From 6d97b5504ac862850dcb9087db9dc2cda1dd90d3 Mon Sep 17 00:00:00 2001
From: David Pursehouse <david.pursehouse@sonymobile.com>
Date: Tue, 19 Feb 2013 18:05:29 +0900
Subject: [PATCH] Add asciidoc checks in the documentation makefile

Exit with error if the asciidoc executable is not available or
has version lower than 8.6.3

Change-Id: I953a65304d850dddd83f4c18e0254290ead8cf0f
---
 Documentation/Makefile | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/Makefile b/Documentation/Makefile
index 4c64dfec55..59de209ab3 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -14,6 +14,7 @@
 
 ASCIIDOC       ?= asciidoc
 ASCIIDOC_EXTRA ?=
+ASCIIDOC_VER   ?= 8.6.3
 SVN            ?= svn
 PUB_ROOT       ?= https://gerrit-documentation.googlecode.com/svn/Documentation
 
@@ -23,6 +24,16 @@ clean:
 	rm -f *.html
 	rm -rf $(LOCAL_ROOT)
 
+ASCIIDOC_EXE := $(shell which $(ASCIIDOC))
+ifeq ($(wildcard $(ASCIIDOC_EXE)),)
+  $(error $(ASCIIDOC) must be available)
+else
+  ASCIIDOC_OK := $(shell expr `asciidoc --version | cut -f2 -d' '` \>= $(ASCIIDOC_VER))
+  ifeq ($(ASCIIDOC_OK),0)
+    $(error $(ASCIIDOC) version $(ASCIIDOC_VER) or higher is required)
+  endif
+endif
+
 ifeq ($(origin VERSION), undefined)
   VERSION := $(shell ./GEN-DOC-VERSION 2>/dev/null)
 endif