coder

#!/bin/bash

# Check if a filename is provided
if [ -z "$1" ]; then
  echo "Error: No filename provided"
  echo "USAGE: coder filename.ext"
  echo "ext = { .py | .c | .cpp | .java | .js | .sh | .rs | .rb | .awk }"
  exit 1
fi

# Get the file extension
ext=${1##*.}

# Get the file name without the extension
name=${1%.*}

# Write a runner code to the file based on the extension
case "$ext" in
  py)
    # Python
    echo '#!/usr/bin/env python3' > "$1"
    echo 'print("Hello World!")' >> "$1"
    ;;
  c)
    # C
    echo '#include <stdio.h>' > "$1"
    echo '#include <stdlib.h>' >> "$1"
    echo '' >> "$1"
    echo 'int main(int argc, char **argv)' >> "$1"
    echo '{' >> "$1"
    echo '	printf("Hello World!\n");' >> "$1"
    echo '	return 0;' >> "$1"
    echo '}' >> "$1"
    ;;
  cpp)
    # C++
    echo '#include <iostream>' > "$1"
    echo 'using namespace std;' >> "$1"
    echo '' >> "$1"
    echo 'int main(int argc, char **argv)' >> "$1"
    echo '{' >> "$1"
    echo '	cout << "Hello World!" << endl;' >> "$1"
    echo '	return 0;' >> "$1"
    echo '}' >> "$1"
    ;;
  java)
    # Java
    echo "public class $name {" > "$1"
    echo '	public static void main(String[] args) {' >> "$1"
    echo '		System.out.println("Hello World!");' >> "$1"
    echo '	}' >> "$1"
    echo '}' >> "$1"
    ;;
  js)
    # JavaScript
    echo '#!/usr/bin/env node' > "$1"
    echo 'console.log("Hello World!");' >> "$1"
    ;;
  sh)
    # Bash
    echo '#!/bin/bash' > "$1"
    echo 'echo "Hello World!"' >> "$1"
    ;;
  rs)
    # Rust
    echo 'fn main() {' > "$1"
    echo '	println!("Hello World!");' >> "$1"
    echo '}' >> "$1"
    ;;
  rb)
    # Ruby
    echo '#!/usr/bin/env ruby' > "$1"
    echo 'puts "Hello World!"' >> "$1"
    ;;
  awk)
    # Awk
    echo '#!/usr/bin/awk -f' > "$1"
    echo 'BEGIN {' >> "$1"
    echo '	print "Hello World!"' >> "$1"
    echo '}' >> "$1"
    ;;
  *)
    # Unrecognized extension
    echo "Error: Unrecognized file extension: $ext"
    exit 1
    ;;
esac