1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/sh/ShBinary.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/sh/ShBinary.java
new file mode 100644
index 0000000000..4e6ba814a3
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/sh/ShBinary.java
@@ -0,0 +1,82 @@
+// Copyright 2014 Google Inc. 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.bazel.rules.sh;
+
+import com.google.common.collect.ImmutableList;
+import com.google.devtools.build.lib.actions.Artifact;
+import com.google.devtools.build.lib.analysis.ConfiguredTarget;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTarget.Mode;
+import com.google.devtools.build.lib.analysis.RuleConfiguredTargetBuilder;
+import com.google.devtools.build.lib.analysis.RuleContext;
+import com.google.devtools.build.lib.analysis.Runfiles;
+import com.google.devtools.build.lib.analysis.RunfilesProvider;
+import com.google.devtools.build.lib.analysis.RunfilesSupport;
+import com.google.devtools.build.lib.analysis.actions.ExecutableSymlinkAction;
+import com.google.devtools.build.lib.collect.nestedset.NestedSet;
+import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder;
+import com.google.devtools.build.lib.rules.RuleConfiguredTargetFactory;
+
+/**
+ * Implementation for the sh_binary rule.
+ */
+public class ShBinary implements RuleConfiguredTargetFactory {
+
+  @Override
+  public ConfiguredTarget create(RuleContext ruleContext) {
+    ImmutableList<Artifact> srcs = ruleContext.getPrerequisiteArtifacts("srcs", Mode.TARGET).list();
+    if (srcs.size() != 1) {
+      ruleContext.attributeError("srcs", "you must specify exactly one file in 'srcs'");
+      return null;
+    }
+
+    Artifact symlink = ruleContext.createOutputArtifact();
+    Artifact src = srcs.get(0);
+    Artifact executableScript = getExecutableScript(ruleContext, src);
+    // The interpretation of this deceptively simple yet incredibly generic rule is complicated
+    // by the distinction between targets and (not properly encapsulated) artifacts. It depends
+    // on the notion of other rule's "files-to-build" sets, which are undocumented, making it
+    // impossible to give a precise definition of what this rule does in all cases (e.g. what
+    // happens when srcs = ['x', 'y'] but 'x' is an empty filegroup?). This is a pervasive
+    // problem in Blaze.
+    ruleContext.registerAction(
+        new ExecutableSymlinkAction(ruleContext.getActionOwner(), executableScript, symlink));
+
+    NestedSet<Artifact> filesToBuild = NestedSetBuilder.<Artifact>stableOrder()
+        .add(src)
+        .add(executableScript) // May be the same as src, in which case set semantics apply.
+        .add(symlink)
+        .build();
+    Runfiles runfiles = new Runfiles.Builder()
+        .addTransitiveArtifacts(filesToBuild)
+        .addRunfiles(ruleContext, RunfilesProvider.DEFAULT_RUNFILES)
+        .build();
+    RunfilesSupport runfilesSupport = RunfilesSupport.withExecutable(
+        ruleContext, runfiles, symlink);
+    return new RuleConfiguredTargetBuilder(ruleContext)
+        .setFilesToBuild(filesToBuild)
+        .setRunfilesSupport(runfilesSupport, symlink)
+        .addProvider(RunfilesProvider.class, RunfilesProvider.simple(runfiles))
+        .build();
+  }
+
+  /**
+   * Hook for sh_test to provide the executable.
+   *
+   * @param ruleContext
+   * @param src
+   */
+  protected Artifact getExecutableScript(RuleContext ruleContext, Artifact src) {
+    return src;
+  }
+}