mirror of
https://github.com/kubernetes-sigs/kustomize.git
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dc7ebef925
Add script to lookup component version from github releases. To sort, we're using sort -V or --version-sort, depending which option is available. This which has some limitations: - pre-releases (-) are sorted as post-releases - post-releases and build metadata (+) are ignored This is the best option available for SemVer sorting without requiring the user to install additional depedencies, like nodejs.
68 lines
2.4 KiB
Bash
Executable File
68 lines
2.4 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Copyright 2024 The Kubernetes Authors.
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# SPDX-License-Identifier: Apache-2.0
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# Looks up and prints the latest release version of the specified component.
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# The first arg should be the component name (tag prefix).
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#
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# Requires GNU sort (or gsort) for version sorting.
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set -euo pipefail
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component="${1:-}"
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if [ -z "${component}" ]; then
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echo >&2 "The first argument should be the requested component name."
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exit 2
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fi
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# Prefer gsort, if installed, to support coreutils install on mac with homebrew.
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if command -v gsort >/dev/null 2>&1; then
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SORT="gsort"
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elif command -v sort >/dev/null 2>&1; then
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SORT="sort"
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else
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echo >&2 "sort (or gsort) required on the PATH for version sorting."
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exit 1
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fi
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# Validate sort has the -V or --version-sort option
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if ${SORT} --help 2>&1 | grep -qe '\-\-version-sort'; then
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# GNU sort & BSD sort have both -V and --version-sort
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# Recent Mac sort has --version-sort, but not -V
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VERSION_FLAG="--version-sort"
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elif ${SORT} --help 2>&1 | grep -qe '^[[:space:]]*\-V[[:space:]]*'; then
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# BusyBox sort has -V but not --version-sort
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VERSION_FLAG="-V"
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else
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# Older Mac sort has neither -V nor --version-sort
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echo >&2 "sort (or gsort) on the PATH must support version sort (-V or --version-sort)."
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if "$(uname)" == "Darwin"; then
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echo >&2 "On Mac, either update the OS or use Homebrew to install the coreutils package, which includes GNU sort as gsort."
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elif "$(uname)" == "Linux"; then
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echo >&2 "On Linux, install the latest version of GNU or BSD sort."
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fi
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exit 1
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fi
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# We can't use /releases/latest because the desired component may not be the
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# last component released.
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RELEASES_URL="https://api.github.com/repos/kubernetes-sigs/kustomize/releases"
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# You can authenticate by exporting the GITHUB_TOKEN in the environment
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if [[ -z "${GITHUB_TOKEN:-}" ]]; then
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RELEASES_JSON=$(curl -s "$RELEASES_URL")
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else
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RELEASES_JSON=$(curl -s "$RELEASES_URL" --header "Authorization: Bearer ${GITHUB_TOKEN}")
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fi
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if [[ "${RELEASES_JSON}" == *"API rate limit exceeded"* ]]; then
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echo "Github rate-limiter failed the request. Either authenticate or wait a couple of minutes."
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exit 1
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fi
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# This would be better with jq, but we're using grep and cut to avoid the
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# dependency, even though it might be more fragile.
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echo "${RELEASES_JSON}" \
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| grep -o "\"tag_name\": \"${component}/.*\"" \
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| cut -d\" -f4 | cut -d/ -f2 \
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| ${SORT} ${VERSION_FLAG} | tail -1
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