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-rw-r--r--debian/lib/python/debian_linux/kconfig.py93
1 files changed, 93 insertions, 0 deletions
diff --git a/debian/lib/python/debian_linux/kconfig.py b/debian/lib/python/debian_linux/kconfig.py
new file mode 100644
index 000000000..73d491d7f
--- /dev/null
+++ b/debian/lib/python/debian_linux/kconfig.py
@@ -0,0 +1,93 @@
+from collections import OrderedDict
+
+__all__ = (
+ "KconfigFile",
+)
+
+
+class KConfigEntry(object):
+ __slots__ = 'name', 'value', 'comments'
+
+ def __init__(self, name, value, comments=None):
+ self.name, self.value = name, value
+ self.comments = comments or []
+
+ def __eq__(self, other):
+ return self.name == other.name and self.value == other.value
+
+ def __hash__(self):
+ return hash(self.name) | hash(self.value)
+
+ def __repr__(self):
+ return ('<{}({!r}, {!r}, {!r})>'
+ .format(self.__class__.__name__, self.name, self.value,
+ self.comments))
+
+ def __str__(self):
+ return 'CONFIG_{}={}'.format(self.name, self.value)
+
+ def write(self):
+ for comment in self.comments:
+ yield '#. ' + comment
+ yield str(self)
+
+
+class KConfigEntryTristate(KConfigEntry):
+ __slots__ = ()
+
+ VALUE_NO = False
+ VALUE_YES = True
+ VALUE_MOD = object()
+
+ def __init__(self, name, value, comments=None):
+ if value == 'n' or value is None:
+ value = self.VALUE_NO
+ elif value == 'y':
+ value = self.VALUE_YES
+ elif value == 'm':
+ value = self.VALUE_MOD
+ else:
+ raise NotImplementedError
+ super(KConfigEntryTristate, self).__init__(name, value, comments)
+
+ def __str__(self):
+ if self.value is self.VALUE_MOD:
+ return 'CONFIG_{}=m'.format(self.name)
+ if self.value:
+ return 'CONFIG_{}=y'.format(self.name)
+ return '# CONFIG_{} is not set'.format(self.name)
+
+
+class KconfigFile(OrderedDict):
+ def __str__(self):
+ ret = []
+ for i in self.str_iter():
+ ret.append(i)
+ return '\n'.join(ret) + '\n'
+
+ def read(self, f):
+ for line in iter(f.readlines()):
+ line = line.strip()
+ if line.startswith("CONFIG_"):
+ i = line.find('=')
+ option = line[7:i]
+ value = line[i + 1:]
+ self.set(option, value)
+ elif line.startswith("# CONFIG_"):
+ option = line[9:-11]
+ self.set(option, 'n')
+ elif line.startswith("#") or not line:
+ pass
+ else:
+ raise RuntimeError("Can't recognize %s" % line)
+
+ def set(self, key, value):
+ if value in ('y', 'm', 'n'):
+ entry = KConfigEntryTristate(key, value)
+ else:
+ entry = KConfigEntry(key, value)
+ self[key] = entry
+
+ def str_iter(self):
+ for key, value in self.items():
+ yield str(value)