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Diffstat (limited to 'portato/helper.py')
| -rw-r--r-- | portato/helper.py | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/portato/helper.py b/portato/helper.py index 5cf57a0..331bf9a 100644 --- a/portato/helper.py +++ b/portato/helper.py @@ -45,6 +45,51 @@ def send_signal_to_group (sig): pgid = os.getpgrp() os.killpg(pgid, sig) +def paren_reduce(mystr): + """ + Take a string and convert all paren enclosed entities into sublists, optionally + futher splitting the list elements by spaces. + + This function is copied from portage. + + Example usage: + >>> paren_reduce('foobar foo ( bar baz )') + ['foobar', 'foo', ['bar', 'baz']] + + @param mystr: The string to reduce + @type mystr: String + @rtype: Array + @return: The reduced string in an array + """ + mylist = [] + while mystr: + left_paren = mystr.find("(") + has_left_paren = left_paren != -1 + right_paren = mystr.find(")") + has_right_paren = right_paren != -1 + if not has_left_paren and not has_right_paren: + freesec = mystr + subsec = None + tail = "" + elif mystr[0] == ")": + return [mylist,mystr[1:]] + elif has_left_paren and not has_right_paren: + error(_("Invalid dependency string")) + return [] + elif has_left_paren and left_paren < right_paren: + freesec,subsec = mystr.split("(",1) + subsec,tail = paren_reduce(subsec) + else: + subsec,tail = mystr.split(")",1) + subsec = filter(None, subsec.split(" ")) + return [mylist+subsec,tail] + mystr = tail + if freesec: + mylist = mylist + filter(None, freesec.split(" ")) + if subsec is not None: + mylist = mylist + [subsec] + return mylist + def flatten (listOfLists): """Flattens the given list of lists. |