Add initial implementation for running SBT commands.

testing/gen-languages-all

@@ -6,7 +6,7 @@ import sys
 LANGUAGES = (
     'conda', 'coursier', 'dart', 'docker', 'docker_image', 'dotnet', 'fail',
     'golang', 'lua', 'node', 'perl', 'pygrep', 'python', 'r', 'ruby', 'rust',
-    'script', 'swift', 'system',
+    'sbt', 'script', 'swift', 'system',
 )
 FIELDS = (
     'ENVIRONMENT_DIR', 'get_default_version', 'health_check',

testing/resources/sbt_hooks_repo/.pre-commit-hooks.yaml

@@ -0,0 +1,6 @@
+-   id: sbt-create-files
+    name: touch
+    entry: touch
+    args: ["file1.txt", "\"file2 with space.txt\""]
+    description: "creates files provided by `args` or `files`"
+    language: sbt

testing/resources/sbt_repo_with_touch_command/build.sbt

@@ -0,0 +1,6 @@
+import TouchCommand._
+
+lazy val root = (project in file("."))
+  .settings(
+    commands ++= Seq(touchCommand)
+  )

testing/resources/sbt_repo_with_touch_command/project/TouchCommand.scala

@@ -0,0 +1,13 @@
+import sbt.Command
+
+import java.nio.file.{Files, Paths}
+
+object TouchCommand {
+  def touchCommand = Command.args("touch", "args") { (state, args) =>
+    args.map(Paths.get(_).toAbsolutePath).foreach { path =>
+      println(f"Creating file: $path")
+      Files.createFile(path)
+    }
+    state
+  }
+}

testing/util.py

@@ -54,6 +54,10 @@ skipif_cant_run_lua = pytest.mark.skipif(
     os.name == 'nt',
     reason="lua isn't installed or can't be found",
 )
+skipif_cant_run_sbt = pytest.mark.skipif(
+    parse_shebang.find_executable('sbt') is None,
+    reason="SBT isn't installed or can't be found",
+)
 skipif_cant_run_swift = pytest.mark.skipif(
     parse_shebang.find_executable('swift') is None,
     reason="swift isn't installed or can't be found",