From 80b02f11155e7949d20b041a760f39c01cf3d2ce Mon Sep 17 00:00:00 2001
From: Jared Flatow <jflatow@gmail.com>
Date: Tue, 7 Jun 2016 20:24:22 -0700
Subject: Add PROJECT_MOD var to make the app callback module configurable

---
 core/core.mk               | 1 +
 core/erlc.mk               | 4 ++--
 doc/src/guide/app.asciidoc | 2 ++
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/core/core.mk b/core/core.mk
index 5733496..8188bc3 100644
--- a/core/core.mk
+++ b/core/core.mk
@@ -24,6 +24,7 @@ PROJECT ?= $(notdir $(CURDIR))
 PROJECT := $(strip $(PROJECT))
 
 PROJECT_VERSION ?= rolling
+PROJECT_MOD ?= $(PROJECT)_app
 
 # Verbosity.
 
diff --git a/core/erlc.mk b/core/erlc.mk
index 695cc83..e231cc8 100644
--- a/core/erlc.mk
+++ b/core/erlc.mk
@@ -59,7 +59,7 @@ app:: clean deps $(PROJECT).d
 	$(verbose) $(MAKE) --no-print-directory app-build
 endif
 
-ifeq ($(wildcard src/$(PROJECT)_app.erl),)
+ifeq ($(wildcard src/$(PROJECT_MOD).erl),)
 define app_file
 {application, $(PROJECT), [
 	{description, "$(PROJECT_DESCRIPTION)"},
@@ -79,7 +79,7 @@ define app_file
 	{modules, [$(call comma_list,$(2))]},
 	{registered, [$(call comma_list,$(PROJECT)_sup $(PROJECT_REGISTERED))]},
 	{applications, [$(call comma_list,kernel stdlib $(OTP_DEPS) $(LOCAL_DEPS) $(DEPS))]},
-	{mod, {$(PROJECT)_app, []}}
+	{mod, {$(PROJECT_MOD), []}}
 ]}.
 endef
 endif
diff --git a/doc/src/guide/app.asciidoc b/doc/src/guide/app.asciidoc
index 99ff052..eef5d45 100644
--- a/doc/src/guide/app.asciidoc
+++ b/doc/src/guide/app.asciidoc
@@ -126,6 +126,8 @@ your situation.
 	Short description of the project.
 `PROJECT_VERSION`::
 	Current version of the project.
+`PROJECT_MOD`::
+        The application callback module.
 `PROJECT_REGISTERED`::
 	List of the names of all registered processes.
 `LOCAL_DEPS`::
-- 
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