Question: Can you implement subcomands using with this library? #34

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1. cofyc commented on Sep 7, 2020

   

   cofyc

   on Sep 7, 2020

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   no builtin support, but it's easy to implement, e.g.

   struct cmd_struct {
       const char *cmd;
       int len;
       int (*fn) (int, const char **);
       const char *help;
   };
   
   static struct cmd_struct commands[] = { 
       {"sub", 3, sub_cmd, NULL},
       ...
   }
   
   argc = argparse_parse(&argparse, argc, argv);
   if (argc < 1) {
       // show help
   }   
   
   /* 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];
       }   
   }  
   
   // run the command
   
2. a-random-lemurian commented on Feb 9, 2022

   

   a-random-lemurian

   on Feb 9, 2022

   Last edited by a-random-lemurian

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   Are there plans to add subcommand support to the library?

   P.S. Oh, there was a closed issue about subcommands.
3. cofyc commented on Feb 10, 2022

   

   cofyc

   on Feb 10, 2022

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   no, however you can follow this example
4. a-random-lemurian commented on Feb 10, 2022

   

   a-random-lemurian

   on Feb 10, 2022

   Last edited by a-random-lemurian

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   no, however you can follow this example

   that example just causes a segfault when I cmd->fn(argc, argv), what should I put in place of // run the command?

   P.S I finally got a working example.... I'm gonna push it real quick
   P.S[2] Here's the working example https://github.com/a-random-lemurian/uselinux/blob/main/src/rmbloat/rmbloat.c
5. cofyc commented on Feb 10, 2022

   

   cofyc

   on Feb 10, 2022

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   I also create a full example here: https://github.com/cofyc/argparse/blob/master/tests/subcommands.c
6. a-random-lemurian commented on Feb 10, 2022

   

   a-random-lemurian

   on Feb 10, 2022

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   I also create a full example here: https://github.com/cofyc/argparse/blob/master/tests/subcommands.c

   LGTM, but unfortunately it doesn't say anything about adding options to the subcommands themselves.
7. cofyc commented on Feb 11, 2022

   

   cofyc

   on Feb 11, 2022

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   If you need to parse arguments for subcommand, you can init and config argparse to parse arguments in the same way as in the main program.
8. cofyc commented on Feb 11, 2022

   

   cofyc

   on Feb 11, 2022

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   the example is updated, see the latest version.

   Note that ARGPARSE_STOP_AT_NON_OPTION must be passed to argparse_init in the main program.