Make commands classes instead of objects (#946)

Making these classes caused native-image to statically initialize
them at build time, which included CLI argument default values
(like working dir).

This turns them back into classes.

Co-authored-by: Islon Scherer <islonscherer@gmail.com>

pkl-cli/src/main/kotlin/org/pkl/cli/Main.kt

@@ -22,5 +22,5 @@ import org.pkl.commons.cli.cliMain
 
 /** Main method of the Pkl CLI (command-line evaluator and REPL). */
 internal fun main(args: Array<String>) {
-  cliMain { RootCommand.main(args) }
+  cliMain { RootCommand().main(args) }
 }

pkl-cli/src/main/kotlin/org/pkl/cli/commands/AnalyzeCommand.kt

@@ -25,7 +25,7 @@ import org.pkl.cli.CliImportAnalyzerOptions
 import org.pkl.commons.cli.commands.ModulesCommand
 import org.pkl.commons.cli.commands.single
 
-object AnalyzeCommand :
+class AnalyzeCommand :
   NoOpCliktCommand(
     name = "analyze",
     help = "Commands related to static analysis",

pkl-cli/src/main/kotlin/org/pkl/cli/commands/DownloadPackageCommand.kt

@@ -27,7 +27,7 @@ import org.pkl.commons.cli.commands.ProjectOptions
 import org.pkl.commons.cli.commands.single
 import org.pkl.core.packages.PackageUri
 
-object DownloadPackageCommand :
+class DownloadPackageCommand :
   BaseCommand(
     name = "download-package",
     helpLink = helpLink,

pkl-cli/src/main/kotlin/org/pkl/cli/commands/EvalCommand.kt

@@ -24,7 +24,7 @@ import org.pkl.cli.CliEvaluatorOptions
 import org.pkl.commons.cli.commands.ModulesCommand
 import org.pkl.commons.cli.commands.single
 
-object EvalCommand :
+class EvalCommand :
   ModulesCommand(name = "eval", help = "Render pkl module(s)", helpLink = helpLink) {
   private val outputPath: String? by
     option(

pkl-cli/src/main/kotlin/org/pkl/cli/commands/ProjectCommand.kt

@@ -33,18 +33,18 @@ import org.pkl.commons.cli.commands.single
 
 private const val NEWLINE = '\u0085'
 
-object ProjectCommand :
+class ProjectCommand :
   NoOpCliktCommand(
     name = "project",
     help = "Run commands related to projects",
     epilog = "For more information, visit $helpLink",
   ) {
   init {
-    subcommands(ResolveCommand, PackageCommand)
+    subcommands(ResolveCommand(), PackageCommand())
   }
 }
 
-object ResolveCommand :
+class ResolveCommand :
   BaseCommand(
     name = "resolve",
     helpLink = helpLink,
@@ -74,7 +74,7 @@ object ResolveCommand :
   }
 }
 
-object PackageCommand :
+class PackageCommand :
   BaseCommand(
     name = "package",
     helpLink = helpLink,

pkl-cli/src/main/kotlin/org/pkl/cli/commands/ReplCommand.kt

@@ -21,8 +21,7 @@ import org.pkl.cli.CliRepl
 import org.pkl.commons.cli.commands.BaseCommand
 import org.pkl.commons.cli.commands.ProjectOptions
 
-object ReplCommand :
-  BaseCommand(name = "repl", help = "Start a REPL session", helpLink = helpLink) {
+class ReplCommand : BaseCommand(name = "repl", help = "Start a REPL session", helpLink = helpLink) {
   private val projectOptions by ProjectOptions()
 
   override fun run() {

pkl-cli/src/main/kotlin/org/pkl/cli/commands/RootCommand.kt

@@ -23,7 +23,7 @@ import org.pkl.core.Release
 
 internal val helpLink = "${Release.current().documentation.homepage}pkl-cli/index.html#usage"
 
-object RootCommand :
+class RootCommand :
   NoOpCliktCommand(
     name = "pkl",
     printHelpOnEmptyArgs = true,
@@ -41,13 +41,13 @@ object RootCommand :
     }
 
     subcommands(
-      EvalCommand,
-      ReplCommand,
-      ServerCommand,
-      TestCommand,
-      ProjectCommand,
-      DownloadPackageCommand,
-      AnalyzeCommand,
+      EvalCommand(),
+      ReplCommand(),
+      ServerCommand(),
+      TestCommand(),
+      ProjectCommand(),
+      DownloadPackageCommand(),
+      AnalyzeCommand(),
     )
   }
 }

pkl-cli/src/main/kotlin/org/pkl/cli/commands/ServerCommand.kt

@@ -19,7 +19,7 @@ import com.github.ajalt.clikt.core.CliktCommand
 import org.pkl.cli.CliServer
 import org.pkl.commons.cli.CliBaseOptions
 
-object ServerCommand :
+class ServerCommand :
   CliktCommand(
     name = "server",
     help = "Run as a server that communicates over standard input/output",

pkl-cli/src/main/kotlin/org/pkl/cli/commands/TestCommand.kt

@@ -26,7 +26,7 @@ import org.pkl.commons.cli.commands.BaseOptions
 import org.pkl.commons.cli.commands.ProjectOptions
 import org.pkl.commons.cli.commands.TestOptions
 
-object TestCommand :
+class TestCommand :
   BaseCommand(name = "test", help = "Run tests within the given module(s)", helpLink = helpLink) {
   val modules: List<URI> by
     argument(name = "<modules>", help = "Module paths or URIs to evaluate.")

pkl-cli/src/test/kotlin/org/pkl/cli/CliMainTest.kt

@@ -32,28 +32,28 @@ import org.pkl.commons.writeString
 import org.pkl.core.Release
 
 class CliMainTest {
+  private val rootCmd = RootCommand()
 
   @Test
   fun `duplicate CLI option produces meaningful error message`(@TempDir tempDir: Path) {
     val inputFile = tempDir.resolve("test.pkl").writeString("").toString()
 
     assertThatCode {
-        RootCommand.parse(
+        rootCmd.parse(
           arrayOf("eval", "--output-path", "path1", "--output-path", "path2", inputFile)
         )
       }
       .hasMessage("Invalid value for \"--output-path\": Option cannot be repeated")
 
     assertThatCode {
-        RootCommand.parse(arrayOf("eval", "-o", "path1", "--output-path", "path2", inputFile))
+        rootCmd.parse(arrayOf("eval", "-o", "path1", "--output-path", "path2", inputFile))
       }
       .hasMessage("Invalid value for \"--output-path\": Option cannot be repeated")
   }
 
   @Test
   fun `eval requires at least one file`() {
-    assertThatCode { RootCommand.parse(arrayOf("eval")) }
-      .hasMessage("""Missing argument "<modules>"""")
+    assertThatCode { rootCmd.parse(arrayOf("eval")) }.hasMessage("""Missing argument "<modules>"""")
   }
 
   // Can't reliably create symlinks on Windows.
@@ -74,7 +74,7 @@ class CliMainTest {
     val inputFile = tempDir.resolve("test.pkl").writeString(code).toString()
     val outputFile = makeSymdir(tempDir, "out", "linkOut").resolve("test.pkl").toString()
 
-    assertThatCode { RootCommand.parse(arrayOf("eval", inputFile, "-o", outputFile)) }
+    assertThatCode { rootCmd.parse(arrayOf("eval", inputFile, "-o", outputFile)) }
       .doesNotThrowAnyException()
   }
 
@@ -85,24 +85,24 @@ class CliMainTest {
     val error =
       """Invalid value for "--multiple-file-output-path": Option is mutually exclusive with -o, --output-path and -x, --expression."""
 
-    assertThatCode { RootCommand.parse(arrayOf("eval", "-m", testOut, "-x", "x", testIn)) }
+    assertThatCode { rootCmd.parse(arrayOf("eval", "-m", testOut, "-x", "x", testIn)) }
       .hasMessage(error)
 
-    assertThatCode { RootCommand.parse(arrayOf("eval", "-m", testOut, "-o", "/tmp/test", testIn)) }
+    assertThatCode { rootCmd.parse(arrayOf("eval", "-m", testOut, "-o", "/tmp/test", testIn)) }
       .hasMessage(error)
   }
 
   @Test
   fun `showing version works`() {
-    assertThatCode { RootCommand.parse(arrayOf("--version")) }
-      .hasMessage(Release.current().versionInfo)
+    assertThatCode { rootCmd.parse(arrayOf("--version")) }.hasMessage(Release.current().versionInfo)
   }
 
   @Test
   fun `file paths get parsed into URIs`(@TempDir tempDir: Path) {
-    RootCommand.parse(arrayOf("eval", makeInput(tempDir, "my file.txt")))
+    val cmd = RootCommand()
+    cmd.parse(arrayOf("eval", makeInput(tempDir, "my file.txt")))
 
-    val evalCmd = RootCommand.registeredSubcommands().filterIsInstance<EvalCommand>().first()
+    val evalCmd = cmd.registeredSubcommands().filterIsInstance<EvalCommand>().first()
     val modules = evalCmd.baseOptions.baseOptions(evalCmd.modules).normalizedSourceModules
     assertThat(modules).hasSize(1)
     assertThat(modules[0].path).endsWith("my file.txt")
@@ -110,8 +110,7 @@ class CliMainTest {
 
   @Test
   fun `invalid URIs are not accepted`() {
-    val ex =
-      assertThrows<BadParameterValue> { RootCommand.parse(arrayOf("eval", "file:my file.txt")) }
+    val ex = assertThrows<BadParameterValue> { rootCmd.parse(arrayOf("eval", "file:my file.txt")) }
 
     assertThat(ex.message).contains("URI `file:my file.txt` has invalid syntax")
   }

pkl-cli/src/test/kotlin/org/pkl/cli/CliTestRunnerTest.kt

@@ -388,7 +388,7 @@ class CliTestRunnerTest {
   @Test
   fun `no source modules specified has same message as pkl eval`() {
     val e1 = assertThrows<CliException> { CliTestRunner(CliBaseOptions(), CliTestOptions()).run() }
-    val e2 = assertThrows<MissingArgument> { RootCommand.parse(listOf("eval")) }
+    val e2 = assertThrows<MissingArgument> { RootCommand().parse(listOf("eval")) }
     assertThat(e1).hasMessageContaining("Missing argument \"<modules>\"")
     assertThat(e1.message!!.replace("test", "eval")).isEqualTo(e2.helpMessage())
   }

pkl-doc/src/main/kotlin/org/pkl/doc/Main.kt

@@ -34,10 +34,10 @@ import org.pkl.core.Release
 
 /** Main method for the Pkldoc CLI. */
 internal fun main(args: Array<String>) {
-  cliMain { DocCommand.main(args) }
+  cliMain { DocCommand().main(args) }
 }
 
-object DocCommand :
+class DocCommand :
   BaseCommand(name = "pkldoc", helpLink = Release.current().documentation().homepage()) {
 
   private val modules: List<URI> by

pkl-doc/src/test/kotlin/org/pkl/doc/CliMainTest.kt

@@ -23,7 +23,8 @@ import org.pkl.commons.cli.CliException
 class CliMainTest {
   @Test
   fun `CLI run test`() {
-    val e = assertThrows<CliException> { DocCommand.parse(arrayOf("foo", "--output-dir", "/tmp")) }
+    val e =
+      assertThrows<CliException> { DocCommand().parse(arrayOf("foo", "--output-dir", "/tmp")) }
     assertThat(e)
       .hasMessageContaining("must contain at least one module named `doc-package-info.pkl`")
   }