Add repos.conf into container

Dockerfile

@@ -13,6 +13,9 @@ RUN eselect profile set "default/linux/amd64/17.1/no-multilib/systemd/merged-usr
 RUN rm --one-file-system /etc/portage/make.conf
 COPY make.conf /etc/portage/make.conf
 RUN chown root:root -R /etc/portage/make.conf
+# Add overlays in /var/db/repos.
+COPY repos.conf /etc/portage/repos.conf
+RUN chown root:root -R /etc/portage/make.conf
 # Update the compiler
 RUN emerge --oneshot --usepkg sys-devel/gcc:13
 RUN eselect gcc set x86_64-pc-linux-gnu-13 && source /etc/profile

repos.conf/gentoo.conf

@@ -0,0 +1,9 @@
+[DEFAULT]
+main-repo = gentoo
+
+[gentoo]
+auto-sync = no
+location = /var/db/repos/gentoo
+# higher priority number mean preferation in case ebuilds exist in >1 repo.
+priority = 9999
+volatile = yes

repos.conf/holgersson-overlay.conf

@@ -0,0 +1,7 @@
+[holgersson-overlay]
+auto-sync = no
+location = /var/db/repos/holgersson-overlay
+masters = gentoo
+# higher priority number mean preferation in case ebuilds exist in >1 repo.
+priority = 10
+volatile = yes

repos.conf/overlay.conf

@@ -0,0 +1,7 @@
+[local]
+auto-sync = no
+location = /var/db/repos/overlay
+# higher priority number mean preferation in case ebuilds exist in >1 repo.
+priority = 20
+masters = gentoo
+volatile = yes