go_live_reload.sh

#!/bin/bash

WATCH_EXTENSIONS=("go" "html" "css")
COLOR='\033[0;35m' # Purple (change this to change the color)
NC='\033[0m' # No Color

PID=""

# Check if inotify-tools is installed and install if not
check_inotify() {
    if ! command -v inotifywait &> /dev/null; then
        echo -e "${COLOR}inotify-tools not found. Installing...${NC}"
        if apt-get update && apt-get install -y inotify-tools; then
            echo -e "${COLOR}inotify-tools installed successfully!${NC}"
        else
            echo -e "${COLOR}Failed to install inotify-tools. This script assumes apt as a package manager. Change the script? ${NC}"
            exit 1
        fi
    else
        echo -e "${COLOR}inotify-tools is already installed.${NC}"
    fi
}

# Kill existing Go process
kill_go() {
    if [ ! -z "$PID" ]; then
        kill $PID 2>/dev/null
        PID=""
    fi
}

# Start Go app
start_go() {
    kill_go
    echo -e "${COLOR}Building and running Go application${NC}"
    # Use go build (go run does not integrate changes in go:embed unless Go code changed)
    go build -o run-bin .
    if [ $? -eq 0 ]; then
        echo -e "${COLOR}Starting Go application${NC}"
        ./run-bin &
        PID=$!
        rm run-bin
    else
        echo -e "${COLOR}Build failed${NC}"
    fi
    
}

# Build the regex pattern from the extensions array
build_pattern() {
    local pattern=""
    for ext in "${WATCH_EXTENSIONS[@]}"; do
        if [ -z "$pattern" ]; then
            pattern="\\.$ext\$"
        else
            pattern="$pattern|\\.$ext\$"
        fi
    done
    echo "$pattern"
}

# Clean on exit
cleanup() {
    kill_go
    if [ -f "run-bin" ]; then
        rm -f run-bin # Remove the binary used
        echo -e "\n" # Add a newline for readability in the terminal
    fi
    exit
}

trap 'cleanup' INT TERM

# Check if ioutils is installed and install it if it is not present
check_inotify

# Show what we're watching
echo -e "${COLOR}Watching for changes in:${NC} ${WATCH_EXTENSIONS[*]}"
echo -e "${COLOR}Press Ctrl+C to stop${NC}"

# Start app initially
start_go

# Build the include pattern
PATTERN=$(build_pattern)

# Watch for file changes and restart
inotifywait -m -r -e modify --include "$PATTERN" . 2>/dev/null | while read path event file; do
    echo -e "${COLOR}File changed: $file${NC}"
    echo -e "${COLOR}Restarting app...${NC}"
    start_go
done