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src_files.ts
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src_files.ts
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/* eslint-disable max-lines */
import { dirname, basename, normalize } from 'path'
import * as process from 'process'
import { not as notJunk } from 'junk'
import precinct from 'precinct'
import semver from 'semver'
import { FeatureFlags } from '../../../../feature_flags.js'
import { nonNullable } from '../../../../utils/non_nullable.js'
import { filterExcludedPaths, getPathsOfIncludedFiles } from '../../utils/included_files.js'
import { getPackageJson, PackageJson } from '../../utils/package_json.js'
import { getNewCache, TraversalCache } from '../../utils/traversal_cache.js'
import type { GetSrcFilesFunction } from '../index.js'
import { listImports } from './list_imports.js'
import { resolvePathPreserveSymlinks } from './resolve.js'
import { getDependencyPathsForDependency } from './traverse.js'
import { getTreeFiles } from './tree_files.js'
import { shouldTreeShake } from './tree_shake.js'
// Retrieve the paths to the Node.js files to zip.
// We only include the files actually needed by the function because AWS Lambda
// has a size limit for the zipped file. It also makes cold starts faster.
export const getSrcFiles: GetSrcFilesFunction = async function ({
config,
featureFlags,
mainFile,
name,
pluginsModulesPath,
srcDir,
srcPath,
stat,
}) {
const { includedFiles = [], includedFilesBasePath } = config
const { exclude: excludedPaths, paths: includedFilePaths } = await getPathsOfIncludedFiles(
includedFiles,
includedFilesBasePath,
)
const [treeFiles, depFiles] = await Promise.all([
getTreeFiles(srcPath, stat),
getDependencies({ featureFlags, functionName: name, mainFile, pluginsModulesPath, srcDir }),
])
const files = [...treeFiles, ...depFiles].map(normalize)
const uniqueFiles = [...new Set(files)]
// We sort so that the archive's checksum is deterministic.
// Mutating is fine since `Array.filter()` returns a shallow copy
const filteredFiles = uniqueFiles.filter(isNotJunk).sort()
const includedPaths = filterExcludedPaths([...filteredFiles, ...includedFilePaths], excludedPaths)
return includedPaths
}
// Remove temporary files like *~, *.swp, etc.
const isNotJunk = function (file: string) {
return notJunk(basename(file))
}
// Retrieve all the files recursively required by a Node.js file
const getDependencies = async function ({
featureFlags,
functionName,
mainFile,
pluginsModulesPath,
srcDir,
}: {
featureFlags: FeatureFlags
functionName: string
mainFile: string
pluginsModulesPath?: string
srcDir: string
}) {
const packageJson = await getPackageJson(srcDir)
const state = getNewCache()
try {
return await getFileDependencies({
featureFlags,
functionName,
path: mainFile,
packageJson,
pluginsModulesPath,
state,
})
} catch (error) {
error.message = `In file "${mainFile}"\n${error.message}`
throw error
}
}
const paperwork = async (path: string) => {
if (semver.lt(process.version, '18.0.0')) {
return await precinct.paperwork(path, { includeCore: false })
}
// for Node v18, we're temporarily using our own mechanism to filter out core dependencies, until
// https://github.com/dependents/node-precinct/pull/108 landed
const modules = await precinct.paperwork(path, { includeCore: true })
return modules.filter((moduleName) => {
if (moduleName.startsWith('node:')) {
return false
}
// only require("node:test") refers to the
// builtin, require("test") doesn't
if (moduleName === 'test') {
return true
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const isNativeModule = moduleName in (process as any).binding('natives')
return !isNativeModule
})
}
const getFileDependencies = async function ({
featureFlags,
functionName,
path,
packageJson,
pluginsModulesPath,
state,
treeShakeNext = false,
}: {
featureFlags: FeatureFlags
functionName: string
path: string
packageJson: PackageJson
pluginsModulesPath?: string
state: TraversalCache
treeShakeNext?: boolean
}): Promise<string[]> {
if (state.localFiles.has(path)) {
return []
}
state.localFiles.add(path)
const basedir = dirname(path)
const dependencies = featureFlags.parseWithEsbuild ? await listImports({ functionName, path }) : await paperwork(path)
const depsPaths = await Promise.all(
dependencies.filter(nonNullable).map((dependency) =>
getImportDependencies({
dependency,
basedir,
featureFlags,
functionName,
packageJson,
pluginsModulesPath,
state,
treeShakeNext,
}),
),
)
return depsPaths.flat()
}
const getImportDependencies = function ({
dependency,
basedir,
featureFlags,
functionName,
packageJson,
pluginsModulesPath,
state,
treeShakeNext,
}: {
dependency: string
basedir: string
featureFlags: FeatureFlags
functionName: string
packageJson: PackageJson
pluginsModulesPath?: string
state: TraversalCache
treeShakeNext: boolean
}): Promise<string[]> {
const shouldTreeShakeNext = treeShakeNext || isNextOnNetlify(dependency)
if (shouldTreeShake(dependency, shouldTreeShakeNext)) {
return getTreeShakedDependencies({
dependency,
basedir,
featureFlags,
functionName,
packageJson,
pluginsModulesPath,
state,
treeShakeNext: shouldTreeShakeNext,
})
}
return getDependencyPathsForDependency({ dependency, basedir, state, packageJson, pluginsModulesPath })
}
const isNextOnNetlify = function (dependency: string) {
return basename(dependency, '.js') === 'renderNextPage'
}
// When a file requires another one, we apply the top-level logic recursively
const getTreeShakedDependencies = async function ({
dependency,
basedir,
featureFlags,
functionName,
packageJson,
pluginsModulesPath,
state,
treeShakeNext,
}: {
dependency: string
basedir: string
featureFlags: FeatureFlags
functionName: string
packageJson: PackageJson
pluginsModulesPath?: string
state: TraversalCache
treeShakeNext: boolean
}) {
const path = await resolvePathPreserveSymlinks(dependency, [basedir, pluginsModulesPath].filter(nonNullable))
const depsPath = await getFileDependencies({
featureFlags,
functionName,
path,
packageJson,
pluginsModulesPath,
state,
treeShakeNext,
})
return [path, ...depsPath]
}
/* eslint-enable max-lines */