C-code generator for docopt language

Step 1. Describe your CLI in docopt language

Naval Fate.

Usage:
  naval_fate.py ship create <name>...
  naval_fate.py ship <name> move <x> <y> [--speed=<kn>]
  naval_fate.py ship shoot <x> <y>
  naval_fate.py mine (set|remove) <x> <y> [--moored|--drifting]
  naval_fate.py --help
  naval_fate.py --version

Options:
  -h --help     Show this screen.
  --version     Show version.
  --speed=<kn>  Speed in knots [default: 10].
  --moored      Moored (anchored) mine.
  --drifting    Drifting mine.

Step 2. Generate the C code

$ python docopt_c.py -o docopt.c example.docopt

or by using pipe

$ cat example.docopt | python docopt_c.py > docopt.c

Step 3. Include the generated docopt.c into your program

#include "docopt.c"

int main(int argc, char *argv[])
{
    DocoptArgs args = docopt(argc, argv, /* help */ 1, /* version */ "2.0rc2");

    printf("Commands\n");
    printf("    mine == %s\n", args.mine ? "true" : "false");
    printf("    move == %s\n", args.move ? "true" : "false");
    printf("    create == %s\n", args.create ? "true" : "false");
    printf("    remove == %s\n", args.remove ? "true" : "false");
    printf("    set == %s\n", args.set ? "true" : "false");
    printf("    ship == %s\n", args.ship ? "true" : "false");
    printf("    shoot == %s\n", args.shoot ? "true" : "false");
    printf("Arguments\n");
    printf("    name == %s\n", args.name);
    printf("    x == %s\n", args.x);
    printf("    y == %s\n", args.y);
    printf("Flags\n");
    printf("    --drifting == %s\n", args.drifting ? "true" : "false");
    printf("    --help == %s\n", args.help ? "true" : "false");
    printf("    --moored == %s\n", args.moored ? "true" : "false");
    printf("    --version == %s\n", args.version ? "true" : "false");
    printf("Options\n");
    printf("    --speed == %s\n", args.speed);
    return 0;
}

Step 4. Profit!

$ c99 example.c -o example.out
$ ./example.out mine --drifting --speed=20
Commands
    mine == true
    move == false
    create == false
    remove == false
    set == false
    ship == false
    shoot == false
Arguments
    name == (null)
    x == (null)
    y == (null)
Flags
    --drifting == true
    --help == false
    --moored == false
    --version == false
Options
    --speed == 20

Development

See the Python version's page for more info on developing.