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generate-stackbrew-library.sh
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generate-stackbrew-library.sh
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#!/usr/bin/env bash
set -Eeuo pipefail
declare -A aliases=(
[1.23]='1 latest'
)
self="$(basename "$BASH_SOURCE")"
cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
if [ "$#" -eq 0 ]; then
versions="$(jq -r 'keys | map(@sh) | join(" ")' versions.json)"
eval "set -- $versions"
fi
# sort version numbers with highest first
IFS=$'\n'; set -- $(sort -rV <<<"$*"); unset IFS
# get the most recent commit which modified any of "$@"
fileCommit() {
git log -1 --format='format:%H' HEAD -- "$@"
}
# get the most recent commit which modified "$1/Dockerfile" or any file COPY'd from "$1/Dockerfile"
dirCommit() {
local dir="$1"; shift
(
cd "$dir"
files="$(
git show HEAD:./Dockerfile | awk '
toupper($1) == "COPY" {
for (i = 2; i < NF; i++) {
if ($i ~ /^--from=/) {
next
}
print $i
}
}
'
)"
fileCommit Dockerfile $files
)
}
getArches() {
local repo="$1"; shift
local officialImagesUrl='https://github.com/docker-library/official-images/raw/master/library/'
eval "declare -g -A parentRepoToArches=( $(
find -name 'Dockerfile' -exec awk '
toupper($1) == "FROM" && $2 !~ /^('"$repo"'|scratch|.*\/.*)(:|$)/ {
print "'"$officialImagesUrl"'" $2
}
' '{}' + \
| sort -u \
| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
) )"
}
getArches 'golang'
cat <<-EOH
# this file is generated via https://github.com/docker-library/golang/blob/$(fileCommit "$self")/$self
Maintainers: Tianon Gravi <admwiggin@gmail.com> (@tianon),
Joseph Ferguson <yosifkit@gmail.com> (@yosifkit),
Johan Euphrosine <proppy@google.com> (@proppy)
GitRepo: https://github.com/docker-library/golang.git
Builder: buildkit
EOH
# prints "$2$1$3$1...$N"
join() {
local sep="$1"; shift
local out; printf -v out "${sep//%/%%}%s" "$@"
echo "${out#$sep}"
}
for version; do
export version
variants="$(jq -r '.[env.version].variants | map(@sh) | join(" ")' versions.json)"
eval "variants=( $variants )"
versionAliases=(
$version
${aliases[$version]:-}
)
defaultDebianVariant="$(jq -r '
.[env.version].variants
| map(select(
startswith("alpine")
or startswith("slim-")
or startswith("windows/")
| not
))
| .[0]
' versions.json)"
defaultAlpineVariant="$(jq -r '
.[env.version].variants
| map(select(
startswith("alpine")
))
| .[0]
' versions.json)"
for v in "${variants[@]}"; do
dir="$version/$v"
[ -f "$dir/Dockerfile" ] || continue
variant="$(basename "$v")"
fullVersion="$(jq -r '.[env.version].version' versions.json)"
[[ "$fullVersion" == *.*[^0-9]* ]] || fullVersion+='.0'
if [ "$version" = "$fullVersion" ]; then
baseAliases=( "${versionAliases[@]}" )
else
baseAliases=( $fullVersion "${versionAliases[@]}" )
fi
variantAliases=( "${baseAliases[@]/%/-$variant}" )
variantAliases=( "${variantAliases[@]//latest-/}" )
if [ "$variant" = "$defaultAlpineVariant" ]; then
variantAliases+=( "${baseAliases[@]/%/-alpine}" )
variantAliases=( "${variantAliases[@]//latest-/}" )
fi
case "$v" in
windows/*)
variantArches='windows-amd64'
;;
*)
variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile" | sort -u)" # TODO this needs to handle multi-parents (we get lucky that they're the same)
variantArches="${parentRepoToArches[$variantParent]}"
;;
esac
# cross-reference with supported architectures
for arch in $variantArches; do
if ! jq -e --arg arch "$arch" '.[env.version].arches[$arch].supported' versions.json &> /dev/null; then
variantArches="$(sed <<<" $variantArches " -e "s/ $arch / /g")"
fi
done
# TODO rewrite this whole loop into a single jq expression :)
variantArches="${variantArches% }"
variantArches="${variantArches# }"
if [ -z "$variantArches" ]; then
echo >&2 "error: '$dir' has no supported architectures!"
exit 1
fi
sharedTags=()
for windowsShared in windowsservercore nanoserver; do
if [[ "$variant" == "$windowsShared"* ]]; then
sharedTags=( "${baseAliases[@]/%/-$windowsShared}" )
sharedTags=( "${sharedTags[@]//latest-/}" )
break
fi
done
if [ "$variant" = "$defaultDebianVariant" ] || [[ "$variant" == 'windowsservercore'* ]]; then
sharedTags+=( "${baseAliases[@]}" )
fi
constraints=
if [ "$variant" != "$v" ]; then
constraints="$variant"
if [[ "$variant" == nanoserver-* ]]; then
# nanoserver variants "COPY --from=...:...-windowsservercore-... ..."
constraints+=", windowsservercore-${variant#nanoserver-}"
fi
fi
commit="$(dirCommit "$dir")"
echo
echo "Tags: $(join ', ' "${variantAliases[@]}")"
if [ "${#sharedTags[@]}" -gt 0 ]; then
echo "SharedTags: $(join ', ' "${sharedTags[@]}")"
fi
cat <<-EOE
Architectures: $(join ', ' $variantArches)
GitCommit: $commit
Directory: $dir
EOE
if [ -n "$constraints" ]; then
echo 'Builder: classic'
echo "Constraints: $constraints"
fi
done
done