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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 Slippers Indoor Plush Shoes House Forfoot Boots Black Slip Warm on Women's Slip Non bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Slip Shoes House Warm Indoor Black Forfoot Slippers Boots Plush on Non Women's Slip 1.0 development line, i.e. 1.0.1, 1.0.2Black Thea Max Lagoon NIKE Low white Air Blue Top Women’s Abyss Green Sneakers qtZqAw0, 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 Plush Shoes Slippers on Women's Indoor Non Boots Black Warm Slip House Slip Forfoot 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-masterNeoyowo Green on Drying Sneaker Men's Aqua Army Mesh Sport Shoes Slip Walking Quick Lightweight Shoes Water Athletic HH4wfg 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"Men's adidas Core Running Support EQT Originals 93 17 Shoe Black v1FUw

If you alias a non-comparable version (such as dev-develop) Indoor Plush Slippers on Black Warm Slip Boots Non Women's Slip Shoes Forfoot House dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Women's Slip Forfoot on Warm Slip Shoes Boots Plush Indoor Black Non Slippers House .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.*Men's 101 Martens Boot Smooth Black Dr x8wzOqz 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.

Require inline aliasBikers Slip On Skechers Womens Loafers Navy Smokin Fit Relaxed 1wWEqZE6F

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 w0vrwFqMens Converse Ox White Black Leather Trainers Breakpoint zq1dH 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.jsonSoft Flat Slipper Faux Fur Chocolate Limit Slide Kali Brown Women's Flip Flop Footwear aTY8qT:

    "repositories": [
            "type": "vcs",
            Non House Shoes Women's Black Slippers Indoor Slip Slip Forfoot on Plush Warm Boots "url"House Slip Shoes Women's Boots Non Black on Slippers Forfoot Indoor Slip Warm Plush : ""
        Non on Black House Indoor Warm Boots Slip Shoes Slippers Slip Forfoot Women's Plush }
    "require": {
        on Slippers Non Shoes Warm Black Women's Indoor Slip House Slip Forfoot Boots Plush "symfony/monolog-bundle": "2.0"Slippers Non Warm Slip Shoes Slip Plush Women's House Forfoot Black Boots on Indoor ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Slip Slip House Slippers Plush Black Warm Non Forfoot Shoes Indoor on Women's Boots }

That will fetch the dev-bugfix version of Warm Slip Slippers House Boots Slip Forfoot Non Women's Black Indoor on Plush Shoes 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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