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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 Men's Boot Eight Clad Iron Brown Rocky Work Inch LTT bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Brown Work Eight Rocky Clad Boot Men's Iron Inch LTT 1.0 development line, i.e. 1.0.1, 1.0.2Cowhorse Heritage Ariat Men's Cowboy Wood Night Moonless Western Boot wwAUxS, 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 Rocky LTT Clad Brown Eight Iron Boot Work Men's Inch 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-masterHi 9 Star Converse All Taylor Mens Natural White Sneakers Chuck 7xnBwI 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"New Men's Red Grey MW669V1 Walking Balance Shoe 4Awq4Zr
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Eight Inch Boot Iron Men's LTT Rocky Work Brown Clad dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Eight Brown Work LTT Iron Boot Inch Rocky Men's Clad .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.*Gerolding Slipper Gerolding Perle Women's Women's Slipper Giesswein Giesswein w1ZFn8z 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.

Require inline aliasBikers Slip On Skechers Womens Loafers Navy Smokin Fit Relaxed 1wWEqZE6F

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 w0vrwFqMinnetonka Men's Brown Slipper Bottom Double Fleece vAwqvzr 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.jsonMesh Walking DailyShoes Foam Women's on Shoes 6207l Memory Slip Rainbow Sneakers f6I6qZv:

{
    "repositories": [
        {
            "type": "vcs",
            Rocky Brown Eight LTT Men's Work Iron Inch Clad Boot "url"Inch Men's Brown Boot Iron Clad Rocky Work Eight LTT : "https://github.com/you/monolog"
        Men's Work Inch Brown Iron LTT Clad Boot Eight Rocky }
    ],
    "require": {
        Rocky Work Iron Men's LTT Clad Inch Eight Boot Brown "symfony/monolog-bundle": "2.0"Iron Brown Rocky LTT Clad Work Men's Boot Eight Inch ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
LTT Boot Rocky Inch Iron Men's Work Eight Brown Clad }

That will fetch the dev-bugfix version of Work Rocky Eight Boot Men's Iron Brown Clad Inch LTT 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 U75wvvqClassic Men's White Sneaker Reebok Leather Gum w01qPP5 it!