ci: Add Jenkins build pipeline

We'll build and publish `tmpl` with a container image, to make it easier
for other container images to include it.

.containerignore

@@ -0,0 +1,4 @@
+*
+!src
+!Cargo.toml
+!Cargo.lock

Containerfile

@@ -0,0 +1,25 @@
+FROM registry.fedoraproject.org/fedora-minimal:39 AS build
+
+RUN --mount=type=cache,target=/var/cache \
+    microdnf install -y \
+        --setopt install_weak_deps=0 \
+        cargo\
+    && :
+
+COPY . /src
+
+WORKDIR /src
+
+RUN cargo build --release --locked
+
+
+FROM registry.fedoraproject.org/fedora-minimal:39
+
+COPY --from=build /src/target/release/tmpl /usr/local/bin
+
+ENTRYPOINT ["/usr/local/bin/tmpl"]
+
+LABEL name='tmpl' \
+    vendor='Dustin C. Hatch' \
+    license='MIT OR APACHE-2.0' \
+    version='0.1.0'

ci/Jenkinsfile

@@ -0,0 +1,64 @@
+pipeline {
+    agent none
+
+    stages {
+        stage('tmpl') {
+            matrix {
+                axes {
+                    axis {
+                        name 'ARCH'
+                        values 'amd64', 'arm64'
+                    }
+                }
+
+                stages {
+                    stage('tmpl') {
+                        agent {
+                            kubernetes {
+                                yamlFile 'podTemplate.yaml'
+                                yamlMergeStrategy merge()
+                                defaultContainer 'build'
+                                nodeSelector "kubernetes.io/arch=${ARCH}"
+                            }
+                        }
+                        stages {
+                            stage {
+                                stage('Build') {
+                                    steps {
+                                        sh '. ci/build.sh'
+                                    }
+                                    post {
+                                        success {
+                                            archiveArtifacts "${ARCH}/*"
+                                        }
+                                    }
+                                }
+
+                                stage('Publish') {
+                                    env {
+                                        REGISTRY_AUTH_FILE = "${env.WORKSPACE_TMP}/auth.json"
+                                    }
+                                    steps {
+                                        withCredentials([usernamePassword(
+                                            credentialsId: 'jenkins-packages',
+                                            usernameVariable: 'BUILDAH_USERNAME',
+                                            passwordVariable: 'BUILDAH_PASSWORD',
+                                        )]) {
+                                            sh """
+                                                buildah login \
+                                                --username \${BUILDAH_USERNAME} \
+                                                --password \${BUILDAH_PASSWORD} \
+                                                git.pyrocufflink.net
+                                            """
+                                        }
+                                        sh '. ci/publish.sh'
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

ci/build.sh

@@ -0,0 +1,7 @@
+. ci/common.sh
+
+buildah push "${IMAGE_NAME}:${TAG}"
+buildah push "${IMAGE_NAME}:${TAG}" "${IMAGE_NAME}:${TAG}-${BUILD_NUMBER}"
+if [ ${BRANCH_NAME} = master ]; then
+    buildah push "${IMAGE_NAME}:${TAG}" "${IMAGE_NAME}:latest"
+fi

ci/common.sh

@@ -0,0 +1,13 @@
+escape_name() {
+    echo "$1" \
+        | tr A-Z a-z \
+        | sed -e 's/[^a-zA-Z0-9._-]/-/g' -e 's/^[.-]/_/'
+}
+
+REGISTRY_URL=git.pyrocufflink.net
+NAMESPACE=containerimages
+NAME="${JOB_NAME#*/}"
+NAME=$(escape_name "${NAME%/*}")
+TAG=$(escape_name "${BRANCH_NAME}")
+
+IMAGE_NAME="${REGISTRY_URL}/${NAMESPACE}/${NAME}"

ci/publish.sh

@@ -0,0 +1,3 @@
+. ci/common.sh
+
+buildah build -t "${IMAGE_NAME}:${TAG}" .

src/main.rs

@@ -303,14 +303,11 @@ fn checksum(path: impl AsRef<Path>) -> std::io::Result<Vec<u8>> {
     let mut blake = Blake2b512::new();
     loop {
         let mut buf = vec![0u8; 16384];
-        match f.read_exact(&mut buf) {
-            Ok(_) => blake.update(buf),
-            Err(e) if e.kind() == std::io::ErrorKind::UnexpectedEof => {
-                blake.update(buf);
-                break;
-            }
-            Err(e) => return Err(e),
+        let sz = f.read(&mut buf)?;
+        if sz == 0 {
+            break;
         }
+        blake.update(&buf[..sz]);
     }
     Ok(blake.finalize().to_vec())
 }