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Matplotlib useable on clusters with read-only resp. non-existing home directories on compute nodes. #2695

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Matplotlib useable on clusters with read-only resp. non-existing home directories on compute nodes. #2695

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35 changes: 20 additions & 15 deletions lib/matplotlib/__init__.py
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Expand Up @@ -531,11 +531,12 @@ def _get_xdg_config_dir():
base directory spec
<http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html>`_.
"""
home = get_home()
if home is None:
return None
else:
return os.environ.get('XDG_CONFIG_HOME', os.path.join(home, '.config'))
path = os.environ.get('XDG_CONFIG_HOME')
if not path:
path = get_home()
if path:
path = os.path.join(path, '.config')
return path


def _get_xdg_cache_dir():
Expand All @@ -544,11 +545,12 @@ def _get_xdg_cache_dir():
base directory spec
<http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html>`_.
"""
home = get_home()
if home is None:
return None
else:
return os.environ.get('XDG_CACHE_HOME', os.path.join(home, '.cache'))
path = os.environ.get('XDG_CACHE_HOME')
if not path:
path = get_home()
if path:
path = os.path.join(path, '.cache')
return path


def _get_config_or_cache_dir(xdg_base):
Expand All @@ -566,13 +568,16 @@ def _get_config_or_cache_dir(xdg_base):

p = None
h = get_home()
if h is not None:
if h:
p = os.path.join(h, '.matplotlib')
if (sys.platform.startswith('linux') and
xdg_base is not None):
p = os.path.join(xdg_base, 'matplotlib')
if sys.platform.startswith('linux') and not os.path.exists(p):
# no old config exists
if xdg_base:
p = os.path.join(xdg_base, 'matplotlib')
else:
p = None

if p is not None:
if p:
if os.path.exists(p):
if _is_writable_dir(p):
return p
Expand Down