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, 6 insertions, 3 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/python/PyBinary.java b/src/main/java/com/google/devtools/build/lib/rules/python/PyBinary.java
index ae048a0a03..f4e68f26d5 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/python/PyBinary.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/python/PyBinary.java
@@ -75,7 +75,8 @@ public abstract class PyBinary implements RuleConfiguredTargetFactory {
     semantics.createExecutable(ruleContext, common, ccLinkParamsStore, imports);
     Runfiles commonRunfiles = collectCommonRunfiles(ruleContext, common, semantics);
 
-    Runfiles.Builder defaultRunfilesBuilder = new Runfiles.Builder(ruleContext.getWorkspaceName())
+    Runfiles.Builder defaultRunfilesBuilder = new Runfiles.Builder(
+        ruleContext.getWorkspaceName(), ruleContext.getConfiguration().legacyExternalRunfiles())
         .merge(commonRunfiles);
     semantics.collectDefaultRunfilesForBinary(ruleContext, defaultRunfilesBuilder);
     Runfiles defaultRunfiles = defaultRunfilesBuilder.build();
@@ -90,7 +91,8 @@ public abstract class PyBinary implements RuleConfiguredTargetFactory {
     // Only include common runfiles and middleman. Default runfiles added by semantics are
     // excluded. The middleman is necessary to ensure the runfiles trees are generated for all
     // dependency binaries.
-    Runfiles dataRunfiles = new Runfiles.Builder(ruleContext.getWorkspaceName())
+    Runfiles dataRunfiles = new Runfiles.Builder(
+        ruleContext.getWorkspaceName(), ruleContext.getConfiguration().legacyExternalRunfiles())
         .merge(commonRunfiles)
         .addArtifact(runfilesSupport.getRunfilesMiddleman())
         .build();
@@ -112,7 +114,8 @@ public abstract class PyBinary implements RuleConfiguredTargetFactory {
 
   private static Runfiles collectCommonRunfiles(RuleContext ruleContext, PyCommon common,
       PythonSemantics semantics) {
-    Runfiles.Builder builder = new Runfiles.Builder(ruleContext.getWorkspaceName());
+    Runfiles.Builder builder = new Runfiles.Builder(
+        ruleContext.getWorkspaceName(), ruleContext.getConfiguration().legacyExternalRunfiles());
     builder.addArtifact(common.getExecutable());
     if (common.getConvertedFiles() != null) {
       builder.addSymlinks(common.getConvertedFiles());