98 lines
2.2 KiB
Bash
Executable File
98 lines
2.2 KiB
Bash
Executable File
#!/bin/bash
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set -eu
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latest=
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# prefer uclibc, but if it's unavailable use glibc if possible since it's got less "edge case" behavior, especially around DNS
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for try in \
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uclibc \
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glibc \
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musl \
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; do
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if [ -d "$try" ]; then
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latest="$try"
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break
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fi
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done
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if [ -z "$latest" ]; then
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echo >&2 'error: cannot determine a good choice for "latest"!'
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exit 1
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fi
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self="$(basename "$BASH_SOURCE")"
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cd "$(dirname "$(readlink -f "$BASH_SOURCE")")"
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variants=( */ )
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variants=( "${variants[@]%/}" )
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# get the most recent commit which modified any of "$@"
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fileCommit() {
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git log -1 --format='format:%H' --branches -- "$@"
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}
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# get the most recent commit which modified "$1/Dockerfile" or any file COPY'd from "$1/Dockerfile"
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dirCommit() {
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local dir="$1"; shift
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(
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cd "$dir"
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dfCommit="$(fileCommit Dockerfile)"
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fileCommit \
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Dockerfile \
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$(git show "$dfCommit":./Dockerfile | awk '
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toupper($1) ~ /^(COPY|ADD)$/ {
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for (i = 2; i < NF; i++) {
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print $i
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}
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}
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')
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)
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}
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cat <<-EOH
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# this file is generated via https://github.com/docker-library/busybox/blob/$(fileCommit "$self")/$self
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Maintainers: Tianon Gravi <admwiggin@gmail.com> (@tianon),
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Joseph Ferguson <yosifkit@gmail.com> (@yosifkit),
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Jérôme Petazzoni <jerome@docker.com> (@jpetazzo)
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GitRepo: https://github.com/docker-library/busybox.git
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GitFetch: refs/heads/dist
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EOH
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# prints "$2$1$3$1...$N"
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join() {
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local sep="$1"; shift
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local out; printf -v out "${sep//%/%%}%s" "$@"
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echo "${out#$sep}"
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}
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for variant in "${variants[@]}"; do
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[ -f "$variant/Dockerfile.builder" ] || continue
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commit="$(dirCommit "$variant")"
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fullVersion="$(git show "$commit":"$variant/Dockerfile.builder" | awk '$1 == "ENV" && $2 == "BUSYBOX_VERSION" { print $3; exit }')"
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versionAliases=()
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while [ "${fullVersion%.*}" != "$fullVersion" ]; do
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versionAliases+=( $fullVersion )
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fullVersion="${fullVersion%.*}"
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done
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versionAliases+=(
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$fullVersion
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latest
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)
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variantAliases=( "${versionAliases[@]/%/-$variant}" )
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variantAliases=( "${variantAliases[@]//latest-/}" )
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if [ "$variant" = "$latest" ]; then
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variantAliases+=( "${versionAliases[@]}" )
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fi
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echo
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cat <<-EOE
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Tags: $(join ', ' "${variantAliases[@]}")
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GitCommit: $commit
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Directory: $variant
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EOE
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done
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