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===============
 RPM Interface
===============

.. module:: dnf.rpm

.. function:: detect_releasever(installroot)

  Return the release name of the distribution of the tree rooted at `installroot`. The function uses information from RPMDB found under the tree.

  Returns ``None`` if the information can not be determined (perhaps because the tree has no RPMDB).

.. function:: detect_releasevers(installroot)

  Returns a tuple of the release name, overridden major release, and overridden minor release of the distribution of the tree rooted at `installroot`. The function uses information from RPMDB found under the tree. The major and minor release versions are usually derived from the release version by splitting it on the first ``.``, but distributions can override the derived major and minor versions. It's preferred to use ``detect_releasevers`` over ``detect_releasever``; if you use the latter, you will not be aware of distribution overrides for the major and minor release versions.

  Returns ``(None, None, None)`` if the information can not be determined (perhaps because the tree has no RPMDB).

  If the distribution does not override the release major version, then the second item of the returned tuple will be ``None``. Likewise, if the release minor version is not overridden, the third return value will be ``None``.

.. function:: basearch(arch)

  Return base architecture of the processor based on `arch` type given. E.g. when `arch` i686 is given then the returned value will be i386.
