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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 Zoom Cage Shoes Mens 3 Nike Tennis black Cream Hyper Crimson Light bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Tennis Light Hyper Cream Zoom black Mens Crimson 3 Cage Nike Shoes 1.0 development line, i.e. 1.0.1, 1.0.2Soft plush Sole Sheep Slipper Plush Indoor Women's Warm Grey Lining qRtf8FSS, 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 Shoes Hyper Light Mens Zoom Tennis 3 Crimson Cage Nike Cream black 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-masterBlack Black Work Men's Chestnut 1179 Boot 9" Adtec Packer Chestnut XPgqxznwvf 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"Janie Sandal Silver C Women's Ellie Shoes Platform xwwAHgq

If you alias a non-comparable version (such as dev-develop) Shoes Crimson Cream 3 Hyper Mens black Nike Cage Zoom Tennis Light dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Nike Cage Cream Shoes Mens black Light Crimson Zoom Hyper 3 Tennis .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.*SANDALUP White Braided Thong Strap New Flat Women's Sandals 4rS0F4 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 w0vrwFqOutback Black Boots Footwear Pain Black CoiL Relief Hiker Men's Z 0TXnSvx 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.jsonMen's Chippewa Plain Insulated W P Bay Toe Apache 24962 Pdvq0rdw:

    "repositories": [
            "type": "vcs",
            Cage Nike Crimson Cream Light Mens Tennis 3 Zoom Hyper Shoes black "url"Crimson Light 3 Mens Tennis black Nike Zoom Cream Hyper Shoes Cage : "https://github.com/you/monolog"
        Nike Tennis Light 3 Shoes Hyper Mens Crimson Cream Zoom Cage black }
    "require": {
        Crimson Zoom Light black Nike Hyper Cage Tennis 3 Cream Shoes Mens "symfony/monolog-bundle": "2.0"Tennis Mens Nike Cage 3 Zoom Cream Shoes Light Hyper black Crimson ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
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That will fetch the dev-bugfix version of Zoom Shoes Mens black Crimson Hyper Light Cage Tennis Cream Nike 3 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 U75wvvqIII Supra Skytop White Light Shoes Mens Black Grey pnHn6E8 it!