2 * (C) Copyright 2008 Jeremy Maitin-Shepard
4 * Use, modification, and distribution are subject to the terms specified in the
10 define_variable("editor_shell_command", getenv("VISUAL") || getenv("EDITOR") || "emacs",
11 "Shell command used to invoke an external editor.\n" +
12 "This defaults to the value of the EDITOR environment variable. If " +
13 "`run_external_editor_function' is non-null, it is used instead to " +
14 "invoke an external editor and the value of this variable is ignored." +
15 "It is used as part of a shell command in the following two ways:\n" +
16 "<editor_shell_command> <file>\n" +
17 "<editor_shell_command> +<line> <file>");
20 define_variable("run_external_editor_function", null,
21 "Coroutine function called to invoke an external editor.\n" +
22 "If this variable is set to a function, it is used to invoke "+
23 "an external editor in place of `editor_shell_command'. It "+
24 "is called with the filename as the first argument, and "+
25 "optionally the boolean keyword argument $temporary specifying "+
26 "whether the file should be deleted after the editor is closed, "+
27 "and optionally the keyword argument $line specifying a line "+
28 "number to display. The `create_external_editor_launcher' "+
29 "function may be convenient for generating a function suitable "+
30 "for use as the value of this variable.");
32 define_keyword("$temporary", "$line");
33 function open_file_with_external_editor (file) {
36 if (run_external_editor_function) {
37 yield run_external_editor_function(file, forward_keywords(arguments));
41 var line = arguments.$line;
43 var cmd = editor_shell_command + " ";
45 cmd += "+" + line + " ";
46 cmd += "\"" + shell_quote(file.path) + "\"";
49 yield shell_command(cmd);
51 if (arguments.$temporary) {
53 file.remove(false /* not recursive */);
59 function create_external_editor_launcher (program, args) {
60 return function (file) {
62 var arr = [null].concat(args.slice());
63 if (arguments.$line != null)
64 arr.push("+" + arguments.$line);
67 yield spawn_and_wait_for_process(program, arr);
69 if (arguments.$temporary) {
78 function open_with_external_editor (lspec) {
80 let [file, temp] = yield download_as_temporary(lspec);
81 yield open_file_with_external_editor(file, $line = arguments.$line, $temporary = temp);
84 provide("external-editor");