How to use yarn

Documentation

Getting Started

Never used a package manager before or just new to Yarn? Let’s get you up and running in just a couple of minutes. Read more

The Yarn Workflow

How do I use Yarn? There are basic workflows for both creating and consuming Yarn packages that will help you get productive quickly. Read more

CLI Commands

Yarn is executed through a rich set of commands allowing package installation, administration, publishing, and more. Read more

Migrating from npm client

Yarn interops directly with many features of npm, including its package metadata format, allowing for a painless migration. Read more

Creating a Package

Creating and publishing a yarn package can be done with just a few commands and configuration settings, leaving you to focus on your actual code. Read more

Dependencies & Versions

Using Yarn you’ll be working with dependencies all the time. Let’s go through the different types and versions of dependencies. Read more

Configuration

Learn how to use package.json to configure your packages and dependencies. Read more

Offline Mirror

Maintain offline copies of your packages for more repeatable and reliable builds. Read more

Workspaces

Link together your projects for easier maintenance. Read more

Plug’n’Play

Install your projects in a safer and faster way. Read more

Yarn Organization

The Yarn organization is a collaboration of many companies and individuals dedicated to improving your package management experience. Read more

Основные команды bash, git, npm и yarn, а также немного о package.json и semver

Доброго времени суток, друзья!

Предлагаю вашему вниманию небольшую шпаргалку по основным командам bash, git, npm, yarn, package.json и semver.

Условные обозначения: [dir-name] — означает название директории, | — означает «или».

Рекомендую вводить каждую команду в терминале и внимательно изучать вывод, так вы быстро их запомните и определите, какие команды вам нужны, а какие нет.

Приношу извинения за возможные ошибки и опечатки. Буду рад любым замечаниям и предложениям.

Без дальнейших предисловий.

bash представляет собой инструмент командной строки, позволяющий выполнять некоторые распространенные действия.

Установка: в моем случае bash был установлен вместе с git.

Выход из терминала:

Путь к текущей директории:

Копирование, перемещение и удаление файла:

Вывод в терминал строки:

git представляет собой распределенную систему контроля версий, позволяющую контролировать процесс внесения изменений в проект.

Удаление файлов и директорий:

Просмотр состояния репозитория:

Добавление сообщения (коммита):

Просмотр разницы между коммитами:

Просмотр истории изменений:

Работа с ветками:

Разрешение конфликтов при слиянии:

Сохранение незакоммиченных изменений:

Автозавершение повторных конфликтов:

npm представляет собой пакетный менеджер, позволяющий устанавливать зависимости проекта.

npm устанавливается вместе с Node.js.

Также вместе с Node.js устанавливается npx, позволяющий запускать исполняемые файлы без установки: npx create-react-app my-app.

Список доступных команд:

Принудительная переустановка зависимостей:

Установка только продакшн-пакетов:

Добавление зависимости для разработки:

Глобальная установка/обновление/удаление пакета:

Определение устаревших пакетов:

Список установленных зависимостей:

Информация о пакете:

Запуск скрипта/выполнение команды:

Удаление дублирующихся пакетов:

Удаление посторонних пакетов:

Обнаружение уязвимостей (угроз безопасности):

Автоматическое исправление уязвимостей:

yarn, как и npm, представляет собой пакетный менеджер, позволяющий устанавливать зависимости проекта.

Команда «yarn dlx» позволяет запускать исполняемые файлы без установки: yarn dlx create-react-app my-app. Для этого yarn необходимо обновить до второй версии: yarn set version berry.

Список доступных команд:

Принудительная переустановка зависимостей:

Установка только продакшн-пакетов:

Добавление зависимости для разработки:

Глобальная установка/обновление/удаление пакета:

Список установленных зависимостей:

Информация о пакете:

Запуск скрипта/выполнение команды:

package.json

Файлы «package-lock.json» и «yarn.lock» содержат более полную информацию об установленных пакетах, чем package.json, например, конкретные версии пакетов вместо диапазона допустимых версий.

Версионирование

Каждый пакет имеет версию, состоящую из трех цифр (например, 1.0.0), где первая цифра — мажорная версия (major), вторая — минорная версия (minor), третья — патчевая версия (патч, patch). Выпуск новой версии называется релизом.

Увеличение каждой из этих цифр согласно правилам семантического версионирования (semver) означает следующее:

How To Install and Use the Yarn Package Manager for Node.js

Introduction

Yarn is a package manager for Node.js that focuses on speed, security, and consistency. It was originally created to address some issues with the popular NPM package manager. Though the two package managers have since converged in terms of performance and features, Yarn remains popular, especially in the world of React development.

Some of the unique features of Yarn are:

In this tutorial you will install Yarn globally, add Yarn to a specific project, and learn some basic Yarn commands.

Prerequisites

Before installing and using the Yarn package manager, you will need to have Node.js installed. To see if you already have Node.js installed, type the following command into your local command line terminal:

If you see a version number, such as v12.16.3 printed, you have Node.js installed. If you get a command not found error (or similar phrasing), please install Node.js before continuing.

To install Node.js, follow our tutorial for Ubuntu, Debian, CentOS, or macOS.

Once you have Node.js installed, proceed to Step 1 to install the Yarn package manager.

Step 1 — Installing Yarn Globally

After the package installs, have the yarn command print its own version number. This will let you verify it was installed properly:

Now that you have the yarn command installed globally, you can use it to install Yarn into a specific JavaScript project.

Step 2 — Installing Yarn in Your Project

If you are using Yarn to work with an existing Yarn-based project, you can skip this step. The project should already be set up with a local version of Yarn and all the configuration files necessary to use it.

If you are setting up a new project of your own, you’ll want to configure a project-specific version of Yarn now.

First, navigate to your project directory:

If you don’t have a project directory, you can make a new one with mkdir and then move into it:

Now use the yarn set command to set the version to berry :

You’ll see the version is 3.0.0 or higher. This is the latest release of Yarn.

Your project is now set up with a project-specific version of Yarn. Next we’ll look at a few commonly used yarn commands to get started with.

Using Yarn

Yarn has many subcommands, but you only need a few to get started. Let’s look at the first subcommands you’ll want to use.

Getting Help

This would print out details on how to use the yarn install command.

Starting a New Yarn Project

If you’re starting a project from scratch, use the init subcommand to create the Yarn-specific files you’ll need:

This will add a package.json configuration file and a yarn.lock file to your directory. The package.json contains configuration and your list of module dependencies. The yarn.lock file locks those dependencies to specific versions, making sure that the dependency tree is always consistent.

Installing all of a Project’s Dependencies

To download and install all the dependencies in an existing Yarn-based project, use the install subcommand:

This will download and install the modules you need to get started.

Adding a New Dependency to a Project

Use the add subcommand to add new dependencies to a project:

This will download the module, install it, and update your package.json and yarn.lock files.

Conclusion

In this tutorial you installed Yarn and learned about a few yarn subcommands. For more information on using Yarn, take a look at the official Yarn CLI documentation.

For more general Node.js and JavaScript help, please visit our Node.js and JavaScript tag pages, where you’ll find relevant tutorials, tech talks, and community Q&A.

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bodnaristvan/learn-yarn

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README.md

Yarn is Yet Another Rackage Nanager: https://yarnpkg.com/

Claimed advantages over npm are speed, predictability, and offline capabilities.

Install dependencies from package.json: npm install == yarn

Cool things yarn can do

Show why a dependency was installed

yarn why package

Update the version of the developed package

Shows the local package version from package.json, and asks for a new version number. Automatically updates package.json and commits the change.

Most used version ranges:

Note: public package versions has to start with 1.0.0!

Useful commands when working with versions

Set how version ranges are stored in package.json after yarn add

Install specific version:

Check outdated dependencies, show their source and the latest available version number:

Update-npm-packages as a service: https://greenkeeper.io/

These won’t be installed as dependencies, but rather mark the version of peers that will surely work with the local package. https://docs.npmjs.com/files/package.json#peerdependencies

Packages that are bundled when publishing the dependency. // TODO: what does that exactly mean?

Install only packages required for production builds

Setting the NODE_ENV env var can be used as well

Missing from yarn

git+ssh:// links in dependencies

Workaround: replace host:path with host/path

yarnpkg/yarn

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Launching GitHub Desktop

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Launching GitHub Desktop

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README.md

Fast, reliable, and secure dependency management.

Fast: Yarn caches every package it has downloaded, so it never needs to download the same package again. It also does almost everything concurrently to maximize resource utilization. This means even faster installs.

Reliable: Using a detailed but concise lockfile format and a deterministic algorithm for install operations, Yarn is able to guarantee that any installation that works on one system will work exactly the same on another system.

Secure: Yarn uses checksums to verify the integrity of every installed package before its code is executed.

Read the Installation Guide on our website for detailed instructions on how to install Yarn.

Read the Usage Guide on our website for detailed instructions on how to use Yarn.

Contributing to Yarn

The 1.x codebase is fairly old and will only accept security fixes. For new features or bugfixes, please see our new repository and its contribution guide.

Yarn wouldn’t exist if it wasn’t for excellent prior art. Yarn has been inspired by the following projects:

Thanks to Sam Holmes for donating the npm package name!