feat: account for -build-tool:mill

Without this if you're using Mill and you don't pass in -build-tool:sbt
this will blow up because it doesn't recognize vf: as a uri scheme when
default is choses. This introduces a new UriScheme.ZINC that both Mill
and sbt can use since as far as I know, this is a Zinc abstraction not
an sbt one. I then deprecated the UriScheme.SBT

Author: ckipp01

semanticdb-javac/src/main/java/com/sourcegraph/semanticdb_javac/SemanticdbJavacOptions.java

@@ -55,8 +55,8 @@ public static SemanticdbJavacOptions parse(String[] args, Context ctx) {
         }
       } else if (arg.startsWith("-sourceroot:")) {
         result.sourceroot = Paths.get(arg.substring("-sourceroot:".length())).normalize();
-      } else if (arg.equals("-build-tool:sbt")) {
-        result.uriScheme = UriScheme.SBT;
+      } else if (arg.equals("-build-tool:sbt") || args.equals("-build-tool:mill")) {
+        result.uriScheme = UriScheme.ZINC;
       } else if (arg.equals("-build-tool:bazel")) {
         result.uriScheme = UriScheme.BAZEL;
         useJavacClassesDir = true;

semanticdb-javac/src/main/java/com/sourcegraph/semanticdb_javac/SemanticdbTaskListener.java

@@ -102,7 +102,7 @@ private void writeSemanticdb(TaskEvent event, Path output, Semanticdb.TextDocume
 
   public static Path absolutePathFromUri(SemanticdbJavacOptions options, JavaFileObject file) {
     URI uri = file.toUri();
-    if (options.uriScheme == UriScheme.SBT
+    if ((options.uriScheme == UriScheme.SBT || options.uriScheme == UriScheme.ZINC)
         && uri.getScheme().equals("vf")
         && uri.toString().startsWith("vf://tmp/")) {
       String[] parts = uri.toString().split("/", 5);

semanticdb-javac/src/main/java/com/sourcegraph/semanticdb_javac/UriScheme.java

@@ -2,6 +2,9 @@
 
 public enum UriScheme {
   DEFAULT,
+  /** @deprecated Use ZINC instead */
+  @Deprecated
   SBT,
-  BAZEL
+  BAZEL,
+  ZINC
 }