| // 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.rules; |
| |
| import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.DATA; |
| import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.HOST; |
| import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.NONE; |
| import static com.google.devtools.build.lib.packages.Attribute.attr; |
| import static com.google.devtools.build.lib.packages.BuildType.LABEL; |
| import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST; |
| import static com.google.devtools.build.lib.packages.BuildType.LICENSE; |
| import static com.google.devtools.build.lib.syntax.SkylarkType.castList; |
| import static com.google.devtools.build.lib.syntax.SkylarkType.castMap; |
| import static com.google.devtools.build.lib.syntax.Type.BOOLEAN; |
| import static com.google.devtools.build.lib.syntax.Type.INTEGER; |
| import static com.google.devtools.build.lib.syntax.Type.STRING; |
| import static com.google.devtools.build.lib.syntax.Type.STRING_LIST; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.devtools.build.lib.analysis.BaseRuleClasses; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.RunUnder; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.cmdline.LabelSyntaxException; |
| import com.google.devtools.build.lib.events.Location; |
| import com.google.devtools.build.lib.packages.Attribute; |
| import com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition; |
| import com.google.devtools.build.lib.packages.Attribute.LateBoundLabel; |
| import com.google.devtools.build.lib.packages.AttributeMap; |
| import com.google.devtools.build.lib.packages.ImplicitOutputsFunction.SkylarkImplicitOutputsFunctionWithCallback; |
| import com.google.devtools.build.lib.packages.ImplicitOutputsFunction.SkylarkImplicitOutputsFunctionWithMap; |
| import com.google.devtools.build.lib.packages.Package.NameConflictException; |
| import com.google.devtools.build.lib.packages.PackageFactory; |
| import com.google.devtools.build.lib.packages.PackageFactory.PackageContext; |
| import com.google.devtools.build.lib.packages.Rule; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| import com.google.devtools.build.lib.packages.RuleClass.Builder; |
| import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType; |
| import com.google.devtools.build.lib.packages.RuleFactory; |
| import com.google.devtools.build.lib.packages.RuleFactory.InvalidRuleException; |
| import com.google.devtools.build.lib.packages.TargetUtils; |
| import com.google.devtools.build.lib.packages.TestSize; |
| import com.google.devtools.build.lib.syntax.BaseFunction; |
| import com.google.devtools.build.lib.syntax.BuiltinFunction; |
| import com.google.devtools.build.lib.syntax.ClassObject; |
| import com.google.devtools.build.lib.syntax.ClassObject.SkylarkClassObject; |
| import com.google.devtools.build.lib.syntax.Environment; |
| import com.google.devtools.build.lib.syntax.Environment.NoSuchVariableException; |
| import com.google.devtools.build.lib.syntax.EvalException; |
| import com.google.devtools.build.lib.syntax.EvalUtils; |
| import com.google.devtools.build.lib.syntax.FuncallExpression; |
| import com.google.devtools.build.lib.syntax.FunctionSignature; |
| import com.google.devtools.build.lib.syntax.Runtime; |
| import com.google.devtools.build.lib.syntax.SkylarkCallbackFunction; |
| import com.google.devtools.build.lib.syntax.SkylarkList; |
| import com.google.devtools.build.lib.syntax.SkylarkModuleNameResolver; |
| import com.google.devtools.build.lib.syntax.SkylarkSignature; |
| import com.google.devtools.build.lib.syntax.SkylarkSignature.Param; |
| import com.google.devtools.build.lib.syntax.SkylarkSignatureProcessor; |
| import com.google.devtools.build.lib.syntax.Type; |
| import com.google.devtools.build.lib.syntax.Type.ConversionException; |
| import com.google.devtools.build.lib.vfs.PathFragment; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.ExecutionException; |
| |
| /** |
| * A helper class to provide an easier API for Skylark rule definitions. |
| */ |
| public class SkylarkRuleClassFunctions { |
| |
| //TODO(bazel-team): proper enum support |
| @SkylarkSignature(name = "DATA_CFG", returnType = ConfigurationTransition.class, |
| doc = "Experimental. Specifies a transition to the data configuration.") |
| private static final Object dataTransition = ConfigurationTransition.DATA; |
| |
| @SkylarkSignature(name = "HOST_CFG", returnType = ConfigurationTransition.class, |
| doc = "Specifies a transition to the host configuration.") |
| private static final Object hostTransition = ConfigurationTransition.HOST; |
| |
| private static final LateBoundLabel<BuildConfiguration> RUN_UNDER = |
| new LateBoundLabel<BuildConfiguration>() { |
| @Override |
| public Label getDefault(Rule rule, BuildConfiguration configuration) { |
| RunUnder runUnder = configuration.getRunUnder(); |
| return runUnder == null ? null : runUnder.getLabel(); |
| } |
| }; |
| |
| // TODO(bazel-team): Copied from ConfiguredRuleClassProvider for the transition from built-in |
| // rules to skylark extensions. Using the same instance would require a large refactoring. |
| // If we don't want to support old built-in rules and Skylark simultaneously |
| // (except for transition phase) it's probably OK. |
| private static LoadingCache<String, Label> labelCache = |
| CacheBuilder.newBuilder().build(new CacheLoader<String, Label>() { |
| @Override |
| public Label load(String from) throws Exception { |
| try { |
| return Label.parseAbsolute(from); |
| } catch (LabelSyntaxException e) { |
| throw new Exception(from); |
| } |
| } |
| }); |
| |
| // TODO(bazel-team): Remove the code duplication (BaseRuleClasses and this class). |
| /** Parent rule class for non-executable non-test Skylark rules. */ |
| public static final RuleClass baseRule = |
| BaseRuleClasses.commonCoreAndSkylarkAttributes( |
| new RuleClass.Builder("$base_rule", RuleClassType.ABSTRACT, true)) |
| .add(attr("expect_failure", STRING)) |
| .build(); |
| |
| /** Parent rule class for executable non-test Skylark rules. */ |
| public static final RuleClass binaryBaseRule = |
| new RuleClass.Builder("$binary_base_rule", RuleClassType.ABSTRACT, true, baseRule) |
| .add( |
| attr("args", STRING_LIST) |
| .nonconfigurable("policy decision: should be consistent across configurations")) |
| .add(attr("output_licenses", LICENSE)) |
| .build(); |
| |
| /** Parent rule class for test Skylark rules. */ |
| public static final RuleClass testBaseRule = |
| new RuleClass.Builder("$test_base_rule", RuleClassType.ABSTRACT, true, baseRule) |
| .add(attr("size", STRING).value("medium").taggable() |
| .nonconfigurable("used in loading phase rule validation logic")) |
| .add(attr("timeout", STRING).taggable() |
| .nonconfigurable("used in loading phase rule validation logic").value( |
| new Attribute.ComputedDefault() { |
| @Override |
| public Object getDefault(AttributeMap rule) { |
| TestSize size = TestSize.getTestSize(rule.get("size", Type.STRING)); |
| if (size != null) { |
| String timeout = size.getDefaultTimeout().toString(); |
| if (timeout != null) { |
| return timeout; |
| } |
| } |
| return "illegal"; |
| } |
| })) |
| .add(attr("flaky", BOOLEAN).value(false).taggable() |
| .nonconfigurable("taggable - called in Rule.getRuleTags")) |
| .add(attr("shard_count", INTEGER).value(-1)) |
| .add(attr("local", BOOLEAN).value(false).taggable() |
| .nonconfigurable("policy decision: this should be consistent across configurations")) |
| .add(attr("args", STRING_LIST) |
| .nonconfigurable("policy decision: should be consistent across configurations")) |
| .add(attr("$test_runtime", LABEL_LIST).cfg(HOST).value(ImmutableList.of( |
| labelCache.getUnchecked("//tools/test:runtime")))) |
| .add(attr(":run_under", LABEL).cfg(DATA).value(RUN_UNDER)) |
| .build(); |
| |
| /** |
| * In native code, private values start with $. |
| * In Skylark, private values start with _, because of the grammar. |
| */ |
| private static String attributeToNative(String oldName, Location loc, boolean isLateBound) |
| throws EvalException { |
| if (oldName.isEmpty()) { |
| throw new EvalException(loc, "Attribute name cannot be empty"); |
| } |
| if (isLateBound) { |
| if (oldName.charAt(0) != '_') { |
| throw new EvalException(loc, "When an attribute value is a function, " |
| + "the attribute must be private (start with '_')"); |
| } |
| return ":" + oldName.substring(1); |
| } |
| if (oldName.charAt(0) == '_') { |
| return "$" + oldName.substring(1); |
| } |
| return oldName; |
| } |
| |
| // TODO(bazel-team): implement attribute copy and other rule properties |
| |
| @SkylarkSignature(name = "rule", doc = |
| "Creates a new rule. Store it in a global value, so that it can be loaded and called " |
| + "from BUILD files.", |
| returnType = BaseFunction.class, |
| mandatoryPositionals = { |
| @Param(name = "implementation", type = BaseFunction.class, |
| doc = "the function implementing this rule, must have exactly one parameter: " |
| + "<a href=\"ctx.html\">ctx</a>. The function is called during the analysis phase " |
| + "for each instance of the rule. It can access the attributes provided by the user. " |
| + "It must create actions to generate all the declared outputs.") |
| }, |
| optionalPositionals = { |
| @Param(name = "test", type = Boolean.class, defaultValue = "False", |
| doc = "Whether this rule is a test rule. " |
| + "If True, the rule must end with <code>_test</code> (otherwise it must not), " |
| + "and there must be an action that generates <code>ctx.outputs.executable</code>."), |
| @Param(name = "attrs", type = Map.class, noneable = true, defaultValue = "None", doc = |
| "dictionary to declare all the attributes of the rule. It maps from an attribute name " |
| + "to an attribute object (see <a href=\"attr.html\">attr</a> module). " |
| + "Attributes starting with <code>_</code> are private, and can be used to add " |
| + "an implicit dependency on a label. The attribute <code>name</code> is implicitly " |
| + "added and must not be specified. Attributes <code>visibility</code>, " |
| + "<code>deprecation</code>, <code>tags</code>, <code>testonly</code>, and " |
| + "<code>features</code> are implicitly added and might be overriden."), |
| // TODO(bazel-team): need to give the types of these builtin attributes |
| @Param(name = "outputs", type = Map.class, callbackEnabled = true, noneable = true, |
| defaultValue = "None", doc = "outputs of this rule. " |
| + "It is a dictionary mapping from string to a template name. " |
| + "For example: <code>{\"ext\": \"%{name}.ext\"}</code>. <br>" |
| + "The dictionary key becomes an attribute in <code>ctx.outputs</code>. " |
| // TODO(bazel-team): Make doc more clear, wrt late-bound attributes. |
| + "It may also be a function (which receives <code>ctx.attr</code> as argument) " |
| + "returning such a dictionary."), |
| @Param(name = "executable", type = Boolean.class, defaultValue = "False", |
| doc = "whether this rule is marked as executable or not. If True, " |
| + "there must be an action that generates <code>ctx.outputs.executable</code>."), |
| @Param(name = "output_to_genfiles", type = Boolean.class, defaultValue = "False", |
| doc = "If true, the files will be generated in the genfiles directory instead of the " |
| + "bin directory. Unless you need it for compatibility with existing rules " |
| + "(e.g. when generating header files for C++), do not set this flag."), |
| @Param(name = "fragments", type = SkylarkList.class, generic1 = String.class, |
| defaultValue = "[]", |
| doc = "List of names of configuration fragments that the rule requires " |
| + "in target configuration."), |
| @Param(name = "host_fragments", type = SkylarkList.class, generic1 = String.class, |
| defaultValue = "[]", |
| doc = "List of names of configuration fragments that the rule requires " |
| + "in host configuration.")}, |
| useAst = true, useEnvironment = true) |
| private static final BuiltinFunction rule = new BuiltinFunction("rule") { |
| @SuppressWarnings({"rawtypes", "unchecked"}) // castMap produces |
| // an Attribute.Builder instead of a Attribute.Builder<?> but it's OK. |
| public BaseFunction invoke(BaseFunction implementation, Boolean test, Object attrs, |
| Object implicitOutputs, Boolean executable, Boolean outputToGenfiles, SkylarkList fragments, |
| SkylarkList hostFragments, FuncallExpression ast, Environment funcallEnv) |
| throws EvalException, ConversionException { |
| funcallEnv.checkLoadingPhase("rule", ast.getLocation()); |
| RuleClassType type = test ? RuleClassType.TEST : RuleClassType.NORMAL; |
| RuleClass parent = test ? testBaseRule : (executable ? binaryBaseRule : baseRule); |
| |
| // We'll set the name later, pass the empty string for now. |
| RuleClass.Builder builder = new RuleClass.Builder("", type, true, parent); |
| |
| if (attrs != Runtime.NONE) { |
| for (Map.Entry<String, Attribute.Builder> attr : |
| castMap(attrs, String.class, Attribute.Builder.class, "attrs").entrySet()) { |
| Attribute.Builder<?> attrBuilder = (Attribute.Builder<?>) attr.getValue(); |
| String attrName = |
| attributeToNative(attr.getKey(), ast.getLocation(), attrBuilder.hasLateBoundValue()); |
| addAttribute(builder, attrBuilder.build(attrName)); |
| } |
| } |
| if (executable || test) { |
| addAttribute( |
| builder, |
| attr("$is_executable", BOOLEAN) |
| .value(true) |
| .nonconfigurable("Called from RunCommand.isExecutable, which takes a Target") |
| .build()); |
| builder.setOutputsDefaultExecutable(); |
| } |
| |
| if (implicitOutputs != Runtime.NONE) { |
| if (implicitOutputs instanceof BaseFunction) { |
| BaseFunction func = (BaseFunction) implicitOutputs; |
| SkylarkCallbackFunction callback = |
| new SkylarkCallbackFunction(func, ast, funcallEnv); |
| builder.setImplicitOutputsFunction( |
| new SkylarkImplicitOutputsFunctionWithCallback(callback, ast.getLocation())); |
| } else { |
| builder.setImplicitOutputsFunction( |
| new SkylarkImplicitOutputsFunctionWithMap( |
| ImmutableMap.copyOf(castMap( |
| implicitOutputs, String.class, String.class, |
| "implicit outputs of the rule class")))); |
| } |
| } |
| |
| if (outputToGenfiles) { |
| builder.setOutputToGenfiles(); |
| } |
| |
| registerRequiredFragments(fragments, hostFragments, builder); |
| builder.setConfiguredTargetFunction(implementation); |
| builder.setRuleDefinitionEnvironment(funcallEnv); |
| return new RuleFunction(builder, type); |
| } |
| |
| private void addAttribute(RuleClass.Builder builder, Attribute attribute) throws EvalException { |
| try { |
| builder.addOrOverrideAttribute(attribute); |
| } catch (IllegalArgumentException ex) { |
| throw new EvalException(location, ex); |
| } |
| } |
| |
| private void registerRequiredFragments( |
| SkylarkList fragments, SkylarkList hostFragments, RuleClass.Builder builder) { |
| Map<ConfigurationTransition, ImmutableSet<String>> map = new HashMap<>(); |
| addFragmentsToMap(map, fragments, NONE); // NONE represents target configuration |
| addFragmentsToMap(map, hostFragments, HOST); |
| |
| builder.requiresConfigurationFragments(new SkylarkModuleNameResolver(), map); |
| } |
| |
| private void addFragmentsToMap(Map<ConfigurationTransition, ImmutableSet<String>> map, |
| SkylarkList fragments, ConfigurationTransition config) { |
| if (!fragments.isEmpty()) { |
| map.put(config, ImmutableSet.copyOf(castList(fragments, String.class))); |
| } |
| } |
| }; |
| |
| // This class is needed for testing |
| public static final class RuleFunction extends BaseFunction { |
| // Note that this means that we can reuse the same builder. |
| // This is fine since we don't modify the builder from here. |
| private final RuleClass.Builder builder; |
| private final RuleClassType type; |
| private PathFragment skylarkFile; |
| private String ruleClassName; |
| |
| public RuleFunction(Builder builder, RuleClassType type) { |
| super("rule", FunctionSignature.KWARGS); |
| this.builder = builder; |
| this.type = type; |
| } |
| |
| @Override |
| @SuppressWarnings("unchecked") // the magic hidden $pkg_context variable is guaranteed |
| // to be a PackageContext |
| public Object call(Object[] args, FuncallExpression ast, Environment env) |
| throws EvalException, InterruptedException, ConversionException { |
| env.checkLoadingPhase(getName(), ast.getLocation()); |
| try { |
| if (ruleClassName == null || skylarkFile == null) { |
| throw new EvalException(ast.getLocation(), |
| "Invalid rule class hasn't been exported by a Skylark file"); |
| } |
| if (type == RuleClassType.TEST != TargetUtils.isTestRuleName(ruleClassName)) { |
| throw new EvalException(ast.getLocation(), "Invalid rule class name '" + ruleClassName |
| + "', test rule class names must end with '_test' and other rule classes must not"); |
| } |
| RuleClass ruleClass = builder.build(ruleClassName); |
| PackageContext pkgContext = (PackageContext) env.lookup(PackageFactory.PKG_CONTEXT); |
| return RuleFactory.createAndAddRule( |
| pkgContext, ruleClass, (Map<String, Object>) args[0], ast, env); |
| } catch (InvalidRuleException | NameConflictException | NoSuchVariableException e) { |
| throw new EvalException(ast.getLocation(), e.getMessage()); |
| } |
| } |
| |
| /** |
| * Export a RuleFunction from a Skylark file with a given name. |
| */ |
| void export(PathFragment skylarkFile, String ruleClassName) { |
| this.skylarkFile = skylarkFile; |
| this.ruleClassName = ruleClassName; |
| } |
| |
| @VisibleForTesting |
| public RuleClass.Builder getBuilder() { |
| return builder; |
| } |
| } |
| |
| public static void exportRuleFunctions(Environment env, PathFragment skylarkFile) { |
| for (String name : env.getGlobals().getDirectVariableNames()) { |
| try { |
| Object value = env.lookup(name); |
| if (value instanceof RuleFunction) { |
| RuleFunction function = (RuleFunction) value; |
| if (function.skylarkFile == null) { |
| function.export(skylarkFile, name); |
| } |
| } |
| } catch (NoSuchVariableException e) { |
| throw new AssertionError(e); |
| } |
| } |
| } |
| |
| @SkylarkSignature(name = "Label", doc = "Creates a Label referring to a BUILD target. Use " |
| + "this function only when you want to give a default value for the label attributes. " |
| + "The argument must refer to an absolute label. " |
| + "Example: <br><pre class=language-python>Label(\"//tools:default\")</pre>", |
| returnType = Label.class, |
| mandatoryPositionals = {@Param(name = "label_string", type = String.class, |
| doc = "the label string")}, |
| useLocation = true) |
| private static final BuiltinFunction label = new BuiltinFunction("Label") { |
| public Label invoke(String labelString, |
| Location loc) throws EvalException, ConversionException { |
| try { |
| return labelCache.get(labelString); |
| } catch (ExecutionException e) { |
| throw new EvalException(loc, "Illegal absolute label syntax: " + labelString); |
| } |
| } |
| }; |
| |
| @SkylarkSignature(name = "FileType", |
| doc = "Creates a file filter from a list of strings. For example, to match files ending " |
| + "with .cc or .cpp, use: <pre class=language-python>FileType([\".cc\", \".cpp\"])</pre>", |
| returnType = SkylarkFileType.class, |
| mandatoryPositionals = { |
| @Param(name = "types", type = SkylarkList.class, generic1 = String.class, defaultValue = "[]", |
| doc = "a list of the accepted file extensions")}) |
| private static final BuiltinFunction fileType = new BuiltinFunction("FileType") { |
| public SkylarkFileType invoke(SkylarkList types) throws ConversionException { |
| return SkylarkFileType.of(castList(types, String.class)); |
| } |
| }; |
| |
| @SkylarkSignature(name = "to_proto", |
| doc = "Creates a text message from the struct parameter. This method only works if all " |
| + "struct elements (recursively) are strings, ints, booleans, other structs or a " |
| + "list of these types. Quotes and new lines in strings are escaped. " |
| + "Examples:<br><pre class=language-python>" |
| + "struct(key=123).to_proto()\n# key: 123\n\n" |
| + "struct(key=True).to_proto()\n# key: true\n\n" |
| + "struct(key=[1, 2, 3]).to_proto()\n# key: 1\n# key: 2\n# key: 3\n\n" |
| + "struct(key='text').to_proto()\n# key: \"text\"\n\n" |
| + "struct(key=struct(inner_key='text')).to_proto()\n" |
| + "# key {\n# inner_key: \"text\"\n# }\n\n" |
| + "struct(key=[struct(inner_key=1), struct(inner_key=2)]).to_proto()\n" |
| + "# key {\n# inner_key: 1\n# }\n# key {\n# inner_key: 2\n# }\n\n" |
| + "struct(key=struct(inner_key=struct(inner_inner_key='text'))).to_proto()\n" |
| + "# key {\n# inner_key {\n# inner_inner_key: \"text\"\n# }\n# }\n</pre>", |
| objectType = SkylarkClassObject.class, returnType = String.class, |
| mandatoryPositionals = { |
| // TODO(bazel-team): shouldn't we accept any ClassObject? |
| @Param(name = "self", type = SkylarkClassObject.class, |
| doc = "this struct")}, |
| useLocation = true) |
| private static final BuiltinFunction toProto = new BuiltinFunction("to_proto") { |
| public String invoke(SkylarkClassObject self, Location loc) throws EvalException { |
| StringBuilder sb = new StringBuilder(); |
| printTextMessage(self, sb, 0, loc); |
| return sb.toString(); |
| } |
| |
| private void printTextMessage(ClassObject object, StringBuilder sb, |
| int indent, Location loc) throws EvalException { |
| for (String key : object.getKeys()) { |
| printTextMessage(key, object.getValue(key), sb, indent, loc); |
| } |
| } |
| |
| private void printSimpleTextMessage(String key, Object value, StringBuilder sb, |
| int indent, Location loc, String container) throws EvalException { |
| if (value instanceof ClassObject) { |
| print(sb, key + " {", indent); |
| printTextMessage((ClassObject) value, sb, indent + 1, loc); |
| print(sb, "}", indent); |
| } else if (value instanceof String) { |
| print(sb, key + ": \"" + escape((String) value) + "\"", indent); |
| } else if (value instanceof Integer) { |
| print(sb, key + ": " + value, indent); |
| } else if (value instanceof Boolean) { |
| // We're relying on the fact that Java converts Booleans to Strings in the same way |
| // as the protocol buffers do. |
| print(sb, key + ": " + value, indent); |
| } else { |
| throw new EvalException(loc, |
| "Invalid text format, expected a struct, a string, a bool, or an int but got a " |
| + EvalUtils.getDataTypeName(value) + " for " + container + " '" + key + "'"); |
| } |
| } |
| |
| private void printTextMessage(String key, Object value, StringBuilder sb, |
| int indent, Location loc) throws EvalException { |
| if (value instanceof SkylarkList) { |
| for (Object item : ((SkylarkList) value)) { |
| // TODO(bazel-team): There should be some constraint on the fields of the structs |
| // in the same list but we ignore that for now. |
| printSimpleTextMessage(key, item, sb, indent, loc, "list element in struct field"); |
| } |
| } else { |
| printSimpleTextMessage(key, value, sb, indent, loc, "struct field"); |
| } |
| } |
| |
| private String escape(String string) { |
| // TODO(bazel-team): use guava's SourceCodeEscapers when it's released. |
| return string.replace("\"", "\\\"").replace("\n", "\\n"); |
| } |
| |
| private void print(StringBuilder sb, String text, int indent) { |
| for (int i = 0; i < indent; i++) { |
| sb.append(" "); |
| } |
| sb.append(text); |
| sb.append("\n"); |
| } |
| }; |
| |
| static { |
| SkylarkSignatureProcessor.configureSkylarkFunctions(SkylarkRuleClassFunctions.class); |
| } |
| } |
