1 files changed, 129 insertions, 0 deletions
diff --git a/attoconf/types.py b/attoconf/types.py
new file mode 100644
index 0000000..e1af528
--- /dev/null
+++ b/attoconf/types.py
@@ -0,0 +1,129 @@
+#   Copyright 2013-2014 Ben Longbons <b.r.longbons@gmail.com>
+#
+#   This file is part of attoconf.
+#
+#   attoconf is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   attoconf is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with attoconf.  If not, see <http://www.gnu.org/licenses/>.
+
+
+
+import os
+from pipes import quote as shell_quote
+from shlex import split as shell_split
+
+from .core import trim_trailing_slashes
+
+
+class IntRange(object):
+    def __init__(self, min, max):
+        self.min = min
+        self.max = max
+
+    def __call__(self, s):
+        i = int(s)
+        if self.min <= i <= self.max:
+            return i
+        raise ValueError('%d is out of range' % i)
+
+sint = IntRange(float('-inf'), float('inf'))
+uint = IntRange(0, float('inf'))
+
+
+class enum(object):
+    __slots__ = ('args',)
+
+    def __init__(self, *args):
+        self.args = args
+
+    def __call__(self, s):
+        if s in self.args:
+            return s
+        raise ValueError('%r not in {%s}' % (s, ', '.join(self.args)))
+
+
+class maybe(object):
+    __slots__ = ('inferior')
+
+    def __init__(self, inferior):
+        self.inferior = inferior
+
+    def __call__(self, s):
+        if not s:
+            return s
+        return (self.inferior)(s)
+
+
+class ShellList(object):
+    ''' An argument type representing a sequence of 0 or more arguments
+    '''
+    __slots__ = ('list',)
+    def __init__(self, arg):
+        if isinstance(arg, str):
+            self.list = shell_split(arg)
+        elif isinstance(arg, list):
+            self.list = arg[:]
+        elif isinstance(arg, ShellList):
+            self.list = arg.list[:]
+        else:
+            raise TypeError('arg is an instance of %s' % type(arg).__name__)
+
+    def __str__(self):
+        return ' '.join(shell_quote(a) for a in self.list)
+
+    def __add__(self, other):
+        if isinstance(other, str):
+            other = shell_split(other)
+        elif isinstance(other, ShellList):
+            other = other.list
+        elif not isinstance(other, list):
+            raise TypeError('arg is an instance of %s' % type(arg).__name__)
+        return ShellList(self.list + other)
+
+
+def shell_word(s):
+    if s != shell_quote(s):
+        raise ValueError('not a word: %r' % s)
+    return s
+
+
+def shell_partial_word(s):
+    if s == '':
+        return s
+    return shell_word(s)
+
+
+def quoted_string(s):
+    return shell_quote(s)
+
+
+def filepath(s):
+    s = trim_trailing_slashes(s)
+    # must be absolute *and* canonical, except joinable
+    a = os.path.abspath(s)
+    if a == '/':
+        # filepaths often directly cat a subpath
+        # @me@/whatever is invalid if @me@ == /
+        a = '/.'
+    if s != a:
+        raise ValueError('Not an absolute, canonical (except joinable) pathname: %r != %r' % (s, a))
+    return s
+
+
+def triple(s):
+    # Triples do not, in fact, follow a regular pattern.
+    # Some have only two segments, some appear to have four ...
+    # Also, sometimes a wrong thing is used as a triple.
+    # All we *really* care about is generating the tool names.
+    if s.startswith('-') or s.endswith('-') or '-' not in s[1:-1]:
+        raise ValueError('Probably not a triple')
+    return s