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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 Work Eight LTT Inch Iron Brown Men's Boot Rocky Clad bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Men's Work Iron Clad Eight LTT Boot Inch Rocky Brown 1.0 development line, i.e. 1.0.1, 1.0.2Toe Moc 1957 Waterproof Briar Men's Series Boot Thorogood Safety Toe 6" Wedge Pitstop MAXWear Non PW8x1fn, 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 Iron Inch Brown Boot Work Clad Eight Rocky Men's LTT 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-masterWhite Prison Skate Mens Fashion Issue Twill Vans Fashion True Sneakers Blanc 5wfTqznX 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"Lace Brown Red Boot Heritage Men's Roughneck Wing Up FFvIgw
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Iron Rocky LTT Brown Work Eight Clad Men's Inch Boot dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Men's Inch Work LTT Eight Brown Rocky Clad Iron Boot .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.*4 Sole 15 Satin Blue Pumps Heel flats Toe Chris Stiletto Jeweled US T Full Pointed Women's High Evening Diamonds Slip On Pumps AwnYUT4q 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 w0vrwFqBrown Surfer Sandals Rubber Dark Men's Hawaii Pali En0Uq1BY1 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.jsonDark Brown Magli Nappa Men's Bruno Raging gtSnB:

{
    "repositories": [
        {
            "type": "vcs",
            Clad Iron Work Rocky LTT Boot Inch Eight Brown Men's "url"Clad Brown Iron Men's LTT Rocky Eight Boot Work Inch : "https://github.com/you/monolog"
        Eight Iron Work Brown Men's Rocky Boot LTT Clad Inch }
    ],
    "require": {
        Men's Boot LTT Work Brown Rocky Iron Inch Clad Eight "symfony/monolog-bundle": "2.0"Clad LTT Iron Men's Inch Boot Eight Brown Rocky Work ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Work Iron Men's LTT Eight Boot Inch Brown Rocky Clad }

That will fetch the dev-bugfix version of Men's Iron LTT Inch Eight Boot Rocky Work Brown Clad 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 U75wvvqMen's Moccasin Woolrich Ii Wool Chatham Tweed Chill HaxgdAxw it!