feat(Release): Enable command-line releases (#108)

* Update release docs
* Add minification
* Print the path to the command-line app JAR

RELEASE.md

@@ -1,14 +1,34 @@
 # Release instructions
 
-To create a release jar file, we use the IntelliJ artifact build feature
+We create releases from the command-line using the [shadow Gradle plugin](https://github.com/johnrengelman/shadow), which creates a JAR file including all necessary dependencies.
 
-- Go to File->Project Structure
-- Select Artifacts in the left pane
-- Add a new one by clicking the '+' button
-  - of type JAR->From modules with dependencies
-- Select the Main class from cli-app module
-- Place the META-INF file at the project's root
-- In the output Layout, add both cli-app and in-memory-simple modules main resource directory content
+### 1. Prepare for release
+Change `version` in the various `build.gradle` files to remove the `-SNAPSHOT` qualifier. 
+
+For example, if the current version is `1.1.0-SNAPSHOT`, change the `version` to `1.1.0`. 
+
+### 2. Do the release
+
+```
+./gradlew shadowJar
+```
+
+The command line output will tell you where the compiled JAR file is located - for example:
+
+>Successfully built the gtfs-validator command-line app: C:\git-projects\gtfs-validator\application\cli-app\build\libs\gtfs-validator-v1.1.0.jar
+
+This file can then be run from the command-line with the normal Java conventions:
+
+```
+java -jar gtfs-validator-v1.1.0.jar -u https://transitfeeds.com/p/mbta/64/latest/download -z input.zip -i input -o output
+```
+
+### 3. Prepare for the next development cycle
+
+Increment the `version` in the various `build.gradle` files and add the `-SNAPSHOT` qualifier. 
+
+For example, if the version you just released is `1.1.0`, change the `version` to `1.1.1-SNAPSHOT`.
+
+For more details on versioning, see [Understanding Maven Version Numbers](https://docs.oracle.com/middleware/1212/core/MAVEN/maven_version.htm#MAVEN8855).
 
-- Build the jar through Build->Build Artifacts
 

adapter/exporter/build.gradle

@@ -36,7 +36,7 @@ dependencies {
 
     implementation 'com.google.protobuf:protobuf-java:3.8.0'
 
-    implementation 'com.fasterxml.jackson.core:jackson-core:2.10.1'
+    implementation 'com.fasterxml.jackson.core:jackson-core:2.10.3'
 
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.5.2'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.5.2'

adapter/repository/in-memory-simple/build.gradle

@@ -43,9 +43,9 @@ dependencies {
 
     implementation 'commons-validator:commons-validator:1.6'
 
-    implementation 'com.fasterxml.jackson.core:jackson-core:2.10.1'
-    implementation 'com.fasterxml.jackson.core:jackson-databind:2.10.1'
-    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.10.1'
+    implementation 'com.fasterxml.jackson.core:jackson-core:2.10.3'
+    implementation 'com.fasterxml.jackson.core:jackson-databind:2.10.3'
+    implementation 'com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.10.3'
 
     implementation 'org.apache.logging.log4j:log4j-api:2.12.1'
     implementation 'org.apache.logging.log4j:log4j-core:2.12.1'

application/cli-app/build.gradle

@@ -13,14 +13,40 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import org.gradle.internal.logging.text.StyledTextOutputFactory
+import org.gradle.internal.logging.text.StyledTextOutput
 
 plugins {
+    id 'com.github.johnrengelman.shadow' version '5.2.0'
     id 'java'
 }
 
 group 'org.mobilitydata'
 version '1.1.0-SNAPSHOT'
 
+jar {
+    // Add the manifest within the JAR, using gtfs-validator as the title
+    manifest {
+        attributes('Implementation-Title': rootProject.name,
+                'Implementation-Version': project.version,
+                'Main-Class': 'org.mobilitydata.gtfsvalidator.Main',
+                'Multi-Release': 'true')
+    }
+}
+
+shadowJar {
+    minimize {
+        exclude(dependency('org.apache.logging.log4j:log4j-core'))
+        exclude(dependency('com.fasterxml.jackson.core:jackson-databind'))
+    }
+    // Change the JAR name from cli-app to gtfs-validator
+    archiveBaseName = rootProject.name
+    // Remove "-all" from the end of the JAR file name
+    archiveClassifier = null
+    // Add "v" to version to match previous releases
+    archiveVersion = "v" + project.version
+}
+
 sourceCompatibility = JavaVersion.VERSION_11
 
 repositories {
@@ -39,3 +65,9 @@ dependencies {
     implementation 'org.apache.logging.log4j:log4j-core:2.12.1'
     testCompile group: 'junit', name: 'junit', version: '4.12'
 }
+
+// Print success message with location of compiled JAR with dependencies
+def out = services.get(StyledTextOutputFactory).create("output")
+tasks.shadowJar.doLast {
+    out.style(StyledTextOutput.Style.SuccessHeader).println "Successfully built the gtfs-validator command-line app: " + archivePath
+}