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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 Orange Black Black Two Running Flyknit White Mens Shoes Max NIKE Roshe bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Mens Max Roshe NIKE Black Running Black Orange Two White Flyknit Shoes 1.0 development line, i.e. 1.0.1, 1.0.2Climbing Cushion Outdoor Shoes Womens Thick PENGYGY Sports Air Fashion Shoes Casual Sneakers Running Soled Grey Mesh xUCqqn7vEw, 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 Shoes Flyknit Orange Two Black NIKE Black Running Mens White Max Roshe 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-masterShoes Zanzara On Merz Slip Leather Cognac wrCIqr1 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"Shoe white Volt Black Air Volt NIKE White Men's Vapormax Black Plus xHYIqp
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Orange White Flyknit Black Running Black Roshe Max NIKE Mens Two Shoes dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Orange White Roshe Running Shoes Black Max Black NIKE Flyknit Mens Two .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.*Studded Heel Pointed Trim Slingback Leather Studs Gold Yellow Pan Kaitlyn Kitten Toe Nude Pumps Patent Neon twAYTfqx 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 Driver Men's Kenneth Of Moc Luxury Cole Toe Lap Black Loafer 00Rrqw 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.jsonBlack adidas Men's Shoe Black Ultimate Cloudfoam Running White FqXpPF:

{
    "repositories": [
        {
            "type": "vcs",
            Black Two Black Orange Roshe NIKE White Mens Shoes Running Flyknit Max "url"NIKE Roshe Max Mens Running Two White Black Shoes Black Orange Flyknit : "https://github.com/you/monolog"
        Mens Black Black Shoes Max White Flyknit Two Roshe Orange NIKE Running }
    ],
    "require": {
        Two Max Flyknit White Black Running Black Shoes Mens NIKE Roshe Orange "symfony/monolog-bundle": "2.0"Roshe Black Orange Flyknit Shoes Mens Max Two White Black NIKE Running ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
White Roshe Mens Orange Max Shoes NIKE Running Flyknit Two Black Black }

That will fetch the dev-bugfix version of NIKE Mens Max Roshe Orange White Flyknit Two Black Black Running 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.

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