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#!/usr/bin/env deno --allow-run --allow-write
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
// This script formats the given source files. If the files are omitted, it
// formats the all files in the repository.
const { args, exit, readFile, writeFile } = Deno;
type FileInfo = Deno.FileInfo;
import { glob } from "../fs/glob.ts";
import { walk } from "../fs/walk.ts";
import { parse } from "../flags/mod.ts";
import { prettier, prettierPlugins } from "./prettier.ts";
const HELP_MESSAGE = `
Formats the given files. If no arg is passed, then formats the all files.
Usage: deno prettier/main.ts [options] [files...]
Options:
-H, --help Show this help message and exit.
--check Check if the source files are formatted.
--ignore <path> Ignore the given path(s).
Example:
deno prettier/main.ts script1.ts script2.js
Formats the files
deno prettier/main.ts --check script1.ts script2.js
Checks if the files are formatted
deno prettier/main.ts
Formats the all files in the repository
`;
// Available parsers
type ParserLabel = "typescript" | "babel" | "markdown" | "json";
const encoder = new TextEncoder();
const decoder = new TextDecoder();
async function readFileIfExists(filename: string): Promise<string | null> {
let data;
try {
data = await readFile(filename);
} catch (e) {
// The file is deleted. Returns null.
return null;
}
return decoder.decode(data);
}
/**
* Checks if the file has been formatted with prettier.
*/
async function checkFile(
filename: string,
parser: ParserLabel
): Promise<boolean> {
const text = await readFileIfExists(filename);
if (!text) {
// The file is deleted. Skip.
return;
}
const formatted = prettier.check(text, {
parser,
plugins: prettierPlugins
});
if (!formatted) {
// TODO: print some diff info here to show why this failed
console.error(`${filename} ... Not formatted`);
}
return formatted;
}
/**
* Formats the given file.
*/
async function formatFile(
filename: string,
parser: ParserLabel
): Promise<void> {
const text = await readFileIfExists(filename);
if (!text) {
// The file is deleted. Skip.
return;
}
const formatted = prettier.format(text, {
parser,
plugins: prettierPlugins
});
if (text !== formatted) {
console.log(`Formatting ${filename}`);
await writeFile(filename, encoder.encode(formatted));
}
}
/**
* Selects the right prettier parser for the given path.
*/
function selectParser(path: string): ParserLabel | null {
if (/\.ts$/.test(path)) {
return "typescript";
} else if (/\.js$/.test(path)) {
return "babel";
} else if (/\.json$/.test(path)) {
return "json";
} else if (/\.md$/.test(path)) {
return "markdown";
}
return null;
}
/**
* Checks if the files of the given paths have been formatted with prettier.
* If paths are empty, then checks all the files.
*/
async function checkSourceFiles(
files: AsyncIterableIterator<FileInfo>
): Promise<void> {
const checks: Array<Promise<boolean>> = [];
for await (const file of files) {
const parser = selectParser(file.path);
if (parser) {
checks.push(checkFile(file.path, parser));
}
}
const results = await Promise.all(checks);
if (results.every(result => result)) {
console.log("Every file is formatted");
exit(0);
} else {
console.log("Some files are not formatted");
exit(1);
}
}
/**
* Formats the files of the given paths with prettier.
* If paths are empty, then formats all the files.
*/
async function formatSourceFiles(
files: AsyncIterableIterator<FileInfo>
): Promise<void> {
const formats: Array<Promise<void>> = [];
for await (const file of files) {
const parser = selectParser(file.path);
if (parser) {
formats.push(formatFile(file.path, parser));
}
}
await Promise.all(formats);
exit(0);
}
async function main(opts): Promise<void> {
const { help, ignore, check, _: args } = opts;
if (help) {
console.log(HELP_MESSAGE);
exit(0);
}
const options = { flags: "g" };
const skip = Array.isArray(ignore)
? ignore.map((i: string) => glob(i, options))
: [glob(ignore, options)];
const match =
args.length > 0 ? args.map((a: string) => glob(a, options)) : undefined;
const files = walk(".", { match, skip });
try {
if (check) {
await checkSourceFiles(files);
} else {
await formatSourceFiles(files);
}
} catch (e) {
console.log(e);
exit(1);
}
}
main(
parse(args.slice(1), {
string: ["ignore"],
boolean: ["check", "help"],
default: {
ignore: []
},
alias: {
H: "help"
}
})
);
|
