Implement imports (via load()) in Skydoc.

Skydoc will generate documentation for all rule definitions in the transitive dependencies of the given input file.

RELNOTES: None.
PiperOrigin-RevId: 202553088

1 files changed, 33 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/skydoc/FilesystemFileAccessor.java b/src/main/java/com/google/devtools/build/skydoc/FilesystemFileAccessor.java
new file mode 100644
index 0000000000..e9ad5f33d0
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/skydoc/FilesystemFileAccessor.java
@@ -0,0 +1,33 @@
+// Copyright 2018 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.devtools.build.skydoc;
+
+import com.google.devtools.build.lib.syntax.ParserInputSource;
+import com.google.devtools.build.lib.vfs.PathFragment;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+/**
+ * Implementation of {@link SkylarkFileAccessor} which uses the real filesystem.
+ */
+public class FilesystemFileAccessor implements SkylarkFileAccessor {
+
+  @Override
+  public ParserInputSource inputSource(String pathString) throws IOException {
+    byte[] content = Files.readAllBytes(Paths.get(pathString));
+    return ParserInputSource.create(content, PathFragment.create(pathString));
+  }
+}