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std/examples/catj.ts

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#!/usr/bin/env -S deno run --allow-read// Ported from: https://github.com/soheilpro/catj// Copyright (c) 2014 Soheil Rashidi// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
// Install using `deno install`// $ deno install --allow-read https://deno.land/std/examples/catj.ts
import { parse } from "../flags/mod.ts";import * as colors from "../fmt/colors.ts";import { readAll } from "../streams/conversion.ts";
const decoder = new TextDecoder();
// deno-lint-ignore no-explicit-anyfunction isObject(arg: any): arg is Record<string, unknown> { return !!arg && arg.constructor === Object;}
function isValidIdentifier(value: string): boolean { return 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.test( value, );}
function printValue(value: unknown, path: string): void { if (typeof value === "string") { value = colors.green('"' + value + '"'); } else if (typeof value === "number") { value = value.toString(); } else if (typeof value === "boolean") { value = colors.yellow(value.toString()); }
console.log(path + " = " + value);}
function printObject(obj: Record<string, unknown>, path: string): void { for (const key of Object.keys(obj)) { const value = obj[key]; let nodePath = path + colors.cyan(".") + key;
if (!isValidIdentifier(key)) { nodePath = (path ? path : colors.cyan(".")) + '["' + key + '"]'; }
if (Array.isArray(value)) { printArray(value, nodePath); } else if (isObject(value)) { printObject(value, nodePath); } else { printValue(value, nodePath); } }}
function printArray(array: unknown[], path: string): void { for (const index in array) { const value = array[index]; const nodePath = (path ? path : colors.cyan(".")) + "[" + colors.cyan(index) + "]";
if (Array.isArray(value)) { printArray(value, nodePath); } else if (isObject(value)) { printObject(value, nodePath); } else { printValue(value, nodePath); } }}
// deno-lint-ignore no-explicit-anyfunction print(data: any[] | Record<string, unknown>): void { if (Array.isArray(data)) { printArray(data, ""); } else { printObject(data, ""); }}
if (import.meta.main) { const parsedArgs = parse(Deno.args);
if (parsedArgs.h || parsedArgs.help || parsedArgs._.length === 0) { console.log("Usage: catj [-h|--help] [file...]"); console.log(); console.log("Examples:"); console.log(); console.log("// print file:\n catj file.json"); console.log(); console.log("// print multiple files:\n catj file1.json file2.json"); console.log(); console.log("// print from stdin:\n cat file.json | catj -"); }
if (parsedArgs._[0] === "-") { const contents = await readAll(Deno.stdin); const json = JSON.parse(decoder.decode(contents)); print(json); } else { for (const fileName of parsedArgs._) { const fileContents = await Deno.readFile(fileName.toString()); const json = JSON.parse(decoder.decode(fileContents)); print(json); } }}