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Composer is an application-level dependency manager for the PHP programming language that provides a standard format for managing dependencies of PHP software and required libraries. It was developed by Nils Adermann and Jordi Boggiano, who continue to manage the project.
Alternatively, the existing dependency, along with all software that depends on it, must be uninstalled in order to install the new dependency. A problem on Linux systems with installing packages from a different distributor is that the resulting long chain of dependencies may lead to a conflicting version of the C standard library (e.g. the ...
The following unify package management for several or all Linux and sometimes Unix variants. These, too, are based on the concept of a recipe file. AppImage (previously klik and PortableLinuxApps) aims to provide an easy way to get software packages for most major distributions without the dependency problems so common in many other package ...
For example, many Linux distributions use Advanced Packaging Tool (APT), commonly found in Debian based distributions, or Yellowdog Updater, Modified found in Red Hat based distributions. There are also multiple independent package management systems, such as pacman, used in Arch Linux and equo, found in Sabayon Linux .
An early package manager was SMIT (and its backend installp) from IBM AIX. SMIT was introduced with AIX 3.0 in 1989. [citation needed]Early package managers, from around 1994, had no automatic dependency resolution [3] but could already drastically simplify the process of adding and removing software from a running system.
Inherited from the design of Nix, most of the content of the package manager is kept in a directory /gnu/store where only the Guix daemon has write-access. This is achieved via specialised bind mounts, where the Store as a file system is mounted read only, prohibiting interference even from the root user, while the Guix daemon remounts the Store as read/writable in its own private namespace.
Framework components are versioned independently and released as separate Composer packages. Dependencies between framework components are declared as Composer dependencies using semantic versioning ranges. Prior to Zend Framework version 2.5 all components shared the same version.
Users can make subdirectories here as well, allowing for custom organization. For example, if a masked package had multiple masked dependencies, the user could make a directory with the name of the original masked package, and put all the mask files for the package and its dependencies in that directory.