31 lines
1000 B
Bash
Executable File
31 lines
1000 B
Bash
Executable File
#!/bin/bash
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set -Eeuo pipefail
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image="${1:-hello-world}"
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echo hello-world "$image" | timeout 5s xargs -P2 -n1 docker pull &> /dev/null || exit 0
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exec > "$(dirname "$(readlink -f "$BASH_SOURCE")")/content.md"
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echo '# Example output'
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echo
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echo '```console'
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echo '$ docker run %%IMAGE%%'
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docker run --rm hello-world
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echo
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echo '$ docker images %%IMAGE%%'
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docker image ls --format 'table {{ .Repository }}\t{{ .Tag }}\t{{ .ID }}\t{{ .VirtualSize }}' "$image:latest"
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echo '```'
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cat <<'EOF'
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%%LOGO%%
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# How is this image created?
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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.
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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).
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EOF
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