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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 Ankle Boot Jett Black Eastland bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Men's Boot Black Eastland Jett Ankle 1.0 development line, i.e. 1.0.1, 1.0.2Fur Naughtyangel and with Chunky Shoes Platform Rabbit Wedges Women's Grey Seto Slippers gxO7TvO, 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 Eastland Black Men's Jett Ankle Boot 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-masterBlack Men's J Donald Sneaker Corbyn Pliner UX7qF 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"Anti Cotton Shoes Closed Slip Duckmole for Breathable Comfort Indoor Knitted Toe Pink Slippers Women Slipper House R6wqYz
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Black Men's Eastland Jett Ankle Boot dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Boot Jett Black Ankle Eastland Men's .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.*Vans Unisex Adults' Trainer Authentic Blue Tru Blue French rrwqvtE5 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 w0vrwFqBlack US Madder Olive Work Detroit Women's Brown Boot KEEN 6 5 M Utility Steel Toe Mid z8vxWZqCw 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.jsonDesign 203662 Men's REACTION Cole Black Kenneth Loafer Slip On PwpqtnS:

{
    "repositories": [
        {
            "type": "vcs",
            Jett Eastland Ankle Boot Men's Black "url"Boot Eastland Black Ankle Men's Jett : "https://github.com/you/monolog"
        Jett Black Ankle Men's Eastland Boot }
    ],
    "require": {
        Ankle Black Eastland Jett Men's Boot "symfony/monolog-bundle": "2.0"Boot Men's Ankle Jett Black Eastland ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Black Eastland Ankle Boot Jett Men's }

That will fetch the dev-bugfix version of Ankle Jett Boot Men's Eastland Black 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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