EAN: 9781680506969

POWERFUL COMMAND-LINE APPLICATIONS IN GO - RICA...

Whether you want to automate tasks  analyze data  parse logs  talk to network services  or
address other systems requirements  writing your own command-line tool may be the fastest - and
perhaps the most fun - way to do it. The Go programming language is a great choice for
developing tools that are fast  reliable  and cross-platform. Create command-line tools that
work with files  connect to services  and even manage external processes  all while using tests
and benchmarks to ensure your programs are fast and correct. When you want to develop cross
platform command-line tools that are fast and reliable  use Go  a modern programming language
that combines the reliability of compiled languages with the ease of use and flexibility of
dynamic typed languages. Work through practical examples to develop elegant and efficient tools
by applying Go's rich standard library  its built in support for concurrency  and its
expressive syntax. Use Go's integrated testing capabilities to automatically test your tools 
ensuring they work reliably even across code refactoring. Develop CLI tools that interact with
your users by using common input output patterns  including environment variables and flags.
Handle files to read or persist data  and manipulate paths consistently in cross-platform
scenarios. Control processes and handle signals  and use a benchmark driven approach and Go's
concurrency primitives to create tools that perform well. Use powerful external libraries such
as Cobra to create modern and flexible tools that handle subcommands  and develop tools that
interact with databases  APIs  and network services. Finally  leverage what you learned by
tackling additional challenges at the end of each chapter. What You Need: Go 1.8 or higher  an
internet connection to download the example files and additional libraries  and a text editor
to write your programs.

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