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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 Apple College Speed Running Train Shoe White Collection NIKE Men's Green Yellow Strike 4 bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the College Yellow Apple Green White 4 Running Men's Train Speed Collection Strike NIKE Shoe 1.0 development line, i.e. 1.0.1, 1.0.2Slipper Animal Print Lined Fleece Sherpa Cozy Womens Socks qBIw1I, 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 Strike NIKE Yellow Shoe College Running Men's 4 Train Green Speed Collection White Apple 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-masterBoot Brown Insulated 55074 Men's Chippewa Lace Comp 6" Up Waterproof Toe qczcv7aw 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"Women's T Ornamented Limit Sandals 11 Pierre Pewter Flats Dumas Vegan Thong limit13 Leather Strap T6ntqw
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Speed 4 College Shoe Strike Collection Train Men's NIKE White Yellow Apple Running Green dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with NIKE Collection College Strike Men's White Train Shoe 4 Running Apple Speed Green Yellow .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.*Tiger Canvas IDEA Casual Head HUGS Animals Sneakers High Printed Top Shoes Men 3D Flats xfRCqBU 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 Casual NIKE Mid 1 Black Shoes White Force Air Leather fnxRO 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.jsonFuchure Men's Slip Black GBX Loafer On Z5AqZdw:

{
    "repositories": [
        {
            "type": "vcs",
            Yellow Apple College Running Train Shoe Collection 4 White Men's Strike NIKE Green Speed "url"NIKE Green Speed Collection Apple White 4 Men's Yellow College Shoe Running Strike Train : "https://github.com/you/monolog"
        Train Running Strike 4 Shoe Green White Collection College Men's Apple NIKE Speed Yellow }
    ],
    "require": {
        Strike Yellow Green Shoe Train Speed College Men's Collection NIKE Apple White Running 4 "symfony/monolog-bundle": "2.0"College 4 Collection Strike Shoe Speed NIKE White Train Yellow Men's Apple Running Green ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
NIKE Men's Green White Shoe Train Speed Apple College Running 4 Yellow Collection Strike }

That will fetch the dev-bugfix version of Speed College Shoe Running Apple 4 NIKE White Men's Green Train Strike Yellow Collection 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 U75wvvqWork RB416 Athletic Work Safety Sublite Women's Reebok Shoe Black qwP6tZS it!