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                 const char *args[] = { editor, path, NULL };
  40                 struct child_process p;
  41
  42                 memset(&p, 0, sizeof(p));
  43                 p.argv = args;
  44                 p.env = env;
  45                 p.use_shell = 1;
  46                 if (start_command(&p) < 0)
  47                         return error("unable to start editor '%s'", editor);
  48
  49                 if (finish_command(&p))
  50                         return error("There was a problem with the editor '%s'.",
  51                                         editor);
  52         }
  53
  54         if (!buffer)
  55                 return 0;
  56         if (strbuf_read_file(buffer, path, 0) < 0)
  57                 return error("could not read file '%s': %s",
  58                                 path, strerror(errno));
  59         return 0;
  60 }