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[cache components] show when cache components is enabled in the CLI #85047

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Merged
merged 1 commit into from
Oct 19, 2025
Merged

[cache components] show when cache components is enabled in the CLI #85047

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12 changes: 7 additions & 5 deletions packages/next/src/build/index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1115,18 +1115,20 @@ export default async function build(
)

// Always log next version first then start rest jobs
const { envInfo, experimentalFeatures } = await getStartServerInfo({
dir,
dev: false,
debugPrerender,
})
const { envInfo, experimentalFeatures, cacheComponents } =
await getStartServerInfo({
dir,
dev: false,
debugPrerender,
})

logStartInfo({
networkUrl: null,
appUrl: null,
envInfo,
experimentalFeatures,
logBundler: true,
cacheComponents,
})

const typeCheckingOptions: Parameters<typeof startTypeChecking>[0] = {
Expand Down
9 changes: 0 additions & 9 deletions packages/next/src/server/config.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1784,15 +1784,6 @@ function enforceExperimentalFeatures(
(isDefaultConfig && !config.cacheComponents))
) {
config.cacheComponents = true

if (configuredExperimentalFeatures) {
addConfiguredExperimentalFeature(
configuredExperimentalFeatures,
'cacheComponents',
true,
'enabled by `__NEXT_CACHE_COMPONENTS`'
)
}
}

// TODO: Remove this once using the debug channel is the default.
Expand Down
29 changes: 23 additions & 6 deletions packages/next/src/server/lib/app-info-log.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14,28 +14,40 @@ export function logStartInfo({
envInfo,
experimentalFeatures,
logBundler,
cacheComponents,
}: {
networkUrl: string | null
appUrl: string | null
envInfo?: string[]
experimentalFeatures?: ConfiguredExperimentalFeature[]
logBundler: boolean
cacheComponents?: boolean
}) {
let bundlerSuffix = ''
let versionSuffix = ''
const parts = []

if (logBundler) {
if (process.env.TURBOPACK) {
bundlerSuffix = ' (Turbopack)'
parts.push('Turbopack')
} else if (process.env.NEXT_RSPACK) {
bundlerSuffix = ' (Rspack)'
parts.push('Rspack')
} else {
bundlerSuffix = ' (webpack)'
parts.push('webpack')
}
}

if (cacheComponents) {
parts.push('Cache Components')
}

if (parts.length > 0) {
versionSuffix = ` (${parts.join(', ')})`
}

Log.bootstrap(
`${bold(
purple(`${Log.prefixes.ready} Next.js ${process.env.__NEXT_VERSION}`)
)}${bundlerSuffix}`
)}${versionSuffix}`
)
if (appUrl) {
Log.bootstrap(`- Local: ${appUrl}`)
Expand Down Expand Up @@ -91,9 +103,11 @@ export async function getStartServerInfo({
}): Promise<{
envInfo?: string[]
experimentalFeatures?: ConfiguredExperimentalFeature[]
cacheComponents?: boolean
}> {
let experimentalFeatures: ConfiguredExperimentalFeature[] = []
await loadConfig(
let cacheComponents = false
const config = await loadConfig(
dev ? PHASE_DEVELOPMENT_SERVER : PHASE_PRODUCTION_BUILD,
dir,
{
Expand All @@ -107,6 +121,8 @@ export async function getStartServerInfo({
}
)

cacheComponents = !!config.cacheComponents

// we need to reset env if we are going to create
// the worker process with the esm loader so that the
// initial env state is correct
Expand All @@ -119,5 +135,6 @@ export async function getStartServerInfo({
return {
envInfo,
experimentalFeatures,
cacheComponents,
}
}
77 changes: 26 additions & 51 deletions test/production/app-dir/build-output-prerender/build-output-prerender.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -18,59 +18,48 @@ describe('build-output-prerender', () => {

beforeAll(() => next.build())

// TODO: Re-enable this test once we move the cache components flag
it.skip('prints only the user-selected experimental flags (and the ones enabled via env variable)', async () => {
it('prints only the user-selected experimental flags (and the ones enabled via env variable)', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
"▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (webpack)
"▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)"
`)
}
} else if (pprEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
"▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (webpack)
"▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)"
`)
}
} else {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
- Experiments (use with caution):
✓ cacheComponents"
`)
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(
`"▲ Next.js x.y.z (Turbopack, Cache Components)"`
)
} else if (isRspack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Rspack)
- Experiments (use with caution):
✓ cacheComponents"
"▲ Next.js x.y.z (Rspack, Cache Components)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (webpack)
- Experiments (use with caution):
✓ cacheComponents"
`)
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(
`"▲ Next.js x.y.z (webpack, Cache Components)"`
)
}
}
})
Expand Down Expand Up @@ -116,15 +105,13 @@ describe('build-output-prerender', () => {

beforeAll(() => next.build())

// TODO: Re-enable this test once we move the cache components flag
it.skip('prints a warning and the customized experimental flags', async () => {
it('prints a warning and the customized experimental flags', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
Expand All @@ -133,9 +120,8 @@ describe('build-output-prerender', () => {
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (webpack)
▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
Expand All @@ -146,9 +132,8 @@ describe('build-output-prerender', () => {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
Expand All @@ -157,9 +142,8 @@ describe('build-output-prerender', () => {
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (webpack)
▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
✓ ppr (enabled by \`__NEXT_EXPERIMENTAL_PPR\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
Expand All @@ -170,29 +154,26 @@ describe('build-output-prerender', () => {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
⨯ turbopackMinify (disabled by \`--debug-prerender\`)"
`)
} else if (isRspack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Rspack)
▲ Next.js x.y.z (Rspack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (webpack)
▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)"
Expand Down Expand Up @@ -241,21 +222,18 @@ describe('build-output-prerender', () => {

beforeAll(() => next.build())

// TODO: Re-enable this test once we move the cache components flag
it.skip('prints no experimental flags (unless enabled via env variable)', async () => {
it('prints no experimental flags (unless enabled via env variable)', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (Turbopack)
"▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents (enabled by \`__NEXT_CACHE_COMPONENTS\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)"
`)
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"▲ Next.js x.y.z (webpack)
"▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents (enabled by \`__NEXT_CACHE_COMPONENTS\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)"
`)
}
Expand Down Expand Up @@ -300,15 +278,13 @@ describe('build-output-prerender', () => {

beforeAll(() => next.build())

// TODO: Re-enable this test once we move the cache components flag
it.skip('prints a warning and the customized experimental flags', async () => {
it('prints a warning and the customized experimental flags', async () => {
if (cacheComponentsEnabled) {
if (isTurbopack) {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (Turbopack)
▲ Next.js x.y.z (Turbopack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents (enabled by \`__NEXT_CACHE_COMPONENTS\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)
✓ serverSourceMaps (enabled by \`--debug-prerender\`)
Expand All @@ -317,9 +293,8 @@ describe('build-output-prerender', () => {
} else {
expect(getPreambleOutput(next.cliOutput)).toMatchInlineSnapshot(`
"⚠ Prerendering is running in debug mode. Note: This may affect performance and should not be used for production.
▲ Next.js x.y.z (webpack)
▲ Next.js x.y.z (webpack, Cache Components)
- Experiments (use with caution):
✓ cacheComponents (enabled by \`__NEXT_CACHE_COMPONENTS\`)
⨯ prerenderEarlyExit (disabled by \`--debug-prerender\`)
✓ reactDebugChannel (enabled by \`__NEXT_EXPERIMENTAL_DEBUG_CHANNEL\`)
⨯ serverMinification (disabled by \`--debug-prerender\`)
Expand Down
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