main.c

#include "argparse.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char *project_name = NULL;
char *category_name = NULL;
char *create_relative_path = "Create";
char *create_absolute_path = NULL;

#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))

static const char *const usages[] = {
    "subcommands [options] [cmd] [args]",
    NULL,
};

struct cmd_struct {
  const char *cmd;
  int (*fn)(int, const char **);
};

int cmd_foo(int argc, const char **argv) {
  printf("executing subcommand foo\n");
  printf("argc: %d\n", argc);
  for (int i = 0; i < argc; i++) {
    printf("argv[%d]: %s\n", i, *(argv + i));
  }
  int force = 0;
  int test = 0;
  const char *path = NULL;
  struct argparse_option options[] = {
      OPT_HELP(),
      OPT_BOOLEAN('f', "force", &force, "force to do", NULL, 0, 0),
      OPT_BOOLEAN('t', "test", &test, "test only", NULL, 0, 0),
      OPT_STRING('p', "path", &path, "path to read", NULL, 0, 0),
      OPT_END(),
  };
  struct argparse argparse;
  argparse_init(&argparse, options, usages, 0);
  argc = argparse_parse(&argparse, argc, argv);
  printf("after argparse_parse:\n");
  printf("argc: %d\n", argc);
  for (int i = 0; i < argc; i++) {
    printf("argv[%d]: %s\n", i, *(argv + i));
  }
  return 0;
}

int cmd_bar(int argc, const char **argv) {
  printf("executing subcommand bar\n");
  for (int i = 0; i < argc; i++) {
    printf("argv[%d]: %s\n", i, *(argv + i));
  }
  return 0;
}

static struct cmd_struct commands[] = {
    {"foo", cmd_foo},
    {"bar", cmd_bar},
};

int main(int argc, const char **argv) {
  struct argparse argparse;
  struct argparse_option options[] = {
      OPT_HELP(),
      OPT_END(),
  };
  argparse_init(&argparse, options, usages, ARGPARSE_STOP_AT_NON_OPTION);
  argc = argparse_parse(&argparse, argc, argv);
  if (argc < 1) {
    argparse_usage(&argparse);
    return -1;
  }

  /* Try to run command with args provided. */
  struct cmd_struct *cmd = NULL;
  for (int i = 0; i < ARRAY_SIZE(commands); i++) {
    if (!strcmp(commands[i].cmd, argv[0])) {
      cmd = &commands[i];
    }
  }
  if (cmd) {
    return cmd->fn(argc, argv);
  }
  return 0;
}