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import alias, { Alias } from "@rollup/plugin-alias"
import { nodeResolve } from "@rollup/plugin-node-resolve"
import replace from "@rollup/plugin-replace"
import glob from "fast-glob"
import { resolve } from "node:path"
import { Plugin, RollupOptions } from "rollup"
import esbuild from "rollup-plugin-esbuild"
import { preserveDirectives } from "rollup-plugin-preserve-directives"
interface Options {
dir: string
aliases: Alias[]
}
export async function getConfig(options: Options): Promise<RollupOptions> {
const { dir, aliases } = options
const packageJson = await import(resolve(dir, "package.json"))
const isCli = packageJson.bin !== undefined
const plugins: Plugin[] = [
nodeResolve({ extensions: [".ts", ".tsx", ".js", ".jsx"] }),
alias({ entries: aliases }),
esbuild({
sourceMap: true,
tsconfig: resolve(dir, "tsconfig.json"),
platform: isCli ? "node" : "browser",
}),
replace({ preventAssignment: true }),
preserveDirectives(),
{
name: "@rollup-plugin/remove-empty-chunks",
generateBundle(_, bundle) {
for (const [name, chunk] of Object.entries(bundle)) {
if (chunk.type === "chunk" && chunk.code.length === 0) {
delete bundle[name]
}
}
},
},
]
const deps = [
...Object.keys(packageJson.dependencies ?? {}),
...Object.keys(packageJson.peerDependencies ?? {}),
]
const external = deps.length ? new RegExp(`^(${deps.join("|")})`) : undefined
const entries = await glob("src/**/*.{ts,tsx}")
const outputs: RollupOptions["output"] = [
{
format: "es",
exports: "named",
entryFileNames: "[name].js",
dir: resolve(dir, "dist/esm"),
preserveModules: true,
},
]
if (!isCli) {
outputs.push({
format: "cjs",
exports: "named",
entryFileNames: "[name].cjs",
dir: resolve(dir, "dist/cjs"),
preserveModules: true,
})
}
return {
input: entries,
onLog(level, log, handler) {
if (log.code === "EMPTY_BUNDLE") return
return handler(level, log)
},
onwarn(warning, warn) {
if (warning.code === "SOURCEMAP_ERROR") return
if (warning.code === "MODULE_LEVEL_DIRECTIVE") return
warn(warning)
},
output: outputs,
external,
plugins,
}
}
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