docs/hello-world/update.sh

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#!/bin/bash
set -eo pipefail
docker pull hello-world &> /dev/null
exec > "$(dirname "$(readlink -f "$BASH_SOURCE")")/content.md"
echo '# Example output'
echo
{
echo '$ docker run hello-world'
docker run --rm hello-world
echo
echo '$ docker images hello-world'
docker images hello-world | awk -F' +' '$2 == "TAG" || $2 == "latest" { print $1"\t"$2"\t"$3"\t"$5 }' | column -t -s$'\t'
} | sed 's/^/\t/'
echo
echo '%%LOGO%%'
echo
cat <<'EOF'
# How is this image created?
This image is a prime example of using the [`scratch`](https://registry.hub.docker.com/_/scratch/) image effectively. See [`hello.asm`](%%GITHUB-REPO%%/blob/master/hello.asm) in %%GITHUB-REPO%% for the source code of the `hello` binary included in this image.
EOF