fix(isthmus-cli): use correct version in Isthmus CLI help (#456)

fixes #223

Signed-off-by: Niels Pardon <[email protected]>

Author: nielspardon

isthmus-cli/build.gradle.kts

@@ -1,3 +1,5 @@
+import java.nio.charset.StandardCharsets
+
 plugins {
   id("java")
   id("idea")
@@ -49,6 +51,8 @@ dependencies {
   runtimeOnly("org.slf4j:slf4j-jdk14:${SLF4J_VERSION}")
 }
 
+sourceSets { main { java.srcDir("build/generated/sources/version/") } }
+
 val initializeAtBuildTime =
   listOf(
       "com.google.common.base.Platform",
@@ -143,3 +147,30 @@ graal {
   option("--features=io.substrait.isthmus.cli.RegisterAtRuntime")
   option("-J--enable-preview")
 }
+
+tasks.register("writeIsthmusVersion") {
+  doLast {
+    val isthmusVersionClass =
+      layout.buildDirectory
+        .file("generated/sources/version/io/substrait/isthmus/cli/IsthmusCliVersion.java")
+        .get()
+        .getAsFile()
+    isthmusVersionClass.getParentFile().mkdirs()
+
+    isthmusVersionClass.printWriter(StandardCharsets.UTF_8).use {
+      it.println("package io.substrait.isthmus.cli;\n")
+      it.println("import io.substrait.SubstraitVersion;")
+      it.println("import picocli.CommandLine.IVersionProvider;\n")
+      it.println("public class IsthmusCliVersion implements IVersionProvider {")
+      it.println("  public String[] getVersion() throws Exception {")
+      it.println("    return new String[] {")
+      it.println("        \"\${COMMAND-NAME} version " + project.version + "\",")
+      it.println("        \"Substrait version \" + SubstraitVersion.VERSION,")
+      it.println("};")
+      it.println("  }")
+      it.println("}")
+    }
+  }
+}
+
+tasks.named("compileJava") { dependsOn("writeIsthmusVersion") }

isthmus-cli/src/main/java/io/substrait/isthmus/cli/IsthmusEntryPoint.java

@@ -1,9 +1,5 @@
 package io.substrait.isthmus.cli;
 
-import static picocli.CommandLine.Command;
-import static picocli.CommandLine.Option;
-import static picocli.CommandLine.Parameters;
-
 import com.google.common.annotations.VisibleForTesting;
 import com.google.protobuf.Message;
 import com.google.protobuf.TextFormat;
@@ -22,10 +18,13 @@
 import org.apache.calcite.avatica.util.Casing;
 import org.apache.calcite.prepare.Prepare;
 import picocli.CommandLine;
+import picocli.CommandLine.Command;
+import picocli.CommandLine.Option;
+import picocli.CommandLine.Parameters;
 
 @Command(
     name = "isthmus",
-    version = "isthmus 0.1",
+    versionProvider = io.substrait.isthmus.cli.IsthmusCliVersion.class,
     description = "Convert SQL Queries and SQL Expressions to Substrait",
     mixinStandardHelpOptions = true)
 public class IsthmusEntryPoint implements Callable<Integer> {