create_script

#!/bin/bash

# Create script
# This script creates new bash scripts, sets their permission and more
# Author: Tega

# Test if there is an argument
if [[ ! $1 ]]; then
  echo "Missing argument"
  exit 1
fi

scriptname=$1
scriptsdir="${HOME}/Documents/bash_scripting_prac"
filename="${scriptsdir}/${scriptname}"

# Check if the new file already exists in the directory
if [[ -e $filename ]]; then
  echo "File ${filename} already exists"
  exit 1
fi

# Check if the name of the script you provide clashes with the name of an existing command
# redirecting to /dev/null as shown below basically discards the output message so it does not clutter the terminal
# In the case of errors, using 2>&1 redirects from stderr to stdout
if type "$scriptname" > /dev/null 2>&1; then
  echo "There is already a command with name ${scriptname}"
  exit 1
fi

# Check that the directory to save to exists
if [[ ! -d $scriptsdir ]]; then
  # Try to create the directory
  if mkdir "$scriptsdir"; then
    echo "Created ${scriptsdir}"
  else
    echo "Could not create ${scriptsdir}"
    exit 1
  fi
fi

# Create the new script
echo "#!/bin/bash" > "$filename"
# Add executable permission
chmod u+x "$filename"
# Open with editor
if [[ $EDITOR ]]; then
  $EDITOR "$filename"
else
  echo "Script created; editor not started because \$EDITOR is not set."
fi