dib-lint: python3 compatibility fixes

When using up to date distributions for dib development, pep8
installs using python3.  This patch fixes the problem, that
not the complete dib-lint (which is called) is compatible
with python3.

Change-Id: I417d03746edb4d34011b997edf8b5b9662ea6f09
Signed-off-by: Andreas Florath <andreas@florath.net>

bin/dib-lint

@@ -34,11 +34,15 @@ parse_exclusions() {
     #   ignore = sete setu
     section="dib-lint"
     option="ignore"
-    global_exclusions=$(python -c \
-        "import ConfigParser; \
-        conf=ConfigParser.ConfigParser(); \
-        conf.read('tox.ini'); \
-        print conf.get('$section', '$option') if conf.has_option('$section', '$option') else ''"
+    global_exclusions=$(python - <<EOF
+try:
+  import configparser
+except ImportError:
+  import ConfigParser as configparser
+conf=configparser.ConfigParser()
+conf.read('tox.ini')
+print(conf.get('$section', '$option')) if conf.has_option('$section', '$option') else ''
+EOF
     )
     echo $exclusions $global_exclusions
 }

elements/pypi/pre-install.d/00-configure-pypi-mirror

@@ -45,7 +45,7 @@ def main():
     if use_pypi_python_org:
         indices.append('https://pypi.python.org/simple')
     retries = os.environ.get('DIB_PIP_RETRIES')
-    with file(home + '/.pip/pip.conf', 'wt') as output:
+    with open(home + '/.pip/pip.conf', 'wt') as output:
         output.write('[global]\n')
         output.write('log = %s/pip.log\n' % (home,))
         output.write('index-url = %s\n' % (indices[0],))
@@ -53,7 +53,7 @@ def main():
             output.write('retries = %s\n' % retries)
         for index in indices[1:]:
             output.write('extra-index-url = %s\n' % (index,))
-    with file(home + '/.pydistutils.cfg', 'wt') as output:
+    with open(home + '/.pydistutils.cfg', 'wt') as output:
         output.write('[easy_install]\n')
         output.write('index_url = %s\n' % (easy_index,))