function lint()

in ui-modules/utils/yaml-editor/addon/lint/lint-yaml-brooklyn.js [58:125]
62 lines of code
14 McCabe index (conditional complexity)

function lint(validator, baseSchema, text, options, cm) {
    return new Promise((resolve, reject) =>  {
        let issues = [];
        let parser = new JsYamlParser();

        try {
            let root = parser.parse(text);

            if (root) {
                validator.validate(root.result, JSON.parse(baseSchema), {propertyName: 'blueprint', nestedErrors: true}).errors.forEach(error => {
                    let from = CodeMirror.Pos(0, 0);
                    let to = CodeMirror.Pos(0, 0);
                    let yamlNode = findYamlNode(root, error.instance);

                    if (yamlNode) {
                        switch (error.name) {
                            case 'anyOf':
                            case 'oneOf':
                            case 'allOf':
                            case 'not':
                            case 'required':
                                from = to = getPostFromIndex(yamlNode.start, cm);
                                break;
                            case 'additionalProperties':
                                let childNode = yamlNode.children.find(child => child.result === error.argument);
                                from = getPostFromIndex(childNode.start, cm);
                                to = getPostFromIndex(childNode.end, cm);
                                break;
                            default:
                                from = getPostFromIndex(yamlNode.start, cm);
                                to = getPostFromIndex(yamlNode.end, cm);
                                break;
                        }
                    }
                    issues.push({
                        from: from,
                        to: to,
                        message: error.stack
                    });
                });
            }
        } catch (err) {
            if (err instanceof YAMLException) {
                // Inspire by the Mark.getSnippet() code: https://github.com/nodeca/js-yaml/blob/master/lib/js-yaml/mark.js#L16-L52
                let start = err.mark.position;
                while (start > 0 && '\x00\r\n\x85\u2028\u2029'.indexOf(err.mark.buffer.charAt(start - 1)) === -1) {
                    start--;
                }
                let end = err.mark.position - start;
                let errorText = err.mark.buffer.substr(start, end);

                issues.push({
                    from: CodeMirror.Pos(err.mark.line, cm.getLine(err.mark.line-1).indexOf(errorText)),
                    to: CodeMirror.Pos(err.mark.line, cm.getLine(err.mark.line-1).indexOf(errorText) + (errorText.length > 0 ? errorText.length : 1)),
                    message: err.reason
                });
            } else {
                issues.push({
                    from: CodeMirror.Pos(0, 0),
                    to: CodeMirror.Pos(0, 0),
                    message: err.message
                });
            }
        }

        return resolve(issues);
    });
}