Arch-pacman | Here is a list of the main objects and files from the ALPM

Arch-pacman is a C library. Arch-pacman has no bugs, it has no vulnerabilities, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

Here are some words about the frontend responsibilities. The library can operate only a small set of well defined operations and dummy operations. High level features are left to the frontend ;). For instance, during a sysupgrade, the library returns the whole list of packages to be upgraded, without any care for its content. The frontend can inspect the list and perhaps notice that "pacman" itself has to be upgraded. In such a case, the frontend can choose to perform a special action. Calls for alpm_initialize(), and alpm_release(). Read the configuration file, and parse command line arguments. Based on the action requested, it initiates the appropriate transactions (see pacman_upgrade(), pacman_remove(), pacman_sync() in files upgrade.c, remove.c and sync.c). The frontend is using a configuration file, usually "/etc/pacman.conf". Some of these options are only useful for the frontend only (mainly the ones used to control the output like totaldownload, or the behavior with cleanmethod and syncfirst). The rest is used to configure the library. The file pacman.c has been divided into several smaller files, namely upgrade.c, remove.c, sync.c and query.c, to hold the big parts: pacman_upgrade, pacman_remove, pacman_sync. These 3 functions have been split to ease the code reading.