Fix default ignore for vim temporary files

.swp files are created by vim to store editing state while a file is
open. However, it may also create .swo, .swn, etc files if .swp already
exists. Also, the temporary files are always hidden (start with ".").
Finally, vim temporarily creates .swpx files as well which are caught by
inotify.

This change fixes the *.swp pattern to only match hidden files and to
match the other vim temporary files.

doc/watchexec.1

@@ -71,7 +71,7 @@ Skip loading of version control system (VCS) ignore files\. By default, watchexe
 .
 .TP
 \fB\-\-no\-default\-ignore\fR
-Skip default ignore statements\. By default, watchexec ignores common temporary files for you, for example \fB*\.swp\fR, \fB*\.pyc\fR, and \fB\.DS_Store\fR
+Skip default ignore statements\. By default, watchexec ignores common temporary files for you, for example \fB.*\.swp\fR, \fB*\.pyc\fR, and \fB\.DS_Store\fR
 .
 .SH "ENVIRONMENT"
 Processes started by watchexec have the \fB$WATCHEXEC_UPDATED_PATH\fR environment variable set to the path of the first modification observed\. In addition, the \fB$WATCHEXEC_COMMON_PATH\fR environment variable is set to the common path of all observed modifications\.

src/cli.rs

@@ -147,7 +147,8 @@ pub fn get_args() -> Args {
     let mut ignores = vec![];
     let default_ignores = vec![format!("**{}.DS_Store", MAIN_SEPARATOR),
                                String::from("*.pyc"),
-                               String::from("*.swp"),
+                               String::from(".*.sw?"),
+                               String::from(".*.sw?x"),
                                format!("**{}.git{}**", MAIN_SEPARATOR, MAIN_SEPARATOR),
                                format!("**{}.hg{}**", MAIN_SEPARATOR, MAIN_SEPARATOR),
                                format!("**{}.svn{}**", MAIN_SEPARATOR, MAIN_SEPARATOR)];