How to download and setup rubocop-ast
Open terminal and run command
                                            git clone https://github.com/rubocop/rubocop-ast.git
                                        
                                        git clone is used to create a copy or clone of rubocop-ast repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with rubocop-ast https://github.com/rubocop/rubocop-ast/archive/master.zip
Or simply clone rubocop-ast with SSH
                                            [email protected]:rubocop/rubocop-ast.git                                    
                                    If you have some problems with rubocop-ast
You may open issue on rubocop-ast support forum (system) here: https://github.com/rubocop/rubocop-ast/issuesSimilar to rubocop-ast repositories
Here you may see rubocop-ast alternatives and analogs
babel prettier postcss PHP-Parser js-code-to-svg-flowchart node-dependency-tree node-precinct detective esdoc javaparser spoon bblfshd astexplorer babylon esprima JSqlParser compodoc bellybutton tiny-compiler webassemblyjs react-monocle estree escodegen remark retext gitbase participle birdseye tolerant-php-parser proposal-binary-ast