Add Gentoo dockerfile

.github/workflows/ci.yaml

@@ -112,3 +112,41 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
+  build-gentoo:
+    name: Gentoo Docker Image
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: read
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          # super-linter needs the full git history to get the
+          # list of files that changed across commits
+          fetch-depth: 0
+
+      - name: Log in to Docker Hub
+        uses: docker/[email protected]
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_ACCESS_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/[email protected]
+        with:
+          images: dotfiles
+          tags: gentoo
+
+      - name: Build and push Docker image
+        uses: docker/[email protected]
+        with:
+          context: .
+          file: ./Dockerfile.gentoo
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile.gentoo

@@ -0,0 +1,34 @@
+FROM gentoo/stage3:amd64-openrc
+
+# This is a very up-to-date image, so we aren't going to lock package versions.
+# hadolint ignore=DL3041
+RUN emerge --verbose --noreplace \
+	net-misc/curl \
+	dev-vcs/git \
+	app-admin/sudo \
+	sys-apps/coreutils && \
+	emerge --verbose --depclean
+
+RUN useradd -m max && \
+	echo "max ALL=(ALL) NOPASSWD: ALL" >> /etc/sudoers
+USER max
+ENV USER=max
+
+# NOTE: This is dangerous because it will include decrypted secrets in the image!
+#RUN mkdir -p /home/max/src/miscellaneous
+#COPY --chown=max . /home/max/src/miscellaneous/
+
+RUN mkdir -p /home/max/src && \
+	git clone https://github.com/Maxattax97/miscellaneous.git /home/max/src/miscellaneous
+
+# Overwrite the install script with the latest one in the repository.
+COPY --chown=max install.sh /home/max/src/miscellaneous/install.sh
+
+WORKDIR /home/max/src/miscellaneous
+RUN /bin/sh -o pipefail -c "yes | \
+	AUTOMATED=1 /home/max/src/miscellaneous/install.sh && \
+	emerge --verbose --depclean"
+
+WORKDIR /home/max
+ENTRYPOINT ["/bin/zsh"]
+HEALTHCHECK NONE