var.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Eric Biederman, 2005
   5  */
   6 #include "cache.h"
   7 #include "exec_cmd.h"
   8
   9 static const char var_usage[] = "git var [-l | <variable>]";
  10
  11 struct git_var {
  12         const char *name;
  13         const char *(*read)(int);
  14 };
  15 static struct git_var git_vars[] = {
  16         { "GIT_COMMITTER_IDENT", git_committer_info },
  17         { "GIT_AUTHOR_IDENT",   git_author_info },
  18         { "", NULL },
  19 };
  20
  21 static void list_vars(void)
  22 {
  23         struct git_var *ptr;
  24         for(ptr = git_vars; ptr->read; ptr++) {
  25                 printf("%s=%s\n", ptr->name, ptr->read(IDENT_WARN_ON_NO_NAME));
  26         }
  27 }
  28
  29 static const char *read_var(const char *var)
  30 {
  31         struct git_var *ptr;
  32         const char *val;
  33         val = NULL;
  34         for(ptr = git_vars; ptr->read; ptr++) {
  35                 if (strcmp(var, ptr->name) == 0) {
  36                         val = ptr->read(IDENT_ERROR_ON_NO_NAME);
  37                         break;
  38                 }
  39         }
  40         return val;
  41 }
  42
  43 static int show_config(const char *var, const char *value, void *cb)
  44 {
  45         if (value)
  46                 printf("%s=%s\n", var, value);
  47         else
  48                 printf("%s\n", var);
  49         return git_default_config(var, value, cb);
  50 }
  51
  52 int main(int argc, char **argv)
  53 {
  54         const char *val;
  55         int nongit;
  56         if (argc != 2) {
  57                 usage(var_usage);
  58         }
  59
  60         git_extract_argv0_path(argv[0]);
  61
  62         setup_git_directory_gently(&nongit);
  63         val = NULL;
  64
  65         if (strcmp(argv[1], "-l") == 0) {
  66                 git_config(show_config, NULL);
  67                 list_vars();
  68                 return 0;
  69         }
  70         git_config(git_default_config, NULL);
  71         val = read_var(argv[1]);
  72         if (!val)
  73                 usage(var_usage);
  74
  75         printf("%s\n", val);
  76
  77         return 0;
  78 }