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build.js: support outputting esbuild metadata file

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ESbuild supports outputting a metadata file which can be used to view
bundle size information using https://esbuild.github.io/analyze/
This commit is contained in:
Jelle van der Waa 2024-06-11 22:36:38 +02:00 • committed by Jelle van der Waa
parent bcb9cc89c5
commit 49c368809e
1 changed files with 6 additions and 1 deletions
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7
build.js
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@ -19,6 +19,7 @@ const esbuild = (await import(useWasm ? 'esbuild-wasm' : 'esbuild')).default;
const parser = (await import('argparse')).default.ArgumentParser(); const parser = (await import('argparse')).default.ArgumentParser();
parser.add_argument('-r', '--rsync', { help: "rsync bundles to ssh target after build", metavar: "HOST" }); parser.add_argument('-r', '--rsync', { help: "rsync bundles to ssh target after build", metavar: "HOST" });
parser.add_argument('-w', '--watch', { action: 'store_true', help: "Enable watch mode", default: process.env.ESBUILD_WATCH === "true" }); parser.add_argument('-w', '--watch', { action: 'store_true', help: "Enable watch mode", default: process.env.ESBUILD_WATCH === "true" });
parser.add_argument('-m', '--metafile', { help: "Enable bundle size information file", metavar: "FILE" });
const args = parser.parse_args(); const args = parser.parse_args();
if (args.rsync) if (args.rsync)
@ -82,6 +83,7 @@ const context = await esbuild.context({
external: ['*.woff', '*.woff2', '*.jpg', '*.svg', '../../assets*'], // Allow external font files which live in ../../static/fonts external: ['*.woff', '*.woff2', '*.jpg', '*.svg', '../../assets*'], // Allow external font files which live in ../../static/fonts
legalComments: 'external', // Move all legal comments to a .LEGAL.txt file legalComments: 'external', // Move all legal comments to a .LEGAL.txt file
loader: { ".js": "jsx" }, loader: { ".js": "jsx" },
metafile: !!args.metafile,
minify: production, minify: production,
nodePaths, nodePaths,
outdir, outdir,
@ -105,7 +107,10 @@ const context = await esbuild.context({
}); });
try { try {
await context.rebuild(); const result = await context.rebuild();
if (args.metafile) {
fs.writeFileSync(args.metafile, JSON.stringify(result.metafile));
}
} catch (e) { } catch (e) {
if (!args.watch) if (!args.watch)
process.exit(1); process.exit(1);