Watch Path for File Changes and Run Tool on Certain Files

watcher.sh

#!/usr/bin/env bash

# Function to get the absolute path
get_absolute_path() {
    local path="$1"
    if [[ -z "$path" ]]; then
        path="."
    fi
    echo "$(cd "$(dirname "$path")" && pwd)/$(basename "$path")"
}

# Function to process a single file
process_file() {
    local file="$1"
    if [[ "$file" =~ \.ypp\.md$ ]]; then
        source_file="$(basename "$file")"
        target_file="${source_file%.ypp.md}.md"
        command="ypp $source_file -o $target_file"
        echo -n "Running '$command'... "
        TIMEFORMAT='%R seconds'
        time_output=$(eval "time $command" 2>&1)
        echo "done in ${time_output}."
    fi
}

# Function to process existing files
process_existing_files() {
    local dir="$1"
    for file in "$dir"/*.ypp.md; do
        if [ -f "$file" ]; then
            process_file "$file"
        fi
    done
}

# Check if a parameter is provided
if [ $# -eq 0 ]; then
    # No parameter provided, use current directory
    target_path="$(pwd)"
else
    # Parameter provided, get absolute path
    target_path=$(get_absolute_path "$1")
fi

# Check if the path exists
if [ ! -e "$target_path" ]; then
    echo "Error: Path does not exist: $target_path"
    exit 1
fi

# Use the path
echo "Working with path: $target_path"

# Process existing files
process_existing_files "$target_path"

# Watch for file changes
inotifywait --monitor --event close_write --format '%w%f' "$target_path" | while read file
do
    process_file "$file"
done