github.com/urfave/cli

Fixed

• Fixes regression introduced in 1.19.0 where using an ActionFunc as the Action for a command would cause it to error rather than calling the function. Should not have a affected declarative cases using func(c *cli.Context) err).
• Shell completion now handles the case where the user specifies --generate-bash-completion immediately after a flag that takes an argument. Previously it call the application with --generate-bash-completion as the flag value.

Added

• FlagsByName was added to make it easy to sort flags (e.g. sort.Sort(cli.FlagsByName(app.Flags)))
• A Description field was added to App for a more detailed description of the application (similar to the existing Description field on Command)
• Flag type code generation via go generate
• Write to stderr and exit 1 if action returns non-nil error
• Added support for TOML to the altsrc loader
• SkipArgReorder was added to allow users to skip the argument reordering. This is useful if you want to consider all "flags" after an argument as arguments rather than flags (the default behavior of the stdlib flag library). This is backported functionality from the removal of the flag reordering in the unreleased version 2
• For formatted errors (those implementing ErrorFormatter), the errors will be formatted during output. Compatible with pkg/errors.

Changed

• Raise minimum tested/supported Go version to 1.2+

Fixed

• Consider empty environment variables as set (previously environment variables with the equivalent of "" would be skipped rather than their value used).
• Return an error if the value in a given environment variable cannot be parsed as the flag type. Previously these errors were silently swallowed.
• Print full error when an invalid flag is specified (which includes the invalid flag)
• App.Writer defaults to stdout when nil
• If no action is specified on a command or app, the help is now printed instead of panicing
• App.Metadata is initialized automatically now (previously was nil unless initialized)
• Correctly show help message if -h is provided to a subcommand
• context.(Global)IsSet now respects environment variables. Previously it would return false if a flag was specified in the environment rather than as an argument
• Removed deprecation warnings to STDERR to avoid them leaking to the end-user
• altsrcs import paths were updated to use gopkg.in/urfave/cli.v1. This fixes issues that occurred when gopkg.in/urfave/cli.v1 was imported as well as altsrc where Go would complain that the types didn't match

Fixed

• Removed deprecation warnings to STDERR to avoid them leaking to the end-user (backported)

Added

• ./runtests test runner with coverage tracking by default
• testing on OS X
• testing on Windows
• UintFlag, Uint64Flag, and Int64Flag types and supporting code

Changed

• Use spaces for alignment in help/usage output instead of tabs, making the output alignment consistent regardless of tab width

Fixed

• Printing of command aliases in help text
• Printing of visible flags for both struct and struct pointer flags
• Display the help subcommand when using CommandCategories
• No longer swallows panics that occur within the Actions themselves when detecting the signature of the Action field

Fixed

• Removed deprecation warnings to STDERR to avoid them leaking to the end-user