watchman

#!/bin/bash

# Function to handle the argument
handle_argument() {
    case $1 in
        upstream)
            echo "Watching lambda for upstream..."
            # Add your commands for "upstream" here
            ;;
        midstream)
            echo "Watching lambda for midstream..."
            # Add your commands for "midstream" here
            ;;
        downstream)
            echo "Watching lambda for downstream..."
            # Add your commands for "downstream" here
            ;;
        *)
            echo "Invalid argument. Please provide one of the following arguments: upstream, midstream, downstream."
            exit 1
            ;;
    esac
}

# Function to watch a directory and build the binary on every file change
watch_and_build() {
    # Function name
    FUNC_NAME=$1

    # Watchman configuration
    WATCHMAN_CONFIG=".watchmanconfig"

    # Create a Watchman configuration file if it doesn't exist
    if [ ! -f "$WATCHMAN_CONFIG" ]; then
        echo "{}" > "$WATCHMAN_CONFIG"
    fi

    # Build the binary once before starting the loop
    GOOS=linux GOARCH=amd64 go build -C ./lambda/src/$FUNC_NAME -o ../../dist/$FUNC_NAME/bootstrap
    
    # Start watching the directory
    watchman watch "lambda/src/$FUNC_NAME"

    # Loop indefinitely
    while true; do
        # Wait for changes
        watchman-wait "lambda/src/$FUNC_NAME" -p '*.go'

        # Trigger a build after changes
        sh -c "GOOS=linux GOARCH=amd64 go build -C ./lambda/src/$FUNC_NAME -o ../../dist/$FUNC_NAME/bootstrap && echo 'compilation done'"

        # Add a sleep to allow for easy script exit
        sleep 1
    done
}

# Check if an argument was provided
if [ $# -eq 0 ]; then
    echo "No arguments provided. Please provide one of the following arguments: upstream, midstream, downstream."
    exit 1
fi

# Handle the argument
handle_argument $1

# Watch the directory and build the binary on every file change
watch_and_build $1