build: Simplify fetching release version

PR-URL: https://github.com/iojs/io.js/pull/1405
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rod Vagg <rod@vagg.org>

Makefile

@@ -197,7 +197,7 @@ docclean:
 RAWVER=$(shell $(PYTHON) tools/getnodeversion.py)
 VERSION=v$(RAWVER)
 FULLVERSION=$(VERSION)
-RELEASE=$(shell $(PYTHON) tools/getnodeisrelease.py)
+RELEASE=($shell sed -ne 's/#define NODE_VERSION_IS_RELEASE \([01]\)/\1/p' src/node_version.h)
 PLATFORM=$(shell uname | tr '[:upper:]' '[:lower:]')
 NPMVERSION=v$(shell cat deps/npm/package.json | grep '"version"' | sed 's/^[^:]*: "\([^"]*\)",.*/\1/')
 ifeq ($(findstring x86_64,$(shell uname -m)),x86_64)

tools/getnodeisrelease.py

@@ -1,11 +0,0 @@
-import sys,os,re
-
-node_version_h = os.path.join(os.path.dirname(__file__), '..', 'src',
-    'node_version.h')
-
-f = open(node_version_h)
-
-for line in f:
-  if re.match('#define NODE_VERSION_IS_RELEASE', line):
-    release = int(line.split()[2])
-    print release