editor.c

   1 #include "cache.h"
   2 #include "strbuf.h"
   3 #include "run-command.h"
   4
   5 void launch_editor(const char *path, struct strbuf *buffer, const char *const *env)
   6 {
   7         const char *editor, *terminal;
   8
   9         editor = getenv("GIT_EDITOR");
  10         if (!editor && editor_program)
  11                 editor = editor_program;
  12         if (!editor)
  13                 editor = getenv("VISUAL");
  14         if (!editor)
  15                 editor = getenv("EDITOR");
  16
  17         terminal = getenv("TERM");
  18         if (!editor && (!terminal || !strcmp(terminal, "dumb"))) {
  19                 fprintf(stderr,
  20                 "Terminal is dumb but no VISUAL nor EDITOR defined.\n"
  21                 "Please supply the message using either -m or -F option.\n");
  22                 exit(1);
  23         }
  24
  25         if (!editor)
  26                 editor = "vi";
  27
  28         if (strcmp(editor, ":")) {
  29                 size_t len = strlen(editor);
  30                 int i = 0;
  31                 const char *args[6];
  32                 struct strbuf arg0;
  33
  34                 strbuf_init(&arg0, 0);
  35                 if (strcspn(editor, "$ \t'") != len) {
  36                         /* there are specials */
  37                         strbuf_addf(&arg0, "%s \"$@\"", editor);
  38                         args[i++] = "sh";
  39                         args[i++] = "-c";
  40                         args[i++] = arg0.buf;
  41                 }
  42                 args[i++] = editor;
  43                 args[i++] = path;
  44                 args[i] = NULL;
  45
  46                 if (run_command_v_opt_cd_env(args, 0, NULL, env))
  47                         die("There was a problem with the editor %s.", editor);
  48                 strbuf_release(&arg0);
  49         }
  50
  51         if (!buffer)
  52                 return;
  53         if (strbuf_read_file(buffer, path, 0) < 0)
  54                 die("could not read message file '%s': %s",
  55                     path, strerror(errno));
  56 }