builtin/var.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Eric Biederman, 2005
   5  */
   6 #include "builtin.h"
   7 #include "config.h"
   8 #include "editor.h"
   9 #include "ident.h"
  10 #include "pager.h"
  11 #include "refs.h"
  12
  13 static const char var_usage[] = "git var (-l | <variable>)";
  14
  15 static const char *editor(int ident_flag UNUSED)
  16 {
  17         return git_editor();
  18 }
  19
  20 static const char *sequence_editor(int ident_flag UNUSED)
  21 {
  22         return git_sequence_editor();
  23 }
  24
  25 static const char *pager(int ident_flag UNUSED)
  26 {
  27         const char *pgm = git_pager(1);
  28
  29         if (!pgm)
  30                 pgm = "cat";
  31         return pgm;
  32 }
  33
  34 static const char *default_branch(int ident_flag UNUSED)
  35 {
  36         return git_default_branch_name(1);
  37 }
  38
  39 static const char *shell_path(int ident_flag UNUSED)
  40 {
  41         return SHELL_PATH;
  42 }
  43
  44 struct git_var {
  45         const char *name;
  46         const char *(*read)(int);
  47 };
  48 static struct git_var git_vars[] = {
  49         {
  50                 .name = "GIT_COMMITTER_IDENT",
  51                 .read = git_committer_info,
  52         },
  53         {
  54                 .name = "GIT_AUTHOR_IDENT",
  55                 .read = git_author_info,
  56         },
  57         {
  58                 .name = "GIT_EDITOR",
  59                 .read = editor,
  60         },
  61         {
  62                 .name = "GIT_SEQUENCE_EDITOR",
  63                 .read = sequence_editor,
  64         },
  65         {
  66                 .name = "GIT_PAGER",
  67                 .read = pager,
  68         },
  69         {
  70                 .name = "GIT_DEFAULT_BRANCH",
  71                 .read = default_branch,
  72         },
  73         {
  74                 .name = "GIT_SHELL_PATH",
  75                 .read = shell_path,
  76         },
  77         {
  78                 .name = "",
  79                 .read = NULL,
  80         },
  81 };
  82
  83 static void list_vars(void)
  84 {
  85         struct git_var *ptr;
  86         const char *val;
  87
  88         for (ptr = git_vars; ptr->read; ptr++)
  89                 if ((val = ptr->read(0)))
  90                         printf("%s=%s\n", ptr->name, val);
  91 }
  92
  93 static const struct git_var *get_git_var(const char *var)
  94 {
  95         struct git_var *ptr;
  96         for (ptr = git_vars; ptr->read; ptr++) {
  97                 if (strcmp(var, ptr->name) == 0) {
  98                         return ptr;
  99                 }
 100         }
 101         return NULL;
 102 }
 103
 104 static int show_config(const char *var, const char *value, void *cb)
 105 {
 106         if (value)
 107                 printf("%s=%s\n", var, value);
 108         else
 109                 printf("%s\n", var);
 110         return git_default_config(var, value, cb);
 111 }
 112
 113 int cmd_var(int argc, const char **argv, const char *prefix UNUSED)
 114 {
 115         const struct git_var *git_var;
 116         const char *val;
 117
 118         if (argc != 2)
 119                 usage(var_usage);
 120
 121         if (strcmp(argv[1], "-l") == 0) {
 122                 git_config(show_config, NULL);
 123                 list_vars();
 124                 return 0;
 125         }
 126         git_config(git_default_config, NULL);
 127
 128         git_var = get_git_var(argv[1]);
 129         if (!git_var)
 130                 usage(var_usage);
 131
 132         val = git_var->read(IDENT_STRICT);
 133         if (!val)
 134                 return 1;
 135
 136         printf("%s\n", val);
 137
 138         return 0;
 139 }