Files
home-network-k3s-impl/ci/touched-requirements.sh
T
jakman85andClaude Opus 5 a76ae3bdfa fix(ci): the content scan could not match R-C2-01/02 — a digit in the workstream segment
Checked as part of closing the C2 coverage gaps, and it was live on main. The content
scan's pattern was `R-[A-Z]+-[0-9]+`, which CANNOT match an ID whose workstream segment
carries a digit: `[A-Z]+` consumes the `C` of `R-C2-01` and then demands a `-` where the
`2` is. `R-C2-01` and `R-C2-02` are the only two such IDs in
conformance/requirements/registry.yaml, and the scan was blind to BOTH.

REPRODUCED before the fix, on a throwaway repo whose only change is a manifest declaring
both IDs on real (non-comment) lines, in a path the map keys to nothing:

    $ REPO_ROOT=$T BASE_REF=main ci/touched-requirements.sh
    R-NET-06                     # the all-letter control ID was the ONLY output

It failed by UNDER-attributing, which is the fail-OPEN direction: a change that retyped a
`conformance.home.k3s/R-C2-01` tag, or a manifest self-declaring R-C2-02, contributed
those IDs to NOBODY, so the C2 tests were filtered out of the merge gate. Same defect
class as the map's `*) : ;;` arm — a miss that reads as "nothing touched".

Every other consumer in the repo already allowed the digit, which is why this was the lone
dissenter: test_requirements_for_path() twenty lines above in this same script,
conformance/lib/coverage.py, conformance/lib/status.py and conformance/lib/
run_l1_offline.py all use `R-[A-Z0-9]+-[0-9]+`. Aligned to that form, with the reason
recorded at the line.

SCOPE OF THE HOLE. path_requirements() has no arm for platform/homepage/* or
platform/headlamp/* either, so before this the ONLY route to R-C2-01/02 was detection rule
3 (editing the C2 conformance test itself). No path-map arm is added here: c2-root-surface
declares `scope: whole-repo`, so ci/l0.sh Stage 3b's --include-scope union selects it on
EVERY gate invocation regardless of the touched set — which is the right mechanism for an
invariant whose input surface is the whole tree, and strictly stronger than a two-component
path arm would be.

REGRESSION-TESTED, in ci/tests/touched-requirements.test.sh (the suite `make -C ci test`
runs): a fixture declaring R-C2-01 / R-C2-02 / R-OBS-04 from `notes/` — a path outside
path_requirements(), so the IDs can only come from the content scan — asserts both digit
IDs ARE attributed, that the all-letter form still is (control), and that a purely numeric
workstream is not invented (the pattern must not widen the gate on noise).

PROVEN TO DETECT BREAKAGE: with the pattern reverted to `R-[A-Z]+-[0-9]+` the suite reports
`FAIL (2 failed, 14 passed)` naming both C2 IDs as missing; restored, all three ci/ suites
pass (16 assertions in this one).

ALSO: conformance/tests/l0-static/whole-repo-invariants-wired/check.sh cites this pattern
in the comment explaining why its BOGUS_REQ fixture is lowercase. Citation updated so the
reasoning still reads true; the fixture is unaffected (grep -E is case-sensitive, and the
check still passes 26/26).

NOTE: another branch may be editing this same script concurrently. This is a one-line
change to one statement plus its comment — expect a trivial conflict and keep the
`[A-Z0-9]` form.

Co-Authored-By: Claude Opus 5 <[email protected]>
2026-09-13 16:28:21 -05:00

383 lines
23 KiB
Bash
Executable File

#!/usr/bin/env bash
# ci/touched-requirements.sh — compute the requirement subset a change "touches".
#
# R-TEST-03 gates a merge on the conformance subset tagged with the requirement
# IDs the change touches. This script derives that subset from the diff so the
# conformance runner can be filtered to it (conformance.sh --requirements ...).
#
# Output (stdout): newline-separated, sorted, unique R-* IDs. Nothing else goes
# to stdout, so callers can `mapfile`/`$(...)` it directly.
#
# SOURCE OF TRUTH (reconciled, PM 2026-08-16): the conformance requirement TAGS are
# authoritative. Each Chainsaw test declares the requirements it verifies via
# `conformance.home.k3s/<R-ID>` labels; the coverage report (conformance/_artifacts/
# coverage/coverage.json) is generated from those tags. This script's job is only to
# select which tagged subset a change TOUCHES, then hand those IDs to
# `conformance.sh --requirements ...` which runs exactly the tests carrying those tags.
#
# Detection = union of:
# 1. R-* tokens on the ADDED/REMOVED LINES of the diff, in non-Markdown files —
# including the authoritative `conformance.home.k3s/R-*` tags on changed tests, and
# the R-IDs that policies/ServiceDefinitions self-declare (docs/14 + ADR-0011).
# Untouched lines and prose are NOT scanned; see changed_diff() for why.
# 2. A coarse path->requirement fallback for changes that don't self-declare IDs.
# 3. For a change anywhere under `conformance/tests/<test>/`: THAT TEST'S OWN requirement
# labels, read from its chainsaw-test.yaml. See test_requirements_for_path().
# The coarse map (2) NEVER overrides an explicit tag; it only widens coverage for
# untagged changes so nothing silently escapes the gate. (3) is the same principle applied
# to the tests themselves: editing or weakening a test must be gated by the requirements
# that test CERTIFIES, not merely by R-TEST-0x.
set -euo pipefail
CI_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck disable=SC1091
source "${CI_DIR}/lib.sh"
# ---------------------------------------------------------------------------------
# BASE-REF RESOLUTION — and why it now REFUSES rather than guesses.
#
# BUG THIS FIXES (local/CI divergence, 2026-08-31): every failure to establish a
# reliable diff base used to degrade SILENTLY to an EMPTY touched set, which main()
# reported as "no changed files vs base" and exit 0. An empty set means the coverage
# `--require` gate is never applied, so the merge gate printed "MERGE GATE: PASS"
# having checked NOTHING — while CI, with a correct base, computed 17 touched
# requirements and blocked. A false green is the worst outcome this project can
# produce, so every one of those degradations is now a LOUD exit 3:
#
# * HEAD~1 last resort REMOVED. It silently narrowed the diff to the last commit
# (and on a one-commit repo failed into an empty set).
# * two-dot fallback REMOVED. It masked a failing three-dot diff as "no changes".
# * unresolvable base exit 3 (was: HEAD~1 or empty).
# * diff command fails exit 3 (was: empty set).
# * HEAD not ahead of exit 3 (was: exit 0 with an empty set — this is the case
# the base that produced the false green: running the gate while
# sitting on `main`, or on a branch already merged).
#
# Exit 3 is the ci/README.md "SKIPPED / not-run" code: NOT a pass, NOT a fail. Callers
# (ci/gate.sh) must surface it as an UNDECIDED merge decision. An honest, noisy skip
# beats a quiet false pass.
#
# Order of preference: BASE_REF (explicit) > GITHUB_BASE_REF (Actions PR runs, target
# branch) > origin/main > main. Each candidate is VERIFIED to resolve to a commit
# before it is used, so a shallow checkout that lacks origin/main is reported, not
# papered over.
: "${BASE_REF:=}"
BASE="" # resolved base ref
BASE_SOURCE="" # where it came from (for the log line)
BASE_PROBLEM="" # why resolution failed, when it did
rev() { git -C "$REPO_ROOT" rev-parse --verify -q "$1^{commit}" 2>/dev/null; }
# Loud, structured refusal. Prints to stderr only; stdout stays empty so a caller that
# captures stdout gets NO requirement list rather than a silently-empty one.
#
# $1 is a machine-readable REASON CODE, also written to $TOUCHED_REASON_FILE when that
# env var names a path. ci/gate.sh uses it to tell the two cases apart:
# on-base HEAD is the base branch (or already merged) — nothing to gate. Legitimate
# (a push-to-main CI run lands here), so the gate reports NOT APPLICABLE
# rather than PASS, and does not fail the job.
# no-base no reliable base ref exists in this checkout — the ENVIRONMENT is broken,
# diff-failed or git could not produce the diff. A merge decision is impossible, so the
# gate BLOCKS rather than guessing.
undecidable() {
local code="$1"; shift
if [ -n "${TOUCHED_REASON_FILE:-}" ]; then printf '%s\n' "$code" > "$TOUCHED_REASON_FILE"; fi
err "TOUCHED-REQUIREMENT SET NOT DETERMINABLE (${code})"
err " reason: $*"
err " consequence: the R-TEST-03 coverage gate CANNOT be applied to this checkout."
err " This is exit 3 (SKIPPED / not-run), never a pass — see ci/README.md."
err " Fix one of:"
err " * check out the feature branch you mean to gate (not the base branch), or"
err " * git fetch origin main (so origin/main exists and is current), or"
err " * BASE_REF=<ref> make -C ci gate to name the base explicitly."
exit 3
}
resolve_base() {
local cand
if [ -n "$BASE_REF" ]; then
if rev "$BASE_REF" >/dev/null; then BASE="$BASE_REF"; BASE_SOURCE="BASE_REF"; return 0; fi
BASE_PROBLEM="BASE_REF='${BASE_REF}' does not resolve to a commit in ${REPO_ROOT}"
return 1
fi
if [ -n "${GITHUB_BASE_REF:-}" ]; then
for cand in "origin/${GITHUB_BASE_REF}" "${GITHUB_BASE_REF}"; do
if rev "$cand" >/dev/null; then BASE="$cand"; BASE_SOURCE="GITHUB_BASE_REF"; return 0; fi
done
BASE_PROBLEM="GITHUB_BASE_REF='${GITHUB_BASE_REF}' is set, but neither 'origin/${GITHUB_BASE_REF}' nor '${GITHUB_BASE_REF}' exists here (shallow checkout? the workflow needs fetch-depth: 0)"
return 1
fi
for cand in origin/main main; do
if rev "$cand" >/dev/null; then BASE="$cand"; BASE_SOURCE="default"; return 0; fi
done
BASE_PROBLEM="no base ref resolves (tried origin/main, main) in ${REPO_ROOT}"
return 1
}
# Both diff helpers assume BASE is already resolved and validated by main(). They return
# git's exit status so the CALLER can distinguish "no changes" from "the diff failed" —
# conflating those two is exactly what produced the false green.
changed_files() {
# Three-dot: changes on this branch since it diverged from base.
git -C "$REPO_ROOT" diff --name-only "${BASE}...HEAD"
}
# The ADDED/REMOVED lines of the change, for the R-ID content scan — excluding
# documentation.
#
# THREE scoping rules, all learned from the gate blocking merges it should not have:
#
# 1. Scan the DIFF, not whole file contents. Grepping whole files meant a change
# inherited every requirement those files had EVER mentioned, on lines the author
# never touched. Since some of those are legitimately uncovered, `--require-all`
# then failed and BLOCKED the merge over unrelated prose.
#
# 2. Skip `*.md`. A requirement ID in prose is a REFERENCE, not a declaration —
# explaining a requirement is not the same as changing behaviour against it.
# Without this, the decision log cannot record which requirements a change
# concerned without thereby claiming to have touched them, and the CI-fix commit
# that explains a mis-attribution re-triggers the very mis-attribution it fixes.
# Nothing escapes: authoritative declarations (`conformance.home.k3s/R-*` tags,
# Kyverno policies, ServiceDefinitions) all live in YAML, and the doc subtrees
# that matter (conformance/, schemas/, catalog/, clusters/, ci/) are covered by
# the path->requirement fallback regardless of file type.
#
# 3. Skip COMMENT-ONLY lines in non-Markdown files — rule 2's logic, applied to the
# prose that lives INSIDE code files. A requirement ID cited in a YAML/shell `#`
# comment is documentation, not a declaration, exactly like an ID in a `*.md` file.
# Rule 2 drops whole Markdown files, but a `.gitea/workflows/*.yml` or `ci/*.sh`
# HEADER that explains a requirement would otherwise re-attribute it. Concretely:
# gate.yml's header cites R-TEST-06 (enforced by the spec-immutability STAGE, not by
# any Chainsaw test, so a known-uncovered ID); before this rule, editing that comment
# re-attributed R-TEST-06 and the coverage `--require` check false-blocked the merge —
# the same self-referential trap rule 2 fixed for `*.md`. Applied in main()'s content
# scan (see there): after the diff marker is stripped, a line whose first non-blank
# character is `#` is dropped BEFORE the R-ID grep. Deliberately conservative — only
# WHOLE-LINE comments are dropped; an R-ID on a real code/spec line is still detected
# (authoritative declarations — test tags, policies, ServiceDefinitions — are never a
# bare comment), so this only narrows PROSE, never a declaration.
#
# Removed lines count: deleting a test's requirement tag, or a policy's self-declared
# ID, touches that requirement just as much as adding one.
# `:(exclude)*.md` drops Markdown from the content scan (rule 2 above).
# `:(exclude)ci/tests/` drops this dir's OWN unit-test fixtures: those files embed example
# R-IDs as DATA (asserting the scan's behaviour), never as declarations — the same
# "reference, not declaration" logic as rule 2. Their gate coverage is unaffected: any
# ci/ change (ci/tests/ included) still attributes R-GITOPS-01/R-TEST-02/R-TEST-03 via the
# path->requirement map below. NOTE: this excludes ci/tests/ only — conformance/tests/
# carry AUTHORITATIVE `conformance.home.k3s/R-*` labels and are deliberately still scanned.
# Three-dot to match changed_files(): changes on this branch since it diverged from base.
changed_diff() {
local -a excl=(':(exclude)*.md' ':(exclude)ci/tests/')
git -C "$REPO_ROOT" diff -U0 "${BASE}...HEAD" -- . "${excl[@]}"
}
# Coarse path -> requirement map. Deliberately conservative; extend as subtrees
# fill in. Left side is a path prefix (relative to repo root).
path_requirements() {
case "$1" in
catalog/*) echo "R-GITOPS-02" ;;
schemas/*) echo "R-GITOPS-02" ;;
platform/kyverno/*) echo "R-TEST-01 R-NET-01 R-SEC-01" ;;
platform/cilium/*) echo "R-NET-01 R-NET-02 R-NET-05" ;;
platform/longhorn/*) echo "R-STATE-01 R-STATE-02" ;;
platform/cert-manager/*) echo "R-TLS-01 R-TLS-02" ;;
platform/externaldns/*) echo "R-DNS-02" ;;
platform/velero/*) echo "R-STATE-03" ;;
platform/monitoring/*) echo "R-OBS-01 R-OBS-02" ;;
# platform/cnpg was UNMAPPED until 2026-09-06. It is the PostgreSQL DR path for keycloak-db /
# nextcloud-db / semaphore-db (barmanObjectStore WAL archiving + ScheduledBackup), so a change
# there is an R-IDP-05 / R-STATE-03 change; it now also carries the platform-health alert rules
# for that path (R-OBS-04). Without this line an edit under platform/cnpg/ contributed ZERO
# requirements unless it happened to retype an R-ID on a non-comment line, and escaped the gate.
platform/cnpg/*) echo "R-IDP-05 R-STATE-03 R-OBS-04" ;;
# vpn-egress was UNMAPPED until 2026-09-06. platform/vpn-egress/egress-steering.yaml IS the
# R-NET-04 datapath (the rule that selects between the two egress paths) and the R-NET-05/06/07
# steering policy — it even self-declares those IDs in its `homelab.keithjackson.dev/requirements`
# annotation. But the content scan only reads ADDED/REMOVED lines, so any edit that does not
# happen to retype an R-ID (a selector change, an excludedCIDRs change, a comment) contributed
# ZERO requirements and escaped the gate entirely. Mapped explicitly; the annotation still wins
# when a diff does carry the tags.
platform/vpn-egress/*) echo "R-NET-04 R-NET-05 R-NET-06 R-NET-07" ;;
# Keycloak is the whole SSO surface: the realm import (declarative identity config),
# the SOPS client secrets, and the reconciler that heals them. Added 2026-09-06 after
# the client-secret incident, in which editing platform/keycloak/ attributed NO
# requirement, so the L2 keycloak tests were filtered out of the merge gate's touched
# subset — the change that could break every OIDC login was gated by nothing.
# R-IDP-05 is in scope because platform/keycloak/ also carries the CNPG DB Cluster and
# its off-cluster backup credential, not only the realm.
platform/keycloak/*) echo "R-IDP-01 R-IDP-02 R-IDP-03 R-IDP-04 R-IDP-05 R-IDP-06" ;;
platform/oauth2-proxy/*) echo "R-IDP-02 R-IDP-06" ;;
platform/image-automation/*) echo "R-UPD-01 R-UPD-02" ;;
conformance/*) echo "R-TEST-01 R-TEST-02 R-TEST-03 R-TEST-04" ;;
# infra/ was UNMAPPED until 2026-09-12 — the OpenTofu + Ansible that provision the dev
# nodes. conformance/tests/l0-static/dev-nodes-provisioned-as-code reads NOTHING but
# infra/, yet an infra/ edit attributed ZERO requirements, so the one check that asserts
# the nodes are provisioned as code was filtered out of every change that could break it.
# That test's invariant IS path-scoped (it is deliberately NOT whole-repo-scoped; see its
# chainsaw-test.yaml), and the correct fix for a path-scoped invariant is a path-map entry.
infra/*) echo "R-ENV-01" ;;
clusters/*) echo "R-GITOPS-01 R-ENV-02" ;;
# bootstrap/ was UNMAPPED until 2026-09-06. The entry STAYS, but its original rationale
# was written against a file that is not here, and that is corrected on 2026-09-13:
# it claimed "bootstrap/standup.sh carries the placeholder guards that decide whether
# `velero` may be enabled against a real backup endpoint". bootstrap/standup.sh HAS NEVER
# BEEN ON `main` — it was not deleted (no deletion commit exists anywhere), it landed only
# on unmerged prod-standup branches. `git ls-tree main bootstrap/` lists README.md, flux/,
# gitea/, sops/. So R-STATE-03 here is ANTICIPATORY, not descriptive.
#
# WHY IT IS STILL RIGHT. conformance/tests/l0-static/placeholder-guard-coupling DISCOVERS
# its guard (any tracked *.sh defining `<name>_is_placeholder()`) instead of hardcoding a
# path, so the moment a standup guard lands under bootstrap/ that test's coupling half
# activates — and this entry is what selects the test for the change that lands it.
# Deleting the entry would mean the change introducing a placeholder guard is gated by
# nothing, which is the 2026-09-05 class (a prefix glob that stopped matching when the
# value it guards changed, in a different file) left to reintroduce itself. R-GITOPS-01 is
# descriptive today: bootstrap/flux/, gitea/ and sops/ ARE the GitOps bootstrap path.
# Locked down by ci/tests/touched-requirements.test.sh's path-map section.
bootstrap/*) echo "R-STATE-03 R-GITOPS-01" ;;
# R-TEST-06 added 2026-09-12. The comment in changed_diff()'s rule 3 above records why it
# was ABSENT: R-TEST-06 used to be enforced by the spec-immutability STAGE and carried by no
# Chainsaw test, so attributing it made the coverage `--require` check false-block. It is now
# carried by conformance/tests/l0-static/spec-immutability-enforced — whose entire input
# surface is ci/ — so a ci/ change must attribute it, or the test that proves the
# spec-immutability mechanism is still load-bearing runs on nothing that can break it.
.gitea/*|ci/*) echo "R-GITOPS-01 R-TEST-02 R-TEST-03 R-TEST-06" ;;
*) : ;;
esac
}
# ---------------------------------------------------------------------------------
# A CHANGED TEST ATTRIBUTES THE REQUIREMENTS IT CERTIFIES (detection rule 3).
#
# THE GAP THIS CLOSES (2026-09-12). The path map keys `conformance/*` to
# R-TEST-01..04 — the requirements about the HARNESS. It says nothing about what a given
# test PROVES. So editing `conformance/tests/l2-behavioral/tenant-isolation/check.sh` to
# weaken or delete an assertion attributed R-TEST-01..04 and nothing else: the merge gate
# then ran the harness's self-tests and NOT the weakened test's own requirement subset.
# Weakening a test is the one change that most needs the requirement it certifies to be
# re-verified, and it was the change least likely to select it.
#
# The `conformance.home.k3s/R-*: "true"` labels on a test ARE the authoritative declaration of
# what it verifies (lib/coverage.py reads the same labels); this reads them directly. Note the
# content scan in main() only sees ADDED/REMOVED lines, so it catches a change to the LABEL
# BLOCK but not a change to the test BODY — which is exactly the case that matters here.
#
# WHY IT READS HEAD *OR* THE BASE: a change that DELETES a test, or deletes its
# chainsaw-test.yaml, must still attribute what that test used to certify — otherwise removing
# the only verifier of a requirement is the cheapest way to make the gate stop checking it.
# HEAD first (the post-change truth), base as the fallback (the deleted case). Fail-closed:
# this function can only ADD requirements, never remove one.
: "${CONF_TEST_LABEL_PREFIX:=conformance.home.k3s}" # == CONF_LABEL_PREFIX, conformance/lib/common.sh
file_text_head_or_base() {
local path="$1"
git -C "$REPO_ROOT" show "HEAD:${path}" 2>/dev/null && return 0
git -C "$REPO_ROOT" show "${BASE}:${path}" 2>/dev/null && return 0
return 0
}
# test_requirements_for_path <changed-path> -> space-separated R-IDs (possibly empty).
# Walks UP from the changed file to the nearest ancestor directory carrying a
# chainsaw-test.yaml, so it works for any file in a test dir (check.sh, mutations.py,
# fixtures, the chainsaw-test.yaml itself) and for nested test layouts.
test_requirements_for_path() {
local f="$1" dir yaml text
case "$f" in conformance/tests/*/*) ;; *) return 0 ;; esac
dir="${f%/*}"
while :; do
case "$dir" in
conformance/tests|conformance|.|"") return 0 ;;
*/*) ;;
*) return 0 ;;
esac
yaml="${dir}/chainsaw-test.yaml"
text="$(file_text_head_or_base "$yaml")"
if [ -n "$text" ]; then
# Whole-line `#` comments are dropped first — same "reference, not declaration" rule the
# content scan applies (changed_diff() rule 3): a label shown inside a header example is
# documentation. Only a real YAML mapping line counts.
printf '%s\n' "$text" \
| grep -vE '^[[:space:]]*#' \
| sed -nE "s#^[[:space:]]*${CONF_TEST_LABEL_PREFIX}/(R-[A-Z0-9]+-[0-9]+):[[:space:]]*[\"']?true.*#\1#p" \
| tr '\n' ' '
return 0
fi
dir="${dir%/*}"
done
}
main() {
local files reqs="" rc=0 base_sha head_sha local_main merge_base
resolve_base || undecidable no-base "$BASE_PROBLEM"
base_sha="$(rev "$BASE")" || undecidable no-base "resolved base '${BASE}' vanished"
head_sha="$(rev HEAD)" || undecidable no-base "HEAD does not resolve to a commit (empty repo?)"
log "diff base: ${BASE} (${BASE_SOURCE}) @ ${base_sha:0:12} ... HEAD @ ${head_sha:0:12}"
# Advisory: a never-fetched origin/main silently WIDENS the set (over-broad, never a
# false green) — surfaced so an unexpectedly large touched set has an explanation.
if [ "$BASE" = "origin/main" ] && local_main="$(rev main)" && [ -n "$local_main" ] \
&& [ "$local_main" != "$base_sha" ]; then
warn "local 'main' (${local_main:0:12}) != origin/main (${base_sha:0:12}) — if origin/main"
warn " was not fetched recently the touched set may be stale: git fetch origin main"
fi
merge_base="$(git -C "$REPO_ROOT" merge-base "$BASE" HEAD 2>/dev/null)" \
|| undecidable no-base "no merge base between '${BASE}' and HEAD (unrelated histories, or a shallow clone)"
if [ "$merge_base" = "$head_sha" ]; then
undecidable on-base "HEAD is not ahead of '${BASE}' (merge-base == HEAD): this checkout contains no branch commits to gate. The empty touched set would be empty BY DEFAULT, not by verification."
fi
files="$(changed_files)" || rc=$?
[ "$rc" -eq 0 ] || undecidable diff-failed "git diff --name-only ${BASE}...HEAD failed (rc=${rc})"
if [ -z "$files" ]; then
warn "HEAD is ahead of ${BASE} but the three-dot diff is empty (self-cancelling commits?)"
warn " -> genuinely empty touched-requirement set; base WAS established."
exit 0
fi
while IFS= read -r f; do
[ -n "$f" ] || continue
reqs+=" $(path_requirements "$f")"
# Detection rule 3: a change under conformance/tests/<test>/ attributes THAT TEST'S own
# requirement labels, so weakening a test is gated by what the test certifies.
reqs+=" $(test_requirements_for_path "$f")"
done <<< "$files"
# Self-declared R-IDs on the ADDED/REMOVED lines of the change (see changed_diff).
#
# THE ID PATTERN IS `R-[A-Z0-9]+-[0-9]+`, NOT `R-[A-Z]+-[0-9]+`. The WORKSTREAM segment may
# contain a DIGIT: `R-C2-01` and `R-C2-02` (command & control UI) are the only two such IDs
# in conformance/requirements/registry.yaml today, and the stricter pattern silently failed
# to match BOTH of them — `[A-Z]+` consumes the `C` and then demands a `-` where the `2` is.
# Every other consumer in the repo already allows the digit: test_requirements_for_path()
# twenty lines above uses `R-[A-Z0-9]+-[0-9]+`, as do conformance/lib/coverage.py,
# conformance/lib/status.py and conformance/lib/run_l1_offline.py. This grep was the lone
# dissenter, and it dissented by UNDER-attributing — the fail-OPEN direction. A change that
# retyped a `conformance.home.k3s/R-C2-01` tag, or a manifest self-declaring R-C2-02 from a
# path the map keys elsewhere, contributed those IDs to NOBODY, so the C2 tests were
# filtered out of the merge gate. Same defect class as the map's `*) : ;;` arm: a miss that
# reads as "nothing touched". path_requirements() has no arm for platform/homepage/* or
# platform/headlamp/* either, so before this fix the ONLY route to R-C2-01/02 was rule 3
# (editing the C2 test itself). Regression-tested in ci/tests/touched-requirements.test.sh.
# `^[+-]` keeps hunk headers (`@@`) and the `+++`/`---` file headers out of scope.
# `sed 's/^[+-]//'` then strips the single-char diff marker (safe: -U0 emits one), so
# what remains is the SOURCE line, and `grep -vE '^[[:space:]]*#'` drops whole-line
# YAML/shell comments (rule 3 in changed_diff's header) BEFORE the R-ID grep — a
# requirement cited only in a `#` comment is prose, not a declaration.
local diff_txt
diff_txt="$(changed_diff)" || rc=$?
[ "$rc" -eq 0 ] || undecidable diff-failed "git diff -U0 ${BASE}...HEAD failed (rc=${rc})"
reqs+=" $(printf '%s\n' "$diff_txt" \
| grep -E '^[+-]' \
| grep -vE '^(\+\+\+|---)' \
| sed -E 's/^[+-]//' \
| grep -vE '^[[:space:]]*#' \
| grep -hoE 'R-[A-Z0-9]+-[0-9]+' \
| tr '\n' ' ' || true)"
# Normalize: split, unique, sort. Emit to stdout.
printf '%s\n' $reqs | sed '/^$/d' | sort -u
}
main "$@"