-docker run -p15672\:15672 deadtrickster/rabbitmq_prometheus\:latest-alpine
+
+.PHONY: up
+up: $(abspath .)+up $(DEPS:%=$(DEPS_DIR)/%+up) $(BUILD_DEPS:%=$(DEPS_DIR)/%+up)
+	@:
+
+%+up: fetch-deps
+	$(exec_verbose) cd $*; \
+	git fetch -p && \
+	if [ '$(RABBITMQ_BRANCH)' ]; then \
+		git checkout $(RABBITMQ_BRANCH) || : ; \
+	fi && \
+	if git symbolic-ref -q HEAD >/dev/null; then \
+		branch=$$(git symbolic-ref --short HEAD); \
+		remote=$$(git config branch.$$branch.remote); \
+		merge=$$(git config branch.$$branch.merge | sed 's,refs/heads/,,'); \
+		if [ "$$remote" -a "$$merge" ]; then \
+			git merge --ff-only "$$remote/$$merge"; \
+		fi; \
+	fi && \
+	echo
+
+REBAR_DEPS_DIR := _build/default/lib
+$(REBAR_DEPS_DIR): up
+	@mkdir -p _build/default && \
+	ln -shfv $(CURDIR)/deps $(REBAR_DEPS_DIR)
+
+tmp:
+	@mkdir -p tmp
+
+tmp/accept-$(ACCEPT_VERSION).ez: $(REBAR_DEPS_DIR) tmp
+	@cd $(REBAR_DEPS_DIR)/accept && \
+	$(REBAR) archive && \
+	mv accept-$(ACCEPT_VERSION).ez $(CURDIR)/tmp/
+
+tmp/prometheus-$(PROMETHEUS_VERSION).ez: $(REBAR_DEPS_DIR) tmp
+	@cd $(REBAR_DEPS_DIR)/prometheus && \
+	$(REBAR) archive && \
+	mv prometheus-$(PROMETHEUS_VERSION).ez $(CURDIR)/tmp/
+
+tmp/prometheus_cowboy-$(PROMETHEUS_COWBOY_VERSION).ez: $(REBAR_DEPS_DIR) tmp
+	@cd $(REBAR_DEPS_DIR)/prometheus_cowboy && \
+	$(REBAR) archive && \
+	mv prometheus_cowboy-$(PROMETHEUS_COWBOY_VERSION).ez $(CURDIR)/tmp/
+
+tmp/prometheus_httpd-$(PROMETHEUS_HTTPD_VERSION).ez: $(REBAR_DEPS_DIR) tmp
+	@cd $(REBAR_DEPS_DIR)/prometheus_httpd && \
+	$(REBAR) archive && \
+	mv prometheus_httpd-$(PROMETHEUS_HTTPD_VERSION).ez $(CURDIR)/tmp/
+
+tmp/prometheus_process_collector-$(PROMETHEUS_PROCESS_COLLECTOR_VERSION).ez: $(REBAR_DEPS_DIR) tmp
+	@cd $(REBAR_DEPS_DIR)/prometheus_process_collector && \
+	$(REBAR) archive && \
+	mv prometheus_process_collector-$(PROMETHEUS_PROCESS_COLLECTOR_VERSION).ez $(CURDIR)/tmp
+
+tmp/$(EZ).ez: up app tmp
+	@rm -fr $(EZ) && mkdir $(EZ) && \
+	cp -r ebin include priv $(EZ) && \
+	rm -f $(EZ).ez && \
+	zip --move --recurse-paths --test $(EZ).ez $(EZ) && \
+	mv $(EZ).ez tmp/
+
+# $(EZ).ez: _build/default/lib app
+# 	$(REBAR) archive
+
+.PHONY: ezs
+ezs:: tmp/accept-$(ACCEPT_VERSION).ez
+ezs:: tmp/prometheus-$(PROMETHEUS_VERSION).ez
+ezs:: tmp/prometheus_cowboy-$(PROMETHEUS_COWBOY_VERSION).ez
+ezs:: tmp/prometheus_httpd-$(PROMETHEUS_HTTPD_VERSION).ez
+ezs:: tmp/prometheus_process_collector-$(PROMETHEUS_PROCESS_COLLECTOR_VERSION).ez
+ezs:: tmp/$(EZ).ez

rabbitmq-components.mk

@@ -40,7 +40,6 @@ endif
 dep_amqp_client                       = git_rmq rabbitmq-erlang-client $(current_rmq_ref) $(base_rmq_ref) master
 dep_amqp10_client                     = git_rmq rabbitmq-amqp1.0-client $(current_rmq_ref) $(base_rmq_ref) master
 dep_amqp10_common                     = git_rmq rabbitmq-amqp1.0-common $(current_rmq_ref) $(base_rmq_ref) master
-dep_ra                                = git_rmq ra $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbit                            = git_rmq rabbitmq-server $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbit_common                     = git_rmq rabbitmq-common $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_amqp1_0                  = git_rmq rabbitmq-amqp1.0 $(current_rmq_ref) $(base_rmq_ref) master
@@ -51,7 +50,6 @@ dep_rabbitmq_auth_backend_ldap        = git_rmq rabbitmq-auth-backend-ldap $(cur
 dep_rabbitmq_auth_mechanism_ssl       = git_rmq rabbitmq-auth-mechanism-ssl $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_aws                      = git_rmq rabbitmq-aws $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_boot_steps_visualiser    = git_rmq rabbitmq-boot-steps-visualiser $(current_rmq_ref) $(base_rmq_ref) master
-dep_rabbitmq_clusterer                = git_rmq rabbitmq-clusterer $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_cli                      = git_rmq rabbitmq-cli $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_codegen                  = git_rmq rabbitmq-codegen $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_consistent_hash_exchange = git_rmq rabbitmq-consistent-hash-exchange $(current_rmq_ref) $(base_rmq_ref) master
@@ -71,7 +69,6 @@ dep_rabbitmq_management               = git_rmq rabbitmq-management $(current_rm
 dep_rabbitmq_management_agent         = git_rmq rabbitmq-management-agent $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_management_exchange      = git_rmq rabbitmq-management-exchange $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_management_themes        = git_rmq rabbitmq-management-themes $(current_rmq_ref) $(base_rmq_ref) master
-dep_rabbitmq_management_visualiser    = git_rmq rabbitmq-management-visualiser $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_message_timestamp        = git_rmq rabbitmq-message-timestamp $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_metronome                = git_rmq rabbitmq-metronome $(current_rmq_ref) $(base_rmq_ref) master
 dep_rabbitmq_mqtt                     = git_rmq rabbitmq-mqtt $(current_rmq_ref) $(base_rmq_ref) master
@@ -111,20 +108,18 @@ dep_rabbitmq_public_umbrella          = git_rmq rabbitmq-public-umbrella $(curre
 # all projects use the same versions. It avoids conflicts and makes it
 # possible to work with rabbitmq-public-umbrella.
 
-dep_cowboy = hex 2.2.2
-dep_cowlib = hex 2.1.0
-dep_jsx = hex 2.8.2
-dep_lager = hex 3.6.3
-dep_ranch = hex 1.5.0
-dep_ranch_proxy_protocol = hex 1.5.0
-dep_recon = hex 2.3.2
-
-dep_sockjs = git https://github.com/rabbitmq/sockjs-erlang.git 405990ea62353d98d36dbf5e1e64942d9b0a1daf
+dep_cowboy = hex 2.6.1
+dep_cowlib = hex 2.7.0
+dep_jsx = hex 2.9.0
+dep_lager = hex 3.6.5
+dep_ra = git https://github.com/rabbitmq/ra.git master
+dep_ranch = hex 1.7.1
+dep_recon = hex 2.3.6
+dep_sysmon_handler = hex 1.1.0
 
 RABBITMQ_COMPONENTS = amqp_client \
 		      amqp10_common \
 		      amqp10_client \
-		      ra \
 		      rabbit \
 		      rabbit_common \
 		      rabbitmq_amqp1_0 \
@@ -135,7 +130,6 @@ RABBITMQ_COMPONENTS = amqp_client \
 		      rabbitmq_auth_mechanism_ssl \
 		      rabbitmq_aws \
 		      rabbitmq_boot_steps_visualiser \
-		      rabbitmq_clusterer \
 		      rabbitmq_cli \
 		      rabbitmq_codegen \
 		      rabbitmq_consistent_hash_exchange \
@@ -155,7 +149,6 @@ RABBITMQ_COMPONENTS = amqp_client \
 		      rabbitmq_management_agent \
 		      rabbitmq_management_exchange \
 		      rabbitmq_management_themes \
-		      rabbitmq_management_visualiser \
 		      rabbitmq_message_timestamp \
 		      rabbitmq_metronome \
 		      rabbitmq_mqtt \
@@ -233,7 +226,7 @@ export base_rmq_ref
 # If cloning from this computed location fails, we fallback to RabbitMQ
 # upstream which is GitHub.
 
-# Maccro to transform eg. "rabbit_common" to "rabbitmq-common".
+# Macro to transform eg. "rabbit_common" to "rabbitmq-common".
 rmq_cmp_repo_name = $(word 2,$(dep_$(1)))
 
 # Upstream URL for the current project.