Open source test project generation utils

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MOS_MIGRATED_REVID=108070691

1 files changed, 188 insertions, 0 deletions

diff --git a/src/test/java/com/google/devtools/build/lib/generatedprojecttest/util/RuleSetUtils.java b/src/test/java/com/google/devtools/build/lib/generatedprojecttest/util/RuleSetUtils.java
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index 0000000000..a9dbbc8aa8
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@@ -0,0 +1,188 @@
+// Copyright 2015 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.generatedprojecttest.util;
+
+import com.google.common.base.Predicate;
+import com.google.common.base.Predicates;
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Iterables;
+import com.google.common.collect.Iterators;
+import com.google.common.collect.Lists;
+import com.google.devtools.build.lib.packages.Attribute;
+import com.google.devtools.build.lib.packages.BuildType;
+import com.google.devtools.build.lib.packages.RuleClass;
+import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType;
+import com.google.devtools.build.lib.syntax.Type;
+import com.google.devtools.build.lib.util.Pair;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Utility class for providing static predicates for rules, to help filter the rules.
+ */
+public class RuleSetUtils {
+
+  /**
+   * Predicate for checking if a rule is hidden.
+   */
+  public static final Predicate<String> HIDDEN_RULE = new Predicate<String>() {
+    @Override
+    public boolean apply(final String input) {
+      try {
+        RuleClassType.INVISIBLE.checkName(input);
+        return true;
+      } catch (IllegalArgumentException e) {
+        return input.equals("testing_dummy_rule");
+      }
+    }
+  };
+
+  /**
+   * Predicate for checking if a rule has any mandatory attributes.
+   */
+  public static final Predicate<RuleClass> MANDATORY_ATTRIBUTES = new Predicate<RuleClass>() {
+    @Override
+    public boolean apply(final RuleClass input) {
+      List<Attribute> li = new ArrayList<>(input.getAttributes());
+      return Iterables.any(li, MANDATORY);
+    }
+  };
+
+  /**
+   * Predicate for checking if a rule allows an empty srcs attribute.
+   */
+  public static final Predicate<RuleClass> EMPTY_SOURCES_ALLOWED = new Predicate<RuleClass>() {
+    @Override
+    public boolean apply(final RuleClass input) {
+      return !input.getAttributeByName("srcs").isNonEmpty();
+    }
+  };
+
+  /**
+   * Predicate for checking that the rule can have a deps attribute, and does not have any
+   * other mandatory attributes besides deps.
+   */
+  public static final Predicate<RuleClass> DEPS_ONLY_ALLOWED = new Predicate<RuleClass>() {
+    @Override
+    public boolean apply(final RuleClass input) {
+      List<Attribute> li = new ArrayList<>(input.getAttributes());
+      // TODO(bazel-team): after the API migration we shouldn't check srcs separately
+      boolean emptySrcsAllowed = input.hasAttr("srcs", BuildType.LABEL_LIST)
+          ? !input.getAttributeByName("srcs").isNonEmpty() : true;
+      if (!(emptySrcsAllowed && Iterables.any(li, DEPS))) {
+        return false;
+      }
+
+      Iterator<Attribute> it = li.iterator();
+      boolean mandatoryAttributesBesidesDeps =
+          Iterables.any(Lists.newArrayList(Iterators.filter(it, MANDATORY)), Predicates.not(DEPS));
+      return !mandatoryAttributesBesidesDeps;
+    }
+  };
+
+  /**
+   * Predicate for checking if a RuleClass has certain attributes
+   */
+  public static class HasAttributes implements Predicate<RuleClass> {
+
+    private static enum Operator {
+      ANY, ALL
+    }
+
+    private final List<Pair<String, Type<?>>> attributes;
+    private final Operator operator;
+
+    public HasAttributes(Collection<Pair<String, Type<?>>> attributes, Operator operator) {
+      this.attributes = ImmutableList.copyOf(attributes);
+      this.operator = operator;
+    }
+
+    @Override
+    public boolean apply(final RuleClass input) {
+      switch (operator) {
+        case ANY:
+          for (Pair<String, Type<?>> attribute : attributes) {
+            if (input.hasAttr(attribute.first, attribute.second)) {
+              return true;
+            }
+          }
+          return false;
+        case ALL:
+          for (Pair<String, Type<?>> attribute : attributes) {
+            if (!input.hasAttr(attribute.first, attribute.second)) {
+              return false;
+            }
+          }
+          return true;
+      }
+      return false;
+    }
+  }
+
+  public static final Predicate<RuleClass> hasAnyAttributes(
+      Collection<Pair<String, Type<?>>> attributes) {
+    return new HasAttributes(attributes, HasAttributes.Operator.ANY);
+  }
+
+  public static final Predicate<RuleClass> hasAllAttributes(
+      Collection<Pair<String, Type<?>>> attributes) {
+    return new HasAttributes(attributes, HasAttributes.Operator.ALL);
+  }
+
+  /**
+   * Predicate for checking if an attribute is mandatory.
+   */
+  private static final Predicate<Attribute> MANDATORY = new Predicate<Attribute>() {
+    @Override
+    public boolean apply(final Attribute input) {
+      return input.isMandatory();
+    }
+  };
+
+  /**
+   * Predicate for checking if an attribute is the "deps" attribute.
+   */
+  private static final Predicate<Attribute> DEPS = new Predicate<Attribute>() {
+    @Override
+    public boolean apply(final Attribute input) {
+      return input.getName().equals("deps");
+    }
+  };
+
+  /**
+   * Predicate for checking if all the strings in a list of strings are different.
+   */
+  public static final Predicate<List<String>> ELEMENTS_ALL_DIFFERENT =
+      new Predicate<List<String>>() {
+    @Override
+    public boolean apply(final List<String> input) {
+      Set<String> inputAsSet = new HashSet<>(input);
+      return input.size() == inputAsSet.size();
+    }
+  };
+
+  /**
+   * Predicate for checking if a rule class is not in excluded.
+   */
+  public static Predicate<String> notContainsAnyOf(final ImmutableSet<String> excluded) {
+    return Predicates.not(Predicates.in(excluded));
+  }
+}