localenv

#!/bin/sh
# Copyright (c) 2024 Benjamin Holt -- MIT License

set -eo pipefail
# set -x  # Uncomment for debugging

# Why doesn't /usr/bin/env have a -f option??
if [ -z "$1" -o "$1" == "-h" -o "$1" == "--help" ]; then
    cat <<USAGE
Usage:  localenv [-f FILE] <command>
    This will run load environment variables from a file and run the command.
    FILE defaults to 'local.env' or '.env' whichever is found first.
    Warning: there may be issues with quoting and escaping of the command or
    its arguments.
USAGE
    exit 0
fi

if [ "$1" == "-f" ]; then
    DotEnv="$2"
    shift; shift
else
    for f in "local.env" ".env"; do
        if [ -f "$f" ]; then
            DotEnv="$f"
            break
        fi
    done
fi

if [ -z "$DotEnv" ]; then
    echo "No environment file found; specify one with -f or run with -h for help" >&2
    exit 1
fi

if [ ! -f "$DotEnv" ]; then
    echo "Environment file '$DotEnv' not found" >&2
    exit 1
fi

# Strip #-style comments and blank lines, then run the remaining lines with 'export'
`cat "$DotEnv" | sed -e 's/  *#.*//' -e '/^#.*/d' -e '/^ *$/d' -e 's/^/export /'`
$@  # Run remaining args as a command