remove hack of ignoring the scripts dir

.github/workflows/validation.yml

@@ -13,12 +13,11 @@ jobs:
         with:
           jvm: temurin:21
       - run: scala-cli format --check .
-      - run: scala-cli format --check scripts/
   license-check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: VirtusLab/scala-cli-setup@main
         with:
           jvm: temurin:21
-      - run: scala-cli run scripts/updateLicense.scala
+      - run: ./scripts/updateLicense.sc

project.scala

@@ -20,8 +20,6 @@
 //> using dep dev.zio::izumi-reflect:2.3.10
 //> using test.dep org.scalameta::munit:1.0.2
 
-//> using exclude scripts/
-
 //> using javaProp distcompiler.Node.assertErrorRefCorrectness=no
 
 // discarded flags: -Yrequire-targetName

scripts/updateLicense.sc

@@ -0,0 +1,92 @@
+#!/usr/bin/env -S scala-cli shebang
+// Copyright 2024 DCal Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//> using dep com.lihaoyi::os-lib:0.11.3
+import scala.util.matching.Regex
+import java.time.LocalDate
+import java.time.format.DateTimeFormatter
+
+final case class Options(
+    check: Boolean = true
+)
+
+val shouldRewrite =
+  args match
+    case Array("rewrite")           => true
+    case Array("dry-run") | Array() => false
+    case _ =>
+      println(
+        s"unrecognized command-line arguments: ${args.map(arg => s"`$arg`").mkString(", ")}"
+      )
+      System.exit(1)
+      false
+
+val licenseTemplate =
+  """ Copyright ____ DCal Team
+    |
+    | Licensed under the Apache License, Version 2.0 (the "License");
+    | you may not use this file except in compliance with the License.
+    | You may obtain a copy of the License at
+    |
+    |     http://www.apache.org/licenses/LICENSE-2.0
+    |
+    | Unless required by applicable law or agreed to in writing, software
+    | distributed under the License is distributed on an "AS IS" BASIS,
+    | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    | See the License for the specific language governing permissions and
+    | limitations under the License.""".stripMargin.linesIterator
+    .map(line => s"//$line")
+    .mkString(System.lineSeparator())
+
+val yearString = LocalDate.now().format(DateTimeFormatter.ofPattern("yyyy"))
+val licenseText = licenseTemplate.replace("____", yearString)
+val licenseRegex = Regex(
+  raw"""(?s)// Copyright \d\d\d\d.*// limitations under the License\."""
+)
+val licenseReplacement = Regex.quoteReplacement(licenseText)
+
+var checkFailed = false
+
+os.walk(os.pwd)
+  .iterator
+  .filterNot(_.segments.exists(_.startsWith(".")))
+  .filter(_.last.endsWith(".scala"))
+  .foreach: sourceFile =>
+    val contents = os.read(sourceFile)
+
+    val modifiedContents =
+      licenseRegex.findFirstIn(contents) match
+        case None =>
+          licenseText
+            ++ System.lineSeparator()
+            ++ System.lineSeparator()
+            ++ contents
+        case Some(str) =>
+          licenseRegex.replaceFirstIn(contents, licenseReplacement)
+
+    if shouldRewrite
+    then os.write.over(sourceFile, modifiedContents)
+    else if contents != modifiedContents
+    then
+      checkFailed = true
+      println(s"license needs updating in $sourceFile")
+
+if shouldRewrite
+then println("all changes made.")
+else if checkFailed
+then
+  println("check failed. TODO: update license info")
+  System.exit(1)
+else println("check ok, all licenses up to date.")