build libraries from source

Author: lihaoyi

project/Build.scala

@@ -727,19 +727,40 @@ object Build {
           "https://repo1.maven.org/maven2/com/lihaoyi/fansi_3/0.5.1/fansi_3-0.5.1-sources.jar",
           "https://repo1.maven.org/maven2/com/lihaoyi/sourcecode_3/0.4.3-M5/sourcecode_3-0.4.3-M5-sources.jar",
         )
-        val sourceManagedPath = os.Path((Compile / sourceManaged).value)
-        for(download <- downloads) os.unzip.stream(requests.get.stream(download), dest = sourceManagedPath)
-        for(file <- os.walk(sourceManagedPath) if file.ext == "scala") yield{
+        val sourceManagedPath = os.Path((Compile / sourceManaged).value / "downloaded")
+        os.remove.all(sourceManagedPath)
+        os.makeDir.all(sourceManagedPath)
+        for(download <- downloads) {
+          os.unzip.stream(requests.get.stream(download), dest = sourceManagedPath)
+        }
+        for {
+          file <- os.walk(sourceManagedPath)
+          if file.ext == "scala"
+          if file.last != "CollectionName.scala"
+        } yield {
           val text = os.read(file)
-          if (!text.contains("package scala")){
-            os.write.over(
-              file,
-              "package dotty.shaded\n" +
-                text
-                  .replace("_root_.pprint", "_root_.dotty.shaded.pprint")
-                  .replace("_root_.fansi", "_root_.dotty.shaded.fansi")
-            )
-          }
+          os.write.over(
+            file,
+            "package dotty.shaded\n" +
+              text
+                .replace("import scala", "import _root_.scala")
+                .replace(" scala.collection.", " _root_.scala.collection.")
+                .replace("_root_.pprint", "_root_.dotty.shaded.pprint")
+                .replace("_root_.fansi", "_root_.dotty.shaded.fansi")
+                .replace("def apply(c: Char): Trie[T]", "def apply(c: Char): Trie[T] | Null")
+                .replace("var head: Iterator[T] = null", "var head: Iterator[T] | Null = null")
+                .replace("if (head != null && head.hasNext) true", "if (head != null && head.nn.hasNext) true")
+                .replace("head.next()", "head.nn.next()")
+                .replace(
+                  "_root_.scala.collection.internal.pprint.CollectionName.get(i)",
+                  "import scala.reflect.Selectable.reflectiveSelectable\n" +
+                    "    i.asInstanceOf[{def collectionClassName: String}].collectionClassName"
+                )
+                .replace("abstract class Walker", "@scala.annotation.nowarn abstract class Walker")
+                .replace("object TPrintLowPri", "@scala.annotation.nowarn object TPrintLowPri")
+//                .replace("_root_.scala.collection.internal.pprint.CollectionName.get(i)", "head.nn.next()")
+//                .replace("_root_.scala.collection.internal.pprint.CollectionName.get(i)", "head.nn.next()")
+          )
           file.toIO
         }
       }.taskValue,