ci: Begin CI pipeline

Makefile

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+BUILDROOT_SRC ?= ~/src/buildroot
+
+.PHONY: all
+all: initramfs rootfs
+
+.PHONY: rootfs
+rootfs: _build/rootfs/.config
+	$(MAKE) -C _build/rootfs -j $(shell nproc)
+
+.PHONY: initramfs
+initramfs: _build/initramfs/.config
+	$(MAKE) -C _build/initramfs -j $(shell nproc)
+
+.PHONY: publish
+publish:
+	rsync -rtliO \
+		_build/rootfs/images/rpi-firmware/ \
+		_build/rootfs/images/Image \
+		_build/rootfs/images/*.dtb \
+		_build/initramfs/images/rootfs.cpio.lz4 \
+		pxe0.pyrocufflink.blue:/var/lib/tftpboot/jenkinsagent-aarch64/
+	rsync -P --no-W \
+		_build/rootfs/images/rootfs.squashfs \
+		pxe0.pyrocufflink.blue:/var/lib/nbd/jenkinsagent-aarch64.squashfs
+
+_build/rootfs/.config:
+	$(MAKE) -C $(BUILDROOT_SRC) O=${PWD}/_build/rootfs BR2_EXTERNAL=${PWD} jenkinsagent_defconfig
+
+_build/initramfs/.config:
+	$(MAKE) -C $(BUILDROOT_SRC) O=${PWD}/_build/initramfs BR2_EXTERNAL=${PWD} jenkinsagent_initramfs_defconfig

ci/Dockerfile

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+FROM registry.fedoraproject.org/fedora:30
+
+ARG UID
+ARG GID
+
+RUN groupadd -g ${GID} jenkins \
+    && useradd -u ${UID} -g ${GID} -m -d /var/lib/jenkins -l jenkins
+
+RUN dnf install -y \
+    bc \
+    bzip2 \
+    cpio \
+    diffutils \
+    g++ \
+    gcc \
+    make \
+    ncurses-devel \
+    openssh-clients \
+    patch \
+    perl-ExtUtils-MakeMaker \
+    perl-Thread-Queue \
+    rsync \
+    wget \
+    which \
+    && dnf clean all

ci/Jenkinsfile

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+pipeline {
+    agent {
+        dockerfile {
+            dir 'ci'
+            args '''
+            -v /etc/ssh/ssh_known_hosts:/etc/ssh/ssh_known_hosts
+            --pids-limit 16384
+            '''
+            additionalBuildArgs '''\
+            --build-arg UID=$(id -u) \
+            --build-arg GID=$(id -g) \
+            '''
+        }
+    }
+
+    options {
+        disableConcurrentBuilds()
+    }
+
+    triggers {
+        pollSCM ''
+    }
+
+    parameters {
+        booleanParam \
+            name: 'Clean',
+            description: 'Clean the workspace and perform a full rebuild'
+    }
+
+    environment {
+        BUILDROOT_SRC = "${env.WORKSPACE}/buildroot"
+    }
+
+    stages {
+        stage('Prepare') {
+            steps {
+                script {
+                    if (params.Clean) {
+                        sh 'rm -rf _build'
+                    }
+                }
+                checkout poll: false, scm: [
+                    $class: 'GitSCM',
+                    branches: [[name: '2022.02.x']],
+                    doGenerateSubmoduleConfigurations: false,
+                    userRemoteConfigs: [[url: 'git://git.buildroot.net/buildroot']],
+                    extensions: [
+                        [
+                            $class: 'RelativeTargetDirectory',
+                            relativeTargetDir: 'buildroot',
+                        ],
+                    ],
+                ]
+                sh '. ci/prepare.sh'
+            }
+        }
+
+        stage('Build') {
+            parallel {
+                stage('Build Initramfs') {
+                    steps {
+                        sh '. ci/build-initramfs.sh'
+                    }
+                }
+
+                stage('Build Rootfs') {
+                    steps {
+                        sh '. ci/build-rootfs.sh'
+                    }
+                }
+            }
+        }
+
+        stage('Publish') {
+            steps {
+                sshagent(['jenkins-pxe']) {
+                    sh '. ci/publish.sh'
+                }
+            }
+        }
+    }
+}

ci/build-initramfs.sh

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+#!/bin/sh
+
+make initramfs

ci/build-rootfs.sh

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+#!/bin/sh
+
+make rootfs

ci/prepare.sh

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+#!/bin/sh

ci/publish.sh

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+#!/bin/sh
+
+make publish