Requested changes

Author: JaviCerveraIngram

VERSION

@@ -9,6 +9,7 @@
 from os.path import abspath, dirname, exists, join
 from os import environ
 from setuptools import find_packages, setup
+from warnings import warn
 
 try:  # for pip >= 10
     # noinspection PyProtectedMember,PyPackageRequirements
@@ -25,18 +26,25 @@
         'sdk.txt',
     ), session='None')
 
-# Try to write VERSION file from Travis tag
-TRAVIS_TAG = environ.get('TRAVIS_TAG')
-if TRAVIS_TAG and TRAVIS_TAG.strip():
-    with open('VERSION', 'w') as version_file:
-        version_file.write(TRAVIS_TAG.strip())
+# Get path to version file
+version_path = join(
+    dirname(abspath(__file__)),
+    'VERSION'
+)
+
+# Try to write version file from Travis tag
+travis_tag = environ.get('TRAVIS_TAG')
+if travis_tag and travis_tag.strip():
+    with open(version_path, 'w') as version_file:
+        version_file.write(travis_tag.strip())
 
-# Try to read VERSION from file
+# Try to read version from file
 try:
-    with open('VERSION', 'r') as version_file:
+    with open(version_path, 'r') as version_file:
         VERSION = version_file.read().strip()
 except IOError:
-    raise EnvironmentError('VERSION file could not be read.')
+    warn('`{}` file could not be read.'.format(version_path), RuntimeWarning)
+    VERSION = ''
 
 PACKAGES = find_packages(exclude=['tests*'])