Feat(config): getlist

[m_librarian.git] / m_librarian / config.py

diff --git a/m_librarian/config.py b/m_librarian/config.py
index c57406ba1601e11901b337e43b8ba6a01d60c340..b4a7b603d23d0fe06c4c693fb5081f0b29f9b6ad 100755 (executable)
--- a/m_librarian/config.py
+++ b/m_librarian/config.py
@@ -1,32 +1,98 @@
 #! /usr/bin/env python
 
-__all__ = ['ml_conf']
-
+from __future__ import print_function
 import os
-from ConfigParser import SafeConfigParser
-
-config_dirs = []
-if 'XDG_CONFIG_HOME' in os.environ:
-    config_dirs.append(os.environ['XDG_CONFIG_HOME'])
-if 'XDG_CONFIG_DIRS' in os.environ:
-    config_dirs.extend(os.environ['XDG_CONFIG_DIRS'].split(':'))
-home_config = os.path.expanduser('~/.config')
-if home_config not in config_dirs:
-    config_dirs.append(home_config)
-
-for d in config_dirs:
-    ml_conf_file = os.path.join(d, 'm_librarian.conf')
-    if os.path.exists(ml_conf_file):
-        ml_conf = SafeConfigParser()
-        ml_conf.read(ml_conf_file)
-        break
-else:
-    ml_conf = ml_conf_file = None
+try:
+    from ConfigParser import RawConfigParser, NoSectionError, NoOptionError
+except ImportError:  # py3
+    from configparser import RawConfigParser, NoSectionError, NoOptionError
+
+
+__all__ = ['get_config']
+
+
+def _find_config_dirs_posix():
+    config_dirs = []
+    if 'XDG_CONFIG_HOME' in os.environ:
+        config_dirs.append(os.environ['XDG_CONFIG_HOME'])
+    if 'XDG_CONFIG_DIRS' in os.environ:
+        config_dirs.extend(os.environ['XDG_CONFIG_DIRS'].split(':'))
+    home_config = os.path.expanduser('~/.config')
+    if home_config not in config_dirs:
+        config_dirs.append(home_config)
+    return config_dirs
+
+
+def find_config_dirs():
+    if os.name == 'posix':
+        return _find_config_dirs_posix()
+    return None
+
+
+def find_config_file(config_dirs=None):
+    if config_dirs is None:
+        config_dirs = find_config_dirs()
+    for d in config_dirs:
+        ml_conf_file = os.path.join(d, 'm_librarian.conf')
+        if os.path.exists(ml_conf_file):
+            return ml_conf_file
+    else:
+        return None
+
+
+_ml_config = None
+
+
+class ConfigWrapper(object):
+    def __init__(self, config):
+        self.config = config
+
+    def get(self, section, option, default=None):
+        try:
+            return self.config.get(section, option)
+        except (NoSectionError, NoOptionError):
+            return default
+
+    def set(self, section, option, value):
+        self.config.set(section, option, value)
+
+    def getint(self, section, option, default=0):
+        try:
+            return self.config.getint(section, option)
+        except (NoSectionError, NoOptionError):
+            return default
+        # Do not catch ValueError here, it must be propagated
+
+    def getlist(self, section, option, default=None, sep=None):
+        value = self.get(section, option)
+        if not value:
+            if default is None:
+                return []
+            return default
+        return value.split(sep)
+
+    def getpath(self, section, option, default=os.path.curdir):
+        path = self.get(section, option, default=default)
+        return os.path.expanduser(os.path.expandvars(path))
+
+
+def get_config(config_path=None):
+    global _ml_config
+    if _ml_config is None:
+        _ml_config = RawConfigParser()
+        if config_path is None:
+            config_path = find_config_file()
+        if config_path is not None:
+            _ml_config.read(config_path)
+        _ml_config = ConfigWrapper(_ml_config)
+    return _ml_config
 
 
 def test():
-    print "Config dirs:", config_dirs
-    print "Config file:", ml_conf_file
+    config_dirs = find_config_dirs()
+    print("Config dirs:", config_dirs)
+    print("Config file:", find_config_file(config_dirs))
+
 
 if __name__ == '__main__':
     test()