mirror of
https://github.com/atom/atom.git
synced 2026-01-24 14:28:14 -05:00
714 lines
24 KiB
JavaScript
714 lines
24 KiB
JavaScript
const path = require('path')
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const _ = require('underscore-plus')
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const fs = require('fs-plus')
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const {Emitter, Disposable} = require('event-kit')
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const TextBuffer = require('text-buffer')
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const {watchPath} = require('./path-watcher')
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const DefaultDirectoryProvider = require('./default-directory-provider')
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const Model = require('./model')
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const GitRepositoryProvider = require('./git-repository-provider')
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// Extended: Represents a project that's opened in Atom.
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//
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// An instance of this class is always available as the `atom.project` global.
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module.exports =
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class Project extends Model {
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/*
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Section: Construction and Destruction
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*/
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constructor ({notificationManager, packageManager, config, applicationDelegate}) {
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super()
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this.notificationManager = notificationManager
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this.applicationDelegate = applicationDelegate
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this.emitter = new Emitter()
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this.buffers = []
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this.rootDirectories = []
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this.repositories = []
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this.directoryProviders = []
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this.defaultDirectoryProvider = new DefaultDirectoryProvider()
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this.repositoryPromisesByPath = new Map()
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this.repositoryProviders = [new GitRepositoryProvider(this, config)]
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this.loadPromisesByPath = {}
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this.watcherPromisesByPath = {}
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this.retiredBufferIDs = new Set()
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this.retiredBufferPaths = new Set()
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this.consumeServices(packageManager)
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}
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destroyed () {
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for (let buffer of this.buffers.slice()) { buffer.destroy() }
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for (let repository of this.repositories.slice()) {
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if (repository != null) repository.destroy()
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}
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for (let path in this.watcherPromisesByPath) {
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this.watcherPromisesByPath[path].then(watcher => { watcher.dispose() })
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}
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this.rootDirectories = []
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this.repositories = []
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}
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reset (packageManager) {
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this.emitter.dispose()
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this.emitter = new Emitter()
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for (let buffer of this.buffers) {
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if (buffer != null) buffer.destroy()
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}
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this.buffers = []
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this.setPaths([])
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this.loadPromisesByPath = {}
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this.retiredBufferIDs = new Set()
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this.retiredBufferPaths = new Set()
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this.consumeServices(packageManager)
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}
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destroyUnretainedBuffers () {
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for (let buffer of this.getBuffers()) {
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if (!buffer.isRetained()) buffer.destroy()
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}
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}
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/*
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Section: Serialization
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*/
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deserialize (state) {
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this.retiredBufferIDs = new Set()
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this.retiredBufferPaths = new Set()
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const handleBufferState = (bufferState) => {
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if (bufferState.shouldDestroyOnFileDelete == null) {
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bufferState.shouldDestroyOnFileDelete = () => atom.config.get('core.closeDeletedFileTabs')
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}
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// Use a little guilty knowledge of the way TextBuffers are serialized.
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// This allows TextBuffers that have never been saved (but have filePaths) to be deserialized, but prevents
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// TextBuffers backed by files that have been deleted from being saved.
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bufferState.mustExist = bufferState.digestWhenLastPersisted !== false
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return TextBuffer.deserialize(bufferState).catch((_) => {
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this.retiredBufferIDs.add(bufferState.id)
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this.retiredBufferPaths.add(bufferState.filePath)
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return null
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})
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}
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const bufferPromises = []
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for (let bufferState of state.buffers) {
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bufferPromises.push(handleBufferState(bufferState))
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}
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return Promise.all(bufferPromises).then(buffers => {
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this.buffers = buffers.filter(Boolean)
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for (let buffer of this.buffers) {
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this.subscribeToBuffer(buffer)
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}
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this.setPaths(state.paths || [], {mustExist: true, exact: true})
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})
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}
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serialize (options = {}) {
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return {
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deserializer: 'Project',
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paths: this.getPaths(),
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buffers: _.compact(this.buffers.map(function (buffer) {
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if (buffer.isRetained()) {
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const isUnloading = options.isUnloading === true
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return buffer.serialize({markerLayers: isUnloading, history: isUnloading})
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}
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}))
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}
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}
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/*
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Section: Event Subscription
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*/
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// Public: Invoke the given callback when the project paths change.
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//
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// * `callback` {Function} to be called after the project paths change.
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// * `projectPaths` An {Array} of {String} project paths.
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//
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// Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
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onDidChangePaths (callback) {
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return this.emitter.on('did-change-paths', callback)
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}
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// Public: Invoke the given callback when a text buffer is added to the
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// project.
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//
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// * `callback` {Function} to be called when a text buffer is added.
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// * `buffer` A {TextBuffer} item.
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//
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// Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
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onDidAddBuffer (callback) {
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return this.emitter.on('did-add-buffer', callback)
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}
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// Public: Invoke the given callback with all current and future text
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// buffers in the project.
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//
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// * `callback` {Function} to be called with current and future text buffers.
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// * `buffer` A {TextBuffer} item.
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//
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// Returns a {Disposable} on which `.dispose()` can be called to unsubscribe.
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observeBuffers (callback) {
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for (let buffer of this.getBuffers()) { callback(buffer) }
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return this.onDidAddBuffer(callback)
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}
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// Extended: Invoke a callback when a filesystem change occurs within any open
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// project path.
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//
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// ```js
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// const disposable = atom.project.onDidChangeFiles(events => {
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// for (const event of events) {
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// // "created", "modified", "deleted", or "renamed"
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// console.log(`Event action: ${event.type}`)
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//
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// // absolute path to the filesystem entry that was touched
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// console.log(`Event path: ${event.path}`)
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//
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// if (event.type === 'renamed') {
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// console.log(`.. renamed from: ${event.oldPath}`)
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// }
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// }
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// }
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//
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// disposable.dispose()
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// ```
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//
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// To watch paths outside of open projects, use the `watchPaths` function instead; see {PathWatcher}.
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//
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// When writing tests against functionality that uses this method, be sure to wait for the
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// {Promise} returned by {getWatcherPromise()} before manipulating the filesystem to ensure that
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// the watcher is receiving events.
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//
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// * `callback` {Function} to be called with batches of filesystem events reported by
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// the operating system.
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// * `events` An {Array} of objects that describe a batch of filesystem events.
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// * `action` {String} describing the filesystem action that occurred. One of `"created"`,
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// `"modified"`, `"deleted"`, or `"renamed"`.
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// * `path` {String} containing the absolute path to the filesystem entry
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// that was acted upon.
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// * `oldPath` For rename events, {String} containing the filesystem entry's
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// former absolute path.
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//
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// Returns a {Disposable} to manage this event subscription.
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onDidChangeFiles (callback) {
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return this.emitter.on('did-change-files', callback)
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}
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/*
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Section: Accessing the git repository
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*/
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// Public: Get an {Array} of {GitRepository}s associated with the project's
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// directories.
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//
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// This method will be removed in 2.0 because it does synchronous I/O.
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// Prefer the following, which evaluates to a {Promise} that resolves to an
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// {Array} of {Repository} objects:
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// ```
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// Promise.all(atom.project.getDirectories().map(
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// atom.project.repositoryForDirectory.bind(atom.project)))
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// ```
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getRepositories () {
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return this.repositories
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}
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// Public: Get the repository for a given directory asynchronously.
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//
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// * `directory` {Directory} for which to get a {Repository}.
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//
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// Returns a {Promise} that resolves with either:
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// * {Repository} if a repository can be created for the given directory
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// * `null` if no repository can be created for the given directory.
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repositoryForDirectory (directory) {
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const pathForDirectory = directory.getRealPathSync()
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let promise = this.repositoryPromisesByPath.get(pathForDirectory)
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if (!promise) {
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const promises = this.repositoryProviders.map((provider) =>
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provider.repositoryForDirectory(directory)
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)
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promise = Promise.all(promises).then((repositories) => {
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const repo = repositories.find((repo) => repo != null) || null
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// If no repository is found, remove the entry for the directory in
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// @repositoryPromisesByPath in case some other RepositoryProvider is
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// registered in the future that could supply a Repository for the
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// directory.
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if (repo == null) this.repositoryPromisesByPath.delete(pathForDirectory)
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if (repo && repo.onDidDestroy) {
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repo.onDidDestroy(() => this.repositoryPromisesByPath.delete(pathForDirectory))
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}
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return repo
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})
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this.repositoryPromisesByPath.set(pathForDirectory, promise)
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}
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return promise
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}
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/*
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Section: Managing Paths
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*/
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// Public: Get an {Array} of {String}s containing the paths of the project's
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// directories.
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getPaths () {
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return this.rootDirectories.map((rootDirectory) => rootDirectory.getPath())
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}
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// Public: Set the paths of the project's directories.
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//
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// * `projectPaths` {Array} of {String} paths.
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// * `options` An optional {Object} that may contain the following keys:
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// * `mustExist` If `true`, throw an Error if any `projectPaths` do not exist. Any remaining `projectPaths` that
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// do exist will still be added to the project. Default: `false`.
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// * `exact` If `true`, only add a `projectPath` if it names an existing directory. If `false` and any `projectPath`
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// is a file or does not exist, its parent directory will be added instead. Default: `false`.
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setPaths (projectPaths, options = {}) {
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for (let repository of this.repositories) {
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if (repository != null) repository.destroy()
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}
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this.rootDirectories = []
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this.repositories = []
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for (let path in this.watcherPromisesByPath) {
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this.watcherPromisesByPath[path].then(watcher => { watcher.dispose() })
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}
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this.watcherPromisesByPath = {}
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const missingProjectPaths = []
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for (let projectPath of projectPaths) {
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try {
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this.addPath(projectPath, {emitEvent: false, mustExist: true, exact: options.exact === true})
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} catch (e) {
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if (e.missingProjectPaths != null) {
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missingProjectPaths.push(...e.missingProjectPaths)
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} else {
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throw e
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}
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}
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}
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this.emitter.emit('did-change-paths', projectPaths)
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if ((options.mustExist === true) && (missingProjectPaths.length > 0)) {
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const err = new Error('One or more project directories do not exist')
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err.missingProjectPaths = missingProjectPaths
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throw err
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}
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}
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// Public: Add a path to the project's list of root paths
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//
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// * `projectPath` {String} The path to the directory to add.
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// * `options` An optional {Object} that may contain the following keys:
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// * `mustExist` If `true`, throw an Error if the `projectPath` does not exist. If `false`, a `projectPath` that does
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// not exist is ignored. Default: `false`.
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// * `exact` If `true`, only add `projectPath` if it names an existing directory. If `false`, if `projectPath` is a
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// a file or does not exist, its parent directory will be added instead.
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addPath (projectPath, options = {}) {
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const directory = this.getDirectoryForProjectPath(projectPath)
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let ok = true
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if (options.exact === true) {
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ok = (directory.getPath() === projectPath)
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}
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ok = ok && directory.existsSync()
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if (!ok) {
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if (options.mustExist === true) {
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const err = new Error(`Project directory ${directory} does not exist`)
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err.missingProjectPaths = [projectPath]
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throw err
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} else {
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return
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}
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}
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for (let existingDirectory of this.getDirectories()) {
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if (existingDirectory.getPath() === directory.getPath()) { return }
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}
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this.rootDirectories.push(directory)
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const didChangeCallback = events => {
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// Stop event delivery immediately on removal of a rootDirectory, even if its watcher
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// promise has yet to resolve at the time of removal
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if (this.rootDirectories.includes(directory)) {
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this.emitter.emit('did-change-files', events)
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}
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}
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// We'll use the directory's custom onDidChangeFiles callback, if available.
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// CustomDirectory::onDidChangeFiles should match the signature of
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// Project::onDidChangeFiles below (although it may resolve asynchronously)
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this.watcherPromisesByPath[directory.getPath()] =
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directory.onDidChangeFiles != null
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? Promise.resolve(directory.onDidChangeFiles(didChangeCallback))
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: watchPath(directory.getPath(), {}, didChangeCallback)
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for (let watchedPath in this.watcherPromisesByPath) {
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if (!this.rootDirectories.find(dir => dir.getPath() === watchedPath)) {
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this.watcherPromisesByPath[watchedPath].then(watcher => { watcher.dispose() })
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}
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}
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let repo = null
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for (let provider of this.repositoryProviders) {
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if (provider.repositoryForDirectorySync) {
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repo = provider.repositoryForDirectorySync(directory)
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}
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if (repo) { break }
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}
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this.repositories.push(repo != null ? repo : null)
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if (options.emitEvent !== false) {
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this.emitter.emit('did-change-paths', this.getPaths())
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}
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}
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getDirectoryForProjectPath (projectPath) {
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let directory = null
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for (let provider of this.directoryProviders) {
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if (typeof provider.directoryForURISync === 'function') {
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directory = provider.directoryForURISync(projectPath)
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if (directory) break
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}
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}
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if (directory == null) {
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directory = this.defaultDirectoryProvider.directoryForURISync(projectPath)
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}
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return directory
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}
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// Extended: Access a {Promise} that resolves when the filesystem watcher associated with a project
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// root directory is ready to begin receiving events.
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//
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// This is especially useful in test cases, where it's important to know that the watcher is
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// ready before manipulating the filesystem to produce events.
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//
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// * `projectPath` {String} One of the project's root directories.
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//
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// Returns a {Promise} that resolves with the {PathWatcher} associated with this project root
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// once it has initialized and is ready to start sending events. The Promise will reject with
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// an error instead if `projectPath` is not currently a root directory.
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getWatcherPromise (projectPath) {
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return this.watcherPromisesByPath[projectPath] ||
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Promise.reject(new Error(`${projectPath} is not a project root`))
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}
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// Public: remove a path from the project's list of root paths.
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//
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// * `projectPath` {String} The path to remove.
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removePath (projectPath) {
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// The projectPath may be a URI, in which case it should not be normalized.
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if (!this.getPaths().includes(projectPath)) {
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projectPath = this.defaultDirectoryProvider.normalizePath(projectPath)
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}
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let indexToRemove = null
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for (let i = 0; i < this.rootDirectories.length; i++) {
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const directory = this.rootDirectories[i]
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if (directory.getPath() === projectPath) {
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indexToRemove = i
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break
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}
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}
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if (indexToRemove != null) {
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this.rootDirectories.splice(indexToRemove, 1)
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const [removedRepository] = this.repositories.splice(indexToRemove, 1)
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if (!this.repositories.includes(removedRepository)) {
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if (removedRepository) removedRepository.destroy()
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}
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if (this.watcherPromisesByPath[projectPath] != null) {
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this.watcherPromisesByPath[projectPath].then(w => w.dispose())
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}
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delete this.watcherPromisesByPath[projectPath]
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this.emitter.emit('did-change-paths', this.getPaths())
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return true
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} else {
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return false
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}
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}
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// Public: Get an {Array} of {Directory}s associated with this project.
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getDirectories () {
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return this.rootDirectories
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}
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resolvePath (uri) {
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if (!uri) { return }
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if (uri.match(/[A-Za-z0-9+-.]+:\/\//)) { // leave path alone if it has a scheme
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return uri
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} else {
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let projectPath
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if (fs.isAbsolute(uri)) {
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return this.defaultDirectoryProvider.normalizePath(fs.resolveHome(uri))
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// TODO: what should we do here when there are multiple directories?
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} else if ((projectPath = this.getPaths()[0])) {
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return this.defaultDirectoryProvider.normalizePath(fs.resolveHome(path.join(projectPath, uri)))
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} else {
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return undefined
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}
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}
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}
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relativize (fullPath) {
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return this.relativizePath(fullPath)[1]
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}
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// Public: Get the path to the project directory that contains the given path,
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// and the relative path from that project directory to the given path.
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//
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// * `fullPath` {String} An absolute path.
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//
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// Returns an {Array} with two elements:
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// * `projectPath` The {String} path to the project directory that contains the
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// given path, or `null` if none is found.
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// * `relativePath` {String} The relative path from the project directory to
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// the given path.
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relativizePath (fullPath) {
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let result = [null, fullPath]
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if (fullPath != null) {
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for (let rootDirectory of this.rootDirectories) {
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const relativePath = rootDirectory.relativize(fullPath)
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if ((relativePath != null) && (relativePath.length < result[1].length)) {
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result = [rootDirectory.getPath(), relativePath]
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}
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}
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}
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return result
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}
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// Public: Determines whether the given path (real or symbolic) is inside the
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// project's directory.
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//
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// This method does not actually check if the path exists, it just checks their
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// locations relative to each other.
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//
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// ## Examples
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//
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// Basic operation
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//
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// ```coffee
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// # Project's root directory is /foo/bar
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// project.contains('/foo/bar/baz') # => true
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// project.contains('/usr/lib/baz') # => false
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// ```
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//
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// Existence of the path is not required
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//
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// ```coffee
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// # Project's root directory is /foo/bar
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// fs.existsSync('/foo/bar/baz') # => false
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// project.contains('/foo/bar/baz') # => true
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// ```
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//
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// * `pathToCheck` {String} path
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//
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// Returns whether the path is inside the project's root directory.
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contains (pathToCheck) {
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return this.rootDirectories.some(dir => dir.contains(pathToCheck))
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}
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/*
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Section: Private
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*/
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consumeServices ({serviceHub}) {
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serviceHub.consume(
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'atom.directory-provider',
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'^0.1.0',
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provider => {
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this.directoryProviders.unshift(provider)
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return new Disposable(() => {
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return this.directoryProviders.splice(this.directoryProviders.indexOf(provider), 1)
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})
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})
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return serviceHub.consume(
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'atom.repository-provider',
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'^0.1.0',
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provider => {
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this.repositoryProviders.unshift(provider)
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if (this.repositories.includes(null)) { this.setPaths(this.getPaths()) }
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return new Disposable(() => {
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return this.repositoryProviders.splice(this.repositoryProviders.indexOf(provider), 1)
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})
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})
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}
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// Retrieves all the {TextBuffer}s in the project; that is, the
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// buffers for all open files.
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//
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// Returns an {Array} of {TextBuffer}s.
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getBuffers () {
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return this.buffers.slice()
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}
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// Is the buffer for the given path modified?
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isPathModified (filePath) {
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const bufferForPath = this.findBufferForPath(this.resolvePath(filePath))
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return bufferForPath && bufferForPath.isModified()
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}
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findBufferForPath (filePath) {
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return _.find(this.buffers, buffer => buffer.getPath() === filePath)
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}
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findBufferForId (id) {
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return _.find(this.buffers, buffer => buffer.getId() === id)
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}
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// Only to be used in specs
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bufferForPathSync (filePath) {
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const absoluteFilePath = this.resolvePath(filePath)
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if (this.retiredBufferPaths.has(absoluteFilePath)) { return null }
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let existingBuffer
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if (filePath) { existingBuffer = this.findBufferForPath(absoluteFilePath) }
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return existingBuffer != null ? existingBuffer : this.buildBufferSync(absoluteFilePath)
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}
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// Only to be used when deserializing
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bufferForIdSync (id) {
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if (this.retiredBufferIDs.has(id)) { return null }
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let existingBuffer
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if (id) { existingBuffer = this.findBufferForId(id) }
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return existingBuffer != null ? existingBuffer : this.buildBufferSync()
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}
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// Given a file path, this retrieves or creates a new {TextBuffer}.
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//
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// If the `filePath` already has a `buffer`, that value is used instead. Otherwise,
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// `text` is used as the contents of the new buffer.
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//
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// * `filePath` A {String} representing a path. If `null`, an "Untitled" buffer is created.
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//
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// Returns a {Promise} that resolves to the {TextBuffer}.
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bufferForPath (absoluteFilePath) {
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let existingBuffer
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if (absoluteFilePath != null) { existingBuffer = this.findBufferForPath(absoluteFilePath) }
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if (existingBuffer) {
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return Promise.resolve(existingBuffer)
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} else {
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return this.buildBuffer(absoluteFilePath)
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}
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}
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shouldDestroyBufferOnFileDelete () {
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return atom.config.get('core.closeDeletedFileTabs')
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}
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// Still needed when deserializing a tokenized buffer
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buildBufferSync (absoluteFilePath) {
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const params = {shouldDestroyOnFileDelete: this.shouldDestroyBufferOnFileDelete}
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let buffer
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if (absoluteFilePath != null) {
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buffer = TextBuffer.loadSync(absoluteFilePath, params)
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} else {
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buffer = new TextBuffer(params)
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}
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this.addBuffer(buffer)
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return buffer
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}
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// Given a file path, this sets its {TextBuffer}.
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//
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// * `absoluteFilePath` A {String} representing a path.
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// * `text` The {String} text to use as a buffer.
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//
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// Returns a {Promise} that resolves to the {TextBuffer}.
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buildBuffer (absoluteFilePath) {
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const params = {shouldDestroyOnFileDelete: this.shouldDestroyBufferOnFileDelete}
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let promise
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if (absoluteFilePath != null) {
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if (this.loadPromisesByPath[absoluteFilePath] == null) {
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this.loadPromisesByPath[absoluteFilePath] =
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TextBuffer.load(absoluteFilePath, params).catch(error => {
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delete this.loadPromisesByPath[absoluteFilePath]
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throw error
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})
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}
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promise = this.loadPromisesByPath[absoluteFilePath]
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} else {
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promise = Promise.resolve(new TextBuffer(params))
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}
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return promise.then(buffer => {
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delete this.loadPromisesByPath[absoluteFilePath]
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this.addBuffer(buffer)
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return buffer
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})
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}
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addBuffer (buffer, options = {}) {
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return this.addBufferAtIndex(buffer, this.buffers.length, options)
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}
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addBufferAtIndex (buffer, index, options = {}) {
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this.buffers.splice(index, 0, buffer)
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this.subscribeToBuffer(buffer)
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this.emitter.emit('did-add-buffer', buffer)
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return buffer
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}
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// Removes a {TextBuffer} association from the project.
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//
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// Returns the removed {TextBuffer}.
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removeBuffer (buffer) {
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const index = this.buffers.indexOf(buffer)
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if (index !== -1) { return this.removeBufferAtIndex(index) }
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}
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removeBufferAtIndex (index, options = {}) {
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const [buffer] = this.buffers.splice(index, 1)
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return (buffer != null ? buffer.destroy() : undefined)
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}
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eachBuffer (...args) {
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let subscriber
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if (args.length > 1) { subscriber = args.shift() }
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const callback = args.shift()
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for (let buffer of this.getBuffers()) { callback(buffer) }
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if (subscriber) {
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return subscriber.subscribe(this, 'buffer-created', buffer => callback(buffer))
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} else {
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return this.on('buffer-created', buffer => callback(buffer))
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}
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}
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subscribeToBuffer (buffer) {
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buffer.onWillSave(({path}) => this.applicationDelegate.emitWillSavePath(path))
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buffer.onDidSave(({path}) => this.applicationDelegate.emitDidSavePath(path))
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buffer.onDidDestroy(() => this.removeBuffer(buffer))
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buffer.onDidChangePath(() => {
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if (!(this.getPaths().length > 0)) {
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this.setPaths([path.dirname(buffer.getPath())])
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}
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})
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buffer.onWillThrowWatchError(({error, handle}) => {
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handle()
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const message =
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`Unable to read file after file \`${error.eventType}\` event.` +
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`Make sure you have permission to access \`${buffer.getPath()}\`.`
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this.notificationManager.addWarning(message, {
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detail: error.message,
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dismissable: true
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})
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})
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}
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}
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