/
registerMissing.ts
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/
registerMissing.ts
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import colors from 'picocolors'
import _debug from 'debug'
import {
runOptimizeDeps,
getOptimizedDepPath,
getHash,
depsFromOptimizedDepInfo,
newDepOptimizationProcessing,
loadCachedDepOptimizationMetadata,
createOptimizedDepsMetadata,
addOptimizedDepInfo,
discoverProjectDependencies,
depsLogString,
debuggerViteDeps as debug
} from '.'
import type {
DepOptimizationProcessing,
OptimizedDepInfo,
OptimizedDeps
} from '.'
import type { ViteDevServer } from '..'
const isDebugEnabled = _debug('vite:deps').enabled
/**
* The amount to wait for requests to register newly found dependencies before triggering
* a re-bundle + page reload
*/
const debounceMs = 100
export function createOptimizedDeps(server: ViteDevServer): OptimizedDeps {
const { config } = server
const { logger } = config
const sessionTimestamp = Date.now().toString()
const cachedMetadata = loadCachedDepOptimizationMetadata(config)
const optimizedDeps: OptimizedDeps = {
metadata:
cachedMetadata || createOptimizedDepsMetadata(config, sessionTimestamp),
registerMissingImport
}
let handle: NodeJS.Timeout | undefined
let newDepsDiscovered = false
let newDepsToLog: string[] = []
let newDepsToLogHandle: NodeJS.Timeout | undefined
const logNewlyDiscoveredDeps = () => {
if (newDepsToLog.length) {
config.logger.info(
colors.green(
`✨ new dependencies optimized: ${depsLogString(newDepsToLog)}`
),
{
timestamp: true
}
)
newDepsToLog = []
}
}
let depOptimizationProcessing = newDepOptimizationProcessing()
let depOptimizationProcessingQueue: DepOptimizationProcessing[] = []
const resolveEnqueuedProcessingPromises = () => {
// Resolve all the processings (including the ones which were delayed)
for (const processing of depOptimizationProcessingQueue) {
processing.resolve()
}
depOptimizationProcessingQueue = []
}
let enqueuedRerun: (() => void) | undefined
let currentlyProcessing = false
// If there wasn't a cache or it is outdated, perform a fast scan with esbuild
// to quickly find project dependencies and do a first optimize run
if (!cachedMetadata) {
currentlyProcessing = true
const scanPhaseProcessing = newDepOptimizationProcessing()
optimizedDeps.scanProcessing = scanPhaseProcessing.promise
const warmUp = async () => {
try {
debug(colors.green(`scanning for dependencies...`), {
timestamp: true
})
const { metadata } = optimizedDeps
const discovered = await discoverProjectDependencies(
config,
sessionTimestamp
)
// Respect the scan phase discover order to improve reproducibility
for (const depInfo of Object.values(discovered)) {
addOptimizedDepInfo(metadata, 'discovered', {
...depInfo,
processing: depOptimizationProcessing.promise
})
}
debug(
colors.green(
`dependencies found: ${depsLogString(Object.keys(discovered))}`
),
{
timestamp: true
}
)
scanPhaseProcessing.resolve()
optimizedDeps.scanProcessing = undefined
runOptimizer()
} catch (e) {
logger.error(e.message)
if (optimizedDeps.scanProcessing) {
scanPhaseProcessing.resolve()
optimizedDeps.scanProcessing = undefined
}
}
}
setTimeout(warmUp, 0)
}
async function runOptimizer(isRerun = false) {
// Ensure that rerun is called sequentially
enqueuedRerun = undefined
currentlyProcessing = true
// Ensure that a rerun will not be issued for current discovered deps
if (handle) clearTimeout(handle)
// a succesful completion of the optimizeDeps rerun will end up
// creating new bundled version of all current and discovered deps
// in the cache dir and a new metadata info object assigned
// to optimizeDeps.metadata. A fullReload is only issued if
// the previous bundled dependencies have changed.
// if the rerun fails, optimizeDeps.metadata remains untouched,
// current discovered deps are cleaned, and a fullReload is issued
let { metadata } = optimizedDeps
// All deps, previous known and newly discovered are rebundled,
// respect insertion order to keep the metadata file stable
const newDeps: Record<string, OptimizedDepInfo> = {}
// Clone optimized info objects, fileHash, browserHash may be changed for them
for (const dep of Object.keys(metadata.optimized)) {
newDeps[dep] = { ...metadata.optimized[dep] }
}
for (const dep of Object.keys(metadata.discovered)) {
// Clone the discovered info discarding its processing promise
const { processing, ...info } = metadata.discovered[dep]
newDeps[dep] = info
}
newDepsDiscovered = false
// Add the current depOptimizationProcessing to the queue, these
// promises are going to be resolved once a rerun is committed
depOptimizationProcessingQueue.push(depOptimizationProcessing)
// Create a new promise for the next rerun, discovered missing
// dependencies will be asigned this promise from this point
depOptimizationProcessing = newDepOptimizationProcessing()
try {
const processingResult = await runOptimizeDeps(config, newDeps)
const newData = processingResult.metadata
// After a re-optimization, if the internal bundled chunks change a full page reload
// is required. If the files are stable, we can avoid the reload that is expensive
// for large applications. Comparing their fileHash we can find out if it is safe to
// keep the current browser state.
const needsReload =
metadata.hash !== newData.hash ||
Object.keys(metadata.optimized).some((dep) => {
return (
metadata.optimized[dep].fileHash !== newData.optimized[dep].fileHash
)
})
const commitProcessing = async () => {
await processingResult.commit()
// While optimizeDeps is running, new missing deps may be discovered,
// in which case they will keep being added to metadata.discovered
for (const id in metadata.discovered) {
if (!newData.optimized[id]) {
addOptimizedDepInfo(newData, 'discovered', metadata.discovered[id])
}
}
// If we don't reload the page, we need to keep browserHash stable
if (!needsReload) {
newData.browserHash = metadata.browserHash
for (const dep in newData.chunks) {
newData.chunks[dep].browserHash = metadata.browserHash
}
for (const dep in newData.optimized) {
newData.optimized[dep].browserHash = (
metadata.optimized[dep] || metadata.discovered[dep]
).browserHash
}
}
// Commit hash and needsInterop changes to the discovered deps info
// object. Allow for code to await for the discovered processing promise
// and use the information in the same object
for (const o in newData.optimized) {
const discovered = metadata.discovered[o]
if (discovered) {
const optimized = newData.optimized[o]
discovered.browserHash = optimized.browserHash
discovered.fileHash = optimized.fileHash
discovered.needsInterop = optimized.needsInterop
discovered.processing = undefined
}
}
if (isRerun) {
newDepsToLog.push(
...Object.keys(newData.optimized).filter(
(dep) => !metadata.optimized[dep]
)
)
}
metadata = optimizedDeps.metadata = newData
resolveEnqueuedProcessingPromises()
}
if (!needsReload) {
await commitProcessing()
if (!isDebugEnabled) {
if (newDepsToLogHandle) clearTimeout(newDepsToLogHandle)
newDepsToLogHandle = setTimeout(() => {
newDepsToLogHandle = undefined
logNewlyDiscoveredDeps()
}, 2 * debounceMs)
} else {
debug(colors.green(`✨ optimized dependencies unchanged`), {
timestamp: true
})
}
} else {
if (newDepsDiscovered) {
// There are newly discovered deps, and another rerun is about to be
// excecuted. Avoid the current full reload discarding this rerun result
// We don't resolve the processing promise, as they will be resolved
// once a rerun is committed
processingResult.cancel()
debug(
colors.green(
`✨ delaying reload as new dependencies have been found...`
),
{
timestamp: true
}
)
} else {
await commitProcessing()
if (!isDebugEnabled) {
if (newDepsToLogHandle) clearTimeout(newDepsToLogHandle)
newDepsToLogHandle = undefined
logNewlyDiscoveredDeps()
}
logger.info(
colors.green(`✨ optimized dependencies changed. reloading`),
{
timestamp: true
}
)
fullReload()
}
}
} catch (e) {
logger.error(
colors.red(`error while updating dependencies:\n${e.stack}`),
{ timestamp: true, error: e }
)
resolveEnqueuedProcessingPromises()
// Reset missing deps, let the server rediscover the dependencies
metadata.discovered = {}
}
currentlyProcessing = false
// @ts-ignore
enqueuedRerun?.()
}
function fullReload() {
// Cached transform results have stale imports (resolved to
// old locations) so they need to be invalidated before the page is
// reloaded.
server.moduleGraph.invalidateAll()
server.ws.send({
type: 'full-reload',
path: '*'
})
}
async function rerun() {
// debounce time to wait for new missing deps finished, issue a new
// optimization of deps (both old and newly found) once the previous
// optimizeDeps processing is finished
const deps = Object.keys(optimizedDeps.metadata.discovered)
const depsString = depsLogString(deps)
debug(colors.green(`new dependencies found: ${depsString}`), {
timestamp: true
})
runOptimizer(true)
}
function getDiscoveredBrowserHash(
hash: string,
deps: Record<string, string>,
missing: Record<string, string>
) {
return getHash(
hash + JSON.stringify(deps) + JSON.stringify(missing) + sessionTimestamp
)
}
function registerMissingImport(
id: string,
resolved: string,
ssr?: boolean
): OptimizedDepInfo {
if (optimizedDeps.scanProcessing) {
config.logger.error(
'Vite internal error: registering missing import before initial scanning is over'
)
}
const { metadata } = optimizedDeps
const optimized = metadata.optimized[id]
if (optimized) {
return optimized
}
const chunk = metadata.chunks[id]
if (chunk) {
return chunk
}
let missing = metadata.discovered[id]
if (missing) {
// We are already discover this dependency
// It will be processed in the next rerun call
return missing
}
newDepsDiscovered = true
missing = addOptimizedDepInfo(metadata, 'discovered', {
id,
file: getOptimizedDepPath(id, server.config),
src: resolved,
// Assing a browserHash to this missing dependency that is unique to
// the current state of known + missing deps. If its optimizeDeps run
// doesn't alter the bundled files of previous known dependendencies,
// we don't need a full reload and this browserHash will be kept
browserHash: getDiscoveredBrowserHash(
metadata.hash,
depsFromOptimizedDepInfo(metadata.optimized),
depsFromOptimizedDepInfo(metadata.discovered)
),
// loading of this pre-bundled dep needs to await for its processing
// promise to be resolved
processing: depOptimizationProcessing.promise
})
// Debounced rerun, let other missing dependencies be discovered before
// the running next optimizeDeps
enqueuedRerun = undefined
if (handle) clearTimeout(handle)
if (newDepsToLogHandle) clearTimeout(newDepsToLogHandle)
newDepsToLogHandle = undefined
handle = setTimeout(() => {
handle = undefined
enqueuedRerun = rerun
if (!currentlyProcessing) {
enqueuedRerun()
}
}, debounceMs)
// Return the path for the optimized bundle, this path is known before
// esbuild is run to generate the pre-bundle
return missing
}
return optimizedDeps
}