docker: merge psdk-doc-docker and add workflow

Merge my old stand alone container repo into this one. I'll update the
upstream to start redirecting users here. Move rstcheck into the
requirements file so it doesn't install a conflicting version of
docutils.

Add a workflow with max cacheing enabled.

Signed-off-by: Randolph Sapp <[email protected]>

.github/workflows/docker.yml

@@ -0,0 +1,51 @@
+---
+name: Docker Workflow
+on:
+  push:
+    branches: [master]
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log into registry ${{ env.REGISTRY }}
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Setup context
+        run: make -C docker setup
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          platforms: linux/amd64
+          context: docker
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }} latest
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

docker/.gitignore

@@ -0,0 +1 @@
+requirements.txt

docker/Dockerfile

@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Copyright (C) 2024 Randolph Sapp
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, see <https://www.gnu.org/licenses/>.
+
+FROM debian:stable-slim
+
+RUN apt-get update \
+	&& DEBIAN_FRONTEND=noninteractive apt-get install -y \
+		--no-install-recommends \
+		dumb-init \
+		git \
+		gosu \
+		make \
+		python3-pip \
+		ripgrep \
+		zip \
+	&& echo "**** create abc user and make our folders ****" \
+	&& useradd -u 1000 -U -d /config -s /bin/false abc \
+	&& usermod -G users abc \
+	&& mkdir /build && chown abc:abc /build \
+	&& mkdir /config && chown abc:abc /config \
+	&& echo "**** cleanup ****" \
+	&& apt-get autoremove \
+	&& apt-get clean \
+	&& rm -rf \
+		/tmp/* \
+		/var/cache/debconf/*-old \
+		/var/lib/apt/lists/* \
+		/var/lib/dpkg/status-old \
+		/var/lib/sgml-base/supercatalog.old \
+		/var/log/apt/term.log \
+		/var/tmp/*
+
+RUN --mount=type=bind,source=requirements.txt,target=/tmp/requirements.txt \
+	python3 -m pip install -r /tmp/requirements.txt --no-cache-dir \
+		--break-system-packages
+
+COPY root/ /
+
+WORKDIR /build
+VOLUME /build
+
+ENTRYPOINT ["/init"]
+CMD ["/bin/bash"]

docker/Makefile

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# Copyright (C) 2024 Randolph Sapp
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, see <https://www.gnu.org/licenses/>.
+
+ifeq ($(CONTAINER_TOOL),)
+  $(info CONTAINER_TOOL unset, checking if docker is present...)
+  ifneq ($(shell which docker 2> /dev/null),)
+    $(info Using docker for build...)
+    CONTAINER_TOOL := docker
+  else ifneq ($(shell which podman 2> /dev/null),)
+    $(info Using podman for build...)
+    CONTAINER_TOOL := podman
+  endif
+endif
+
+.PHONY: all setup
+all: Dockerfile setup
+	$(CONTAINER_TOOL) build . -t texasinstruments/processor-sdk-doc \
+		$(BUILD_ARGS)
+
+setup: requirements.txt
+
+requirements.txt:
+	cp -ar ../requirements.txt .

docker/README.md

@@ -0,0 +1,33 @@
+# psdk-doc-docker
+
+A simple docker container to build
+[processor-sdk-doc](https://github.com/TexasInstruments/processor-sdk-doc).
+
+
+## Why
+
+Preempting incompatibility as that repos is still using some deprecated sphinx
+calls. Sphinx has some dependency resolution issues when mixing system and local
+python library installations that causes unusual artifacts. This guarantees a
+reproducible build output.
+
+
+## Building
+
+You need podman or docker for building. If either one of those is already
+installed then just run `make`.
+
+
+## Usage
+
+New tooling has unified the invocation of Podman and Docker by fetching the
+owner of the build directory and remapping an internal user to satisfy build
+requirements. It will fail if the directory owner is in a reserved uid/gid
+region.
+
+After starting the container with your preferred container tool, follow the
+instructions for building the documentation as usual.
+
+```bash
+docker run -it --rm -v "$PWD":/build ghcr.io/texasinstruments/processor-sdk-doc
+```

docker/root/init

@@ -0,0 +1,60 @@
+#!/bin/bash
+
+# SPDX-License-Identifier: GPL-2.0
+
+# Copyright (C) 2024 Randolph Sapp
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, see <https://www.gnu.org/licenses/>.
+
+get_attribs() {
+	local file_stats file_to_test useful_attribs
+	if file_to_test=$(realpath "$1") && [[ $2 =~ ^[0-9]+$ ]] ; then
+		useful_attribs=$(stat "$file_to_test" -t)
+		read -r -a file_stats <<< "${useful_attribs#"$file_to_test"}"
+		echo "${file_stats["$2"]}"
+	else
+		return 1
+	fi
+}
+
+get_build_uid() {
+	get_attribs /build 3
+}
+
+get_build_gid() {
+	get_attribs /build 4
+}
+
+if NEW_GID=$(get_build_gid) && NEW_UID=$(get_build_uid); then
+	# bypass everything if podman is remapping the id to root
+	if [ "${NEW_UID}" == "0" ]; then
+		if [ "$(id -u)" == "0" ]; then
+			exec dumb-init -- "$@"
+		else
+			echo "Unable to resolve ns mapping!"
+		fi
+	fi
+
+	# change the uid and gid of abc otherwise
+	[ "$NEW_GID" != "$(id -g abc)" ] && groupmod -g "${NEW_GID}" abc
+	[ "$NEW_UID" != "$(id -u abc)" ] && usermod -u "${NEW_UID}" abc
+else
+	echo "Not able to detect UID/GID for remapping!"
+fi
+
+if [ "$(id -u)" == "$(id -u abc)" ]; then
+	exec dumb-init -- "$@"
+else
+	exec dumb-init -- gosu abc "$@"
+fi

requirements.txt

@@ -21,3 +21,4 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
 urllib3==2.2.1
+rstcheck==3.3.1