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denoland-deno/std/examples/catj.ts
2020-05-27 15:24:57 -04:00

110 lines
12 KiB
TypeScript

#!/usr/bin/env -S deno run --allow-read
// Ported from: https://github.com/soheilpro/catj
// Copyright (c) 2014 Soheil Rashidi
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
// Install using `deno install`
// $ deno install --allow-read https://deno.land/std/examples/catj.ts
/* eslint-disable @typescript-eslint/no-use-before-define */
import { parse } from "../flags/mod.ts";
import * as colors from "../fmt/colors.ts";
const decoder = new TextDecoder();
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function isObject(arg: any): arg is object {
return !!arg && arg.constructor === Object;
}
function isValidIdentifier(value: string): boolean {
// eslint-disable-next-line max-len
return 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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);
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function printObject(obj: { [key: string]: any }, 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 as object, nodePath);
} else {
printValue(value, nodePath);
}
}
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
function print(data: any): 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 Deno.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);
}
}
}