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generate-stackbrew-library.sh
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#!/usr/bin/env bash
set -Eeuo pipefail
declare -A aliases=(
[9.2]='9 latest'
[8.2]='8'
[7.2]='7'
)
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'; versions=( $(echo "${versions[*]}" | 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 HEAD:./Dockerfile.native | awk '
toupper($1) == "COPY" {
for (i = 2; i < NF; i++) {
if ($i ~ /^--from=/) {
next
}
print $i
}
}
'
)"
fileCommit Dockerfile Dockerfile.native $files
)
}
getArches() {
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" && $2 !~ /^(scratch|.*\/.*)(:|$)/ {
print "'"$officialImagesUrl"'" $2
}
' '{}' + \
| sort -u \
| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
) )"
}
getArches
cat <<-EOH
# this file is generated via https://github.com/tianon/docker-qemu/blob/$(fileCommit "$self")/$self
Maintainers: Tianon Gravi <[email protected]> (@tianon)
GitRepo: https://github.com/tianon/docker-qemu.git
EOH
# prints "$2$1$3$1...$N"
join() {
local sep="$1"; shift
local out; printf -v out "${sep//%/%%}%s" "$@"
echo "${out#$sep}"
}
for version; do
fullVersion="$(jq -r --arg version "$version" '.[$version].version' versions.json)"
rcVersion="${version%-rc}"
versionAliases=()
while [ "$fullVersion" != "$rcVersion" -a "${fullVersion%[.]*}" != "$fullVersion" ]; do
versionAliases+=( $fullVersion )
fullVersion="${fullVersion%[.]*}"
done
versionAliases+=(
$version
${aliases[$version]:-}
)
commit="$(dirCommit "$version")"
for variant in '' native; do
variantAliases=( "${versionAliases[@]}" )
if [ -n "$variant" ]; then
variantAliases=( "${variantAliases[@]/%/-$variant}" )
variantAliases=( "${variantAliases[@]//latest-/}" )
fi
variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$version/Dockerfile${variant:+.$variant}")"
suite="${variantParent#*:}" # "buster-slim", "buster"
suite="${suite%-slim}" # "buster"
suiteAliases=( "${variantAliases[@]/%/-$suite}" )
suiteAliases=( "${suiteAliases[@]//latest-/}" )
variantAliases+=( "${suiteAliases[@]}" )
case "$variant" in
'') variantArches='amd64' ;; # only make the "fat" variant on amd64
*) variantArches="${parentRepoToArches[$variantParent]}" ;;
esac
# skip i386 (missing many packages, like libxen-dev; not something I actually care to target)
variantArches="$(sed -e 's/ i386 / /g' <<<" $variantArches ")"
# architectures I don't think make sense to or I don't care to support
variantArches="$(sed -e 's/ arm32v5 / /g' <<<" $variantArches ")"
variantArches="$(sed -e 's/ mips64le / /g' <<<" $variantArches ")"
variantArches="$(sed -e 's/ ppc64le / /g' <<<" $variantArches ")"
variantArches="$(sed -e 's/ s390x / /g' <<<" $variantArches ")"
echo
cat <<-EOE
Tags: $(join ', ' "${variantAliases[@]}")
Architectures: $(join ', ' $variantArches)
GitCommit: $commit
Directory: $version
EOE
if [ -n "$variant" ]; then
echo "File: Dockerfile.$variant"
fi
done
done