editor.c

   1 #include "cache.h"
   2 #include "strbuf.h"
   3 #include "run-command.h"
   4
   5 int 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                 return error("Terminal is dumb but no VISUAL nor EDITOR defined.");
  20
  21         if (!editor)
  22                 editor = "vi";
  23
  24         if (strcmp(editor, ":")) {
  25                 size_t len = strlen(editor);
  26                 int i = 0;
  27                 int failed;
  28                 const char *args[6];
  29                 struct strbuf arg0 = STRBUF_INIT;
  30
  31                 if (strcspn(editor, "$ \t'") != len) {
  32                         /* there are specials */
  33                         strbuf_addf(&arg0, "%s \"$@\"", editor);
  34                         args[i++] = "sh";
  35                         args[i++] = "-c";
  36                         args[i++] = arg0.buf;
  37                 }
  38                 args[i++] = editor;
  39                 args[i++] = path;
  40                 args[i] = NULL;
  41
  42                 failed = run_command_v_opt_cd_env(args, 0, NULL, env);
  43                 strbuf_release(&arg0);
  44                 if (failed)
  45                         return error("There was a problem with the editor '%s'.",
  46                                         editor);
  47         }
  48
  49         if (!buffer)
  50                 return 0;
  51         if (strbuf_read_file(buffer, path, 0) < 0)
  52                 return error("could not read file '%s': %s",
  53                                 path, strerror(errno));
  54         return 0;
  55 }