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docker/generate-stackbrew-library.sh

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#!/bin/bash
set -Eeuo pipefail
declare -A release_channel=(
[stable]=$( cat latest.txt )
)
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self="$(basename "${BASH_SOURCE[0]}")"
cd "$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
# Get the most recent commit which modified any of "$@".
fileCommit() {
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commit="$(git log -1 --format='format:%H' HEAD -- "$@")"
if [ -z "$commit" ]; then
# return some valid sha1 hash to make bashbrew happy
echo '0000000000000000000000000000000000000000'
else
echo "$commit"
fi
}
# Get the most recent commit which modified "$1/Dockerfile" or any file that
# the Dockerfile copies into the rootfs (with COPY).
dockerfileCommit() {
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local dir="$1"; shift
(
cd "$dir";
fileCommit Dockerfile \
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$(awk '
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toupper($1) == "COPY" {
for (i = 2; i < NF; i++)
print $i;
}
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' Dockerfile)
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)
}
getArches() {
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local repo="$1"; shift
local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
eval "declare -g -A parentRepoToArches=( $(
find -maxdepth 3 -name 'Dockerfile' -exec awk '
toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|microsoft\/[^:]+)(:|$)/ {
print "'"$officialImagesUrl"'" $2
}
' '{}' + \
| sort -u \
| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
) )"
}
getArches 'friendica'
# Header.
cat <<-EOH
# This file is generated via https://github.com/friendica/docker/blob/$(fileCommit "$self")/$self
2018-12-13 20:17:18 +01:00
Maintainers: Friendica <info@friendi.ca> (@friendica), Philipp Holzer <admin@philipp.info> (@nupplaphil)
GitRepo: https://github.com/friendica/docker.git
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GitFetch: refs/heads/stable
EOH
# prints "$2$1$3$1...$N"
join() {
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local sep="$1"; shift
local out; printf -v out "${sep//%/%%}%s" "$@"
echo "${out#$sep}"
}
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latest=$( cat latest.txt )
develop=$( cat develop.txt )
# Generate each of the tags.
versions=( */ )
versions=( "${versions[@]%/}" )
for version in "${versions[@]}"; do
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variants=( $version/*/ )
variants=( $(for variant in "${variants[@]%/}"; do
basename "$variant"
done) )
for variant in "${variants[@]}"; do
commit="$(dockerfileCommit "$version/$variant")"
versionAliases=( )
versionPostfix=""
versionAliases+=( "$version$versionPostfix" )
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if [ "$version" = "$latest" ]; then
versionAliases+=( "latest" )
fi
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if [[ "$version" == *-rc ]]; then
versionAliases+=( "rc" )
fi
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if [[ "$version" == "$develop" ]]; then
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versionAliases+=( "dev" )
fi
for channel in "${!release_channel[@]}"; do
if [ "$version" = "${release_channel[$channel]}" ]; then
versionAliases+=( "$channel" )
fi
done
variantAliases=( "${versionAliases[@]/%/-$variant}" )
variantAliases=( "${variantAliases[@]//latest-}" )
if [ "$variant" = "apache" ]; then
variantAliases+=( "${versionAliases[@]}" )
fi
variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$version/$variant/Dockerfile")"
# shellcheck disable=SC2154
variantArches="${parentRepoToArches[$variantParent]}"
cat << EOE
Tags: $(join ', ' "${variantAliases[@]}")
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Architectures: $(join ', ' $variantArches)
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GitCommit: $commit
Directory: $version/$variant
EOE
done
done