CommandLine

A parser for commandlines, returns an arg list and expands format strings given in a translation table. Additionally the commandline can end with %< specifying that the command expects input on stdin.

Some tests for the parser.

 formatTable = [('s',"<insert subject here>"),
                ('a',"<insert author here>")]

 testParser :: (Show a, Eq a) => Parser a -> String -> a -> a
 testParser p s ok = case parse p "" s of
                     Left e -> error $ "Parser failed with: " ++ (show e)
                     Right res -> if res == ok
                                  then res
                                  else error $ "Parser failed: got "
                                         ++ (show res) ++ ", expected "
                                         ++ (show ok)

 testCases = [("a b",(["a","b"], False)),
              ("a b %<",(["a","b"], True)),
              ("a b %< ",(["a","b"], True)),
              ("\"arg0 contains spaces \\\"quotes\\\"\" b",
               (["arg0 contains spaces \"quotes\"","b"],False)),
              ("a %s %<",(["a","<insert subject here>"], True))]

 runTests = map (uncurry $ testParser (commandline formatTable)) testCases

Documentation

parseCmd :: FTable -> String -> Either ParseError ([String], Bool)

parse a commandline returning a list of strings (intended to be used as argv) and a bool value which specifies if the command expects input on stdin format specifiers with a mapping in ftable are accepted and replaced by the given strings. E.g. if the ftable is [(s,Some subject)], then %s is replaced by Some subject

addUrlencoded :: FTable -> FTable

for every mapping (c,s), add a mapping with uppercase c and the urlencoded string s