editor.c

   1 #include "cache.h"
   2 #include "strbuf.h"
   3 #include "run-command.h"
   4
   5 #ifndef DEFAULT_EDITOR
   6 #define DEFAULT_EDITOR "vi"
   7 #endif
   8
   9 const char *git_editor(void)
  10 {
  11         const char *editor = getenv("GIT_EDITOR");
  12         const char *terminal = getenv("TERM");
  13         int terminal_is_dumb = !terminal || !strcmp(terminal, "dumb");
  14
  15         if (!editor && editor_program)
  16                 editor = editor_program;
  17         if (!editor && !terminal_is_dumb)
  18                 editor = getenv("VISUAL");
  19         if (!editor)
  20                 editor = getenv("EDITOR");
  21
  22         if (!editor && terminal_is_dumb)
  23                 return NULL;
  24
  25         if (!editor)
  26                 editor = DEFAULT_EDITOR;
  27
  28         return editor;
  29 }
  30
  31 int launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
  32 {
  33         const char *editor = git_editor();
  34
  35         if (!editor)
  36                 return error("Terminal is dumb, but EDITOR unset");
  37
  38         if (strcmp(editor, ":")) {
  39                 size_t len = strlen(editor);
  40                 int i = 0;
  41                 int failed;
  42                 const char *args[6];
  43                 struct strbuf arg0 = STRBUF_INIT;
  44
  45                 if (strcspn(editor, "|&;<>()$`\\\"' \t\n*?[#~=%") != len) {
  46                         /* there are specials */
  47                         strbuf_addf(&arg0, "%s \"$@\"", editor);
  48                         args[i++] = "sh";
  49                         args[i++] = "-c";
  50                         args[i++] = arg0.buf;
  51                 }
  52                 args[i++] = editor;
  53                 args[i++] = path;
  54                 args[i] = NULL;
  55
  56                 failed = run_command_v_opt_cd_env(args, 0, NULL, env);
  57                 strbuf_release(&arg0);
  58                 if (failed)
  59                         return error("There was a problem with the editor '%s'.",
  60                                         editor);
  61         }
  62
  63         if (!buffer)
  64                 return 0;
  65         if (strbuf_read_file(buffer, path, 0) < 0)
  66                 return error("could not read file '%s': %s",
  67                                 path, strerror(errno));
  68         return 0;
  69 }