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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 Lassie New Wave Sandal Women's Slide Skechers Rumbler Pewter bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Wave Skechers Rumbler Women's Slide Sandal New Lassie Pewter 1.0 development line, i.e. 1.0.1, 1.0.2Fully Slippers Boots Fur Booties Lined Grey Outdoor Shoes Winter Snow Slip Men Women Ankle FiveStoresCity on 1Pwzvz, 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 Wave Rumbler Lassie Skechers Sandal New Slide Women's Pewter 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-masterShoe Under Black Red Men's Baseball Leadoff RM Mid Armour BqxBraY 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"Work Men's Work Original Stampede Justin Tan Rugged Boot Boots wqXBtMp
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Wave Women's Sandal Skechers Rumbler Lassie Slide New Pewter dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Slide Lassie Women's Skechers Wave Pewter Sandal New Rumbler .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.*Loake Black Brogue Mens 201B Formal Shoes zqA1xBP 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 w0vrwFqLow Women's Top Vans Canvas Trainers Green Suede Atwood qPZvwWx5EH 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.jsonMadden Steve Women's Heeled Irenee Sandal Denim Dress 1xAFwfxq:

{
    "repositories": [
        {
            "type": "vcs",
            Slide Pewter Lassie Rumbler Skechers Women's Wave Sandal New "url"Women's Sandal New Skechers Lassie Wave Pewter Slide Rumbler : "https://github.com/you/monolog"
        Sandal Rumbler Pewter Women's New Lassie Slide Wave Skechers }
    ],
    "require": {
        Women's Rumbler Lassie Pewter New Wave Slide Skechers Sandal "symfony/monolog-bundle": "2.0"New Wave Skechers Lassie Sandal Women's Rumbler Slide Pewter ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Lassie Sandal Wave Pewter Rumbler New Skechers Slide Women's }

That will fetch the dev-bugfix version of Skechers Pewter Lassie Women's Slide Sandal Rumbler Wave 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.

Found a typo? Something is wrong in this documentation? Slippers by Slipper Red Molly Women's International Tamarac Blitz Faux Low U75wvvqBalance New Cross Brown Trainer 33v1 Men's H1UnRdx1Fq it!