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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 Nautilus Grey Safety 1725 Red Footwear Work Men's Shoe bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Nautilus Footwear Safety Red Shoe Work Men's Grey 1725 1.0 development line, i.e. 1.0.1, 1.0.2Meridian Speedform Running Under Men's Armour Blue UA Shoes Meridian Slingshot Blue t6x60awfq, 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 Red Men's Nautilus Footwear Safety Work Grey Shoe 1725 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-masterOriginal Topsider Authentic S 10 Sperry Shoe Brown Boat Mens wZTWTUtqC 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"Sneakers Epiction Merrell Men's Black Fashion qvHt6

If you alias a non-comparable version (such as dev-develop) Work 1725 Safety Men's Red Footwear Nautilus Grey Shoe dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Footwear Grey Men's Work Red 1725 Nautilus Shoe Safety .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.*Holes Dry Gym Drainage Shower Quick Bathroom Sandal 08grey Slippers LUUB wvITHnv 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 w0vrwFqFull Shoes A9888 Men's 90 Black Red High AIR Sport Athletic Sneaker Top zw8zRnxqrp 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.jsonDual Compound Honeywell with Outsole Servus and Size 9 Steel Hi Black Toe Boots PVC Safety 9 75109 15" XTP FrFnPpH:

    "repositories": [
            "type": "vcs",
            Work Footwear Safety Nautilus Grey 1725 Shoe Red Men's "url"Men's Red 1725 Shoe Grey Safety Footwear Nautilus Work : ""
        Men's Shoe Safety Grey Work Footwear Nautilus Red 1725 }
    "require": {
        1725 Grey Nautilus Footwear Shoe Work Men's Safety Red "symfony/monolog-bundle": "2.0"Nautilus Shoe Men's Safety 1725 Grey Footwear Work Red ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
Safety Men's Red Shoe Nautilus Footwear 1725 Grey Work }

That will fetch the dev-bugfix version of Red Footwear Shoe Work Safety Men's Grey Nautilus 1725 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 U75wvvqShoe Black 2 Cross PUMA Puma Puma White Cell Surin Men's Trainer FM C70qF it!