--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/frontends/src/jp/arg_tools.py	Sat Jul 08 21:45:14 2017 +0200
@@ -0,0 +1,93 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# jp: a SàT command line tool
+# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sat.core.i18n import _
+from sat.core import exceptions
+
+
+def escape(arg, smart=True):
+    """format arg with quotes
+
+    @param smart(bool): if True, only escape if needed
+    """
+    if smart and not ' ' in arg and not '"' in arg:
+        return arg
+    return u'"' + arg.replace(u'"',u'\\"') + u'"'
+
+
+def get_cmd_choices(cmd=None, parser=None):
+    try:
+        choices = parser._subparsers._group_actions[0].choices
+        return choices[cmd] if cmd is not None else choices
+    except (KeyError, AttributeError):
+        raise exceptions.NotFound
+
+
+def get_use_args(host, args, use, verbose=False, parser=None):
+    """format args for argparse parser with values prefilled
+
+    @param host(JP): jp instance
+    @param args(list(str)): arguments to use
+    @param use(dict[str, str]): arguments to fill if found in parser
+    @param verbose(bool): if True a message will be displayed when argument is used or not
+    @param parser(argparse.ArgumentParser): parser to use
+    """
+    if parser is None:
+        parser = host.parser
+
+    # we check not optional args to see if there
+    # is a corresonding parser
+    # else USE args would not work correctly (only for current parser)
+    cmd_args = []
+    for arg in args:
+        if arg.startswith('-'):
+            break
+        try:
+            parser = get_cmd_choices(arg, parser)
+        except exceptions.NotFound:
+            break
+        cmd_args.append(arg)
+
+    # we remove command args
+    # they'll be in returned list (use_args)
+    del args[:len(cmd_args)]
+
+    opt_args = []
+    pos_args = []
+    actions = {a.dest: a for a in parser._actions}
+    for arg, value in use.iteritems():
+        try:
+            if arg == u'item' and not u'item' in actions:
+                # small hack when --item is appended to a --items list
+                arg = u'items'
+            action = actions[arg]
+        except KeyError:
+            if verbose:
+                host.disp(_(u'ignoring {name}={value}, not corresponding to any argument (in USE)').format(
+                    name=arg,
+                    value=escape(value)))
+        else:
+            if verbose:
+                host.disp(_(u'arg {name}={value} set (in USE)').format(name=arg, value=escape(value)))
+            if not action.option_strings:
+                pos_args.append(value)
+            else:
+                opt_args.append(action.option_strings[0])
+                opt_args.append(value)
+    return cmd_args + opt_args + pos_args