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- #!/bin/bash
- set -Eeuo pipefail
- image="${1:-hello-world}"
- echo hello-world "$image" | timeout 5s xargs -P2 -n1 docker pull &> /dev/null || exit 0
- exec > "$(dirname "$(readlink -f "$BASH_SOURCE")")/content.md"
- echo '# Example output'
- echo
- echo '```console'
- echo '$ docker run %%IMAGE%%'
- docker run --rm hello-world
- echo
- echo '$ docker images %%IMAGE%%'
- docker image ls --format 'table {{ .Repository }}\t{{ .Tag }}\t{{ .ID }}\t{{ .VirtualSize }}' "$image:latest"
- echo '```'
- cat <<'EOF'
- %%LOGO%%
- # How is this image created?
- This image is a prime example of using the [`scratch`](https://hub.docker.com/_/scratch/) image effectively. See [`hello.c`](%%GITHUB-REPO%%/blob/master/hello.c) in %%GITHUB-REPO%% for the source code of the `hello` binary included in this image.
- Because this image consists of nothing but a single static binary which prints some text to standard output, it can trivially be run as any arbitrary user (`docker run --user $RANDOM:$RANDOM %%IMAGE%%`, for example).
- EOF
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