Move the runfiles for external repositories to under the x.runfiles/ directory

This also sets the Bazel workspace name to io_bazel_source.

Fixes #848.

Relevant to #1116, #1124,

RELNOTES[INC]: All repositories are now directly under the x.runfiles directory in the runfiles tree (previously, external repositories were at x.runfiles/main-repo/external/other-repo. This simplifies handling remote repository runfiles considerably, but will break existing references to external repository runfiles.
---
Furthermore, if a Bazel project does not provide a workspace name in the WORKSPACE file, Bazel will now default to using __main__ as the workspace name (instead of "", as previously). The repository's runfiles will appear under x.runfiles/__main__/.

--
MOS_MIGRATED_REVID=120224534

1 files changed, 2 insertions, 2 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/packages/util/MockToolsConfig.java b/src/test/java/com/google/devtools/build/lib/packages/util/MockToolsConfig.java
index 6207fde742..8b57ff53dc 100644
--- a/src/test/java/com/google/devtools/build/lib/packages/util/MockToolsConfig.java
+++ b/src/test/java/com/google/devtools/build/lib/packages/util/MockToolsConfig.java
@@ -123,12 +123,12 @@ public final class MockToolsConfig {
    */
   public void linkTool(String relativePath, String dest) throws IOException {
     Preconditions.checkState(realFileSystem);
-    Path target = runfilesDirectory.getRelative(TestConstants.RUNFILES_PREFIX + "/" + relativePath);
+    Path target = runfilesDirectory.getRelative(TestConstants.WORKSPACE_NAME + "/" + relativePath);
     if (!target.exists()) {
       // In some cases we run tests in a special client with a ../READONLY/ path where we may also
       // find the runfiles. Try that, too.
       Path readOnlyClientPath = rootDirectory.getRelative(
-          "../READONLY/" + TestConstants.RUNFILES_PREFIX + "/" + relativePath);
+          "../READONLY/" + TestConstants.WORKSPACE_NAME + "/" + relativePath);
       if (!readOnlyClientPath.exists()) {
         throw new IOException("target does not exist " + target);
       } else {