urfave/cli is a declarative, simple, fast, and fun package for building command line tools in Go featuring:

• commands and subcommands with alias and prefix match support
• flexible and permissive help system
• dynamic shell completion for bash, zsh, fish, and powershell
• no dependencies except Go standard library
• input flags for simple types, slices of simple types, time, duration, and others
• compound short flag support (-a -b -c can be shortened to -abc)
• documentation generation in man and Markdown (supported via the urfave/cli-docs module)
• input lookup from:
  • environment variables
  • plain text files
  • structured file formats (supported via the urfave/cli-altsrc module)

See the hosted documentation website at https://cli.urfave.org. Contents of this website are built from the ./docs directory.

Check the Q&A discussions. If you don't find answer to your question, create a new discussion.

If you found a bug or have a feature request, create a new issue.

Please keep in mind that this project is run by unpaid volunteers.

See LICENSE.