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1 line
10 KiB
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{"code":"var __defProp=Object.defineProperty;var __name=(target,value)=>__defProp(target,\"name\",{value,configurable:true});import{mkdir,writeFile}from\"node:fs/promises\";import path from\"node:path\";import{spawn}from\"node:child_process\";import{setTimeout as sleep}from\"node:timers/promises\";import lighthouse from\"lighthouse\";import{launch}from\"chrome-launcher\";const VARIANTS=[{id:\"light-mobile\",theme:\"light\",device:\"mobile\",screenEmulation:{mobile:true,width:360,height:800,deviceScaleFactor:2,disabled:false}},{id:\"dark-mobile\",theme:\"dark\",device:\"mobile\",screenEmulation:{mobile:true,width:360,height:800,deviceScaleFactor:2,disabled:false}},{id:\"high-contrast-mobile\",theme:\"high-contrast\",device:\"mobile\",screenEmulation:{mobile:true,width:360,height:800,deviceScaleFactor:2,disabled:false}},{id:\"light-desktop\",theme:\"light\",device:\"desktop\",screenEmulation:{mobile:false,width:1350,height:940,deviceScaleFactor:1,disabled:false}},{id:\"dark-desktop\",theme:\"dark\",device:\"desktop\",screenEmulation:{mobile:false,width:1350,height:940,deviceScaleFactor:1,disabled:false}},{id:\"high-contrast-desktop\",theme:\"high-contrast\",device:\"desktop\",screenEmulation:{mobile:false,width:1350,height:940,deviceScaleFactor:1,disabled:false}}];const CATEGORIES=[\"performance\",\"accessibility\",\"best-practices\",\"seo\"];function hasFlag(flag){return process.argv.includes(flag)}__name(hasFlag,\"hasFlag\");function getArg(name){const prefix=`${name}=`;const value=process.argv.find(arg=>arg.startsWith(prefix));return value?value.slice(prefix.length):void 0}__name(getArg,\"getArg\");function median(values){const sorted=[...values].sort((a,b)=>a-b);const mid=Math.floor(sorted.length/2);return sorted.length%2===0?(sorted[mid-1]+sorted[mid])/2:sorted[mid]}__name(median,\"median\");async function startPreviewServerIfNeeded(targetUrl){const forceNoPreview=process.env.LIGHTHOUSE_SKIP_PREVIEW===\"true\";if(forceNoPreview)return null;const isLocal=targetUrl.hostname===\"127.0.0.1\"||targetUrl.hostname===\"localhost\";if(!isLocal)return null;const port=Number(targetUrl.port||\"4321\");const astroCli=path.join(process.cwd(),\"node_modules\",\"astro\",\"astro.js\");const child=spawn(process.execPath,[astroCli,\"preview\",\"--host\",\"127.0.0.1\",\"--port\",String(port)],{cwd:process.cwd(),stdio:\"pipe\",env:process.env});let ready=false;child.stdout.on(\"data\",buf=>{const line=String(buf);if(line.includes(\"Local\")||line.includes(\"localhost\")||line.includes(\"127.0.0.1\")){ready=true}});child.stderr.on(\"data\",()=>{});for(let i=0;i<30;i+=1){if(ready)break;await sleep(500)}await sleep(1500);return()=>{child.kill(\"SIGTERM\")}}__name(startPreviewServerIfNeeded,\"startPreviewServerIfNeeded\");async function run(){const outputDir=getArg(\"--out\")||process.env.LIGHTHOUSE_OUTPUT_DIR||\"lighthouse-reports\";const target=getArg(\"--url\")||process.env.LIGHTHOUSE_TARGET_URL||\"http://127.0.0.1:4321/\";const runCount=Number(getArg(\"--runs\")||process.env.LIGHTHOUSE_RUNS||\"3\");const assert100=hasFlag(\"--assert-100\");if(!Number.isInteger(runCount)||runCount<1){throw new Error(`Invalid run count: ${runCount}`)}const targetUrl=new URL(target);await mkdir(outputDir,{recursive:true});const stopPreview=await startPreviewServerIfNeeded(targetUrl);try{const summary={target,runCount,generatedAt:new Date().toISOString(),variants:{}};let gateFailed=false;for(const variant of VARIANTS){const byCategory={performance:[],accessibility:[],\"best-practices\":[],seo:[]};for(let runIndex=1;runIndex<=runCount;runIndex+=1){let chrome;for(let attempt=1;attempt<=3;attempt+=1){try{chrome=await launch({chromeFlags:[\"--headless=new\",\"--disable-gpu\",\"--no-sandbox\"]});break}catch(error){const message=String(error||\"\");if(!message.includes(\"EPERM\")||attempt===3){throw error}await sleep(250*attempt)}}if(!chrome){throw new Error(`Failed to launch Chrome for ${variant.id} run ${runIndex}.`)}try{let result;for(let attempt=1;attempt<=3;attempt+=1){try{result=await lighthouse(target,{port:chrome.port,logLevel:\"error\",output:\"json\",onlyCategories:CATEGORIES,formFactor:variant.device,screenEmulation:variant.screenEmulation,throttlingMethod:\"simulate\",disableStorageReset:true,extraHeaders:{Cookie:`site_theme=${encodeURIComponent(variant.theme)}`}});break}catch(error){const message=String(error||\"\");if(!message.includes(\"EPERM\")||attempt===3){throw error}await sleep(250*attempt)}}if(!result?.lhr||typeof result.report!==\"string\"){throw new Error(`Lighthouse did not produce a report for ${variant.id} run ${runIndex}.`)}const lhr=result.lhr;const reportPath=path.join(outputDir,`${variant.id}.run-${runIndex}.json`);await writeFile(reportPath,result.report,\"utf8\");for(const category of CATEGORIES){const score=lhr.categories?.[category]?.score??0;byCategory[category].push(Math.round(score*100))}}finally{chrome.kill()}}const medians=Object.fromEntries(CATEGORIES.map(category=>[category,median(byCategory[category])]));if(assert100){for(const category of CATEGORIES){if(medians[category]<100){gateFailed=true}}}summary.variants={...summary.variants,[variant.id]:{theme:variant.theme,device:variant.device,scoresByRun:byCategory,medianScores:medians}}}await 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