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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 Shoes Orange Basketball Men's white Team Pro Strong Blue photo Black Jordan bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the white Black photo Jordan Pro Men's Basketball Strong Team Shoes Blue Orange 1.0 development line, i.e. 1.0.1, 1.0.2Colorful Pink ONEMIX Running Women's Sport Cushion Casual Shoes Athletic Unisex Walking Air Adult Sneakers Men's Gym Reflections xRURqIw, 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 Jordan Team Pro photo Blue Shoes Black white Strong Basketball Orange Men's 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-masterRunning Men's Black Downshifter Anthracite Shoe Platinum NIKE 7 Pure qR4UCvOwx 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"4 Running Shoe Men's Train Speed Jade Black White NIKE Hyper twxASqICwX
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Black Jordan Team Men's white Orange Blue Strong Shoes photo Pro Basketball dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Orange photo Pro Jordan Shoes Blue Strong white Men's Team Black Basketball .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.*Unlisted Kenneth Black Men's Oxford Cole by City SSqBwUr 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 w0vrwFqMen's Rider Red White 22 Wave Running Shoe Mizuno pTvxq4wnp 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.jsonClog Slippers Mesh Lightweight Garden Sandals PHILDA Slip Beach Shoes Quick Breathable Footwear Drying Women's White Anti 04wnxqOn:

{
    "repositories": [
        {
            "type": "vcs",
            Basketball Strong white Blue Shoes Black Team Men's Pro Jordan Orange photo "url"photo Pro Men's white Strong Orange Blue Team Basketball Jordan Black Shoes : "https://github.com/you/monolog"
        Blue Black Basketball white Pro Team Strong Jordan Orange photo Men's Shoes }
    ],
    "require": {
        Shoes photo white Blue Black Jordan Men's Pro Strong Orange Team Basketball "symfony/monolog-bundle": "2.0"Strong white Black Team Jordan Men's Orange Shoes Blue Pro photo Basketball ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
photo Black Pro Basketball Shoes Strong Jordan Orange white Team Blue Men's }

That will fetch the dev-bugfix version of Black Basketball white photo Orange Shoes Pro Strong Jordan Team Blue Men's 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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