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, 4 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/genrule/GenRule.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/genrule/GenRule.java
index 119eb7838c..1448aee2ce 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/genrule/GenRule.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/genrule/GenRule.java
@@ -149,7 +149,10 @@ public class GenRule implements RuleConfiguredTargetFactory {
         // No need to visit the dependencies of a genrule. They cross from the target into the host
         // configuration, because the dependencies of a genrule are always built for the host
         // configuration.
-        new Runfiles.Builder(ruleContext.getWorkspaceName()).addTransitiveArtifacts(filesToBuild)
+        new Runfiles.Builder(
+            ruleContext.getWorkspaceName(),
+            ruleContext.getConfiguration().legacyExternalRunfiles())
+            .addTransitiveArtifacts(filesToBuild)
             .build());
 
     return new RuleConfiguredTargetBuilder(ruleContext)