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This commit is contained in:
nuno maduro
2026-04-21 09:40:01 -07:00
parent f6609f4039
commit 51fc380789
3 changed files with 241 additions and 69 deletions
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84
src/Plugins/Tia.php
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@ -503,6 +503,22 @@ final class Tia implements AddsOutput, HandlesArguments, Terminable
$finalised[$testFile] = array_keys($sourceSet);
}
// Empty-edges guard: if every worker returned no edges it almost
// always means the coverage driver wasn't loaded in the workers
// (common footgun with custom PHP ini scan dirs, Herd profiles,
// stripped CI runners). Writing the empty graph would silently
// seed a broken baseline; fail loud instead.
if ($finalised === []) {
$this->output->writeln([
'',
' <fg=white;bg=red> ERROR </> TIA recorded zero edges — coverage driver likely missing.',
' Install / enable <fg=cyan>pcov</> or <fg=cyan>xdebug</> (mode: coverage) in the worker PHP and retry.',
'',
]);
return $exitCode;
}
$graph->replaceEdges($finalised);
$graph->pruneMissingTests();
@ -527,6 +543,56 @@ final class Tia implements AddsOutput, HandlesArguments, Terminable
return $exitCode;
}
/**
* Compares a loaded graph's fingerprint to the current one and decides
* how much of the graph is still usable.
*
* - **Structural drift** (composer.lock, Pest.php, factory codegen,
* schema bump): edges themselves are potentially wrong → discard
* the whole graph + coverage cache and return null. Caller falls
* through to record mode.
* - **Environmental drift** (PHP minor, extension set, Pest version):
* edges describe the code correctly; only the cached per-test
* results were captured against a different runtime and might not
* reproduce. Drop `baselines[branch].results` + coverage cache,
* bump the fingerprint to the current env, persist. Caller uses
* the graph for edges; results refill naturally during this run's
* replay (every test misses cache, runs normally, seeds results).
* - **Match**: return the graph untouched.
*
* @param array{structural: array<string, mixed>, environmental: array<string, mixed>} $current
*/
private function reconcileFingerprint(Graph $graph, array $current): ?Graph
{
$stored = $graph->fingerprint();
if (! Fingerprint::structuralMatches($stored, $current)) {
$this->output->writeln(
' <fg=yellow>TIA</> graph structure outdated — rebuilding.',
);
$this->state->delete(self::KEY_GRAPH);
$this->state->delete(self::KEY_COVERAGE_CACHE);
return null;
}
$drift = Fingerprint::environmentalDrift($stored, $current);
if ($drift !== []) {
$this->output->writeln(sprintf(
' <fg=yellow>TIA</> env differs from baseline (%s) — results dropped, edges reused.',
implode(', ', $drift),
));
$graph->clearResults($this->branch);
$graph->setFingerprint($current);
$this->saveGraph($graph);
$this->state->delete(self::KEY_COVERAGE_CACHE);
}
return $graph;
}
/**
* @param array<int, string> $arguments
* @return array<int, string>
@ -547,11 +613,8 @@ final class Tia implements AddsOutput, HandlesArguments, Terminable
$graph = $forceRebuild ? null : $this->loadGraph($projectRoot);
if ($graph instanceof Graph && ! Fingerprint::matches($graph->fingerprint(), $fingerprint)) {
$this->output->writeln(
' <fg=yellow>TIA</> environment fingerprint changed — graph will be rebuilt.',
);
$graph = null;
if ($graph instanceof Graph) {
$graph = $this->reconcileFingerprint($graph, $fingerprint);
}
if ($graph instanceof Graph) {
@ -571,18 +634,13 @@ final class Tia implements AddsOutput, HandlesArguments, Terminable
// No local graph and not being forced to rebuild from scratch: try
// to pull a team-shared baseline so fresh checkouts (new devs, CI
// containers) don't pay the full record cost. If the pull succeeds
// the graph is re-read and re-validated against the local env.
// the graph is re-read and reconciled against the local env.
if ($graph === null && ! $forceRebuild) {
if ($this->baselineSync->fetchIfAvailable($projectRoot)) {
$graph = $this->loadGraph($projectRoot);
if ($graph instanceof Graph && ! Fingerprint::matches($graph->fingerprint(), $fingerprint)) {
$this->output->writeln(
' <fg=yellow>TIA</> pulled baseline fingerprint mismatch — discarding.',
);
$this->state->delete(self::KEY_GRAPH);
$this->state->delete(self::KEY_COVERAGE_CACHE);
$graph = null;
if ($graph instanceof Graph) {
$graph = $this->reconcileFingerprint($graph, $fingerprint);
}
}
}