1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
## hello, world
This is the initial release of scopt, a little command line parsing library.
You can customize an *OptionParser* by passing in functions to process each option or argument.
val parser = new OptionParser("scopt") {
intOpt("f", "foo", "foo is an integer property", {v: Int => config.foo = v})
opt("o", "output", "<file>", "output is a string property", {v: String => config.bar = v})
booleanOpt("xyz", "xyz is a boolean property", {v: Boolean => config.xyz = v})
keyValueOpt("l", "lib", "<libname>", "<filename>", "load library <libname>",
{(key: String, value: String) => { config.libname = key; config.libfile = value } })
arg("<singlefile>", "<singlefile> is an argument", {v: String => config.whatnot = v})
// arglist("<file>...", "arglist allows variable number of arguments",
// {v: String => config.files = (v :: config.files).reverse })
}
if (parser.parse(args)) {
// do stuff
}
else {
// arguments are bad, usage message will have been displayed
}
It handles various kinds of options such as optional, required, and key-value.
From the above, it also automatically generates the usage text as follows:
Usage: scopt [options] <filename>
-f <value> | --foo <value>
foo is an integer property
-o <file> | --output <file>
output is a string property
--xyz <value>
xyz is a boolean property
-l:<libname>=<filename> | --lib:<libname>=<filename>
load library <libname>
<singlefile>
<singlefile> is an argument
|
