Examples with ListType com.google.devtools.build.lib.syntax.Type.ListType used on opensource projects

Example 1 with ListType

use of com.google.devtools.build.lib.syntax.Type.ListType in project bazel by bazelbuild.

the class BuildRuleWithDefaultsBuilder method populateLabelAttribute.

/**
   * Populates the label type attribute with generated values. Populates with a file if possible, or
   * generates an appropriate rule. Note, that the rules are always generated in the same package.
   */
public BuildRuleWithDefaultsBuilder populateLabelAttribute(String rulePkg, String filePkg, Attribute attribute) {
    Type<?> attrType = attribute.getType();
    String label = null;
    if (attribute.getAllowedFileTypesPredicate() != FileTypeSet.NO_FILE) {
        // Try to populate with files first
        String extension = null;
        if (attribute.getAllowedFileTypesPredicate() == FileTypeSet.ANY_FILE) {
            extension = ".txt";
        } else {
            FileTypeSet fileTypes = attribute.getAllowedFileTypesPredicate();
            // This argument should always hold, if not that means a Blaze design/implementation error
            Preconditions.checkArgument(!fileTypes.getExtensions().isEmpty());
            extension = fileTypes.getExtensions().get(0);
        }
        label = getDummyFileLabel(rulePkg, filePkg, extension, attrType);
    } else {
        Predicate<RuleClass> allowedRuleClasses = attribute.getAllowedRuleClassesPredicate();
        if (allowedRuleClasses != Predicates.<RuleClass>alwaysFalse()) {
            // See if there is an applicable rule among the already enqueued rules
            BuildRuleBuilder referencedRuleBuilder = getFirstApplicableRule(allowedRuleClasses);
            if (referencedRuleBuilder != null) {
                label = ":" + referencedRuleBuilder.ruleName;
            } else {
                RuleClass referencedRuleClass = getFirstApplicableRuleClass(allowedRuleClasses);
                if (referencedRuleClass != null) {
                    // Generate a rule with the appropriate ruleClass and a label for it in
                    // the original rule
                    label = ":" + getDummyRuleLabel(rulePkg, referencedRuleClass);
                }
            }
        }
    }
    if (label != null) {
        if (attrType instanceof ListType<?>) {
            addMultiValueAttributes(attribute.getName(), label);
        } else {
            setSingleValueAttribute(attribute.getName(), label);
        }
    }
    return this;
}