editor.c

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