Insertion shell script for prepending text to a file

prepend.sh

#!/usr/bin/env sh
#
# Prepend the text from file in argument $1 to file in argument $2
#
#
# Usage, inserting license front matter into all Python files in a directory,
# including subdirectories:
#
# find . -name "*.py" -print0 | xargs -0 -n 1 ./prepend.sh frontmatter.txt

FRONTMATTER=$(cat $1)
CODEFILE=$(cat $2)

echo "$FRONTMATTER\n\n$CODEFILE" > $2