File: //lib/node_modules/@angular/cli/node_modules/@angular-devkit/schematics/src/tree/host-tree.js
"use strict";
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.FilterHostTree = exports.HostCreateTree = exports.HostTree = exports.HostDirEntry = void 0;
const core_1 = require("@angular-devkit/core");
const jsonc_parser_1 = require("jsonc-parser");
const rxjs_1 = require("rxjs");
const util_1 = require("util");
const exception_1 = require("../exception/exception");
const delegate_1 = require("./delegate");
const entry_1 = require("./entry");
const interface_1 = require("./interface");
const recorder_1 = require("./recorder");
const scoped_1 = require("./scoped");
let _uniqueId = 0;
class HostDirEntry {
parent;
path;
_host;
_tree;
constructor(parent, path, _host, _tree) {
this.parent = parent;
this.path = path;
this._host = _host;
this._tree = _tree;
}
get subdirs() {
return this._host
.list(this.path)
.filter((fragment) => this._host.isDirectory((0, core_1.join)(this.path, fragment)));
}
get subfiles() {
return this._host
.list(this.path)
.filter((fragment) => this._host.isFile((0, core_1.join)(this.path, fragment)));
}
dir(name) {
return this._tree.getDir((0, core_1.join)(this.path, name));
}
file(name) {
return this._tree.get((0, core_1.join)(this.path, name));
}
visit(visitor) {
try {
this.getSubfilesRecursively().forEach((file) => visitor(file.path, file));
}
catch (e) {
if (e !== interface_1.FileVisitorCancelToken) {
throw e;
}
}
}
getSubfilesRecursively() {
function _recurse(entry) {
return entry.subdirs.reduce((files, subdir) => [...files, ..._recurse(entry.dir(subdir))], entry.subfiles.map((subfile) => entry.file(subfile)));
}
return _recurse(this);
}
}
exports.HostDirEntry = HostDirEntry;
class HostTree {
_backend;
_id = --_uniqueId;
_record;
_recordSync;
_ancestry = new Set();
_dirCache = new Map();
[interface_1.TreeSymbol]() {
return this;
}
static isHostTree(tree) {
if (tree instanceof HostTree) {
return true;
}
if (typeof tree === 'object' && typeof tree._ancestry === 'object') {
return true;
}
return false;
}
constructor(_backend = new core_1.virtualFs.Empty()) {
this._backend = _backend;
this._record = new core_1.virtualFs.CordHost(new core_1.virtualFs.SafeReadonlyHost(_backend));
this._recordSync = new core_1.virtualFs.SyncDelegateHost(this._record);
}
_normalizePath(path) {
return (0, core_1.normalize)('/' + path);
}
_willCreate(path) {
return this._record.willCreate(path);
}
_willOverwrite(path) {
return this._record.willOverwrite(path);
}
_willDelete(path) {
return this._record.willDelete(path);
}
_willRename(path) {
return this._record.willRename(path);
}
branch() {
const branchedTree = new HostTree(this._backend);
branchedTree._record = this._record.clone();
branchedTree._recordSync = new core_1.virtualFs.SyncDelegateHost(branchedTree._record);
branchedTree._ancestry = new Set(this._ancestry).add(this._id);
return branchedTree;
}
isAncestorOf(tree) {
if (tree instanceof HostTree) {
return tree._ancestry.has(this._id);
}
if (tree instanceof delegate_1.DelegateTree) {
return this.isAncestorOf(tree._other);
}
if (tree instanceof scoped_1.ScopedTree) {
return this.isAncestorOf(tree._base);
}
return false;
}
merge(other, strategy = interface_1.MergeStrategy.Default) {
if (other === this) {
// Merging with yourself? Tsk tsk. Nothing to do at least.
return;
}
if (this.isAncestorOf(other)) {
// Workaround for merging a branch back into one of its ancestors
// More complete branch point tracking is required to avoid
strategy |= interface_1.MergeStrategy.Overwrite;
}
const creationConflictAllowed = (strategy & interface_1.MergeStrategy.AllowCreationConflict) == interface_1.MergeStrategy.AllowCreationConflict;
const overwriteConflictAllowed = (strategy & interface_1.MergeStrategy.AllowOverwriteConflict) == interface_1.MergeStrategy.AllowOverwriteConflict;
const deleteConflictAllowed = (strategy & interface_1.MergeStrategy.AllowDeleteConflict) == interface_1.MergeStrategy.AllowDeleteConflict;
other.actions.forEach((action) => {
switch (action.kind) {
case 'c': {
const { path, content } = action;
if (this._willCreate(path) || this._willOverwrite(path) || this.exists(path)) {
const existingContent = this.read(path);
if (existingContent && content.equals(existingContent)) {
// Identical outcome; no action required
return;
}
if (!creationConflictAllowed) {
throw new exception_1.MergeConflictException(path);
}
this._record.overwrite(path, content).subscribe();
}
else {
this._record.create(path, content).subscribe();
}
return;
}
case 'o': {
const { path, content } = action;
if (this._willDelete(path) && !overwriteConflictAllowed) {
throw new exception_1.MergeConflictException(path);
}
// Ignore if content is the same (considered the same change).
if (this._willOverwrite(path)) {
const existingContent = this.read(path);
if (existingContent && content.equals(existingContent)) {
// Identical outcome; no action required
return;
}
if (!overwriteConflictAllowed) {
throw new exception_1.MergeConflictException(path);
}
}
// We use write here as merge validation has already been done, and we want to let
// the CordHost do its job.
this._record.write(path, content).subscribe();
return;
}
case 'r': {
const { path, to } = action;
if (this._willDelete(path)) {
throw new exception_1.MergeConflictException(path);
}
if (this._willRename(path)) {
if (this._record.willRenameTo(path, to)) {
// Identical outcome; no action required
return;
}
// No override possible for renaming.
throw new exception_1.MergeConflictException(path);
}
this.rename(path, to);
return;
}
case 'd': {
const { path } = action;
if (this._willDelete(path)) {
// TODO: This should technically check the content (e.g., hash on delete)
// Identical outcome; no action required
return;
}
if (!this.exists(path) && !deleteConflictAllowed) {
throw new exception_1.MergeConflictException(path);
}
this._recordSync.delete(path);
return;
}
}
});
}
get root() {
return this.getDir('/');
}
// Readonly.
read(path) {
const entry = this.get(path);
return entry ? entry.content : null;
}
readText(path) {
const data = this.read(path);
if (data === null) {
throw new exception_1.FileDoesNotExistException(path);
}
const decoder = new util_1.TextDecoder('utf-8', { fatal: true });
try {
// With the `fatal` option enabled, invalid data will throw a TypeError
return decoder.decode(data);
}
catch (e) {
if (e instanceof TypeError) {
throw new Error(`Failed to decode "${path}" as UTF-8 text.`);
}
throw e;
}
}
readJson(path) {
const content = this.readText(path);
const errors = [];
const result = (0, jsonc_parser_1.parse)(content, errors, { allowTrailingComma: true });
// If there is a parse error throw with the error information
if (errors[0]) {
const { error, offset } = errors[0];
throw new Error(`Failed to parse "${path}" as JSON. ${(0, jsonc_parser_1.printParseErrorCode)(error)} at offset: ${offset}.`);
}
return result;
}
exists(path) {
return this._recordSync.isFile(this._normalizePath(path));
}
get(path) {
const p = this._normalizePath(path);
if (this._recordSync.isDirectory(p)) {
throw new core_1.PathIsDirectoryException(p);
}
if (!this._recordSync.exists(p)) {
return null;
}
return new entry_1.LazyFileEntry(p, () => Buffer.from(this._recordSync.read(p)));
}
getDir(path) {
const p = this._normalizePath(path);
if (this._recordSync.isFile(p)) {
throw new core_1.PathIsFileException(p);
}
let maybeCache = this._dirCache.get(p);
if (!maybeCache) {
let parent = (0, core_1.dirname)(p);
if (p === parent) {
parent = null;
}
maybeCache = new HostDirEntry(parent && this.getDir(parent), p, this._recordSync, this);
this._dirCache.set(p, maybeCache);
}
return maybeCache;
}
visit(visitor) {
this.root.visit((path, entry) => {
visitor(path, entry);
});
}
// Change content of host files.
overwrite(path, content) {
const p = this._normalizePath(path);
if (!this._recordSync.exists(p)) {
throw new exception_1.FileDoesNotExistException(p);
}
const c = typeof content == 'string' ? Buffer.from(content) : content;
this._record.overwrite(p, c).subscribe();
}
beginUpdate(path) {
const entry = this.get(path);
if (!entry) {
throw new exception_1.FileDoesNotExistException(path);
}
return recorder_1.UpdateRecorderBase.createFromFileEntry(entry);
}
commitUpdate(record) {
if (record instanceof recorder_1.UpdateRecorderBase) {
const path = record.path;
const entry = this.get(path);
if (!entry) {
throw new exception_1.ContentHasMutatedException(path);
}
else {
const newContent = record.apply(entry.content);
if (!newContent.equals(entry.content)) {
this.overwrite(path, newContent);
}
}
}
else {
throw new exception_1.InvalidUpdateRecordException();
}
}
// Structural methods.
create(path, content) {
const p = this._normalizePath(path);
if (this._recordSync.exists(p)) {
throw new exception_1.FileAlreadyExistException(p);
}
const c = typeof content == 'string' ? Buffer.from(content) : content;
this._record.create(p, c).subscribe();
}
delete(path) {
this._recordSync.delete(this._normalizePath(path));
}
rename(from, to) {
this._recordSync.rename(this._normalizePath(from), this._normalizePath(to));
}
apply(action, strategy) {
throw new exception_1.SchematicsException('Apply not implemented on host trees.');
}
*generateActions() {
for (const record of this._record.records()) {
switch (record.kind) {
case 'create':
yield {
id: this._id,
parent: 0,
kind: 'c',
path: record.path,
content: Buffer.from(record.content),
};
break;
case 'overwrite':
yield {
id: this._id,
parent: 0,
kind: 'o',
path: record.path,
content: Buffer.from(record.content),
};
break;
case 'rename':
yield {
id: this._id,
parent: 0,
kind: 'r',
path: record.from,
to: record.to,
};
break;
case 'delete':
yield {
id: this._id,
parent: 0,
kind: 'd',
path: record.path,
};
break;
}
}
}
get actions() {
// Create a list of all records until we hit our original backend. This is to support branches
// that diverge from each others.
return Array.from(this.generateActions());
}
}
exports.HostTree = HostTree;
class HostCreateTree extends HostTree {
constructor(host) {
super();
const tempHost = new HostTree(host);
tempHost.visit((path) => {
const content = tempHost.read(path);
if (content) {
this.create(path, content);
}
});
}
}
exports.HostCreateTree = HostCreateTree;
class FilterHostTree extends HostTree {
constructor(tree, filter = () => true) {
const newBackend = new core_1.virtualFs.SimpleMemoryHost();
// cast to allow access
const originalBackend = tree._backend;
const recurse = (base) => {
return originalBackend.list(base).pipe((0, rxjs_1.mergeMap)((x) => x), (0, rxjs_1.map)((path) => (0, core_1.join)(base, path)), (0, rxjs_1.concatMap)((path) => {
let isDirectory = false;
originalBackend.isDirectory(path).subscribe((val) => (isDirectory = val));
if (isDirectory) {
return recurse(path);
}
let isFile = false;
originalBackend.isFile(path).subscribe((val) => (isFile = val));
if (!isFile || !filter(path)) {
return rxjs_1.EMPTY;
}
let content = null;
originalBackend.read(path).subscribe((val) => (content = val));
if (!content) {
return rxjs_1.EMPTY;
}
return newBackend.write(path, content);
}));
};
recurse((0, core_1.normalize)('/')).subscribe();
super(newBackend);
for (const action of tree.actions) {
if (!filter(action.path)) {
continue;
}
switch (action.kind) {
case 'c':
this.create(action.path, action.content);
break;
case 'd':
this.delete(action.path);
break;
case 'o':
this.overwrite(action.path, action.content);
break;
case 'r':
this.rename(action.path, action.to);
break;
}
}
}
}
exports.FilterHostTree = FilterHostTree;