Move from PORTDIR_OVERLAY to repos.conf

This commit fixes the following issues:

  * The PORTDIR_OVERLAY variable has been deprecated by Gentoo.

    With this commit, the variable is no longer written to the
    generated make.conf. Instead, a config file
    /etc/portage/repos.conf/<repo-name>.conf
    is generated for each overlay. The repo name is read from the
    overlay using the portage API. Internally, portage parses
    metadata/layout.conf and profiles/repo_name to obtain the name.

    References:
    https://wiki.gentoo.org/wiki//etc/portage/make.conf
    https://wiki.gentoo.org/wiki//etc/portage/repos.conf

  * All overlays were copied into the same target directory. If the
    same file name occurred in multiple overlays, the last overlay
    would overwrite all previous files with this name. In particular,
    only the metadata/layout.conf of the last overlay was retained,
    so it was not possible to reference the other overlays e.g. via
    the masters entry in the layout.conf or the portage-2 syntax
    for specifying a parent profile from another overlay. Also,
    this created problems when the overlays contained ebuilds
    for the same package, but with differing versions, because
    after copying, the target directory contained both versions of the
    ebuild but only the manifest file of the last overlay.

    With this commit, each overlay is copied into a separate
    sub-directory, e.g. /var/db/repos/<repo-name>.
    This directory is referenced via the location entry in the
    generated /etc/portage/repos.conf/<repo-name>.conf.

Signed-off-by: Felix Bier <felix.bier@rohde-schwarz.com>
Signed-off-by: Matt Turner <mattst88@gentoo.org>

0 files changed, 0 insertions, 0 deletions