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#!/usr/bin/env bash
set -Eeuo pipefail
declare -A aliases=(
[3.10-rc]='rc'
[3.9]='3 latest'
)
defaultDebianSuite='buster' # TODO buster
declare -A debianSuites=(
#[3.8-rc]='buster'
)
defaultAlpineVersion='3.12'
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|.*\/.*)(:|$)/ {
print "'"$officialImagesUrl"'" $2
}
' '{}' + \
| sort -u \
| xargs bashbrew cat --format '[{{ .RepoName }}:{{ .TagName }}]="{{ join " " .TagEntry.Architectures }}"'
) )"
}
getArches 'python'
cat <<-EOH
# this file is generated via https://github.com/docker-library/python/blob/$(fileCommit "$self")/$self
Maintainers: Tianon Gravi <admwiggin@gmail.com> (@tianon),
Joseph Ferguson <yosifkit@gmail.com> (@yosifkit)
GitRepo: https://github.com/docker-library/python.git
EOH
# prints "$2$1$3$1...$N"
join() {
local sep="$1"; shift
local out; printf -v out "${sep//%/%%}%s" "$@"
echo "${out#$sep}"
}
for version in "${versions[@]}"; do
rcVersion="${version%-rc}"
for v in \
{buster,stretch}{,/slim} \
alpine{3.12,3.11} \
windows/windowsservercore-{1809,ltsc2016} \
; do
dir="$version/$v"
variant="$(basename "$v")"
if [ "$variant" = 'slim' ]; then
# convert "slim" into "slim-jessie"
# https://github.com/docker-library/ruby/pull/142#issuecomment-320012893
variant="$variant-$(basename "$(dirname "$v")")"
fi
[ -f "$dir/Dockerfile" ] || continue
commit="$(dirCommit "$dir")"
fullVersion="$(git show "$commit":"$dir/Dockerfile" | awk '$1 == "ENV" && $2 == "PYTHON_VERSION" { print $3; exit }')"
versionAliases=(
$fullVersion
$version
${aliases[$version]:-}
)
variantAliases=( "${versionAliases[@]/%/-$variant}" )
debianSuite="${debianSuites[$version]:-$defaultDebianSuite}"
case "$variant" in
*-"$debianSuite") # "slim-stretch", etc need "slim"
variantAliases+=( "${versionAliases[@]/%/-${variant%-$debianSuite}}" )
;;
"alpine${defaultAlpineVersion}")
variantAliases+=( "${versionAliases[@]/%/-alpine}" )
;;
esac
variantAliases=( "${variantAliases[@]//latest-/}" )
case "$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=( "${versionAliases[@]/%/-$windowsShared}" )
sharedTags=( "${sharedTags[@]//latest-/}" )
break
fi
done
if [ "$variant" = "$debianSuite" ] || [[ "$variant" == 'windowsservercore'* ]]; then
sharedTags+=( "${versionAliases[@]}" )
fi
echo
echo "Tags: $(join ', ' "${variantAliases[@]}")"
if [ "${#sharedTags[@]}" -gt 0 ]; then
echo "SharedTags: $(join ', ' "${sharedTags[@]}")"
fi
cat <<-EOE
Architectures: $(join ', ' $variantArches)
GitCommit: $commit
Directory: $dir
EOE
[[ "$v" == windows/* ]] && echo "Constraints: $variant"
done
done