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.
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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__/.

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MOS_MIGRATED_REVID=120224534

1 files changed, 3 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/SkylarkRuleImplementationFunctions.java b/src/main/java/com/google/devtools/build/lib/rules/SkylarkRuleImplementationFunctions.java
index a0e00ff62d..44f637f3e7 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/SkylarkRuleImplementationFunctions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/SkylarkRuleImplementationFunctions.java
@@ -563,7 +563,9 @@ public class SkylarkRuleImplementationFunctions {
         Boolean collectData, Boolean collectDefault,
         SkylarkDict<?, ?> symlinks, SkylarkDict<?, ?> rootSymlinks,
         Location loc) throws EvalException, ConversionException {
-      Runfiles.Builder builder = new Runfiles.Builder(ctx.getRuleContext().getWorkspaceName());
+      Runfiles.Builder builder = new Runfiles.Builder(
+          ctx.getRuleContext().getWorkspaceName(),
+          ctx.getConfiguration().legacyExternalRunfiles());
       boolean checkConflicts = false;
       if (EvalUtils.toBoolean(collectData)) {
         builder.addRunfiles(ctx.getRuleContext(), RunfilesProvider.DATA_RUNFILES);