feat(watchexec): ✨ Add an example of watchexec.

Author: chrisguest75

59_monitor_folder/README.md

@@ -2,10 +2,6 @@
 
 Demonstrate how to monitor a folder for changes using `inotify` or `watchman`.  
 
-TODO:
-
-* add watchexec example
-
 ## Reason
 
 It's a common requirement that a process needs to monitor the output of another process via the filesystem.  File notification systems are generally OS specific.  
@@ -16,6 +12,7 @@ It's a common requirement that a process needs to monitor the output of another
 (./inotify/README.md)  
 * Demonstrate how to monitor a folder for changes using `watchman` [here]
 (./watchman/README.md)  
+* Demonstrate how to use [watchexec](./watchexec/README.md)
 
 ## Resources
 

59_monitor_folder/watchexec/README.md

@@ -0,0 +1,22 @@
+# WATCHEXEC
+
+Demonstrate how to monitor a folder for changes using `watchexec`.  
+
+## Install
+
+```sh
+just nix
+```
+
+## Trigger
+
+```sh
+watchexec --exts md cat README.md
+#or
+just cat
+```
+
+## Resources
+
+* watchexec [here](https://watchexec.github.io/)
+* watchexec/watchexec repo [here](https://github.com/watchexec/watchexec)

59_monitor_folder/watchexec/justfile

@@ -0,0 +1,15 @@
+#!/usr/bin/env just --justfile
+# ^ A shebang isn't required, but allows a justfile to be executed
+#   like a script, with `./justfile test`, for example.
+
+set dotenv-load := true
+
+# default lists actions
+default:
+  @just -f {{ source_file() }} --list
+
+nix:
+  @nix-shell -p watchexec --command zsh
+
+cat:
+  @watchexec --exts md cat README.md

TODO.md

@@ -1,6 +1,5 @@
 # 📝 TODO
 
-* Watchexec https://github.com/watchexec/watchexec/tree/main/crates/cli#features
 * code=${PIPESTATUS[0]} -- getting pipestatus codes.
 * -- end of options https://www.cyberciti.biz/faq/what-does-double-dash-mean-in-ssh-command  
 * fold command - wrap line lengths.