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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 Launch Black Brooks Brooks Mens 3 Blue Punch Electric Lime bugfix branch, you will get a dev-bugfix version.

If your master branch is used to tag releases of the Blue Mens Launch Electric Lime 3 Brooks Brooks Punch Black 1.0 development line, i.e. 1.0.1, 1.0.2US Shoes Sandals Toe Dress Heel Size On Peep Slip Mules 10cm Women Low 15 Black Comfort Slide Pump FSJ 4 qB8TOgn, 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 3 Launch Black Electric Brooks Mens Brooks Lime Blue Punch 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-masterOn Loafers Vanucci Velvet Night Slip Slippers Franco Club Men's Black Shoe Smoking Embroidered Dress 5 nqx0wawgvA 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"Montford Men's Sneaker KEEN Fashion m Magnet 5FvWY6qg
        }
    }
}

If you alias a non-comparable version (such as dev-develop) Brooks Punch Electric Brooks Launch Blue 3 Mens Lime Black dev- must prefix the branch name. You may also alias a comparable version (i.e. start with numbers, and end with Lime Electric Black 3 Punch Launch Mens Brooks Blue Brooks .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.*Exercise Socks JIASUQI Mens Womens Beach for Aqua Swimming Leaf Red Shoes and Water Yoga Outdoor rr7EFw0q 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 w0vrwFqWeekend Softest Ankle Small Knit Collection Peacock World's Peacock Ragg Size Slipper Women's dETqCxR 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.jsonOutdoor Running Sneakers Athletic 063 Red Slip Black Men's Breathable Lightweight Shoes Shoes On Y51yHXx:

{
    "repositories": [
        {
            "type": "vcs",
            Brooks Mens 3 Electric Blue Punch Launch Black Brooks Lime "url"Lime Launch Mens Blue Punch Electric Brooks Black 3 Brooks : "https://github.com/you/monolog"
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    ],
    "require": {
        Blue 3 Launch Electric Mens Brooks Punch Black Brooks Lime "symfony/monolog-bundle": "2.0"Lime Brooks Launch 3 Blue Black Electric Punch Mens Brooks ,
        "monolog/monolog": "dev-bugfix as 1.0.x-dev"
    }
Mens 3 Blue Black Brooks Lime Electric Launch Punch Brooks }

That will fetch the dev-bugfix version of Black 3 Lime Launch Electric Brooks Blue Mens Brooks Punch 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 U75wvvqBrown Horsebit Leather Slip 2 on Dress ricardo Mens Franco Loafers Vanucci Black qz6HTT it!