From 790d2f6009d47fe92cf0cd92a1473bbf0141f32e Mon Sep 17 00:00:00 2001
From: Kristina Chodorow <kchodorow@google.com>
Date: Thu, 21 Apr 2016 14:48:24 +0000
Subject: Make source manifest caching catch external runfile changes

--
MOS_MIGRATED_REVID=120442698
---
 .../devtools/build/lib/analysis/Runfiles.java      |  4 +++
 .../build/lib/analysis/SourceManifestAction.java   |  3 +-
 src/test/shell/bazel/runfiles_test.sh              | 39 ++++++++++++++++++++++
 3 files changed, 45 insertions(+), 1 deletion(-)

diff --git a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
index c52eabc5f9..f1c9b4f7f7 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/Runfiles.java
@@ -94,6 +94,10 @@ public final class Runfiles {
         }
       };
 
+  boolean getLegacyExternalRunfiles() {
+    return legacyRepositoryStructure;
+  }
+
   /**
    * An entry in the runfiles map.
    *
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/SourceManifestAction.java b/src/main/java/com/google/devtools/build/lib/analysis/SourceManifestAction.java
index 513fdc4e21..0c45b89d25 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/SourceManifestAction.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/SourceManifestAction.java
@@ -192,6 +192,7 @@ public final class SourceManifestAction extends AbstractFileWriteAction {
   protected String computeKey() {
     Fingerprint f = new Fingerprint();
     f.addString(GUID);
+    f.addBoolean(runfiles.getLegacyExternalRunfiles());
     Map<PathFragment, Artifact> symlinks = runfiles.getSymlinksAsMap();
     f.addInt(symlinks.size());
     for (Map.Entry<PathFragment, Artifact> symlink : symlinks.entrySet()) {
@@ -219,7 +220,7 @@ public final class SourceManifestAction extends AbstractFileWriteAction {
   /**
    * Supported manifest writing strategies.
    */
-  public static enum ManifestType implements ManifestWriter {
+  public enum ManifestType implements ManifestWriter {
 
     /**
      * Writes each line as:
diff --git a/src/test/shell/bazel/runfiles_test.sh b/src/test/shell/bazel/runfiles_test.sh
index 33205b86d2..698f319d59 100755
--- a/src/test/shell/bazel/runfiles_test.sh
+++ b/src/test/shell/bazel/runfiles_test.sh
@@ -53,4 +53,43 @@ EOF
   [[ -x bazel-bin/foo/foo.runfiles/$name/foo/foo ]] || fail "No foo executable under $name"
 }
 
+function test_external_runfiles() {
+  cat > WORKSPACE <<EOF
+workspace(name = "foo")
+
+new_local_repository(
+    name = "bar",
+    path = ".",
+    build_file = "BUILD",
+)
+EOF
+
+  cat > BUILD <<EOF
+exports_files(glob(["*"]))
+
+cc_binary(
+    name = "thing",
+    srcs = ["thing.cc"],
+    data = ["@bar//:thing.cc"],
+)
+EOF
+  cat > thing.cc <<EOF
+int main() { return 0; }
+EOF
+  bazel build --legacy_external_runfiles //:thing &> $TEST_log \
+    || fail "Build failed"
+  [[ -d bazel-bin/thing.runfiles/foo/external/bar ]] \
+    || fail "bar not found"
+
+  bazel build --nolegacy_external_runfiles //:thing &> $TEST_log \
+    || fail "Build failed"
+  [[ ! -d bazel-bin/thing.runfiles/foo/external/bar ]] \
+    || fail "Old bar still found"
+
+  bazel build --legacy_external_runfiles //:thing &> $TEST_log \
+    || fail "Build failed"
+  [[ -d bazel-bin/thing.runfiles/foo/external/bar ]] \
+    || fail "bar not recreated"
+}
+
 run_suite "runfiles tests"
-- 
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