107 lines
3.3 KiB
Bash
Executable File
107 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# Strata publishes annotated tags and GitHub source archives, but no checksum
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# manifest. Download the small archive only when a newer stable release exists,
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# then verify that its embedded commit matches the release tag before hashing it.
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set -euo pipefail
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REPO='lgse/strata'
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API_URL="https://api.github.com/repos/$REPO"
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current=$(awk -F= '/^pkgver=/ { print $2; exit }' PKGBUILD)
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releases=$(curl -fsSL "$API_URL/releases?per_page=100")
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now=$(date +%s)
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min_age=${MIN_RELEASE_AGE_SECONDS:-0}
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candidates=0
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best_version=''
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best_tag=''
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best_published_at=''
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while IFS=$'\t' read -r tag published_at; do
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if [[ ! $tag =~ ^v([0-9]+\.[0-9]+\.[0-9]+)$ ]]; then
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printf '%s has an unusable stable release tag: %s\n' "$REPO" "${tag:-<empty>}" >&2
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exit 1
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fi
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version=${BASH_REMATCH[1]}
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if [[ -z $published_at ]] || ! published_epoch=$(date --date="$published_at" +%s 2>/dev/null); then
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printf '%s release %s has an invalid publication time\n' "$REPO" "$tag" >&2
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exit 1
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fi
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candidates=$((candidates + 1))
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if ((now - published_epoch < min_age)) && [[ ${BYPASS_MIN_RELEASE_AGE:-} != 1 ]]; then
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continue
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fi
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if [[ -z $best_version ]] || (( $(vercmp "$version" "$best_version") > 0 )); then
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best_version=$version
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best_tag=$tag
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best_published_at=$published_at
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fi
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done < <(jq -r '.[] | select((.draft or .prerelease) | not) | [.tag_name // "", .published_at // ""] | @tsv' <<<"$releases")
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if ((candidates == 0)); then
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printf 'No stable releases found for %s\n' "$REPO" >&2
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exit 1
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fi
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if [[ -z $best_version ]] || (( $(vercmp "$best_version" "$current") <= 0 )); then
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echo '{}'
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exit 0
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fi
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tag_ref=$(curl -fsSL "$API_URL/git/ref/tags/$best_tag")
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tag_type=$(jq -r '.object.type // empty' <<<"$tag_ref")
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tag_object=$(jq -r '.object.sha // empty' <<<"$tag_ref")
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if [[ ! $tag_object =~ ^[0-9a-f]{40}$ ]]; then
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printf 'Release %s has an invalid tag object\n' "$best_tag" >&2
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exit 1
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fi
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case "$tag_type" in
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commit)
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expected_commit=$tag_object
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;;
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tag)
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tag_data=$(curl -fsSL "$API_URL/git/tags/$tag_object")
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if [[ $(jq -r '.object.type // empty' <<<"$tag_data") != commit ]]; then
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printf 'Release %s does not resolve to a commit\n' "$best_tag" >&2
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exit 1
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fi
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expected_commit=$(jq -r '.object.sha // empty' <<<"$tag_data")
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;;
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*)
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printf 'Release %s has unsupported tag object type %s\n' "$best_tag" "${tag_type:-<empty>}" >&2
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exit 1
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;;
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esac
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if [[ ! $expected_commit =~ ^[0-9a-f]{40}$ ]]; then
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printf 'Release %s resolves to an invalid commit\n' "$best_tag" >&2
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exit 1
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fi
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tarball=$(mktemp)
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trap 'rm -f "$tarball"' EXIT
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curl -fsSL -o "$tarball" "https://github.com/$REPO/archive/refs/tags/$best_tag.tar.gz"
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expected_root="strata-$best_version"
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served_roots=$(tar -tzf "$tarball" | cut -d/ -f1 | sort -u)
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if [[ $served_roots != "$expected_root" ]]; then
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printf 'Release %s contains root %s, expected %s\n' "$best_tag" "$served_roots" "$expected_root" >&2
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exit 1
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fi
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if ! archive_commit=$(git get-tar-commit-id < <(gzip -dc "$tarball")) ||
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[[ $archive_commit != "$expected_commit" ]]; then
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printf 'Release %s archive commit does not match its tag\n' "$best_tag" >&2
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exit 1
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fi
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jq -n \
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--arg pkgver "$best_version" \
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--arg published_at "$best_published_at" \
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--arg source "$(sha256sum "$tarball" | cut -d' ' -f1)" \
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'{pkgver: $pkgver, published_at: $published_at, sha256sums: {any: [$source]}}'
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