Fix scripted test fixtures for sbt 2.x

CI on sbt 2.0.0 surfaced two sbt-1-isms in the test fixtures (keep-api-url
already passed; only all-libraries and jdk failed):

- all-libraries/test used the sbt 0.13 colon command syntax
  `+compile:doc::apiMappings`, which sbt 2.x rejects ("Expected ';'"). Switch to
  slash syntax `+Compile / doc / apiMappings`.
- jdk/build.sbt read `sLog.value` in its check/fgrep/jgrep tasks. On sbt 2.x a
  Logger has no `HashWriter`, so reading it as a task input breaks the default
  task caching ("given evidence sjsonnew.HashWriter[...Logger...] is not found").
  Use `println` for the diagnostic output instead — no task input needed. (The
  `Map[HashedVirtualFileRef, URI]` from apiMappings does have a HashWriter, as
  the passing keep-api-url test shows, so only the Logger was the problem.)

Both changes are also valid on sbt 1.x.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: Atry

src/sbt-test/sbt-api-mappings/all-libraries/test

@@ -1,5 +1,5 @@
-> +compile:doc::apiMappings
-> +test:doc::apiMappings
+> +Compile / doc / apiMappings
+> +Test / doc / apiMappings
 
 > check
 > +check

src/sbt-test/sbt-api-mappings/jdk/build.sbt

@@ -17,8 +17,8 @@ def isJava(x: Integer) = javaVersion match {
 
 check := {
 
-  val log = sLog.value
-
+  // Avoid `sLog.value`: on sbt 2.x a Logger has no HashWriter, so reading it as a
+  // task input breaks the default task caching. `println` needs no task input.
   val compileApiMappings = (Compile / doc / apiMappings).value
 
   val expect = "https://docs.oracle.com/(?:en/java/)?javase/\\d+/docs/api/".r
@@ -28,14 +28,14 @@ check := {
   }
 
   if (found) {
-    log.info("Found javadoc url in apiMappings")
+    println("Found javadoc url in apiMappings")
 
   } else {
-    log.info("Entries in apiMappings:")
+    println("Entries in apiMappings:")
     compileApiMappings.values
       .map("+ " + _.toString)
       .foreach(
-        log.info(_)
+        println(_)
       )
     sys.error(s"Failed to match ${expect}")
   }
@@ -46,12 +46,10 @@ val fgrep = InputKey[Unit]("fgrep")
 fgrep := {
   val args: Seq[String] = Def.spaceDelimited().parsed
 
-  val log = sLog.value
-
   val found = IO.readLines(file(args(1))).exists(_.contains(args(0)))
 
   if (found) {
-    log.info(s"Found '${args(0)}' in '${args(1)}'")
+    println(s"Found '${args(0)}' in '${args(1)}'")
 
   } else {
     sys.error(s"Failed to fgrep '${args(0)}' '${args(1)}'")
@@ -63,12 +61,10 @@ val jgrep = InputKey[Unit]("jgrep")
 jgrep := {
   val args: Seq[String] = Def.spaceDelimited().parsed
 
-  val log = sLog.value
-
   val found = IO.readLines(file(args(1))).exists(regexMatches(args(0).r)(_))
 
   if (found) {
-    log.info(s"Found '${args(0)}' in '${args(1)}'")
+    println(s"Found '${args(0)}' in '${args(1)}'")
 
   } else {
     sys.error(s"Failed to jgrep '${args(0)}' '${args(1)}'")