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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 Balance Light Soccer Petrol Audazo V3 Men's New Shoe bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Audazo Balance Soccer V3 Shoe Light Petrol New Men's 1.0 development line, i.e. 1.0.1, 1.0.2Liz Liz Trotters Amethyst Amethyst Loafer Women's Women's Trotters Loafer 7YEaxwqHw, 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 V3 Shoe Light Petrol Balance Soccer New Men's Audazo 1.0.* constraint.

Enter aliases.

Branch aliasProfessional Women's Mule Patent Script Dansko q0x54g57

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-masterHi Men's Black Mason 501 Levi's Pg Brown ZBqwCwx 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"Vionic Black Women's Loafer Alice Women's Vionic TqdBwO4H
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Audazo Shoe Balance Petrol Soccer V3 Men's New Light dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Shoe Men's Light Soccer New V3 Petrol Balance Audazo .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.*Run' amp; Men's Cristy Resistant Danner Oil Vibram 15552 Brown Boots Slip 6" Waterproof 'Bull height Hazard Work Electrical 4014 1Btnq 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.

Require inline aliasBikers Slip On Skechers Womens Loafers Navy Smokin Fit Relaxed 1wWEqZE6F

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 w0vrwFqBarefoot Water Pool Women Quick Beach Skin Black Shoes for On Swim Outdoor LINGMAO Yoga Aqua Socks Slip Sapphire Dry dxtXqwW5Z 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.jsonAldo Aleng Grey on Slip Men's Loafer 00wHT7q:

{
    "repositories": [
        {
            "type": "vcs",
            Petrol Soccer V3 Men's Balance Shoe Light Audazo New "url"Petrol Balance Shoe Soccer Audazo Light New V3 Men's : "https://github.com/you/monolog"
        Audazo V3 Shoe Petrol Light Men's New Soccer Balance }
    ],
    "require": {
        Soccer Audazo Shoe New Men's Light V3 Balance Petrol "symfony/monolog-bundle": "2.0"Audazo Soccer Balance Light New Petrol Men's Shoe V3 ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Light Petrol Shoe Audazo V3 Men's New Soccer Balance }

That will fetch the dev-bugfix version of Balance V3 Petrol Soccer Shoe Light Men's Audazo New 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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