Facilitate single-file compositions by parsing the environment for variables that look like file paths and storing the value of such on the local filesystem.
$ docker run --rm -it -e '/tmp/hello=world' dweomer/env2fs cat /tmp/hello
world
#!/bin/bash
cat - << EOF | docker-compose -f - up
lorem:
command: cat /tmp/lorem
environment:
'/tmp/lorem': |
Lorem Ipsum is simply dummy text of the printing and typesetting industry.
Lorem Ipsum has been the industry's standard dummy text ever since the 1500s,
when an unknown printer took a galley of type and scrambled it to make a type
specimen book. It has survived not only five centuries, but also the leap into
electronic typesetting, remaining essentially unchanged. It was popularised in
the 1960s with the release of Letraset sheets containing Lorem Ipsum passages,
and more recently with desktop publishing software like Aldus PageMaker including
versions of Lorem Ipsum.
image: dweomer/env2fs
EOF