diff options
author | ulfjack <ulfjack@google.com> | 2017-08-08 19:45:46 +0200 |
---|---|---|
committer | Marcel Hlopko <hlopko@google.com> | 2017-08-09 11:33:29 +0200 |
commit | 3562525a795b41c6e69cab5afdb1c92a48528f7d (patch) | |
tree | 2dd13ea748b6a4516cefa165524cf04442ecf9e8 /src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java | |
parent | 91a4d98ec7ed723fdbfd6f35b85bedafee907884 (diff) |
Move the Skylark rule infrastructure from lib.rules to lib.analysis.skylark
This is part of splitting up the build-base library into separate libraries for
analysis, exec, and rules. Unfortunately, there are a number of reverse deps
from analysis code to Skylark classes, so moving these is the only way to make
progress.
PiperOrigin-RevId: 164612957
Diffstat (limited to 'src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java')
-rw-r--r-- | src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java b/src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java new file mode 100644 index 0000000000..153f7beb61 --- /dev/null +++ b/src/main/java/com/google/devtools/build/lib/analysis/skylark/SkylarkApiProvider.java @@ -0,0 +1,43 @@ +// Copyright 2014 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.lib.analysis.skylark; + +import com.google.devtools.build.lib.analysis.TransitiveInfoCollection; +import com.google.devtools.build.lib.util.Preconditions; + +/** + * An abstract class for adding a Skylark API for the native providers. + * Derived classes should declare functions to be used from Skylark. + */ +public abstract class SkylarkApiProvider { + private TransitiveInfoCollection info; + + protected TransitiveInfoCollection getInfo() { + return info; + } + + public final void init(TransitiveInfoCollection info) { + if (this.info != null) { + // todo(dslomov): nuke this weird initialization mechanism. + + // Allow multiple calls. + // It is possible for the Skylark rule to get a SkylarkApiProvider such as `target.java` + // from its dependency and pass it on. It does not make a whole lot of sense, but we + // shouldn't crash. + return; + } + this.info = Preconditions.checkNotNull(info); + } +} |