Skip unsupported arguments in command

VIM-2720

src/test/java/org/jetbrains/plugins/ideavim/ex/implementation/commands/CmdCommandTest.kt

@@ -19,6 +19,7 @@
 package org.jetbrains.plugins.ideavim.ex.implementation.commands
 
 import com.maddyhome.idea.vim.VimPlugin
+import com.maddyhome.idea.vim.api.injector
 import org.jetbrains.plugins.ideavim.VimTestCase
 
 /**
@@ -130,6 +131,22 @@ class CmdCommandTest : VimTestCase() {
     assertPluginError(false)
   }
 
+  fun `test add command with range`() {
+    VimPlugin.getCommand().resetAliases()
+    configureByText("\n")
+    typeText(commandToKeys("command! -range Error echo <args>"))
+    assertPluginError(false)
+    assertEquals("'-range' is not supported by `command`", injector.messages.getStatusBarMessage())
+  }
+
+  fun `test add command with complete`() {
+    VimPlugin.getCommand().resetAliases()
+    configureByText("\n")
+    typeText(commandToKeys("command! -complete=color Error echo <args>"))
+    assertPluginError(false)
+    assertEquals("'-complete' is not supported by `command`", injector.messages.getStatusBarMessage())
+  }
+
   fun `test add command with arguments short`() {
     VimPlugin.getCommand().resetAliases()
     configureByText("\n")

vim-engine/src/main/kotlin/com/maddyhome/idea/vim/vimscript/model/commands/CmdCommand.kt

@@ -35,6 +35,18 @@ import com.maddyhome.idea.vim.vimscript.model.ExecutionResult
 data class CmdCommand(val ranges: Ranges, val argument: String) : Command.SingleExecution(ranges) {
   override val argFlags = flags(RangeFlag.RANGE_FORBIDDEN, ArgumentFlag.ARGUMENT_OPTIONAL, Access.READ_ONLY)
 
+  private val unsupportedArgs = listOf(
+    Regex("-range(=[^ ])?") to "-range",
+    Regex("-complete=[^ ]*") to "-complete",
+    Regex("-count=[^ ]*") to "-count",
+    Regex("-addr=[^ ]*") to "-addr",
+    Regex("-bang") to "-bang",
+    Regex("-bar") to "-bar",
+    Regex("-register") to "-register",
+    Regex("-buffer") to "-buffer",
+    Regex("-keepscript") to "-keepscript",
+  )
+
   // Static definitions needed for aliases.
   private companion object {
     const val overridePrefix = "!"
@@ -76,6 +88,14 @@ data class CmdCommand(val ranges: Ranges, val argument: String) : Command.Single
       argument = argument.removePrefix(overridePrefix).trim()
     }
 
+    for ((arg, message) in unsupportedArgs) {
+      val match = arg.find(argument)
+      match?.range?.let {
+        argument = argument.removeRange(it)
+        injector.messages.showStatusBarMessage("'$message' is not supported by `command`")
+      }
+    }
+
     // Handle alias arguments
     val hasArguments = argument.startsWith(argsPrefix)
     var minNumberOfArgs = 0