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 static const char *editor(int flag)
  12 {
  13         const char *pgm = git_editor();
  14
  15         if (!pgm && flag & IDENT_ERROR_ON_NO_NAME)
  16                 die("Terminal is dumb, but EDITOR unset");
  17
  18         return pgm;
  19 }
  20
  21 struct git_var {
  22         const char *name;
  23         const char *(*read)(int);
  24 };
  25 static struct git_var git_vars[] = {
  26         { "GIT_COMMITTER_IDENT", git_committer_info },
  27         { "GIT_AUTHOR_IDENT",   git_author_info },
  28         { "GIT_EDITOR", editor },
  29         { "", NULL },
  30 };
  31
  32 static void list_vars(void)
  33 {
  34         struct git_var *ptr;
  35         const char *val;
  36
  37         for (ptr = git_vars; ptr->read; ptr++)
  38                 if ((val = ptr->read(0)))
  39                         printf("%s=%s\n", ptr->name, val);
  40 }
  41
  42 static const char *read_var(const char *var)
  43 {
  44         struct git_var *ptr;
  45         const char *val;
  46         val = NULL;
  47         for (ptr = git_vars; ptr->read; ptr++) {
  48                 if (strcmp(var, ptr->name) == 0) {
  49                         val = ptr->read(IDENT_ERROR_ON_NO_NAME);
  50                         break;
  51                 }
  52         }
  53         return val;
  54 }
  55
  56 static int show_config(const char *var, const char *value, void *cb)
  57 {
  58         if (value)
  59                 printf("%s=%s\n", var, value);
  60         else
  61                 printf("%s\n", var);
  62         return git_default_config(var, value, cb);
  63 }
  64
  65 int main(int argc, char **argv)
  66 {
  67         const char *val;
  68         int nongit;
  69         if (argc != 2) {
  70                 usage(var_usage);
  71         }
  72
  73         git_extract_argv0_path(argv[0]);
  74
  75         setup_git_directory_gently(&nongit);
  76         val = NULL;
  77
  78         if (strcmp(argv[1], "-l") == 0) {
  79                 git_config(show_config, NULL);
  80                 list_vars();
  81                 return 0;
  82         }
  83         git_config(git_default_config, NULL);
  84         val = read_var(argv[1]);
  85         if (!val)
  86                 usage(var_usage);
  87
  88         printf("%s\n", val);
  89
  90         return 0;
  91 }