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Build stable and experimental with same command
The goal is to simplify our CI pipeline so that all configurations are built and tested in a single workflow. As a first step, this adds a new build script entry point that builds both the experimental and stable release channels into a single artifacts directory. The script works by wrapping the existing build script (which only builds a single release channel at a time), then post-processing the results to match the desired filesystem layout. A future version of the build script would output the files directly without post-processing. Because many parts of our infra depend on the existing layout of the build artifacts directory, I have left the old workflows untouched. We can incremental migrate to the new layout, then delete the old workflows after we've finished.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| 'use strict'; | ||
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| /* eslint-disable no-for-of-loops/no-for-of-loops */ | ||
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| const fs = require('fs'); | ||
| const {spawnSync} = require('child_process'); | ||
| const tmp = require('tmp'); | ||
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| // Runs the build script for both stable and experimental release channels, | ||
| // by configuring an environment variable. | ||
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| if (process.env.CIRCLE_NODE_TOTAL) { | ||
| // In CI, we use multiple concurrent processes. Allocate half the processes to | ||
| // build the stable channel, and the other half for experimental. Override | ||
| // the environment variables to "trick" the underlying build script. | ||
| const total = parseInt(process.env.CIRCLE_NODE_TOTAL, 10); | ||
| const halfTotal = Math.floor(total / 2); | ||
| const index = parseInt(process.env.CIRCLE_NODE_INDEX, 10); | ||
| if (index < halfTotal) { | ||
| const nodeTotal = halfTotal; | ||
| const nodeIndex = index; | ||
| buildForChannel('stable', nodeTotal, nodeIndex); | ||
| processStable('./build'); | ||
| } else { | ||
| const nodeTotal = total - halfTotal; | ||
| const nodeIndex = index - halfTotal; | ||
| buildForChannel('experimental', nodeTotal, nodeIndex); | ||
| processExperimental('./build'); | ||
| } | ||
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| // TODO: Currently storing artifacts as `./build2` so that it doesn't conflict | ||
| // with old build job. Remove once we migrate rest of build/test pipeline. | ||
| fs.renameSync('./build', './build2'); | ||
| } else { | ||
| // Running locally, no concurrency. Move each channel's build artifacts into | ||
| // a temporary directory so that they don't conflict. | ||
| buildForChannel('stable', '', ''); | ||
| const stableDir = tmp.dirSync().name; | ||
| fs.renameSync('./build', stableDir); | ||
| processStable(stableDir); | ||
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| buildForChannel('experimental', '', ''); | ||
| const experimentalDir = tmp.dirSync().name; | ||
| fs.renameSync('./build', experimentalDir); | ||
| processExperimental(experimentalDir); | ||
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| // Then merge the experimental folder into the stable one. processExperimental | ||
| // will have already removed conflicting files. | ||
| // | ||
| // In CI, merging is handled automatically by CircleCI's workspace feature. | ||
| spawnSync('rsync', ['-ar', experimentalDir + '/', stableDir + '/']); | ||
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| // Now restore the combined directory back to its original name | ||
| // TODO: Currently storing artifacts as `./build2` so that it doesn't conflict | ||
| // with old build job. Remove once we migrate rest of build/test pipeline. | ||
| fs.renameSync(stableDir, './build2'); | ||
| } | ||
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| function buildForChannel(channel, nodeTotal, nodeIndex) { | ||
| spawnSync('node', ['./scripts/rollup/build.js', ...process.argv.slice(2)], { | ||
| stdio: ['pipe', process.stdout, process.stderr], | ||
| env: { | ||
| ...process.env, | ||
| RELEASE_CHANNEL: channel, | ||
| CIRCLE_NODE_TOTAL: nodeTotal, | ||
| CIRCLE_NODE_INDEX: nodeIndex, | ||
| }, | ||
| }); | ||
| } | ||
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| function processStable(buildDir) { | ||
| if (fs.existsSync(buildDir + '/node_modules')) { | ||
| fs.renameSync(buildDir + '/node_modules', buildDir + '/oss-stable'); | ||
| } | ||
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| if (fs.existsSync(buildDir + '/facebook-www')) { | ||
| for (const fileName of fs.readdirSync(buildDir + '/facebook-www')) { | ||
| const filePath = buildDir + '/facebook-www/' + fileName; | ||
| const stats = fs.statSync(filePath); | ||
| if (!stats.isDirectory()) { | ||
| fs.renameSync(filePath, filePath.replace('.js', '.classic.js')); | ||
| } | ||
| } | ||
| } | ||
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| if (fs.existsSync(buildDir + '/sizes')) { | ||
| fs.renameSync(buildDir + '/sizes', buildDir + '/sizes-stable'); | ||
| } | ||
| } | ||
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| function processExperimental(buildDir) { | ||
| if (fs.existsSync(buildDir + '/node_modules')) { | ||
| fs.renameSync(buildDir + '/node_modules', buildDir + '/oss-experimental'); | ||
| } | ||
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| if (fs.existsSync(buildDir + '/facebook-www')) { | ||
| for (const fileName of fs.readdirSync(buildDir + '/facebook-www')) { | ||
| const filePath = buildDir + '/facebook-www/' + fileName; | ||
| const stats = fs.statSync(filePath); | ||
| if (!stats.isDirectory()) { | ||
| fs.renameSync(filePath, filePath.replace('.js', '.modern.js')); | ||
| } | ||
| } | ||
| } | ||
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| if (fs.existsSync(buildDir + '/sizes')) { | ||
| fs.renameSync(buildDir + '/sizes', buildDir + '/sizes-experimental'); | ||
| } | ||
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| // Delete all other artifacts that weren't handled above. We assume they are | ||
| // duplicates of the corresponding artifacts in the stable channel. Ideally, | ||
| // the underlying build script should not have produced these files in the | ||
| // first place. | ||
| for (const pathName of fs.readdirSync(buildDir)) { | ||
| if ( | ||
| pathName !== 'oss-experimental' && | ||
| pathName !== 'facebook-www' && | ||
| pathName !== 'sizes-experimental' | ||
| ) { | ||
| spawnSync('rm', ['-rm', buildDir + '/' + pathName]); | ||
| } | ||
| } | ||
| } |