Question 1

How do I handle boolean flags that accept true/false arguments in Slop?

Accepted Answer

Slop's bool option type can optionally take an argument; for example, in the README, --use-keychain false sets the value to false, while the flag being present returns true for the predicate method like use_keychain?.

Question 2

Slop vs OptionParser in Ruby: which should I use?

Accepted Answer

Slop offers a more intuitive DSL and automatic help, making it faster for development with complex options, while OptionParser is part of the standard library and better for dependency-free projects. Slop is ideal when you value rapid prototyping and extensibility.

Question 3

How to add custom validation logic in Slop?

Accepted Answer

Create a custom option class inheriting from Slop::Option, implement the call method for parsing and optionally the finish method for post-processing, as shown in the 'Custom option types' section for mutating values based on other options.

Question 4

Can Slop separate options from other command-line arguments?

Accepted Answer

Yes, use opts.arguments to retrieve unprocessed arguments, which is useful for scripts mixing options with inputs like filenames, as explained in the 'Arguments' section with ARGF examples.

Question 5

How to suppress error messages in Slop when parsing invalid options?

Accepted Answer

Set suppress_errors: true globally in the parse method or per option to prevent Slop from raising exceptions for missing or unknown options, allowing graceful fallback handling.

Question 6

Is Slop good for building CLI tools with Git-like subcommands?

Accepted Answer

Not directly; Slop lacks built-in subcommand support, so you'd need to parse the first argument manually and instantiate separate Slop parsers for each subcommand, making it cumbersome compared to dedicated libraries like Thor.

Slop

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