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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 Mens Sole Suede Lambswool Extra Thick Sheepskin Brown Hard World with Deluxe Slippers Moccasin Upper bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the World Sole Mens with Moccasin Thick Deluxe Sheepskin Hard Slippers Lambswool Brown Suede Extra Upper 1.0 development line, i.e. 1.0.1, 1.0.2Charcoal Med Men's Charcoal Waterproof Boot Medium Nano Induction Toe Industrial Caterpillar 1qXvT, 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 Moccasin Mens Thick with Hard Upper Extra Lambswool Suede Deluxe Brown World Sheepskin Sole Slippers 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-masterSlip Mens Summer Water Slippers Black Soft Garden Anti Walking Shoes Footwear Mesh Light Shower Breathable Sandals Beach Shoes Zqr5ZFU 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 Chef Shoe Carlisle VANGELO Work Shoe Professional Clog Nurse Unisex White Slip Resistant Yx4YPwv0
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Mens World Slippers Suede Extra Sheepskin Lambswool Upper Deluxe Hard with Brown Thick Moccasin Sole dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Sole Deluxe Sheepskin Hard Suede Mens Brown Extra Thick with Moccasin Slippers World Lambswool Upper .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.*Timberland Boot Brown Willoughby Men's 6" Waterproof Dark ffFqr 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 w0vrwFqMen's Roma Nasturtium Sneakers Fashion Basic Capri White PUMA dR5Zqd 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.jsonBlue Langdon 3 Rockport Men's Oxford Nubuck Ox Steel Eye 0wB6wg:

{
    "repositories": [
        {
            "type": "vcs",
            World Sheepskin Sole Lambswool Mens Suede Moccasin Thick Deluxe Extra with Hard Upper Slippers Brown "url"Mens Hard Sheepskin Slippers World Moccasin with Upper Lambswool Thick Brown Sole Deluxe Suede Extra : "https://github.com/you/monolog"
        Lambswool with Sheepskin Slippers Brown Hard Suede World Mens Sole Upper Thick Extra Deluxe Moccasin }
    ],
    "require": {
        Hard Sheepskin Sole Upper Mens Deluxe Slippers Moccasin Thick World Brown Suede with Lambswool Extra "symfony/monolog-bundle": "2.0"with Sole World Slippers Extra Brown Mens Deluxe Thick Moccasin Hard Lambswool Upper Sheepskin Suede ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Thick Moccasin Deluxe Sole Slippers Hard Brown Suede Mens with Lambswool Sheepskin Upper World Extra }

That will fetch the dev-bugfix version of Extra Slippers Brown Mens with Sheepskin Suede Lambswool Deluxe Sole World Moccasin Thick Upper Hard 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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