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index.ts
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index.ts
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import * as path from 'path'
import * as fs from 'fs-extra'
import * as _ from 'lodash'
import * as globby from 'globby'
import { ServerlessOptions, ServerlessInstance, ServerlessFunction } from './types'
import * as typescript from './typescript'
import { watchFiles } from './watchFiles'
// Folders
const serverlessFolder = '.serverless'
const buildFolder = '.build'
export class TypeScriptPlugin {
private originalServicePath: string
private isWatching: boolean
serverless: ServerlessInstance
options: ServerlessOptions
commands: { [key: string]: any }
hooks: { [key: string]: Function }
constructor(serverless: ServerlessInstance, options: ServerlessOptions) {
this.serverless = serverless
this.options = options
this.hooks = {
'before:run:run': async () => {
await this.compileTs()
},
'before:offline:start': async () => {
await this.compileTs()
this.watchAll()
},
'before:offline:start:init': async () => {
await this.compileTs()
this.watchAll()
},
'before:package:createDeploymentArtifacts': this.compileTs.bind(this),
'after:package:createDeploymentArtifacts': this.cleanup.bind(this),
'before:deploy:function:packageFunction': this.compileTs.bind(this),
'after:deploy:function:packageFunction': this.cleanup.bind(this),
'before:invoke:local:invoke': async () => {
const emitedFiles = await this.compileTs()
if (this.isWatching) {
emitedFiles.forEach(filename => {
const module = require.resolve(path.resolve(this.originalServicePath, filename))
delete require.cache[module]
})
}
},
'after:invoke:local:invoke': () => {
if (this.options.watch) {
this.watchFunction()
this.serverless.cli.log('Waiting for changes ...')
}
}
}
}
get functions() {
return this.options.function
? { [this.options.function] : this.serverless.service.functions[this.options.function] }
: this.serverless.service.functions
}
get rootFileNames() {
return typescript.extractFileNames(this.originalServicePath, this.serverless.service.provider.name, this.functions)
}
prepare() {
// exclude serverless-plugin-typescript
const functions = this.functions
for (const fnName in functions) {
const fn = functions[fnName]
fn.package = fn.package || {
exclude: [],
include: [],
}
// Add plugin to excluded packages or an empty array if exclude is undefined
fn.package.exclude = _.uniq([...fn.package.exclude || [], 'node_modules/serverless-plugin-typescript'])
}
}
async watchFunction(): Promise<void> {
if (this.isWatching) {
return
}
this.serverless.cli.log(`Watch function ${this.options.function}...`)
this.isWatching = true
watchFiles(this.rootFileNames, this.originalServicePath, () => {
this.serverless.pluginManager.spawn('invoke:local')
})
}
async watchAll(): Promise<void> {
if (this.isWatching) {
return
}
this.serverless.cli.log(`Watching typescript files...`)
this.isWatching = true
watchFiles(this.rootFileNames, this.originalServicePath, () => {
this.compileTs()
})
}
async compileTs(): Promise<string[]> {
this.prepare()
this.serverless.cli.log('Compiling with Typescript...')
if (!this.originalServicePath) {
// Save original service path and functions
this.originalServicePath = this.serverless.config.servicePath
// Fake service path so that serverless will know what to zip
this.serverless.config.servicePath = path.join(this.originalServicePath, buildFolder)
}
const tsconfig = typescript.getTypescriptConfig(
this.originalServicePath,
this.isWatching ? null : this.serverless.cli
)
tsconfig.outDir = buildFolder
const emitedFiles = await typescript.run(this.rootFileNames, tsconfig)
await this.copyExtras()
this.serverless.cli.log('Typescript compiled.')
return emitedFiles
}
async copyExtras() {
const outPkgPath = path.resolve(path.join(buildFolder, 'package.json'))
const outModulesPath = path.resolve(path.join(buildFolder, 'node_modules'))
// Link or copy node_modules and package.json to .build so Serverless can
// exlcude devDeps during packaging
if (!fs.existsSync(outModulesPath)) {
await this.linkOrCopy(path.resolve('node_modules'), outModulesPath, 'junction')
}
if (!fs.existsSync(outPkgPath)) {
await this.linkOrCopy(path.resolve('package.json'), outPkgPath, 'file')
}
// include any "extras" from the "include" section
if (this.serverless.service.package.include && this.serverless.service.package.include.length > 0) {
const files = await globby(this.serverless.service.package.include)
for (const filename of files) {
const destFileName = path.resolve(path.join(buildFolder, filename))
const dirname = path.dirname(destFileName)
if (!fs.existsSync(dirname)) {
fs.mkdirpSync(dirname)
}
if (!fs.existsSync(destFileName)) {
fs.copySync(path.resolve(filename), path.resolve(path.join(buildFolder, filename)))
}
}
}
}
async moveArtifacts(): Promise<void> {
await fs.copy(
path.join(this.originalServicePath, buildFolder, serverlessFolder),
path.join(this.originalServicePath, serverlessFolder)
)
if (this.options.function) {
const fn = this.serverless.service.functions[this.options.function]
const basename = path.basename(fn.package.artifact)
fn.package.artifact = path.join(
this.originalServicePath,
serverlessFolder,
path.basename(fn.package.artifact)
)
return
}
if (this.serverless.service.package.individually) {
const functionNames = this.serverless.service.getAllFunctions()
functionNames.forEach(name => {
this.serverless.service.functions[name].package.artifact = path.join(
this.originalServicePath,
serverlessFolder,
path.basename(this.serverless.service.functions[name].package.artifact)
)
})
return
}
this.serverless.service.package.artifact = path.join(
this.originalServicePath,
serverlessFolder,
path.basename(this.serverless.service.package.artifact)
)
}
async cleanup(): Promise<void> {
await this.moveArtifacts()
// Restore service path
this.serverless.config.servicePath = this.originalServicePath
// Remove temp build folder
fs.removeSync(path.join(this.originalServicePath, buildFolder))
}
/**
* Attempt to symlink a given path or directory and copy if it fails with an
* `EPERM` error.
*/
private async linkOrCopy(
srcPath: string,
dstPath: string,
type?: 'dir' | 'junction' | 'file'
): Promise<void> {
return fs.symlink(srcPath, dstPath, type)
.catch(error => {
if (error.code === 'EPERM' && error.errno === -4048) {
return fs.copy(srcPath, dstPath)
}
throw error
})
}
}
module.exports = TypeScriptPlugin