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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=(
[3-7-rc]='rc'
[3.6]='3 latest'
[2.7]='2'
)
self="$(basename "$BASH_SOURCE")"
cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
versions=( */ )
versions=( "${versions[@]%/}" )
# 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 $i
}
}
')
)
}
cat <<-EOH
# this file is generated via https://github.com/docker-library/python/blob/$(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
commit="$(dirCommit "$version")"
fullVersion="$(git show "$commit":"$version/Dockerfile" | awk '$1 == "ENV" && $2 == "PYTHON_VERSION" { print $3; exit }')"
versionAliases=(
$fullVersion
$version
${aliases[$version]:-}
)
echo
cat <<-EOE
Tags: $(join ', ' "${versionAliases[@]}")
GitCommit: $commit
Directory: $version
EOE
for v in \
slim alpine wheezy onbuild \
windows/windowsservercore windows/nanoserver \
; do
dir="$version/$v"
variant="$(basename "$v")"
[ -f "$dir/Dockerfile" ] || continue
commit="$(dirCommit "$dir")"
variantAliases=( "${versionAliases[@]/%/-$variant}" )
variantAliases=( "${variantAliases[@]//latest-/}" )
echo
cat <<-EOE
Tags: $(join ', ' "${variantAliases[@]}")
GitCommit: $commit
Directory: $dir
EOE
[ "$variant" = "$v" ] || echo "Constraints: $variant"
done
done