var.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Eric Biederman, 2005
   5  */
   6 #include "cache.h"
   7 #include <stdio.h>
   8 #include <errno.h>
   9 #include <string.h>
  10
  11 static char *var_usage = "git-var [-l | <variable>]";
  12
  13 struct git_var {
  14         const char *name;
  15         char *(*read)(void);
  16 };
  17 static struct git_var git_vars[] = {
  18         { "GIT_COMMITTER_IDENT", git_committer_info },
  19         { "GIT_AUTHOR_IDENT",   git_author_info },
  20         { "", NULL },
  21 };
  22
  23 static void list_vars(void)
  24 {
  25         struct git_var *ptr;
  26         for(ptr = git_vars; ptr->read; ptr++) {
  27                 printf("%s=%s\n", ptr->name, ptr->read());
  28         }
  29 }
  30
  31 static const char *read_var(const char *var)
  32 {
  33         struct git_var *ptr;
  34         const char *val;
  35         val = NULL;
  36         for(ptr = git_vars; ptr->read; ptr++) {
  37                 if (strcmp(var, ptr->name) == 0) {
  38                         val = ptr->read();
  39                         break;
  40                 }
  41         }
  42         return val;
  43 }
  44
  45 int main(int argc, char **argv)
  46 {
  47         const char *val;
  48         if (argc != 2) {
  49                 usage(var_usage);
  50         }
  51         setup_ident();
  52         val = NULL;
  53
  54         if (strcmp(argv[1], "-l") == 0) {
  55                 list_vars();
  56                 return 0;
  57         }
  58         val = read_var(argv[1]);
  59         if (!val)
  60                 usage(var_usage);
  61
  62         printf("%s\n", val);
  63
  64         return 0;
  65 }