mirror of
https://github.com/denoland/deno.git
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610 lines
18 KiB
TypeScript
Executable file
610 lines
18 KiB
TypeScript
Executable file
#!/usr/bin/env -S deno --allow-run --allow-write
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/**
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* Copyright © James Long and contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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// This script formats the given source files. If the files are omitted, it
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// formats the all files in the repository.
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import { parse } from "../flags/mod.ts";
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import * as path from "../path/mod.ts";
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import * as toml from "../encoding/toml.ts";
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import * as yaml from "../encoding/yaml.ts";
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import * as ignore from "./ignore.ts";
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import { ExpandGlobOptions, WalkInfo, expandGlob } from "../fs/mod.ts";
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import { prettier, prettierPlugins } from "./prettier.ts";
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const { args, cwd, exit, readAll, readFile, stdin, stdout, writeFile } = Deno;
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const HELP_MESSAGE = `
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Formats the given files. If no arg is passed, then formats the all files.
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Usage: deno prettier/main.ts [options] [files...]
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Options:
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-H, --help Show this help message and exit.
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--check Check if the source files are formatted.
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--write Whether to write to the file, otherwise
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it will output to stdout, Defaults to
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false.
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--ignore <path> Ignore the given path(s).
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--ignore-path <auto|disable|path> Path to a file containing patterns that
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describe files to ignore. Optional
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value: auto/disable/filepath. Defaults
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to null.
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--stdin Specifies to read the code from stdin.
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If run the command in a pipe, you do not
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need to specify this flag.
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Defaults to false.
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--stdin-parser <typescript|babel|markdown|json>
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If set --stdin flag, then need specify a
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parser for stdin. available parser:
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typescript/babel/markdown/json. Defaults
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to typescript.
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--config <auto|disable|path> Specify the configuration file of the
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prettier.
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Optional value: auto/disable/filepath.
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Defaults to null.
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JS/TS Styling Options:
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--print-width <int> The line length where Prettier will try
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wrap. Defaults to 80.
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--tab-width <int> Number of spaces per indentation level.
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Defaults to 2.
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--use-tabs Indent with tabs instead of spaces.
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Defaults to false.
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--no-semi Do not print semicolons, except at the
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beginning of lines which may need them.
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--single-quote Use single quotes instead of double
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quotes. Defaults to false.
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--quote-props <as-needed|consistent|preserve>
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Change when properties in objects are
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quoted. Defaults to as-needed.
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--jsx-single-quote Use single quotes instead of double
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quotes in JSX.
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--jsx-bracket-same-line Put the > of a multi-line JSX element at
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the end of the last line instead of
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being alone on the next line (does not
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apply to self closing elements).
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--trailing-comma <none|es5|all> Print trailing commas wherever possible
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when multi-line. Defaults to none.
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--no-bracket-spacing Do not print spaces between brackets.
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--arrow-parens <avoid|always> Include parentheses around a sole arrow
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function parameter. Defaults to avoid.
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--end-of-line <auto|lf|crlf|cr> Which end of line characters to apply.
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Defaults to auto.
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Markdown Styling Options:
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--prose-wrap <always|never|preserve> How to wrap prose. Defaults to preserve.
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Example:
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deno run prettier/main.ts --write script1.ts script2.js
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Formats the files
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deno run prettier/main.ts --check script1.ts script2.js
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Checks if the files are formatted
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deno run prettier/main.ts --write
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Formats the all files in the repository
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deno run prettier/main.ts script1.ts
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Print the formatted code to stdout
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cat script1.ts | deno run prettier/main.ts
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Read the typescript code from stdin and
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output formatted code to stdout.
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cat config.json | deno run prettier/main.ts --stdin-parser=json
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Read the JSON string from stdin and
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output formatted code to stdout.
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`;
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// Available parsers
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type ParserLabel = "typescript" | "babel" | "markdown" | "json";
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interface PrettierBuildInOptions {
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printWidth: number;
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tabWidth: number;
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useTabs: boolean;
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semi: boolean;
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singleQuote: boolean;
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quoteProps: string;
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jsxSingleQuote: boolean;
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jsxBracketSameLine: boolean;
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trailingComma: string;
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bracketSpacing: boolean;
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arrowParens: string;
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proseWrap: string;
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endOfLine: string;
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}
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interface PrettierOptions extends PrettierBuildInOptions {
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write: boolean;
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}
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const encoder = new TextEncoder();
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const decoder = new TextDecoder();
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async function readFileIfExists(filename: string): Promise<string | null> {
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let data;
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try {
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data = await readFile(filename);
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} catch (e) {
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// The file is deleted. Returns null.
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return null;
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}
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return decoder.decode(data);
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}
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/**
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* Checks if the file has been formatted with prettier.
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*/
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async function checkFile(
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filename: string,
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parser: ParserLabel,
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prettierOpts: PrettierOptions
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): Promise<boolean> {
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const text = await readFileIfExists(filename);
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if (!text) {
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// The file is empty. Skip.
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return true;
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}
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const formatted = prettier.check(text, {
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...prettierOpts,
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parser,
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plugins: prettierPlugins
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});
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if (!formatted) {
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// TODO: print some diff info here to show why this failed
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console.error(`${filename} ... Not formatted`);
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}
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return formatted;
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}
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/**
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* Formats the given file.
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*/
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async function formatFile(
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filename: string,
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parser: ParserLabel,
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prettierOpts: PrettierOptions
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): Promise<void> {
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const text = await readFileIfExists(filename);
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if (!text) {
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// The file is deleted. Skip.
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return;
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}
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const formatted: string = prettier.format(text, {
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...prettierOpts,
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parser,
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plugins: prettierPlugins
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});
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const fileUnit8 = encoder.encode(formatted);
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if (prettierOpts.write) {
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if (text !== formatted) {
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console.log(`Formatting ${filename}`);
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await writeFile(filename, fileUnit8);
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}
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} else {
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await stdout.write(fileUnit8);
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}
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}
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/**
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* Selects the right prettier parser for the given path.
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*/
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function selectParser(path: string): ParserLabel | null {
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if (/\.tsx?$/.test(path)) {
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return "typescript";
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} else if (/\.jsx?$/.test(path)) {
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return "babel";
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} else if (/\.json$/.test(path)) {
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return "json";
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} else if (/\.md$/.test(path)) {
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return "markdown";
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}
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return null;
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}
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/**
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* Checks if the files of the given paths have been formatted with prettier.
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* If paths are empty, then checks all the files.
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*/
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async function checkSourceFiles(
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files: AsyncIterableIterator<WalkInfo>,
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prettierOpts: PrettierOptions
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): Promise<void> {
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const checks: Array<Promise<boolean>> = [];
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for await (const { filename } of files) {
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const parser = selectParser(filename);
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if (parser) {
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checks.push(checkFile(filename, parser, prettierOpts));
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}
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}
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const results = await Promise.all(checks);
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if (results.every((result): boolean => result)) {
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console.log("Every file is formatted");
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exit(0);
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} else {
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console.log("Some files are not formatted");
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exit(1);
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}
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}
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/**
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* Formats the files of the given paths with prettier.
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* If paths are empty, then formats all the files.
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*/
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async function formatSourceFiles(
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files: AsyncIterableIterator<WalkInfo>,
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prettierOpts: PrettierOptions
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): Promise<void> {
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const formats: Array<Promise<void>> = [];
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for await (const { filename } of files) {
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const parser = selectParser(filename);
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if (parser) {
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formats.push(formatFile(filename, parser, prettierOpts));
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}
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}
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await Promise.all(formats);
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exit(0);
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}
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/**
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* Format source code
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*/
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function format(
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text: string,
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parser: ParserLabel,
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prettierOpts: PrettierOptions
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): string {
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const formatted: string = prettier.format(text, {
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...prettierOpts,
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parser: parser,
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plugins: prettierPlugins
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});
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return formatted;
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}
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/**
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* Format code from stdin and output to stdout
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*/
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async function formatFromStdin(
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parser: ParserLabel,
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prettierOpts: PrettierOptions
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): Promise<void> {
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const byte = await readAll(stdin);
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const formattedCode = format(
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new TextDecoder().decode(byte),
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parser,
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prettierOpts
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);
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await stdout.write(new TextEncoder().encode(formattedCode));
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}
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/**
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* Get the files to format.
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* @param include The glob patterns to select the files.
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* eg `"cmd/*.ts"` to select all the typescript files in cmd
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* directory.
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* eg `"cmd/run.ts"` to select `cmd/run.ts` file as only.
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* @param exclude The glob patterns to ignore files.
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* eg `"*_test.ts"` to ignore all the test file.
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* @param root The directory from which to apply default globs.
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* @returns returns an async iterable object
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*/
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async function* getTargetFiles(
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include: string[],
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exclude: string[],
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root: string = cwd()
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): AsyncIterableIterator<WalkInfo> {
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const expandGlobOpts: ExpandGlobOptions = {
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root,
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exclude,
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includeDirs: true,
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extended: true,
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globstar: true
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};
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async function* expandDirectory(d: string): AsyncIterableIterator<WalkInfo> {
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for await (const walkInfo of expandGlob("**/*", {
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...expandGlobOpts,
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root: d,
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includeDirs: false
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})) {
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yield walkInfo;
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}
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}
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for (const globString of include) {
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for await (const walkInfo of expandGlob(globString, expandGlobOpts)) {
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if (walkInfo.info.isDirectory()) {
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yield* expandDirectory(walkInfo.filename);
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} else {
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yield walkInfo;
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}
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}
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}
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}
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/**
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* auto detect prettier configuration file and return config if file exist.
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*/
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async function autoResolveConfig(): Promise<PrettierBuildInOptions> {
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const configFileNamesMap = {
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".prettierrc.json": 1,
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".prettierrc.yaml": 1,
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".prettierrc.yml": 1,
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".prettierrc.js": 1,
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".prettierrc.ts": 1,
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"prettier.config.js": 1,
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"prettier.config.ts": 1,
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".prettierrc.toml": 1
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};
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const files = await Deno.readDir(".");
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for (const f of files) {
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if (f.isFile() && configFileNamesMap[f.name]) {
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const c = await resolveConfig(f.name);
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if (c) {
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return c;
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}
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}
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}
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return;
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}
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/**
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* parse prettier configuration file.
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* @param filepath the configuration file path.
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* support extension name with .json/.toml/.js
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*/
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async function resolveConfig(
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filepath: string
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): Promise<PrettierBuildInOptions> {
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let config: PrettierBuildInOptions = undefined;
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function generateError(msg: string): Error {
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return new Error(`Invalid prettier configuration file: ${msg}.`);
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}
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const raw = new TextDecoder().decode(await Deno.readFile(filepath));
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switch (path.extname(filepath)) {
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case ".json":
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try {
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config = JSON.parse(raw) as PrettierBuildInOptions;
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} catch (err) {
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throw generateError(err.message);
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}
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break;
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case ".yml":
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case ".yaml":
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try {
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config = yaml.parse(raw) as PrettierBuildInOptions;
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} catch (err) {
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throw generateError(err.message);
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}
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break;
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case ".toml":
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try {
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config = toml.parse(raw) as PrettierBuildInOptions;
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} catch (err) {
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throw generateError(err.message);
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}
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break;
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case ".js":
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case ".ts":
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const absPath = path.isAbsolute(filepath)
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? filepath
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: path.join(cwd(), filepath);
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try {
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const output = await import(
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// TODO: Remove platform condition
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// after https://github.com/denoland/deno/issues/3355 fixed
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Deno.build.os === "win" ? "file://" + absPath : absPath
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);
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if (output && output.default) {
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config = output.default as PrettierBuildInOptions;
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} else {
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throw new Error(
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"Prettier of JS version should have default exports."
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);
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}
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} catch (err) {
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throw generateError(err.message);
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}
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break;
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default:
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break;
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}
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return config;
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}
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/**
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* auto detect .prettierignore and return pattern if file exist.
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*/
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async function autoResolveIgnoreFile(): Promise<Set<string>> {
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const files = await Deno.readDir(".");
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for (const f of files) {
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if (f.isFile() && f.name === ".prettierignore") {
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return await resolveIgnoreFile(f.name);
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}
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}
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return new Set([]);
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}
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/**
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* parse prettier ignore file.
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* @param filepath the ignore file path.
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*/
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async function resolveIgnoreFile(filepath: string): Promise<Set<string>> {
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const raw = new TextDecoder().decode(await Deno.readFile(filepath));
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return ignore.parse(raw);
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}
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async function main(opts): Promise<void> {
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const { help, check, _: args } = opts;
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let prettierOpts: PrettierOptions = {
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printWidth: Number(opts["print-width"]),
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tabWidth: Number(opts["tab-width"]),
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useTabs: Boolean(opts["use-tabs"]),
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semi: Boolean(opts["semi"]),
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singleQuote: Boolean(opts["single-quote"]),
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quoteProps: opts["quote-props"],
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jsxSingleQuote: Boolean(opts["jsx-single-quote"]),
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jsxBracketSameLine: Boolean(opts["jsx-bracket-same-line "]),
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trailingComma: opts["trailing-comma"],
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bracketSpacing: Boolean(opts["bracket-spacing"]),
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arrowParens: opts["arrow-parens"],
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proseWrap: opts["prose-wrap"],
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endOfLine: opts["end-of-line"],
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write: opts["write"]
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};
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if (help) {
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console.log(HELP_MESSAGE);
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exit(0);
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}
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const configFilepath = opts["config"];
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if (configFilepath && configFilepath !== "disable") {
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const config =
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configFilepath === "auto"
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? await autoResolveConfig()
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: await resolveConfig(configFilepath);
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if (config) {
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prettierOpts = { ...prettierOpts, ...config };
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}
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}
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let ignore = opts.ignore as string[];
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if (!Array.isArray(ignore)) {
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ignore = [ignore];
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}
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const ignoreFilepath = opts["ignore-path"];
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if (ignoreFilepath && ignoreFilepath !== "disable") {
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const ignorePatterns =
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ignoreFilepath === "auto"
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? await autoResolveIgnoreFile()
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: await resolveIgnoreFile(ignoreFilepath);
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ignore = ignore.concat(Array.from(ignorePatterns));
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}
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const files = getTargetFiles(args.length ? args : ["."], ignore);
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const tty = Deno.isTTY();
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const shouldReadFromStdin =
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(!tty.stdin && (tty.stdout || tty.stderr)) || !!opts["stdin"];
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try {
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if (shouldReadFromStdin) {
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await formatFromStdin(opts["stdin-parser"], prettierOpts);
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} else if (check) {
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await checkSourceFiles(files, prettierOpts);
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} else {
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await formatSourceFiles(files, prettierOpts);
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}
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} catch (e) {
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|
console.error(e);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
main(
|
|
parse(args.slice(1), {
|
|
string: [
|
|
"ignore",
|
|
"ignore-path",
|
|
"printWidth",
|
|
"tab-width",
|
|
"trailing-comma",
|
|
"arrow-parens",
|
|
"prose-wrap",
|
|
"end-of-line",
|
|
"stdin-parser",
|
|
"quote-props"
|
|
],
|
|
boolean: [
|
|
"check",
|
|
"help",
|
|
"semi",
|
|
"use-tabs",
|
|
"single-quote",
|
|
"bracket-spacing",
|
|
"write",
|
|
"stdin",
|
|
"jsx-single-quote",
|
|
"jsx-bracket-same-line"
|
|
],
|
|
default: {
|
|
ignore: [],
|
|
"print-width": "80",
|
|
"tab-width": "2",
|
|
"use-tabs": false,
|
|
semi: true,
|
|
"single-quote": false,
|
|
"trailing-comma": "none",
|
|
"bracket-spacing": true,
|
|
"arrow-parens": "avoid",
|
|
"prose-wrap": "preserve",
|
|
"end-of-line": "auto",
|
|
write: false,
|
|
stdin: false,
|
|
"stdin-parser": "typescript",
|
|
"quote-props": "as-needed",
|
|
"jsx-single-quote": false,
|
|
"jsx-bracket-same-line": false
|
|
},
|
|
alias: {
|
|
H: "help"
|
|
}
|
|
})
|
|
);
|