reformat code

.gitattributes

@@ -0,0 +1,6 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# These are explicitly windows files and should use crlf
+*.bat           text eol=crlf
+

.gitignore

@@ -0,0 +1,10 @@
+target
+docs/_build
+.idea
+*.iml
+*.DS_Store
+.gradle
+.gradletasknamecache
+build/
+rpm/
+rpmbuild/

Makefile

@@ -1,3 +1,20 @@
+##
+# Copyright (C) 2020 Aiven Oy
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+##
+
 short_ver = $(shell git describe --abbrev=0 2>/dev/null || echo 0.0.1)
 long_ver = $(shell git describe --long 2>/dev/null || echo $(short_ver)-0-unknown-g`git describe --always`)
 
@@ -8,15 +25,16 @@ SOURCES := \
 	src/main/java/io/aiven/kafka/connect/s3/AivenKafkaConnectS3OutputStream.java \
 	src/main/java/io/aiven/kafka/connect/s3/AivenKafkaConnectS3SinkConnector.java \
 	src/main/java/io/aiven/kafka/connect/s3/AivenKafkaConnectS3SinkTask.java \
-	pom.xml \
+	build.gradle \
+	gradle/ \
+	gradlew \
 	aiven-kafka-connect-s3.spec
 
 all: rpm
 
 build-dep:
 	sudo dnf install -y --allowerasing --best \
-	   java-1.8.0-openjdk-devel \
-	   maven
+	   rpm-build java-1.8.0-openjdk-devel
 
 clean:
 	$(RM) -r rpm/ rpmbuild/
@@ -33,4 +51,4 @@ rpm: $(SOURCES)
 	cp "$(CURDIR)/rpmbuild/RPMS/noarch"/*.rpm "$@/"
 
 test:
-	mvn -Dmodule_version=0.0.1 test
+	./gradlew -Pmodule_version=0.0.1 test

aiven-kafka-connect-s3.spec

@@ -7,7 +7,7 @@ License: Apache (v2)
 URL: https://aiven.io/
 Source0: aiven-kafka-connect-s3-src.tar
 BuildArch: noarch
-BuildRequires: java, maven
+BuildRequires: java
 Requires: java
 Packager: Heikki Nousiainen <[email protected]>
 
@@ -18,11 +18,11 @@ Aiven Kafka Connect S3 Connector
 %setup
 
 %build
-mvn -Dmodule_version=%{major_version} package
+./gradlew -Pmodule_version=%{major_version} clean build
 
 %install
 %{__mkdir_p} %{buildroot}/opt/aiven-kafka/libs
-install target/aiven-kafka-connect-s3-%{version}.jar %{buildroot}/opt/aiven-kafka/libs/aiven-kafka-connect-s3-%{version}.jar
+install build/libs/aiven-kafka-connect-s3-%{version}.jar %{buildroot}/opt/aiven-kafka/libs/aiven-kafka-connect-s3-%{version}.jar
 
 %files
 /opt/aiven-kafka/libs/aiven-kafka-connect-s3-%{version}.jar

build.gradle

@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2020 Aiven Oy
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+plugins {
+
+    // https://docs.gradle.org/current/userguide/java_library_plugin.html
+    id "java-library"
+
+    // https://docs.gradle.org/current/userguide/checkstyle_plugin.html
+    id "checkstyle"
+
+    // https://docs.gradle.org/current/userguide/jacoco_plugin.html
+    id "jacoco"
+
+    // https://docs.gradle.org/current/userguide/distribution_plugin.html
+    id "distribution"
+
+    // https://docs.gradle.org/current/userguide/publishing_maven.html
+    id "maven-publish"
+
+}
+
+group = "io.aiven"
+version = hasProperty("module_version") ? "$project.module_version" : 'unknown'
+
+repositories {
+    jcenter()
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+checkstyle {
+    toolVersion "8.29"
+    configDir rootProject.file("checkstyle/")
+}
+
+jacoco {
+    toolVersion = "0.8.5"
+}
+
+ext {
+    kafkaVersion = "0.11.0.1"
+    amazonS3Version = "1.11.718"
+    slf4jVersion = "1.7.25"
+}
+
+distributions {
+    main {
+        contents {
+            from jar
+            from configurations.runtimeClasspath
+
+            into("/") {
+                from projectDir
+                include "version.txt", "README*", "LICENSE*", "NOTICE*", "licenses/"
+                include "config/"
+            }
+        }
+    }
+}
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            // Defaults, for clarity
+            groupId = getGroup()
+            artifactId = getName()
+            version = getVersion()
+
+            pom {
+                name = "Aiven Kafka S3 connector"
+                description = "A Kafka S3 sink connector for copying data from Kafka to S3."
+                url = "https://aiven.io"
+                organization {
+                    name = "Aiven Oy"
+                    url = "https://aiven.io"
+                }
+                licenses {
+                    license {
+                        name = "GNU Affero General Public License 3.0"
+                        url = "https://www.gnu.org/licenses/agpl-3.0.en.html"
+                        distribution = "repo"
+                    }
+                }
+                scm {
+                    connection = "scm:git:git://github.com/aiven/aiven-kafka-connect-s3.git"
+                    developerConnection = "scm:git:[email protected]:aiven/aiven-kafka-connect-s3.git"
+                    url = "https://github.com/aiven/aiven-kafka-connect-s3.git"
+                    tag = "HEAD"
+                }
+            }
+        }
+    }
+}
+
+processResources {
+    filesMatching('aiven-kafka-connect-s3-version.properties') {
+        expand(version: version)
+    }
+}
+
+dependencies {
+    compileOnly "org.apache.kafka:connect-api:$kafkaVersion"
+    compileOnly "org.apache.kafka:connect-runtime:$kafkaVersion"
+
+    implementation "org.slf4j:slf4j-api:$slf4jVersion"
+    implementation "com.amazonaws:aws-java-sdk-s3:$amazonS3Version"
+
+    runtimeOnly "org.slf4j:slf4j-log4j12:$slf4jVersion"
+
+    compileOnly "org.apache.kafka:connect-api:$kafkaVersion"
+    compileOnly "org.apache.kafka:connect-runtime:$kafkaVersion"
+    compileOnly "org.slf4j:slf4j-api:$slf4jVersion"
+
+    testImplementation "org.apache.kafka:connect-api:$kafkaVersion"
+    testImplementation "org.apache.kafka:connect-runtime:$kafkaVersion"
+    testImplementation "org.slf4j:slf4j-simple:$slf4jVersion"
+    testImplementation 'junit:junit:4.12'
+    testImplementation 'io.findify:s3mock_2.11:0.2.3'
+}