Add --no-process-group flag

cli/src/args.rs

@@ -126,6 +126,9 @@ pub fn get_args() -> Result<(Config, LevelFilter)> {
         .arg(Arg::with_name("no-environment")
                  .help("Do not set WATCHEXEC_*_PATH environment variables for the command")
                  .long("no-environment"))
+        .arg(Arg::with_name("no-process-group")
+                 .help("Do not use a process group when running the command")
+                 .long("no-process-group"))
         .arg(Arg::with_name("once").short("1").hidden(true))
         .arg(Arg::with_name("watch-when-idle")
                  .help("Deprecated alias for --on-busy-update=do-nothing, which will become the default in 2.0.")
@@ -263,6 +266,7 @@ pub fn get_args() -> Result<(Config, LevelFilter)> {
     builder.no_vcs_ignore(args.is_present("no-vcs-ignore"));
     builder.no_ignore(args.is_present("no-ignore"));
     builder.poll(args.occurrences_of("poll") > 0);
+    builder.use_process_group(!args.is_present("no-process-group"));
 
     let mut config = builder.build()?;
     if args.is_present("once") {

cli/tests/snapshots/help__help_unix.snap

@@ -17,6 +17,7 @@ FLAGS:
         --no-environment       Do not set WATCHEXEC_*_PATH environment variables for the command
         --no-ignore            Skip auto-loading of ignore files (.gitignore, .ignore, etc.) for filtering
         --no-meta              Ignore metadata changes
+        --no-process-group     Do not use a process group when running the command
     -n, --no-shell             Do not wrap command in a shell. Deprecated: use --shell=none instead.
         --no-vcs-ignore        Skip auto-loading of .gitignore files for filtering
     -p, --postpone             Wait until first change to execute command
@@ -44,3 +45,4 @@ ARGS:
 
 Use @argfile as first argument to load arguments from the file `argfile` (one argument per line) which will be inserted
 in place of the @argfile (further arguments on the CLI will override or add onto those in the file).
+

cli/tests/snapshots/help__help_windows.snap

@@ -17,6 +17,7 @@ FLAGS:
         --no-environment       Do not set WATCHEXEC_*_PATH environment variables for the command
         --no-ignore            Skip auto-loading of ignore files (.gitignore, .ignore, etc.) for filtering
         --no-meta              Ignore metadata changes
+        --no-process-group     Do not use a process group when running the command
     -n, --no-shell             Do not wrap command in a shell. Deprecated: use --shell=none instead.
         --no-vcs-ignore        Skip auto-loading of .gitignore files for filtering
     -p, --postpone             Wait until first change to execute command

doc/watchexec.1

@@ -1,7 +1,7 @@
 .\" generated with Ronn/v0.7.3
 .\" http://github.com/rtomayko/ronn/tree/0.7.3
 .
-.TH "WATCHEXEC" "1" "April 2021" "" ""
+.TH "WATCHEXEC" "1" "July 2021" "" ""
 .
 .SH "NAME"
 \fBwatchexec\fR \- execute commands when watched files change
@@ -91,6 +91,10 @@ Ignore events while the process is still running\. This is distinct from \fB\-\-
 This behaviour will become the default in v2\.0\.
 .
 .TP
+\fB\-\-no\-process\-group\fR
+Do not use a process group when running \fIcommand\fR\.
+.
+.TP
 \fB\-c\fR, \fB\-\-clear\fR
 Clears the screen before executing \fIcommand\fR\.
 .

doc/watchexec.1.html

@@ -130,6 +130,7 @@
 <p>This behaviour will become the default in v2.0.</p>
 
 <dl>
+<dt><code>--no-process-group</code></dt><dd><p>Do not use a process group when running <var>command</var>.</p></dd>
 <dt><code>-c</code>, <code>--clear</code></dt><dd><p>Clears the screen before executing <var>command</var>.</p></dd>
 <dt><code>-p</code>, <code>--postpone</code></dt><dd><p>Postpone execution of <var>command</var> until the first file modification is detected.</p></dd>
 <dt><code>--force-poll</code> <var>interval</var></dt><dd><p>Poll for changes every <var>interval</var> ms instead of using system-specific notification mechanisms (such as inotify). This is useful when you are monitoring NFS shares.</p></dd>
@@ -220,7 +221,7 @@
 
   <ol class='man-decor man-foot man foot'>
     <li class='tl'></li>
-    <li class='tc'>April 2021</li>
+    <li class='tc'>July 2021</li>
     <li class='tr'>watchexec(1)</li>
   </ol>
 

doc/watchexec.1.ronn

@@ -66,6 +66,9 @@ Ignore events while the process is still running. This is distinct from `--resta
 
 This behaviour will become the default in v2.0.
 
+* `--no-process-group`:
+Do not use a process group when running <command>.
+
 * `-c`, `--clear`:
 Clears the screen before executing <command>.