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/**
* @fileoverview Utility for executing npm commands.
* @author Ian VanSchooten
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const fs = require("fs"),
path = require("path"),
shell = require("shelljs"),
log = require("../logging");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
/**
* Find the closest package.json file, starting at process.cwd (by default),
* and working up to root.
*
* @param {string} [startDir=process.cwd()] Starting directory
* @returns {string} Absolute path to closest package.json file
*/
function findPackageJson(startDir) {
let dir = path.resolve(startDir || process.cwd());
do {
const pkgfile = path.join(dir, "package.json");
if (!shell.test("-f", pkgfile)) {
dir = path.join(dir, "..");
continue;
}
return pkgfile;
} while (dir !== path.resolve(dir, ".."));
return null;
}
//------------------------------------------------------------------------------
// Private
//------------------------------------------------------------------------------
/**
* Install node modules synchronously and save to devDependencies in package.json
* @param {string|string[]} packages Node module or modules to install
* @returns {void}
*/
function installSyncSaveDev(packages) {
if (Array.isArray(packages)) {
packages = packages.join(" ");
}
shell.exec(`npm i --save-dev ${packages}`, { stdio: "inherit" });
}
/**
* Check whether node modules are include in a project's package.json.
*
* @param {string[]} packages Array of node module names
* @param {Object} opt Options Object
* @param {boolean} opt.dependencies Set to true to check for direct dependencies
* @param {boolean} opt.devDependencies Set to true to check for development dependencies
* @param {boolean} opt.startdir Directory to begin searching from
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function check(packages, opt) {
let deps = [];
const pkgJson = (opt) ? findPackageJson(opt.startDir) : findPackageJson();
let fileJson;
if (!pkgJson) {
throw new Error("Could not find a package.json file. Run 'npm init' to create one.");
}
try {
fileJson = JSON.parse(fs.readFileSync(pkgJson, "utf8"));
} catch (e) {
log.info("Could not read package.json file. Please check that the file contains valid JSON.");
throw new Error(e);
}
if (opt.devDependencies && typeof fileJson.devDependencies === "object") {
deps = deps.concat(Object.keys(fileJson.devDependencies));
}
if (opt.dependencies && typeof fileJson.dependencies === "object") {
deps = deps.concat(Object.keys(fileJson.dependencies));
}
return packages.reduce((status, pkg) => {
status[pkg] = deps.indexOf(pkg) !== -1;
return status;
}, {});
}
/**
* Check whether node modules are included in the dependencies of a project's
* package.json.
*
* Convienience wrapper around check().
*
* @param {string[]} packages Array of node modules to check.
* @param {string} rootDir The directory contianing a package.json
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function checkDeps(packages, rootDir) {
return check(packages, { dependencies: true, startDir: rootDir });
}
/**
* Check whether node modules are included in the devDependencies of a project's
* package.json.
*
* Convienience wrapper around check().
*
* @param {string[]} packages Array of node modules to check.
* @returns {Object} An object whose keys are the module names
* and values are booleans indicating installation.
*/
function checkDevDeps(packages) {
return check(packages, { devDependencies: true });
}
/**
* Check whether package.json is found in current path.
*
* @param {string=} startDir Starting directory
* @returns {boolean} Whether a package.json is found in current path.
*/
function checkPackageJson(startDir) {
return !!findPackageJson(startDir);
}
//------------------------------------------------------------------------------
// Public Interface
//------------------------------------------------------------------------------
module.exports = {
installSyncSaveDev,
checkDeps,
checkDevDeps,
checkPackageJson
};
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