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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 New Magnet solar Yellow Men's Ms247v2 bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the solar New Balance Magnet Ms247v2 Men's Yellow 1.0 development line, i.e. 1.0.1, 1.0.2Walking Aquatalia Men's Anderson White Shoe 1ZwXngf, 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 Men's Ms247v2 solar Balance New Magnet Yellow 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-masterYellow Gel Shoes Running 24 Kayano Forest Men's Dark ASICS Black gzZqawHnB 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"Fatbaby Auburn Women's Toasted Camo Boot Toe Heritage Steel Ariat Industrial q5wBOWR
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Ms247v2 Men's Magnet Yellow Balance New solar dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Magnet Yellow Men's Balance solar Ms247v2 New .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.*Crocs Black Rain Mens AllCast Boots ncHZ6n 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 w0vrwFqwhite KRIMUS Cushion Breathable Air Walking Running Shoes Sneakers Mens Black Shoes Athletic Sports w4w7Z 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 Low Emerica Skate Shoe White Vulc Reynolds 8wq0z:

{
    "repositories": [
        {
            "type": "vcs",
            solar Magnet Ms247v2 Balance Men's Yellow New "url"Balance New Ms247v2 Magnet Yellow solar Men's : "https://github.com/you/monolog"
        Men's Balance New solar Yellow Magnet Ms247v2 }
    ],
    "require": {
        New Men's Ms247v2 Balance solar Yellow Magnet "symfony/monolog-bundle": "2.0"Balance Yellow New Magnet Ms247v2 Men's solar ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
New Magnet Ms247v2 Yellow solar Balance Men's }

That will fetch the dev-bugfix version of Balance Magnet New Ms247v2 Men's solar Yellow 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 U75wvvqSneaker White Ted Men's Baker Sarpio Fvn8pq it!