rlwrap VS viper

Possibly more universal, but there are also tools like rlwrap [1] that adds readline support to programs that don't have it. From the docs apparently the readline library ships a similar tool ootb nowadays but I haven't tried that and just noticed now when I wanted to share the rlwrap link.

[1] https://github.com/hanslub42/rlwrap

Otherwise I use rlwrap, which is a general purpose readline wrapper: https://github.com/hanslub42/rlwrap It's pretty basic stuff, but makes basic line editing less painful, & adds history support.

Friends if you dont know: you can add readline support to LOTS of things, especially custom scripts and tools with a prompt by just calling the program with rlwrap.

> rlwrap is a 'readline wrapper', a small utility that uses the GNU Readline library to allow the editing of keyboard input for any command.

https://github.com/hanslub42/rlwrap

rlwrap for any interactive command will give it a history. You can even build a file to have tab completion. https://github.com/hanslub42/rlwrap

rlwrap is a 'readline wrapper', a small utility that uses the GNU Readline library to allow the editing of keyboard input for any command, something that tclsh, wish and sbcl don't provide.

This can be as easy as wrapping a simple stdin/stdout loop with rlwrap, all the way to using full featured TUI libraries like bubbletea (golang), textual (python) or imtui (c++).

You could always use rlwrap (installable via homebrew). You would launch R with rlwrap R in that case. However, I suspect there is something else missing, because it appears that the R repl usually includes readline support. Thus my questions about installation method and OS.

As you can see ,clj, behind the scenes, wraps a call to $bin_dir/clojure with the rlwrap tool. rlwrap provides a better command-line editing experience.

If read-line functionality is missing from languages that provide repls or command line interpreters, rlwrap has always served me well on linux. Many distros provide their own package too.

Once environment variables are setup we need load them into our project. For this this i will use viper

The code uses Viper to load configuration files in the application.

github.com/spf13/viper

Instead of directly accessing environment variables with os.Getenv(), integrating a configuration handler like viper might make it maintainable.

I guess most people are using https://github.com/spf13/viper but I don't know if I should read everything from

Use Viper for config file or environmental variable configuration -- it's going to save you a whole lot of time.

Cobra and Viper.

I've mostly been using https://github.com/spf13/viper of late for my go projects. It supports the standard config formats, (json, yaml, toml etc) and lets you override any value with a ENV value.