wip: ci: Begin Jenkins pipeline

ci/Jenkinsfile

@@ -0,0 +1,54 @@
+pipeline {
+    parameters {
+        booleanParam 'CLEAN_BUILD'
+    }
+
+    options {
+        disableConcurrentBuilds()
+    }
+
+    agent {
+        kubernetes {
+            yamlFile 'ci/podTemplate.yaml'
+            yamlMergeStrategy merge()
+            workspaceVolume persistentVolumeClaimWorkspaceVolume(
+                claimName: 'buildroot-airplaypi'
+            )
+            defaultContainer 'build'
+        }
+    }
+
+    environment {
+        BR2_CCACHE_DIR = '/home/jenkins/agent/br2-ccache'
+    }
+
+    stages {
+        stage('Clean') {
+            when {
+                expression {
+                    return params.CLEAN_BUILD
+                }
+            }
+            steps {
+                sh 'git clean -fdx'
+            }
+        }
+        stage('Build') {
+            steps {
+                sh 'make config'
+                sh 'make all BR2_CCACHE_DIR=${BR2_CCACHE_DIR}'
+            }
+            post {
+                success {
+                    dir('_build/images') {
+                        archiveArtifacts([
+                            'firmware.img',
+                            'rootfs.squashfs',
+                            'sdcard.img',
+                        ].join(','))
+                    }
+                }
+            }
+        }
+    }
+}

ci/podTemplate.yaml

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+spec:
+  containers:
+  - name: build
+    image: git.pyrocufflink.net/containerimages/buildroot
+    resources:
+      limits: &resources
+        cpu: 6
+        memory: 12Gi
+      requests: *resources
+    volumeMounts:
+    - mountPath: /etc/ssh/ssh_known_hosts
+      name: ssh-known-hosts
+      subPath: ssh_known_hosts
+  volumes:
+  - name: ssh-known-hosts
+    configMap:
+      name: ssh-known-hosts