Fixed bootstrap tests (#1501)

We need to use the assembly instead of the script.
If we use the script, it will read the `.mill-version` file and run with the wrong version.

Fix an potential issue with non-existant paths in `ScalaModule.docJar` target.

Pull request: #1501

build.sc

@@ -858,7 +858,7 @@ object dev extends MillModule {
   override def assembly = T{
     val isWin = scala.util.Properties.isWin
     val millPath = T.ctx.dest / (if (isWin) "mill.bat" else "mill")
-    os.move(super.assembly().path, millPath)
+    os.copy(super.assembly().path, millPath)
     PathRef(millPath)
   }
 

ci/test-mill-bootstrap-0.sh

@@ -7,14 +7,14 @@ git stash -u
 git stash -a
 
 # First build
-./mill -i all __.publishLocal launcher
-cp out/launcher/dest/mill ~/mill-1
+./mill -i "{__.publishLocal,assembly}"
+cp out/assembly/dest/mill ~/mill-1
 
 # Clean up
 git stash -u
 git stash -a
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Differentiate first and second builds
 git config --global user.name "Your Name"
@@ -24,14 +24,14 @@ echo "Build 2" > info.txt && git add info.txt && git commit -m "Add info.txt"
 ci/patch-mill-bootstrap.sh
 
 # Second build
-~/mill-1 -i all __.publishLocal launcher
-cp out/launcher/dest/mill ~/mill-2
+~/mill-1 -i "{__.publishLocal,assembly}"
+cp out/assembly/dest/mill ~/mill-2
 
 # Clean up
 git stash -u
 git stash -a
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Patch local build
 ci/patch-mill-bootstrap.sh

ci/test-mill-bootstrap-1.sh

@@ -7,14 +7,14 @@ git stash -u
 git stash -a
 
 # First build
-./mill -i all __.publishLocal launcher
-cp out/launcher/dest/mill ~/mill-1
+./mill -i "{__.publishLocal,assembly}"
+cp out/assembly/dest/mill ~/mill-1
 
 # Clean up
 git stash -u
 git stash -a
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Differentiate first and second builds
 git config --global user.name "Your Name"
@@ -24,14 +24,14 @@ echo "Build 2" > info.txt && git add info.txt && git commit -m "Add info.txt"
 ci/patch-mill-bootstrap.sh
 
 # Second build
-~/mill-1 -i all __.publishLocal launcher
-cp out/launcher/dest/mill ~/mill-2
+~/mill-1 -i "{__.publishLocal,assembly}"
+cp out/assembly/dest/mill ~/mill-2
 
 # Clean up
 git stash -u
 git stash -a
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Patch local build
 ci/patch-mill-bootstrap.sh

ci/test-mill-dev.sh

@@ -9,7 +9,7 @@ git stash -a
 # Build Mill
 ./mill -i dev.assembly
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Patch local build
 ci/patch-mill-bootstrap.sh

ci/test-mill-release.sh

@@ -13,7 +13,7 @@ ci/publish-local.sh
 git stash -u
 git stash -a
 
-rm -rf ~/.mill
+rm -rf ~/.mill/ammonite
 
 # Patch local build
 ci/patch-mill-bootstrap.sh

scalalib/src/ScalaModule.scala

@@ -291,6 +291,7 @@ trait ScalaModule extends JavaModule { outer =>
         ),
         docSources()
           .map(_.path)
+          .filter(os.exists)
           .flatMap(os.walk(_))
           .filter(_.ext == "tasty")
           .map(_.toString),
@@ -304,6 +305,7 @@ trait ScalaModule extends JavaModule { outer =>
         Seq("-d", javadocDir.toNIO.toString),
         docSources()
           .map(_.path)
+          .filter(os.exists)
           .flatMap(os.walk(_))
           .filter(os.isFile)
           .map(_.toString),