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/Jenkinsfile

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+pipeline {
+    agent {
+        docker {
+            image 'registry.fedoraproject.org/fedora'
+            args '--privileged -u 0:0'
+        }
+    }
+
+    stages {
+        stage('Prepare') {
+            steps {
+                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