/**
* Creates and returns a rule instance.
*
* <p>It is the caller's responsibility to add the rule to the package (the caller may choose not
* to do so if, for example, the rule has errors).
*/
static Rule createRule(
Package.Builder pkgBuilder,
RuleClass ruleClass,
BuildLangTypedAttributeValuesMap attributeValues,
EventHandler eventHandler,
@Nullable FuncallExpression ast,
Location location,
@Nullable Environment env)
throws InvalidRuleException, InterruptedException {
Preconditions.checkNotNull(ruleClass);
String ruleClassName = ruleClass.getName();
Object nameObject = attributeValues.getAttributeValue("name");
if (nameObject == null) {
throw new InvalidRuleException(ruleClassName + " rule has no 'name' attribute");
} else if (!(nameObject instanceof String)) {
throw new InvalidRuleException(ruleClassName + " 'name' attribute must be a string");
}
String name = (String) nameObject;
Label label;
try {
// Test that this would form a valid label name -- in particular, this
// catches cases where Makefile variables $(foo) appear in "name".
label = pkgBuilder.createLabel(name);
} catch (LabelSyntaxException e) {
throw new InvalidRuleException("illegal rule name: " + name + ": " + e.getMessage());
}
boolean inWorkspaceFile = pkgBuilder.isWorkspace();
if (ruleClass.getWorkspaceOnly() && !inWorkspaceFile) {
throw new RuleFactory.InvalidRuleException(
ruleClass + " must be in the WORKSPACE file " + "(used by " + label + ")");
} else if (!ruleClass.getWorkspaceOnly() && inWorkspaceFile) {
throw new RuleFactory.InvalidRuleException(
ruleClass + " cannot be in the WORKSPACE file " + "(used by " + label + ")");
}
AttributesAndLocation generator =
generatorAttributesForMacros(attributeValues, env, location, label);
try {
return ruleClass.createRule(
pkgBuilder,
label,
generator.attributes,
eventHandler,
ast,
generator.location,
new AttributeContainer(ruleClass));
} catch (LabelSyntaxException e) {
throw new RuleFactory.InvalidRuleException(ruleClass + " " + e.getMessage());
}
}
