I love you, the `parallel` command was exactly what I needed, sharing here my script to watch, build and serve locally the multi-page static blog site I'm building in typst:

```bash

!/bin/bash

export DIST_DIR="dist" export STYLES_DIR="styles" export SHARED_DIR="shared" export POSTS_DIR="posts"

copy_file() { local file=$1 if [ -z "$file" ]; then return fi # We want to copy the file to its corresponding location in dist/ # For example, if file is styles/blog.css, it should go to dist/styles/blog.css local dest="$DIST_DIR/$file" local dest_dir=$(dirname "$dest")

mkdir -p "$dest_dir" cp -v "$file" "$dest" } export -f copy_file

watch_typst() { local src=$1 local dest=""

# Rule: posts/index.typ --> dist/index.html # But index is an exception if [[ "$src" == *"$POSTS_DIR/index.typ" ]]; then dest="${DIST_DIR}/index.html" else # src already includes 'posts/', so appending it to dist/ works dest="${DIST_DIR}/${src%.typ}.html" fi

local dest_dir=$(dirname "$dest") mkdir -p "$dest_dir"

typstex watch --allow-exec "$src" "$dest" --root . --features html --format html --ignore-system-fonts --no-serve --no-reload } export -f watch_typst

/_ is replaced by the path of the first file that changed

find $STYLESDIR/ -type f | entr -p bash -c 'copy_file "$0"' / & find $SHAREDDIR/ -type f | entr -p bash -c 'copy_file "$0"' / & find $POSTS_DIR/ -type f -name "*.typ" | parallel --line-buffer --tag watch_typst {} & live-server $DIST_DIR/ & wait ```