41 lines
1.5 KiB
JavaScript
41 lines
1.5 KiB
JavaScript
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#!/usr/bin/env node
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// merge-summaries.mjs — combine multiple k6 --summary-export outputs into
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// one. Used because k6 accepts a single script per invocation, but our
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// regression-diff tooling (compare.mjs, bake-baseline.mjs) expects one
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// summary per run.
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//
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// Per-scenario summaries are disjoint in their metric tags
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// (folder_cascade.* vs share_cascade_rebac.* vs subject_group_nested.*),
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// so merging is just a union of the `metrics` maps. The top-level
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// envelope (root_group, options, etc.) is taken from the first input.
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//
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// Usage:
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// node merge-summaries.mjs <in1.json> [in2.json …] <out.json>
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import { readFileSync, writeFileSync } from 'node:fs';
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import { argv, exit } from 'node:process';
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if (argv.length < 5) {
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console.error('usage: merge-summaries.mjs <in1.json> [in2.json …] <out.json>');
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exit(2);
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}
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const inputs = argv.slice(2, -1);
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const output = argv[argv.length - 1];
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const merged = JSON.parse(readFileSync(inputs[0], 'utf8'));
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merged.metrics = { ...merged.metrics };
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for (const path of inputs.slice(1)) {
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const next = JSON.parse(readFileSync(path, 'utf8'));
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for (const [k, v] of Object.entries(next.metrics ?? {})) {
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// If two scenarios both report a global metric (e.g. http_req_duration
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// with no op tag), the second wins — these aren't gated by baseline.json,
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// so it's only the per-`op` metrics that need to be preserved precisely.
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merged.metrics[k] = v;
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}
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}
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writeFileSync(output, `${JSON.stringify(merged, null, 2)}\n`);
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console.log(`merged ${inputs.length} summaries → ${output}`);
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