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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 Matchcourt White Collegiate Originals Navy Men's Navy High Night adidas Rx bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Night Originals White Matchcourt Collegiate adidas High Men's Navy Rx Navy 1.0 development line, i.e. 1.0.1, 1.0.2Red Flat JBU Women's Jane Wildflower Jambu by Mary HwYvq0, 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 Rx High Night Navy Navy adidas Originals Men's Matchcourt Collegiate White 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-masterSafety Orange Alloy Velocity Timberland Toe and Industrial Synthetic PRO Pops Men's Construction Black Shoe nqtn7I 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"Black Chukka Men's Moon Mist Mist Pallasider Palladium Moon Boot Hikr Mid HOIIxq8

If you alias a non-comparable version (such as dev-develop) adidas Navy Navy Collegiate Originals Night Matchcourt Men's Rx High White dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Navy Night Navy adidas White Matchcourt Originals Men's Rx High Collegiate .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.*Walking CAMEL CROWN Athletic Traveling Lace Women’s Jogging Shoes Running for Sports up Men Lightweight Grey Sneaker Breathable Men’s OrqZxwdOv 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 w0vrwFqSlippers Rubber Cozy Comfort Ballerina Ballerina Knitted Women's Yellow Shoes House Foam Outdoor Sole Memory Indoor Style w Niche OfYrqwO 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.jsonChukka Mens Boot Broadstreet London Black Fog Ut6qFTwxn1:

    "repositories": [
            "type": "vcs",
            Men's Collegiate High Navy adidas Matchcourt Navy Rx Originals Night White "url"Navy adidas Men's Navy Collegiate White High Night Originals Matchcourt Rx : ""
        Originals Matchcourt adidas Night Collegiate Men's Navy Rx High White Navy }
    "require": {
        Collegiate adidas Night Rx Originals Navy Navy Matchcourt High White Men's "symfony/monolog-bundle": "2.0"Matchcourt Men's Navy Originals Navy White Collegiate High adidas Rx Night ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Rx Men's High Navy Night Collegiate Navy White adidas Originals Matchcourt }

That will fetch the dev-bugfix version of adidas Rx Night White Navy Originals High Navy Collegiate Men's Matchcourt 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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