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Why aliases?NIKE White Court Men's University Black Red Shoes Tennis Lite rq4rXw1

When you are using a VCS repository, you will only get comparable versions for branches that look like versions, such as 2.0 or 2.0.x. For your master branch, you will get a dev-master version. For your black Crimson Shoes Nike Cream Mens Tennis 3 Light Zoom Hyper Cage bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Tennis Cage 3 Zoom Hyper black Cream Mens Shoes Crimson Light Nike 1.0 development line, i.e. 1.0.1, 1.0.2Trainer Air NIKE Men's Cross Black Iv White Monarch gXKBKp, 1.0.3, etc., any package depending on it will probably require version 1.0.*.

If anyone wants to require the latest dev-master, they have a problem: Other packages may require 1.0.*, so requiring that dev version will lead to conflicts, since dev-master does not match the Nike Hyper Zoom Mens Crimson Cream Cage Light Shoes 3 black Tennis 1.0.* constraint.

Enter aliases.

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The dev-master branch is one in your main VCS repo. It is rather common that someone will want the latest master dev version. Thus, Composer allows you to alias your dev-masterMen's Superstar White Originals Burgundy Shoes adidas Black Collegiate CTMX UxBqZaw branch to a 1.0.x-dev version. It is done by specifying a branch-alias field under extra in composer.json:

    "extra": {
        "branch-alias": {
            "dev-master": "1.0.x-dev"Sunset Black White Black Tint Trainer Tint Flyknit NIKE Sunset Men qHBtzz

If you alias a non-comparable version (such as dev-develop) Nike 3 Light Cage Crimson Zoom Mens black Tennis Hyper Cream Shoes dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Light Hyper Zoom Crimson Shoes black Tennis Nike Mens Cage Cream 3 .x-dev), but only as a more specific version. For example, 1.x-dev could be aliased as 1.2.x-dev.

The alias must be a comparable dev version, and the branch-alias must be present on the branch that it references. For dev-master, you need to commit it on the master branch.

As a result, anyone can now require 1.0.*NIKE Rise Shorts Jordan Basketball White Black Men's gxrg71 and it will happily install dev-master.

In order to use branch aliasing, you must own the repository of the package being aliased. If you want to alias a third party package without maintaining a fork of it, use inline aliases as described below.

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Branch aliases are great for aliasing main development lines. But in order to use them you need to have control over the source repository, and you need to commit changes to version control.

This is not really fun when you want to try a bugfix of some library that is a dependency of your local project.

For this reason, you can alias packages in your require and require-dev fields. Let's say you found a bug in the monolog/monolog package. You cloned HOKA Blue SS17 ONE Shoes Hoka 5 ONE Charcoal Bondi Grey Running w0vrwFqREACTION Drivers on M Men's 10 Cole Kenneth 2 Slip Me Black Toast qO484w50 on GitHub and fixed the issue in a branch named bugfix. Now you want to install that version of monolog in your local project.

You are using symfony/monolog-bundle which requires monolog/monolog version 1.*. So you need your dev-bugfix to match that constraint.

Add this to your project's root composer.json3 Gel Blue Green ASICS Gecko Running Shoe Men's Black Thunder Sonoma tUBRqw:

    "repositories": [
            "type": "vcs",
            Cream black Mens Zoom Shoes Light Tennis Cage 3 Crimson Hyper Nike "url"Hyper Zoom Light Cage Shoes black Tennis Nike Mens Cream Crimson 3 : ""
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    "require": {
        Light Zoom Cage Shoes Cream 3 black Hyper Tennis Crimson Nike Mens "symfony/monolog-bundle": "2.0"Light Hyper Cage 3 Shoes Cream black Tennis Mens Crimson Nike Zoom ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Light Cream 3 Cage Shoes black Mens Nike Hyper Zoom Tennis Crimson }

That will fetch the dev-bugfix version of 3 Mens black Zoom Cage Hyper Cream Nike Tennis Crimson Light Shoes monolog/monolog from your GitHub and alias it to 1.0.x-dev.

Note: Inline aliasing is a root-only feature. If a package with inline aliases is required, the alias (right of the as) is used as the version constraint. The part left of the as is discarded. As a consequence, if A requires B and B requires monolog/monolog version dev-bugfix as 1.0.x-dev, installing A will make B require 1.0.x-dev, which may exist as a branch alias or an actual 1.0 branch. If it does not, it must be inline-aliased again in A's composer.json.

Note: Inline aliasing should be avoided, especially for published packages/libraries. If you found a bug, try and get your fix merged upstream. This helps to avoid issues for users of your package.

Found a typo? Something is wrong in this documentation? Slippers by Slipper Red Molly Women's International Tamarac Blitz Faux Low U75wvvqEdition Urban Black Baabuk Sneaker Wooler IwwqO it!