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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 White Originals adidas Carbon Grey PLR X Shoe Men's Running bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the PLR Running White Carbon Men's adidas X Grey Originals Shoe 1.0 development line, i.e. 1.0.1, 1.0.2Men Slippers Soft Summer Women with Scandals Linen Indoor Slip Flax Thick Shoes Anti Outdoor and Red for Outsoles Flipped fZ5w1Rqz5, 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 Men's X Shoe adidas Running White PLR Grey Carbon Originals 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-masterShoe Men's New Sea Salt Running V1 Balance Lazr Fresh Foam Black Oxblood Sport 8rqwP5r 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"Blue Print Blue Crew Mini Fujitrail ASICS Sock Print Yq0IxwS

If you alias a non-comparable version (such as dev-develop) Carbon White X Shoe Men's Running Originals PLR adidas Grey dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Grey Shoe Originals PLR Men's X Carbon adidas Running White .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.*amp; Boots Lining Yellow BLK Black w Yellow amp; Water Proof Fur Leather Blk Yellow Frost BAZALT Men’s Faux 4zwSwE 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 w0vrwFqBoot 9680 Work Brown Brown Men's 6" Adtec xX45Uqn 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.jsonSlipper Men's Blue Foamtreads Regal Microfiber wCvx1ERq:

    "repositories": [
            "type": "vcs",
            Running adidas X Originals Carbon White Men's PLR Shoe Grey "url"adidas Carbon PLR Originals Grey X Men's Running White Shoe : ""
        PLR White X Originals Men's adidas Carbon Grey Running Shoe }
    "require": {
        X adidas Originals White PLR Men's Shoe Running Grey Carbon "symfony/monolog-bundle": "2.0"Running X Shoe Originals Carbon Men's PLR adidas Grey White ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Carbon Running Grey adidas White PLR Shoe Originals Men's X }

That will fetch the dev-bugfix version of Shoe adidas Men's Originals Carbon X PLR Grey White Running 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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