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generate-stackbrew-library.sh
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generate-stackbrew-library.sh
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#!/bin/bash
set -eu
declare -A aliases=(
[8-jdk]='jdk latest'
[8-jre]='jre'
)
defaultType='jdk'
image="${1:-openjdk}"
self="$(basename "$BASH_SOURCE")"
cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
versions=( */ )
versions=( "${versions[@]%/}" )
# sort version numbers with highest first
IFS=$'\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"
fileCommit \
Dockerfile \
$(git show HEAD:./Dockerfile | awk '
toupper($1) == "COPY" {
for (i = 2; i < NF; i++) {
print $i
}
}
')
)
}
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|microsoft\/[^:]+)(:|$)/ {
print "'"$officialImagesUrl"'" $2
}
' '{}' + \
| sort -u \
| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
) )"
}
getArches 'openjdk'
cat <<-EOH
# this file is generated via https://github.com/docker-library/openjdk/blob/$(fileCommit "$self")/$self
Maintainers: Tianon Gravi <[email protected]> (@tianon),
Joseph Ferguson <[email protected]> (@yosifkit)
GitRepo: https://github.com/docker-library/openjdk.git
EOH
# prints "$2$1$3$1...$N"
join() {
local sep="$1"; shift
local out; printf -v out "${sep//%/%%}%s" "$@"
echo "${out#$sep}"
}
aliases() {
local javaVersion="$1"; shift
local javaType="$1"; shift
local fullVersion="$1"; shift
local variants=( "$@" )
local bases=()
while [ "${fullVersion%[.-]*}" != "$fullVersion" ]; do
bases+=( $fullVersion )
fullVersion="${fullVersion%[.-]*}"
done
bases+=( $fullVersion )
if [ "$javaVersion" != "$fullVersion" ]; then
bases+=( $javaVersion )
fi
local versionAliases=()
for base in "${bases[@]}"; do
versionAliases+=( "$base-$javaType" )
if [ "$javaType" = "$defaultType" ]; then
versionAliases+=( "$base" )
fi
done
# generate "openjdkPrefix" before adding aliases ("latest") so we avoid tags like "openjdk-latest"
local openjdkPrefix=( "${versionAliases[@]/#/openjdk-}" )
# add aliases and the prefixed versions (so the silly prefix versions come dead last)
versionAliases+=( ${aliases[$javaVersion-$javaType]:-} )
if [ "$image" = 'java' ]; then
# add "openjdk" prefixes (these should stay very last so their use is properly discouraged)
versionAliases+=( "${openjdkPrefix[@]}" )
fi
local variantAliases=()
local variant
for variant in "${variants[@]}"; do
if [ -n "$variant" ]; then
local thisVariantAliases=( "${versionAliases[@]/%/-$variant}" )
variantAliases+=( "${thisVariantAliases[@]//latest-/}" )
else
variantAliases+=( "${versionAliases[@]}" )
fi
done
versionAliases=( "${variantAliases[@]}" )
echo "${versionAliases[@]}"
}
for version in "${versions[@]}"; do
javaVersion="$version" # "7-jdk"
javaType="${javaVersion##*-}" # "jdk"
javaVersion="${javaVersion%-$javaType}" # "7"
for v in \
'' slim alpine \
windows/windowsservercore-{ltsc2016,1709} \
windows/nanoserver-{sac2016,1709} \
; do
dir="$version${v:+/$v}"
[ -n "$v" ] && variant="$(basename "$v")" || variant=
[ -f "$dir/Dockerfile" ] || continue
commit="$(dirCommit "$dir")"
fullVersion="$(git show "$commit":"$dir/Dockerfile" | awk '$1 == "ENV" && $2 == "JAVA_VERSION" { gsub(/[~+]/, "-", $3); print $3; exit }')"
case "$v" in
windows/*) variantArches='windows-amd64' ;;
*)
variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
variantArches="${parentRepoToArches[$variantParent]}"
;;
esac
sharedTags=()
for windowsShared in windowsservercore nanoserver; do
if [[ "$variant" == "$windowsShared"* ]]; then
sharedTags=( $(aliases "$javaVersion" "$javaType" "$fullVersion" "$windowsShared") )
break
fi
done
variantAliases=()
fromTag="$(git show "$commit":"$dir/Dockerfile" | awk -v variant="$variant" '
$1 == "FROM" {
switch ($2) {
case /^microsoft\//:
$2 = ""
break
case /^alpine:/:
gsub(/:/, "", $2) # "alpine3.7", "alpine3.6", etc
break
default:
gsub(/^[^:]+:/, "", $2) # peel off "debian:", "buildpack-deps:", etc
gsub(/-[^-]+$/, "", $2) # peel off "-scm", "-curl", etc
break
}
fromTag = $2
}
$1 == "RUN" && $2 == "echo" && $4 == "http://deb.debian.org/debian" {
fromTag = $5 # "experimental", etc
}
END {
if (fromTag) {
if (variant && fromTag !~ /^alpine/) {
# "slim-stretch", "slim-jessie", etc
printf "%s-", variant
}
print fromTag
}
}
')"
if [ -n "$fromTag" ]; then
variantAliases+=( "$fromTag" )
fi
variantAliases+=( "$variant" )
echo
echo "Tags: $(join ', ' $(aliases "$javaVersion" "$javaType" "$fullVersion" "${variantAliases[@]}"))"
if [ "${#sharedTags[@]}" -gt 0 ]; then
echo "SharedTags: $(join ', ' "${sharedTags[@]}")"
fi
cat <<-EOE
Architectures: $(join ', ' $variantArches)
GitCommit: $commit
Directory: $dir
EOE
[ "$variant" = "$v" ] || echo "Constraints: $variant"
done
done