Bash utility daemon watched files changes and transpiling them.
It is common task to recompile code bundle on changes or transpile from one language to another.
For example:
- JSX to JS
- coffee script to JS
- flac to mp3, aac, etc
- png to webp, jpeg2000, jpeg xr
- less to css
and others.
In order to use utility you have to markup your code structure and configure transpiling rules.
Run daemon by /path/to/transpiling-watcher/watcher.sh /path/to/your/code. Assumed that /path/to/your/code is path to your code repository you are wanted to watch.
Inside /path/to/your/code directory or inside it's subdirectories you have to create .watch files in order to define transpiling rules for files inside this directory or it's subdirectories. File changes inside directories without .watch file or it's ancestor directories will be ignored.
Example:
flac: ffmpeg -i {} %w/%f.aac
less: node my-less-transpiler.js {} >%w/../../output/%f.css
jsx: /usr/local/bin/jsx-compiler.sh {} >%w/compiled/%f.js
In .watch file you define transpile rule one per line. Transpiling rule is just a shell command followed by file extension and : char as separator.
In order to supply transpiling script with content you can use {} construction that will be replaced with full path to changed file. Also you can use %w construction that will be replaced with directory path for changed file. %f construction for filename without extension and %fe for filename with extension.
-- HTH, enjoy :)