remote: Add support for Google Cloud Storage.

Add support for Google Cloud Storage (GCS) as a HTTP caching backend.
This commit mainly adds the infrastructure necessary to authenticate
to GCS.

Using GCS as a caching backend works as follows:
  1) Create a new GCS bucket.
  2) Create a service account that can read and write to the GCS bucket
     and generate a JSON credentials file for it.
  3) Invoke Bazel as follows:
    bazel build
      --remote_rest_cache=https://storage.googleapis.com/<bucket>;
      --auth_enabled
      --auth_scope=https://www.googleapis.com/auth/devstorage.read_write
      --auth_credentials=</path/to/creds.json>

I'll add simplification's and docs in a subsequent commit.

Change-Id: Ie827d7946a2193b97ea7d9aa72eb15f09de2164d
PiperOrigin-RevId: 179406380

2 files changed, 7 insertions, 6 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteCacheTest.java b/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteCacheTest.java
index d2c8d287c4..76a992ab16 100644
--- a/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteCacheTest.java
+++ b/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteCacheTest.java
@@ -28,7 +28,7 @@ import com.google.bytestream.ByteStreamProto.WriteResponse;
 import com.google.common.collect.ImmutableList;
 import com.google.devtools.build.lib.actions.ActionInputHelper;
 import com.google.devtools.build.lib.authandtls.AuthAndTLSOptions;
-import com.google.devtools.build.lib.authandtls.GrpcUtils;
+import com.google.devtools.build.lib.authandtls.GoogleAuthUtils;
 import com.google.devtools.build.lib.clock.JavaClock;
 import com.google.devtools.build.lib.remote.DigestUtil.ActionKey;
 import com.google.devtools.build.lib.testutil.Scratch;
@@ -148,9 +148,10 @@ public class GrpcRemoteCacheTest {
     Scratch scratch = new Scratch();
     scratch.file(authTlsOptions.authCredentials, new JacksonFactory().toString(json));
 
-    CallCredentials creds = GrpcUtils.newCallCredentials(
-        scratch.resolve(authTlsOptions.authCredentials).getInputStream(),
-        authTlsOptions.authScope);
+    CallCredentials creds =
+        GoogleAuthUtils.newCallCredentials(
+            scratch.resolve(authTlsOptions.authCredentials).getInputStream(),
+            authTlsOptions.authScope);
     RemoteOptions remoteOptions = Options.getDefaults(RemoteOptions.class);
     RemoteRetrier retrier =
         new RemoteRetrier(
diff --git a/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteExecutionClientTest.java b/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteExecutionClientTest.java
index b6fcd830df..a19485005b 100644
--- a/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteExecutionClientTest.java
+++ b/src/test/java/com/google/devtools/build/lib/remote/GrpcRemoteExecutionClientTest.java
@@ -37,7 +37,7 @@ import com.google.devtools.build.lib.actions.SimpleSpawn;
 import com.google.devtools.build.lib.actions.SpawnResult;
 import com.google.devtools.build.lib.analysis.BlazeVersionInfo;
 import com.google.devtools.build.lib.authandtls.AuthAndTLSOptions;
-import com.google.devtools.build.lib.authandtls.GrpcUtils;
+import com.google.devtools.build.lib.authandtls.GoogleAuthUtils;
 import com.google.devtools.build.lib.clock.JavaClock;
 import com.google.devtools.build.lib.exec.SpawnExecException;
 import com.google.devtools.build.lib.exec.SpawnInputExpander;
@@ -238,7 +238,7 @@ public class GrpcRemoteExecutionClientTest {
     GrpcRemoteExecutor executor =
         new GrpcRemoteExecutor(channel, null, options.remoteTimeout, retrier);
     CallCredentials creds =
-        GrpcUtils.newCallCredentials(Options.getDefaults(AuthAndTLSOptions.class));
+        GoogleAuthUtils.newCallCredentials(Options.getDefaults(AuthAndTLSOptions.class));
     GrpcRemoteCache remoteCache =
         new GrpcRemoteCache(channel, creds, options, retrier, DIGEST_UTIL);
     client =