forked from heavy-duty/ceremony
251 lines
12 KiB
Bash
251 lines
12 KiB
Bash
#!/usr/bin/env bash
|
|
set -euo pipefail
|
|
|
|
# changelog-assembled.sh [<base-ref>] [<changelog>] [<fragments-dir>] [<version-source>]
|
|
# — assert that a release PR's stamped section is EXACTLY what the fragments
|
|
# it consumed assemble to: read the fragments as of the MERGE BASE (they are
|
|
# gone from HEAD's tree — that is the point of the ceremony), replay the
|
|
# assembler's --check over that set, and compare byte-for-byte against
|
|
# changelog_section on HEAD (#116; the fragment flow is #112).
|
|
#
|
|
# The failure it exists to catch leaves no trace — the shape every guard in
|
|
# this family was bought by. bin/changelog-assemble is run BY HAND in the
|
|
# release PR, deliberately: the assembled section must land in the PR diff
|
|
# where the panel reads it (#114). Drop one fragment from the deletion and
|
|
# its entry is simply absent from the release: the file is well-formed,
|
|
# changelog-armed is green (the section exists and has prose),
|
|
# changelog-monotonic is green (no heading was deleted), and the publisher
|
|
# happily publishes the shortened section. Hand-edit one word of the
|
|
# assembled prose and the published history quietly stops being what the
|
|
# authors wrote. The only way anyone finds out is by reading the release
|
|
# body against a directory that no longer exists.
|
|
#
|
|
# Why this cannot live in changelog-armed: "the section matches the
|
|
# fragments it consumed" is not a property of a TREE — no single tree holds
|
|
# both the fragments and the section they became. It is a property of a
|
|
# DIFF: what existed at the merge base versus what HEAD stamped. That is
|
|
# exactly the argument changelog-monotonic made for being its own git-aware
|
|
# action rather than a clause inside changelog-armed, and this is the third
|
|
# guard on the same reasoning. changelog-armed.sh stays drivable against
|
|
# constructed two-file trees that are not git repos at all.
|
|
#
|
|
# The date is never compared as prose: --check prints the section BODY with
|
|
# no '## ' heading, and changelog_section extracts the body below HEAD's
|
|
# heading — so the date HEAD stamped into its heading never enters the
|
|
# comparison, and a date difference can never masquerade as a prose one.
|
|
|
|
base_ref="${1:-${CHANGELOG_ASSEMBLED_BASE:-origin/main}}"
|
|
changelog="${2:-${CHANGELOG:-CHANGELOG.md}}"
|
|
dir="${3:-${CHANGELOG_ASSEMBLED_DIR:-changelog.d}}"
|
|
version_source="${4:-${VERSION_SOURCE:-file}}"
|
|
|
|
# Fail-closed switch, changelog-monotonic's stance exactly: CI sets it (the
|
|
# action defaults strict to "1"), so a degradation that is sensible on a
|
|
# laptop becomes a red run there. A guard that can quietly stop guarding is
|
|
# the failure shape this whole family of checks exists to refuse.
|
|
strict="${CHANGELOG_ASSEMBLED_STRICT:-0}"
|
|
|
|
# The shared libs and the assembler travel with this action: a consumer's
|
|
# `uses: heavy-duty/ceremony/actions/changelog-assembled@<tag>` downloads
|
|
# this whole repository at that ref, so ../../lib and ../../bin are always
|
|
# present and always at the same ref — no checkout step, no version skew.
|
|
here="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
|
|
# shellcheck source=lib/version.sh
|
|
. "$here/../../lib/version.sh"
|
|
# shellcheck source=lib/changelog.sh
|
|
. "$here/../../lib/changelog.sh"
|
|
assemble="$here/../../bin/changelog-assemble"
|
|
|
|
skip() {
|
|
if [ "$strict" = "1" ]; then
|
|
echo "changelog-assembled: $* — and CHANGELOG_ASSEMBLED_STRICT=1, so this is a FAILURE, not a skip." >&2
|
|
echo " CI sets STRICT because a guard that quietly stops guarding is worse than no guard." >&2
|
|
echo " Fix the checkout, not this script: the base ref must be fetched (fetch-depth: 0)." >&2
|
|
exit 1
|
|
fi
|
|
echo "changelog-assembled: SKIPPED — $*"
|
|
echo " (Everything this guard asserts compares HEAD against the merge base —"
|
|
echo " without the history there is nothing it can honestly say. In CI this"
|
|
echo " same condition is a hard failure.)"
|
|
exit 0
|
|
}
|
|
|
|
# A pass with a NOTICE, never a skip in silence: an inapplicable tree is a
|
|
# legitimate green, and the log says why instead of implying a check ran.
|
|
notice() {
|
|
echo "changelog-assembled: NOTICE — $*"
|
|
exit 0
|
|
}
|
|
|
|
[ -f "$changelog" ] || { echo "changelog-assembled: no such file: $changelog" >&2; exit 1; }
|
|
|
|
# --- everything here needs the HISTORY ---------------------------------------
|
|
# Even applicability does: "fragment mode" is a fact about the merge base,
|
|
# not about HEAD's tree, whose fragments are consumed by construction. So
|
|
# unlike changelog-monotonic there is no history-free half to run first —
|
|
# an unusable checkout degrades (or, under STRICT, refuses) before the
|
|
# guard claims anything.
|
|
|
|
git rev-parse --is-inside-work-tree >/dev/null 2>&1 \
|
|
|| skip "not inside a git work tree, so there is no merge base to read the fragments from"
|
|
|
|
git rev-parse --verify --quiet "$base_ref^{commit}" >/dev/null \
|
|
|| skip "base ref '$base_ref' does not resolve here (a shallow clone, or a fork checkout without the upstream remote)"
|
|
|
|
merge_base="$(git merge-base "$base_ref" HEAD 2>/dev/null || true)"
|
|
[ -n "$merge_base" ] \
|
|
|| skip "no merge base between '$base_ref' and HEAD (unrelated histories, or a clone too shallow to reach one)"
|
|
|
|
short_base="$(git rev-parse --short "$merge_base")"
|
|
|
|
# Push-to-main shape: the merge base IS HEAD, so the fragment set this guard
|
|
# would replay is HEAD's own — nothing was consumed between the two points,
|
|
# and comparing a tree against itself would assert nothing. Named honestly,
|
|
# the same discipline as changelog-monotonic's vacuous line.
|
|
if [ "$merge_base" = "$(git rev-parse HEAD)" ]; then
|
|
echo "changelog-assembled: vacuous (the merge base IS HEAD, so no fragments were consumed between them — there is no diff for the section to answer to)."
|
|
exit 0
|
|
fi
|
|
|
|
# --- applicability: the ceremony PR, and nothing else ------------------------
|
|
|
|
if ! git cat-file -e "$merge_base:$dir" 2>/dev/null; then
|
|
notice "no '$dir/' at the merge base ($short_base) — legacy mode; the changelog is edited directly and there is no fragment set for a section to answer to"
|
|
fi
|
|
|
|
# version_read refuses loudly on a missing or empty source; the wrapper line
|
|
# names the guard so a workflow log shows which check refused.
|
|
ver="$(version_read "$version_source")" || {
|
|
echo "changelog-assembled: cannot read the version (version-source: $version_source)" >&2
|
|
exit 1
|
|
}
|
|
|
|
if version_is_dev "$ver"; then
|
|
notice "version '$ver' is a development tree — no release section is being stamped; whatever this PR does to '$dir/' is cargo for a future ceremony, not a consumption to verify"
|
|
fi
|
|
|
|
tmp="$(mktemp -d)"
|
|
trap 'rm -rf "$tmp"' EXIT
|
|
|
|
git show "$merge_base:$changelog" >"$tmp/base-changelog.md" 2>/dev/null || : >"$tmp/base-changelog.md"
|
|
|
|
# A branch that merely SITS on a release is not the ceremony that stamped
|
|
# it: right after a release merges, main's version is bare until the -dev
|
|
# bump lands, and a PR branched in that window would otherwise be asked to
|
|
# answer for a consumption that happened at its merge base, not on it. If
|
|
# the section already existed at the merge base, this branch did not stamp
|
|
# it. Whole-version match, as everywhere in this family.
|
|
if awk -v ver="$ver" '/^## / && $2 == ver { found = 1; exit } END { exit !found }' "$tmp/base-changelog.md"; then
|
|
notice "the section for '$ver' already exists at the merge base ($short_base) — this branch is not the ceremony that stamped it, so there is no consumed set to answer to"
|
|
fi
|
|
|
|
# --- the replay: the merge base's fragment set, byte for byte ----------------
|
|
# Every blob in the directory is extracted — strays included, and subtrees
|
|
# recreated — so the replay refuses exactly what a real assembler run over
|
|
# that tree would have refused, instead of quietly narrowing the set.
|
|
|
|
mkdir -p "$tmp/$dir"
|
|
base_frags=""
|
|
while IFS= read -r -d '' entry; do
|
|
meta="${entry%%$'\t'*}"
|
|
path="${entry#*$'\t'}"
|
|
otype="$(printf '%s\n' "$meta" | awk '{ print $2 }')"
|
|
name="${path##*/}"
|
|
case "$otype" in
|
|
blob)
|
|
git show "$merge_base:$path" >"$tmp/$dir/$name"
|
|
case "$name" in
|
|
README.md) ;;
|
|
*.md) base_frags="${base_frags}${path}"$'\n' ;;
|
|
esac
|
|
;;
|
|
tree)
|
|
mkdir -p "$tmp/$dir/$name"
|
|
;;
|
|
esac
|
|
done < <(git ls-tree -z "$merge_base" -- "$dir/")
|
|
|
|
frag_count="$(printf '%s' "$base_frags" | grep -c . || true)"
|
|
|
|
failures=0
|
|
|
|
# Refusal: a fragment the ceremony consumed is still present on HEAD. The
|
|
# ceremony deletes exactly what it assembles (#112) — a fragment that
|
|
# survives its own release sits in the directory and is assembled AGAIN
|
|
# into the NEXT section, republishing its prose as if it were new.
|
|
survivors=""
|
|
while IFS= read -r p; do
|
|
[ -n "$p" ] || continue
|
|
if [ -e "$p" ]; then
|
|
survivors="${survivors} ${p}"$'\n'
|
|
fi
|
|
done <<<"$base_frags"
|
|
if [ -n "$survivors" ]; then
|
|
{
|
|
echo "changelog-assembled: fragment(s) present at the merge base ($short_base) are STILL PRESENT on HEAD:"
|
|
echo
|
|
printf '%s' "$survivors"
|
|
echo
|
|
echo " The ceremony deletes exactly what it assembles. A fragment that survives"
|
|
echo " its own release is assembled AGAIN into the next section, republishing"
|
|
echo " its prose as if it were new. Delete it in this PR — its entry is (or"
|
|
echo " should be) already in the stamped section."
|
|
} >&2
|
|
failures=$((failures + 1))
|
|
fi
|
|
|
|
expected=""
|
|
if expected="$( (cd "$tmp" && "$assemble" "$ver" --check --changelog "$tmp/base-changelog.md" --dir "$dir") 2>&1)"; then
|
|
found="$(changelog_section "$changelog" "$ver")"
|
|
if [ -z "$found" ]; then
|
|
{
|
|
echo "changelog-assembled: the version is '$ver' (a release tree) and '$dir/' at the"
|
|
echo " merge base ($short_base) holds $frag_count fragment(s), but $changelog has no"
|
|
echo " non-empty section for '$ver' on HEAD."
|
|
echo
|
|
echo " The fragments were consumed and their prose went nowhere: the release"
|
|
echo " this tree is about to publish would have a body the authors never got"
|
|
echo " to write. The ceremony's edit is one tool run, in this PR:"
|
|
echo
|
|
echo " bin/changelog-assemble '$ver'"
|
|
} >&2
|
|
failures=$((failures + 1))
|
|
else
|
|
if ! diff_out="$(diff -u \
|
|
--label "expected — assembled from the $frag_count fragment(s) at the merge base ($short_base)" \
|
|
--label "found — section '$ver' in $changelog on HEAD" \
|
|
<(printf '%s\n' "$expected") <(printf '%s\n' "$found"))"; then
|
|
{
|
|
echo "changelog-assembled: the section '$ver' in $changelog is NOT what the fragments it consumed assemble to:"
|
|
echo
|
|
printf '%s\n' "$diff_out" | sed 's/^/ /'
|
|
echo
|
|
echo " The release body is published verbatim from this section, so any"
|
|
echo " difference here ships: a missing line is an author's entry silently"
|
|
echo " dropped from history, an extra or edited line is prose nobody wrote,"
|
|
echo " and a re-ordering is not the canonical order the assembler produces."
|
|
echo " The fix is to redo the ceremony's edit with the tool — re-run"
|
|
echo " bin/changelog-assemble '$ver' <date> from the merge base's fragments —"
|
|
echo " never to hand-edit the section into agreement."
|
|
} >&2
|
|
failures=$((failures + 1))
|
|
fi
|
|
fi
|
|
else
|
|
{
|
|
echo "changelog-assembled: the merge base's fragment set does not assemble — the replay refuses:"
|
|
echo
|
|
printf '%s\n' "$expected" | sed 's/^/ /'
|
|
echo
|
|
echo " The set replayed is exactly '$dir/' as of the merge base ($short_base)."
|
|
echo " A section that bin/changelog-assemble would refuse to produce cannot"
|
|
echo " have been produced by it — whatever stamped this section did it by"
|
|
echo " hand, and the release body cannot be trusted to be what the fragment"
|
|
echo " authors wrote."
|
|
} >&2
|
|
failures=$((failures + 1))
|
|
fi
|
|
|
|
[ "$failures" -eq 0 ] || exit 1
|
|
|
|
echo "changelog-assembled: section '$ver' in $changelog is byte-for-byte the assembly of the $frag_count fragment(s) consumed at the merge base ($short_base)"
|