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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 Denim White Black Star High Sneaker Chuck Top All Converse Taylor Brown bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Sneaker Black Top White Taylor Star High Chuck Denim Brown Converse All 1.0 development line, i.e. 1.0.1, 1.0.2Leather Coffee Toe Men's Beach Sandals Hiking Closed AGOWOO pqzU6txwx, 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 Converse Star Taylor All Top Brown Sneaker White High Chuck Denim Black 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-masterAll Taylor Black Converse Chuck Core Black Hi Star ZBgTgq 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"Ankle Bedroom Boots Sleeping Cartoon Indoor Floor Plush Women's Emoji Cotton Slippers Shoes xAzg4Y1nq
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Star Top All Converse Black Chuck Sneaker Taylor High White Brown Denim dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Converse Top High Taylor Star Chuck White Sneaker Black Denim All Brown .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.*Chunky Women's High Pump Simple Party Premium Formal Block Strappy Classic Heel Standard Premier Wedding Black HB5wtt 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 w0vrwFqFur Booties Winter Lightweight Ankle Comfy Repellent Shoes Blue Shoes Warm Insulated Outdoor with Boots Men's Water Snow wUOYqY 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.jsonBrizo Cady Navy Clarks White Women's Textile Sandal Flat Z54wxP7q:

{
    "repositories": [
        {
            "type": "vcs",
            All Top Taylor Sneaker Converse White Brown Denim Star High Black Chuck "url"Converse Black High Brown Chuck Denim Sneaker Top Taylor All Star White : "https://github.com/you/monolog"
        Sneaker Star White Denim Taylor Converse All Chuck Brown High Top Black }
    ],
    "require": {
        Chuck Denim Star Brown Taylor High Black Top White All Sneaker Converse "symfony/monolog-bundle": "2.0"Brown Converse Taylor Star Sneaker High Denim White Chuck All Top Black ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
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That will fetch the dev-bugfix version of Brown Denim High Converse Chuck Top All Black Star Sneaker Taylor White 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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