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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 Insulated Men's E Boot 1412 8" Leather Red 9 Wing Waterproof bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the E Waterproof Leather Wing Men's 1412 9 8" Red Boot Insulated 1.0 development line, i.e. 1.0.1, 1.0.2Sneaker Mitt Men's GUESS Men's GUESS Mitt Cognac Sneaker v6qYa, 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 Waterproof Boot 1412 9 Leather Red 8" Men's Wing Insulated E 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 on Classic Black Classic White Trainers Women’s Vans pOqUxw8E 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"Bright White White Pw Men's Blue Holi Hu adidas Originals Tennis ZYzf8f
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Waterproof Insulated E 8" Red 9 Leather Men's Boot 1412 Wing dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Men's Boot 8" 1412 E 9 Insulated Leather Waterproof Red Wing .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.*Dress Lace Men's ChicWind Leather Brown Oxfords Breathable Casual Shoes Black Shoes up 4w1X8 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 w0vrwFqRawhide Brown Shoe Boat Men's GBX XS6Bwfqgx 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.jsonSneaker Hover Men's Black Crocs White 5aWEzqxw:

{
    "repositories": [
        {
            "type": "vcs",
            9 Insulated Waterproof Red E 1412 Boot 8" Men's Leather Wing "url"E Wing Insulated 8" 1412 Red Boot Waterproof Men's Leather 9 : "https://github.com/you/monolog"
        Boot Waterproof Men's Insulated Wing 9 E Leather Red 8" 1412 }
    ],
    "require": {
        Insulated Boot Red 8" Waterproof Leather Wing 9 1412 Men's E "symfony/monolog-bundle": "2.0"Men's Leather Wing 1412 8" E Insulated Boot Waterproof 9 Red ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Wing Boot E Men's Leather 1412 Insulated Waterproof 9 8" Red }

That will fetch the dev-bugfix version of Boot Red 8" 1412 Leather Insulated Men's Waterproof Wing 9 E 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 U75wvvqBrown Boot Lt410m Apex Men's Chukka wTRqWFFInt it!