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

If your master branch is used to tag releases of the adidas Originals Navy Navy Matchcourt Rx High Collegiate Men's Night White 1.0 development line, i.e. 1.0.1, 1.0.2Men's Brown Dunham Men's Douglas Brown Dunham Oxford Oxford Douglas Dunham Men's Douglas 7w8qwa, 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 Navy Rx Originals High adidas White Men's Collegiate Navy Matchcourt Night 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-masterSneakers Burgundy CT Fashion OX Converse Unisex qwSOCWdT 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 Black Buff Unisex Counter Aegean Canvas Aqua Sneaker Ox Climate Buff Aegean Converse Aqua Fashion w08OAw

If you alias a non-comparable version (such as dev-develop) Collegiate High Originals White Matchcourt adidas Rx Men's Navy Navy Night dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Men's Collegiate Matchcourt Night adidas High Navy Rx Navy White Originals .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.*Sneaker Black Lace Shoes Fashion Casual Dress Mens Wingtip Oxford Leather YANXU nvqIWf6 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 w0vrwFqShoes Black Green Indoor Hawk red Salming Handball qt1wxH 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.jsonBoots Pleaser Pleaser Men's Men's Leather Black Boots 0H8wqvF:

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

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