Store content digests in repository marker files. https://www.bazel.build/designs/2016/10/18/repository-invalidation.html

Change-Id: I6cb01397a35cd32169a0e415f8d7f944e7d840df
PiperOrigin-RevId: 166200841

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/rules/repository/RepositoryFunctionTest.java b/src/test/java/com/google/devtools/build/lib/rules/repository/RepositoryFunctionTest.java
index d550924212..722067011e 100644
--- a/src/test/java/com/google/devtools/build/lib/rules/repository/RepositoryFunctionTest.java
+++ b/src/test/java/com/google/devtools/build/lib/rules/repository/RepositoryFunctionTest.java
@@ -17,13 +17,20 @@ package com.google.devtools.build.lib.rules.repository;
 import static com.google.common.truth.Truth.assertThat;
 
 import com.google.common.annotations.VisibleForTesting;
+import com.google.common.io.BaseEncoding;
 import com.google.devtools.build.lib.analysis.BlazeDirectories;
 import com.google.devtools.build.lib.analysis.RuleDefinition;
 import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
 import com.google.devtools.build.lib.packages.Rule;
+import com.google.devtools.build.lib.skyframe.FileContentsProxy;
+import com.google.devtools.build.lib.skyframe.FileStateValue;
+import com.google.devtools.build.lib.skyframe.FileStateValue.RegularFileStateValue;
+import com.google.devtools.build.lib.skyframe.FileValue;
+import com.google.devtools.build.lib.skyframe.FileValue.RegularFileValue;
 import com.google.devtools.build.lib.vfs.FileSystemUtils;
 import com.google.devtools.build.lib.vfs.Path;
 import com.google.devtools.build.lib.vfs.PathFragment;
+import com.google.devtools.build.lib.vfs.RootedPath;
 import com.google.devtools.build.skyframe.SkyFunction;
 import com.google.devtools.build.skyframe.SkyFunctionException;
 import java.util.Map;
@@ -112,4 +119,20 @@ public class RepositoryFunctionTest extends BuildViewTestCase {
     assertMarkerFileEscaping("a \\\nb");
     assertMarkerFileEscaping("a \nb");
   }
+
+  @Test
+  public void testFileValueToMarkerValue() throws Exception {
+    RootedPath path = RootedPath.toRootedPath(rootDirectory, scratch.file("foo", "bar"));
+
+    // Digest should be returned if the FileStateValue has it.
+    FileStateValue fsv = new RegularFileStateValue(3, 100, new byte[] {1, 2, 3, 4}, null);
+    FileValue fv = new RegularFileValue(path, fsv);
+    assertThat(RepositoryFunction.fileValueToMarkerValue(fv)).isEqualTo("01020304");
+
+    // Digest should also be returned if the FileStateValue doesn't have it.
+    fsv = new RegularFileStateValue(3, 100, null, new FileContentsProxy(100, 200));
+    fv = new RegularFileValue(path, fsv);
+    String expectedDigest = BaseEncoding.base16().lowerCase().encode(path.asPath().getDigest());
+    assertThat(RepositoryFunction.fileValueToMarkerValue(fv)).isEqualTo(expectedDigest);
+  }
 }