From 5451df8416d89c42c30fd4d72eb0654cccbeff7f Mon Sep 17 00:00:00 2001
From: Euen <euenlopez@gmail.com>
Date: Tue, 17 Mar 2015 18:45:32 -0300
Subject: add as a plugin

---
 build.config    |  1 +
 erlang.mk       | 39 +++++++++++++++++++++++++++++++++++++++
 plugins/xref.mk | 38 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 78 insertions(+)
 create mode 100644 plugins/xref.mk

diff --git a/build.config b/build.config
index 7e60d80..7b75a8f 100644
--- a/build.config
+++ b/build.config
@@ -22,3 +22,4 @@ plugins/eunit
 plugins/relx
 plugins/shell
 plugins/triq
+plugins/xref
\ No newline at end of file
diff --git a/erlang.mk b/erlang.mk
index e6833bc..22d925b 100644
--- a/erlang.mk
+++ b/erlang.mk
@@ -1273,3 +1273,42 @@ triq: test-build
 	$(gen_verbose) $(call triq_run,[true] =:= lists:usort([triq:check(M) || M <- [$(MODULES)]]))
 endif
 endif
+
+# Copyright (c) 2015, Euen Lopez <euen@inakanetworks.com>
+# This file is part of erlang.mk and subject to the terms of the ISC License.
+
+.PHONY: xref distclean-xref
+
+# Configuration.
+
+ifeq ($(XREF_CONFIG),)
+	XREF_ARGS :=
+else
+	XREF_ARGS := -c $(XREF_CONFIG)
+endif
+
+XREFR ?= $(CURDIR)/xrefr
+export XREFR
+
+XREFR_URL ?= https://github.com/inaka/xref_runner/releases/download/0.2.0/xrefr
+
+# Core targets.
+
+help::
+	@printf "%s\n" "" \
+		"Xref targets:" \
+		"	xref				Run Xrefr using $XREF_CONFIG as config file if defined"
+
+distclean:: distclean-xref
+
+# Plugin-specific targets.
+
+$(XREFR):
+	@$(call core_http_get,$(XREFR),$(XREFR_URL))
+	@chmod +x $(XREFR)
+
+xref: deps app $(XREFR)
+	$(gen_verbose) $(XREFR) $(XREFR_ARGS)
+
+distclean-xref:
+	$(gen_verbose) rm -rf $(XREFR)
diff --git a/plugins/xref.mk b/plugins/xref.mk
new file mode 100644
index 0000000..14ef16e
--- /dev/null
+++ b/plugins/xref.mk
@@ -0,0 +1,38 @@
+# Copyright (c) 2015, Euen Lopez <euen@inakanetworks.com>
+# This file is part of erlang.mk and subject to the terms of the ISC License.
+
+.PHONY: xref distclean-xref
+
+# Configuration.
+
+ifeq ($(XREF_CONFIG),)
+	XREF_ARGS :=
+else
+	XREF_ARGS := -c $(XREF_CONFIG)
+endif
+
+XREFR ?= $(CURDIR)/xrefr
+export XREFR
+
+XREFR_URL ?= https://github.com/inaka/xref_runner/releases/download/0.2.0/xrefr
+
+# Core targets.
+
+help::
+	@printf "%s\n" "" \
+		"Xref targets:" \
+		"	xref				Run Xrefr using $XREF_CONFIG as config file if defined"
+
+distclean:: distclean-xref
+
+# Plugin-specific targets.
+
+$(XREFR):
+	@$(call core_http_get,$(XREFR),$(XREFR_URL))
+	@chmod +x $(XREFR)
+
+xref: deps app $(XREFR)
+	$(gen_verbose) $(XREFR) $(XREFR_ARGS)
+
+distclean-xref:
+	$(gen_verbose) rm -rf $(XREFR)
\ No newline at end of file
-- 
cgit v1.2.3


From 1a1915f8caab06860a8d14d17c184128dfea9acc Mon Sep 17 00:00:00 2001
From: Euen <euenlopez@gmail.com>
Date: Wed, 18 Mar 2015 12:30:09 -0300
Subject: update README.md

---
 README.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/README.md b/README.md
index 1d7fbeb..cb412ac 100644
--- a/README.md
+++ b/README.md
@@ -538,6 +538,19 @@ Or:
 $ make triq t=cow_http_hd:prop_parse_accept
 ```
 
+Xref plugin
+------------
+
+This plugin is available by default. It adds the following
+target:
+
+`xref` Erlang Xref Runner (inspired in rebar's rebar_xref)
+
+The `XREF_CONFIG` variable specifies the location of the
+configuration file which holds the checks to be applied.
+If there is no `xref.config` all `xref` checks will be
+applied to the binaries located in the `/ebin` directory.
+
 Contributing
 ------------
 
-- 
cgit v1.2.3