Add class to simplify git argument handling

diff --git a/gbp/git/args.py b/gbp/git/args.py
new file mode 100644 (file)
index 0000000..ff9077e
--- /dev/null
+++ b/gbp/git/args.py
@@ -0,0 +1,91 @@
+# vim: set fileencoding=utf-8 :
+#
+# (C) 2011 Guido Guenther <agx@sigxcpu.org>
+#    This program 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 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program 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 this program; if not, write to the Free Software
+#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+class GitArgs(object):
+    """
+    Handle arguments to git commands
+
+    >>> GitArgs('-h', '--no-foo').args
+    ['-h', '--no-foo']
+    >>> GitArgs().add('--more-foo', '--less-bar').args
+    ['--more-foo', '--less-bar']
+    >>> GitArgs().add_cond(1 > 2, '--opt', '--no-opt').args
+    ['--no-opt']
+    >>> GitArgs().add_true(True, '--true').args
+    ['--true']
+    >>> GitArgs().add_false(True, '--true').args
+    []
+    >>> GitArgs().add_false(False, '--false').args
+    ['--false']
+    """
+
+    def __init__(self, *args):
+        self._args = list(args)
+
+    @property
+    def args(self):
+        return self._args
+
+    def add(self, *args):
+        """
+        Add arguments to argument list
+        """
+        self._args += list(args)
+        return self
+
+    def add_true(self, condition, *args):
+        """
+        Add I{args} if I{condition} is C{True}
+
+        @param condition: the condition to test
+        @type condition: C{bool}
+        @param args: arguments to add
+        """
+        if condition:
+            self._args += list(args)
+        return self
+
+    def add_false(self, condition, *args):
+        """
+        Add I{args} if I{condition} is C{False}
+
+        @param condition: the condition to test
+        @type condition: C{bool}
+        @param args: arguments to add
+        """
+        self.add_true(not condition, *args)
+        return self
+
+    def add_cond(self, condition, opt, noopt=[]):
+        """
+        Add option I{opt} to I{alist} if I{condition} is C{True}
+        else add I{noopt}.
+
+        @param condition: condition
+        @type condition: C{bool}
+        @param opt: option to add if I{condition} is C{True}
+        @type opt: C{str} or C{list}
+        @param noopt: option to add if I{condition} is C{False}
+        @type noopt: C{str} or C{list}
+        """
+        if isinstance(opt, basestring):
+            opt = [ opt ]
+        if isinstance(noopt, basestring):
+            noopt = [ noopt ]
+        self._args += opt if condition else noopt
+        return self
+