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, 3 insertions, 8 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
index 6d4fb51bef..cab180b1a5 100644
--- a/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
+++ b/src/test/java/com/google/devtools/build/lib/testutil/TestConstants.java
@@ -38,17 +38,12 @@ public class TestConstants {
    * Location in the bazel repo where embedded binaries come from.
    */
   public static final ImmutableList<String> EMBEDDED_SCRIPTS_PATHS = ImmutableList.of(
-      "src/main/tools");
-
-  /**
-   * Path within runfiles tree for finding everything else.
-   */
-  public static final String RUNFILES_PREFIX = "DOES-NOT-WORK-YET";
+      "io_bazel/src/main/tools");
 
   /**
    * Default workspace name.
    */
-  public static final String WORKSPACE_NAME = "";
+  public static final String WORKSPACE_NAME = "__main__";
 
   /**
    * Name of a class with an INSTANCE field of type AnalysisMock to be used for analysis tests.
@@ -59,7 +54,7 @@ public class TestConstants {
   /**
    * Directory where we can find bazel's Java tests, relative to a test's runfiles directory.
    */
-  public static final String JAVATESTS_ROOT = "src/test/java/";
+  public static final String JAVATESTS_ROOT = "io_bazel/src/test/java/";
 
   public static final String TEST_RULE_CLASS_PROVIDER =
       "com.google.devtools.build.lib.bazel.rules.BazelRuleClassProvider";