env2fs is a simple script to facilitate the creation of files from environment variables

env2fs.sh

#!/bin/bash -e
#
# env2fs is a simple script to facilitate the creation of files from environment variables

# check for help
if [[ $1 =~ ^--help|^-h ]]
then
    echo "usage: env2fs.sh"
    echo
    echo "env2fs is a simple script to facilitate the creation of files from environment variables."
    echo "Exported environment variables with the following predicate \"ENV2FS_VAR\" are parsed to "
    echo "create files from a path provided in the variable value and data separated by a colon ':'."
    echo ""
    echo "Example: export ENV2FS_VAR1='/tmp/mydir/myfile.out:This is my temporary file with data'"
    echo "This will generate a file at /tmp/mydir/myfile.out"
    echo "with the content: This is my temporary file with data"
    exit 0
fi

VARS=${!ENV2FS_VAR*}

echo $VARS

for var in $VARS; do
    var=$(printf '%s\n' "${!var}")
    IFS=":"
    f=($var)
    new_file=${f[0]}
    data=${f[1]}
    mkdir -vp $(dirname ${new_file})
    echo $data > $new_file
    echo "ENV2FS[INFO]: Created $new_file from environment..."
done