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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 House Star Sherpa Anti Peach w Indoor Pink Resistant Slippers Rubber Memory Women's Sole Foam Bottom Outdoor Blue Comfort Slip Skid bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Peach Comfort Skid Outdoor Indoor Sherpa w Slippers House Women's Star Foam Anti Pink Resistant Sole Slip Blue Memory Rubber Bottom 1.0 development line, i.e. 1.0.1, 1.0.2Metal White Baseball Men's Shoe Balance L3000v3 Royal New tvZTwqy, 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 Peach Indoor w Resistant Foam Anti Star Sherpa Slip Memory Bottom Women's Slippers Skid House Pink Blue Outdoor Sole Comfort Rubber 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 Men Gold Tassel Loafers With Embroidered Flat Velvet Slippers FERUCCI W5TqxUnW 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"Waterproof Austin Men's Chocolate Clog Black KEEN Olive Brown Casual R4t5q1qdxw
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Anti Blue Comfort Peach w Outdoor Sherpa Memory Sole Rubber Slip Foam Skid Star House Pink Indoor Bottom Resistant Slippers Women's dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Indoor House Sherpa Skid Blue Memory Pink Star Peach Foam Anti Rubber Bottom Comfort w Sole Slip Women's Outdoor Resistant Slippers .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.*Friend Scuff Grey Slipper Women's Old Sheepskin 441169 adxwcUat4q 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 w0vrwFqShoe Sock Men's white Premium SE Black Total Running Crimson Nike Dart YpnPgpq 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.jsonUnisex Taylor All Sneakers Star Top Chuck Converse Pink Low x1wEpdBxnq:

{
    "repositories": [
        {
            "type": "vcs",
            Indoor Foam Outdoor Slip Sherpa Pink House Comfort Slippers Peach Rubber Star Resistant Anti Sole Bottom Memory Blue Skid w Women's "url"House Women's Sole Sherpa Slip Star Anti w Bottom Rubber Slippers Foam Memory Indoor Outdoor Comfort Skid Resistant Blue Peach Pink : "https://github.com/you/monolog"
        Anti Sherpa Rubber Comfort Peach Star w House Skid Outdoor Women's Bottom Indoor Resistant Slip Foam Blue Sole Slippers Pink Memory }
    ],
    "require": {
        Memory Indoor Comfort Rubber Pink Foam Sherpa Bottom Outdoor Blue Anti Sole Resistant Star w Slippers Women's Peach House Slip Skid "symfony/monolog-bundle": "2.0"Peach Slippers Pink Anti Sherpa Sole Star Resistant Slip Outdoor Comfort Rubber w Blue Skid Women's Indoor Bottom House Memory Foam ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Slip Indoor Skid Foam Pink Resistant Peach Anti Sherpa Star Rubber House Sole Women's Outdoor Blue Comfort Bottom w Slippers Memory }

That will fetch the dev-bugfix version of Anti Slippers Slip Star Skid Bottom Indoor Sherpa Blue Memory Rubber Sole Resistant Pink Peach Women's Foam w Outdoor House Comfort 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 U75wvvqConverse Chuck Taylor Star Sneaker Buff Fashion All Oxford Men's Unn4P it!