@posthog/nextjs-config/dist/config.mjs

NextJS configuration helper for Posthog 🦔

import { PosthogWebpackPlugin, resolveConfig } from "@posthog/webpack-plugin";
import { hasCompilerHook, isTurbopackEnabled, processSourceMaps } from "./utils.mjs";
import { stripDanglingSourceMapComments } from "./strip-sourcemap-comments.mjs";
const INVOCATION_TIMEOUT_MS = 5000;
function withPostHogConfig(userNextConfig, posthogConfig) {
    const resolvedConfig = resolveConfig(posthogConfig);
    const sourceMapEnabled = resolvedConfig.sourcemaps.enabled;
    const isCompilerHookSupported = hasCompilerHook();
    const turbopackEnabled = isTurbopackEnabled();
    if (turbopackEnabled && !isCompilerHookSupported) console.warn('[@posthog/nextjs-config] Turbopack support is only available with next version >= 15.4.1');
    let invoked = false;
    const nextConfigFn = async (phase, param)=>{
        let { defaultConfig } = param;
        invoked = true;
        const { webpack: userWebPackConfig, compiler: userCompilerConfig, distDir, ...userConfig } = await resolveUserConfig(userNextConfig, phase, defaultConfig);
        const nextConfig = {
            ...userConfig,
            distDir,
            webpack: withWebpackConfig(userWebPackConfig, resolvedConfig),
            compiler: withCompilerConfig(userCompilerConfig, resolvedConfig)
        };
        if (turbopackEnabled && sourceMapEnabled) nextConfig.productionBrowserSourceMaps = true;
        return nextConfig;
    };
    if ('function' == typeof setTimeout) {
        var _timer_unref;
        const timer = setTimeout(()=>{
            if (!invoked) console.warn("[@posthog/nextjs-config] withPostHogConfig was loaded but Next.js never invoked the config function it returns. This usually means another config wrapper (e.g. withNextIntl, withSentryConfig) is wrapping withPostHogConfig and producing a plain object that drops the PostHog hooks. Move withPostHogConfig(...) to be the OUTERMOST wrapper in next.config.js so source maps upload and other build hooks run. See https://github.com/PostHog/posthog-js/issues/3572");
        }, INVOCATION_TIMEOUT_MS);
        null == (_timer_unref = timer.unref) || _timer_unref.call(timer);
    }
    return nextConfigFn;
}
function resolveUserConfig(userNextConfig, phase, defaultConfig) {
    if ('function' == typeof userNextConfig) {
        const maybePromise = userNextConfig(phase, {
            defaultConfig
        });
        if (maybePromise instanceof Promise) return maybePromise;
        return Promise.resolve(maybePromise);
    }
    if ('object' == typeof userNextConfig) return Promise.resolve(userNextConfig);
    throw new Error('Invalid user config');
}
function withWebpackConfig(userWebpackConfig, posthogConfig) {
    const defaultWebpackConfig = userWebpackConfig || ((config)=>config);
    const sourceMapEnabled = posthogConfig.sourcemaps.enabled;
    const turbopackEnabled = isTurbopackEnabled();
    return (config, options)=>{
        const webpackConfig = defaultWebpackConfig(config, options);
        const isServer = options.isServer;
        if (sourceMapEnabled) {
            if (!turbopackEnabled) {
                webpackConfig.plugins = webpackConfig.plugins || [];
                let currentConfig = posthogConfig;
                if (isServer) currentConfig = {
                    ...posthogConfig,
                    sourcemaps: {
                        ...posthogConfig.sourcemaps,
                        deleteAfterUpload: false
                    }
                };
                webpackConfig.plugins.push(new PosthogWebpackPlugin(currentConfig, true));
            }
        }
        return webpackConfig;
    };
}
function withCompilerConfig(userCompilerConfig, posthogConfig) {
    const sourceMapEnabled = posthogConfig.sourcemaps.enabled;
    const turbopackEnabled = isTurbopackEnabled();
    if (sourceMapEnabled && turbopackEnabled && hasCompilerHook()) {
        const newConfig = userCompilerConfig || {};
        const userCompilerHook = null == userCompilerConfig ? void 0 : userCompilerConfig.runAfterProductionCompile;
        newConfig.runAfterProductionCompile = async (config)=>{
            await (null == userCompilerHook ? void 0 : userCompilerHook(config));
            console.debug('Processing source maps from compilation hook...');
            await processSourceMaps(posthogConfig, config.distDir);
            if (posthogConfig.sourcemaps.deleteAfterUpload) await stripDanglingSourceMapComments(config.distDir);
        };
        return newConfig;
    }
    return userCompilerConfig;
}
export { withPostHogConfig };