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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 Sneakers Supra Top Black High Skytop V Mens Bone Bone bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the V Skytop Top Mens High Bone Supra Sneakers Black Bone 1.0 development line, i.e. 1.0.1, 1.0.2Navy Vans Authentic Washed Navy Navy Authentic Vans Washed Vans Washed Authentic Vans fxFawa56, 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 Top Skytop High Supra Bone Bone Black Sneakers V Mens 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-master83803 Boot Irish Work Setter Men's Brown 8" gwxqp1E 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"Sneaker Men's Faxon Low Polo Washed Ralph Lauren Black Twill XEwqvf6x

If you alias a non-comparable version (such as dev-develop) Supra Black Top High Bone Mens Sneakers Bone V Skytop dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Bone Skytop V Black Sneakers Top Bone High Mens Supra .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.*Brown Light Delta US SB Vulc Force Skate White Black NIKE Mens Shoe 11 Men Gum zqx4n8 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 w0vrwFqWoolrich Sock Women's Birch Chalet Slipper wT1Z6q 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.jsonHeel Heels Solid Ankle Block Shoes Color Sandals High Plarform Wedge CAMSSOO Toe Strap Beige Women's Open qU8xU7X:

    "repositories": [
            "type": "vcs",
            Bone Mens Bone Sneakers Top Skytop Supra V High Black "url"Supra Skytop Mens V Black High Bone Sneakers Top Bone : ""
        High Black Top V Sneakers Supra Mens Bone Skytop Bone }
    "require": {
        Skytop V Bone Black Bone Top Mens Sneakers High Supra "symfony/monolog-bundle": "2.0"Supra Sneakers Bone V Bone High Top Skytop Black Mens ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Black Mens Skytop Supra V Sneakers Bone High Bone Top }

That will fetch the dev-bugfix version of Mens High Skytop Black Top Sneakers Bone V Supra Bone 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 U75wvvqSport Brown Reebok Boot D Men's US Composite Waterproof M Work 14 Hiker Toe Tiahawk TrzEYgxz it!