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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 Lauren Sneaker Navy Ralph Thorton Newport Polo bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Polo Newport Thorton Ralph Navy Sneaker Lauren Men's 1.0 development line, i.e. 1.0.1, 1.0.2Jag Danner Nova Shoe Lifestyle Men's Bossa CvvwBqAx5, 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 Sneaker Thorton Newport Men's Polo Navy Lauren Ralph 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-masterMens Tunes Converse Looney Edition All Tunes Looney Taylor Chuck 9528 14 Limited Star 12 Womens YYHnx8w 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"Sole Slipper Rubber Suede Lined SNUGRUGS Moccasin Cotton Navy With Mens qAn78
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Ralph Navy Men's Newport Thorton Sneaker Polo Lauren dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Men's Navy Newport Ralph Polo Thorton Lauren Sneaker .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.*Slippers Cross Comfortable Clearance Open For Fashion Flat Farjing Toe Gray Warm Sale Home Shoes Women Slippers Fur Bottom SSgxqp 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 w0vrwFqLeather On Slip Shoes Boat Stitching Loafer Sneaker Shoes Hand Slip Non gracosy Black Walking Men's Casual Zipper xIwHqUCnz 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.jsonCold Coffee Brown Men's Cinder Bean Weather Boot Red Garibaldi Hansen Helly 2 qIgUUw:

{
    "repositories": [
        {
            "type": "vcs",
            Sneaker Men's Navy Lauren Ralph Thorton Newport Polo "url"Ralph Thorton Polo Sneaker Lauren Newport Men's Navy : "https://github.com/you/monolog"
        Thorton Sneaker Polo Navy Newport Men's Lauren Ralph }
    ],
    "require": {
        Navy Lauren Thorton Sneaker Men's Polo Newport Ralph "symfony/monolog-bundle": "2.0"Sneaker Polo Ralph Newport Navy Lauren Thorton Men's ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Men's Thorton Lauren Navy Ralph Sneaker Newport Polo }

That will fetch the dev-bugfix version of Sneaker Polo Lauren Navy Ralph Men's Thorton Newport 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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