var.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Eric Biederman, 2005
   5  */
   6 #include "cache.h"
   7
   8 static const char var_usage[] = "git-var [-l | <variable>]";
   9
  10 struct git_var {
  11         const char *name;
  12         const char *(*read)(int);
  13 };
  14 static struct git_var git_vars[] = {
  15         { "GIT_COMMITTER_IDENT", git_committer_info },
  16         { "GIT_AUTHOR_IDENT",   git_author_info },
  17         { "", NULL },
  18 };
  19
  20 static void list_vars(void)
  21 {
  22         struct git_var *ptr;
  23         for(ptr = git_vars; ptr->read; ptr++) {
  24                 printf("%s=%s\n", ptr->name, ptr->read(IDENT_WARN_ON_NO_NAME));
  25         }
  26 }
  27
  28 static const char *read_var(const char *var)
  29 {
  30         struct git_var *ptr;
  31         const char *val;
  32         val = NULL;
  33         for(ptr = git_vars; ptr->read; ptr++) {
  34                 if (strcmp(var, ptr->name) == 0) {
  35                         val = ptr->read(IDENT_ERROR_ON_NO_NAME);
  36                         break;
  37                 }
  38         }
  39         return val;
  40 }
  41
  42 static int show_config(const char *var, const char *value, void *cb)
  43 {
  44         if (value)
  45                 printf("%s=%s\n", var, value);
  46         else
  47                 printf("%s\n", var);
  48         return git_default_config(var, value, cb);
  49 }
  50
  51 int main(int argc, char **argv)
  52 {
  53         const char *val;
  54         int nongit;
  55         if (argc != 2) {
  56                 usage(var_usage);
  57         }
  58
  59         setup_git_directory_gently(&nongit);
  60         val = NULL;
  61
  62         if (strcmp(argv[1], "-l") == 0) {
  63                 git_config(show_config, NULL);
  64                 list_vars();
  65                 return 0;
  66         }
  67         git_config(git_default_config, NULL);
  68         val = read_var(argv[1]);
  69         if (!val)
  70                 usage(var_usage);
  71
  72         printf("%s\n", val);
  73
  74         return 0;
  75 }