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				Change Log
ATTN: This project uses semantic versioning.
Unreleased
Added
- 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 altsrcloader
Changed
- Raise minimum tested/supported Go version to 1.2+
1.18.0 - 2016-06-27
Added
- ./runteststest runner with coverage tracking by default
- testing on OS X
- testing on Windows
- UintFlag,- Uint64Flag, and- Int64Flagtypes 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 helpsubcommand when usingCommandCategories
- No longer swallows panics that occur within theActions themselves when detecting the signature of theActionfield
1.17.0 - 2016-05-09
Added
- Pluggable flag-level help text rendering via cli.DefaultFlagStringFunc
- context.GlobalBoolTwas added as an analogue to- context.GlobalBool
- Support for hiding commands by setting Hidden: true-- this will hide the commands in help output
Changed
- Float64Flag,- IntFlag, and- DurationFlagdefault values are no longer quoted in help text output.
- All flag types now include (default: {value})strings following usage when a default value can be (reasonably) detected.
- IntSliceFlagand- StringSliceFlagusage strings are now more consistent with non-slice flag types
- Apps now exit with a code of 3 if an unknown subcommand is specified
(previously they printed "No help topic for...", but still exited 0. This
makes it easier to script around apps built using clisince they can trust that a 0 exit code indicated a successful execution.
- cleanups based on Go Report Card feedback
1.16.0 - 2016-05-02
Added
- Hiddenfield on all flag struct types to omit from generated help text
Changed
- BashCompletionFlag(- --enable-bash-completion) is now omitted from generated help text via the- Hiddenfield
Fixed
- handling of error values in HandleActionandHandleExitCoder
1.15.0 - 2016-04-30
Added
- This file!
- Support for placeholders in flag usage strings
- App.Metadatamap for arbitrary data/state management
- Setand- GlobalSetmethods on- *cli.Contextfor altering values after parsing.
- Support for nested lookup of dot-delimited keys in structures loaded from YAML.
Changed
- The App.ActionandCommand.Actionnow prefer a return signature offunc(*cli.Context) error, as defined bycli.ActionFunc. If a non-nilerroris returned, there may be two outcomes:- If the error fulfills cli.ExitCoder, thenos.Exitwill be called automatically
- Else the error is bubbled up and returned from App.Run
 
- If the error fulfills 
- Specifying an Actionwith the legacy return signature offunc(*cli.Context)will produce a deprecation message to stderr
- Specifying an Actionthat is not afunctype will produce a non-zero exit fromApp.Run
- Specifying an Actionfunc that has an invalid (input) signature will produce a non-zero exit fromApp.Run
Deprecated
- 
cli.App.RunAndExitOnError, which should now be done by returning an error that fulfillscli.ExitCodertocli.App.Run.
-  the legacy signature for
cli.App.Actionoffunc(*cli.Context), which should now have a return signature offunc(*cli.Context) error, as defined bycli.ActionFunc.
Fixed
- Added missing *cli.Context.GlobalFloat64method
1.14.0 - 2016-04-03 (backfilled 2016-04-25)
Added
- Codebeat badge
- Support for categorization via CategorizedHelpandCategorieson app.
Changed
- Use filepath.Baseinstead ofpath.BaseinNameandHelpName.
Fixed
- Ensure version is not shown in help text when HideVersionset.
1.13.0 - 2016-03-06 (backfilled 2016-04-25)
Added
- YAML file input support.
- NArgmethod on context.
1.12.0 - 2016-02-17 (backfilled 2016-04-25)
Added
- Custom usage error handling.
- Custom text support in USAGEsection of help output.
- Improved help messages for empty strings.
- AppVeyor CI configuration.
Changed
- Removed panicfrom default help printer func.
- De-duping and optimizations.
Fixed
- Correctly handle Before/Afterat command level when no subcommands.
- Case of literal -argument causing flag reordering.
- Environment variable hints on Windows.
- Docs updates.
1.11.1 - 2015-12-21 (backfilled 2016-04-25)
Changed
- Use path.BaseinNameandHelpName
- Export GetNameon flag types.
Fixed
- Flag parsing when skipping is enabled.
- Test output cleanup.
- Move completion check to account for empty input case.
1.11.0 - 2015-11-15 (backfilled 2016-04-25)
Added
- Destination scan support for flags.
- Testing against tipin Travis CI config.
Changed
- Go version in Travis CI config.
Fixed
- Removed redundant tests.
- Use correct example naming in tests.
1.10.2 - 2015-10-29 (backfilled 2016-04-25)
Fixed
- Remove unused var in bash completion.
1.10.1 - 2015-10-21 (backfilled 2016-04-25)
Added
- Coverage and reference logos in README.
Fixed
- Use specified values in help and version parsing.
- Only display app version and help message once.
1.10.0 - 2015-10-06 (backfilled 2016-04-25)
Added
- More tests for existing functionality.
- ArgsUsageat app and command level for help text flexibility.
Fixed
- Honor HideHelpandHideVersioninApp.Run.
- Remove juvenile word from README.
1.9.0 - 2015-09-08 (backfilled 2016-04-25)
Added
- FullNameon command with accompanying help output update.
- Set default $PROGin bash completion.
Changed
- Docs formatting.
Fixed
- Removed self-referential imports in tests.
1.8.0 - 2015-06-30 (backfilled 2016-04-25)
Added
- Support for Copyrightat app level.
- Parentfunc at context level to walk up context lineage.
Fixed
- Global flag processing at top level.
1.7.1 - 2015-06-11 (backfilled 2016-04-25)
Added
- Aggregate errors from Before/Afterfuncs.
- Doc comments on flag structs.
- Include non-global flags when checking version and help.
- Travis CI config updates.
Fixed
- Ensure slice type flags have non-nil values.
- Collect global flags from the full command hierarchy.
- Docs prose.
1.7.0 - 2015-05-03 (backfilled 2016-04-25)
Changed
- HelpPrintersignature includes output writer.
Fixed
- Specify go 1.1+ in docs.
- Set Writerwhen running command as app.
1.6.0 - 2015-03-23 (backfilled 2016-04-25)
Added
- Multiple author support.
- NumFlagsat context level.
- Aliasesat command level.
Deprecated
- ShortNameat command level.
Fixed
- Subcommand help output.
- Backward compatible support for deprecated AuthorandEmailfields.
- Docs regarding Names/Aliases.
1.5.0 - 2015-02-20 (backfilled 2016-04-25)
Added
- Afterhook func support at app and command level.
Fixed
- Use parsed context when running command as subcommand.
- Docs prose.
1.4.1 - 2015-01-09 (backfilled 2016-04-25)
Added
- Support for hiding -h / --helpflags, but nothelpsubcommand.
- Stop flag parsing after --.
Fixed
- Help text for generic flags to specify single value.
- Use double quotes in output for defaults.
- Use ParseIntinstead ofParseUintfor int environment var values.
- Use 0as base when parsing int environment var values.
1.4.0 - 2014-12-12 (backfilled 2016-04-25)
Added
- Support for environment variable lookup "cascade".
- Support for Stdouton app for output redirection.
Fixed
- Print command help instead of app help in ShowCommandHelp.
1.3.1 - 2014-11-13 (backfilled 2016-04-25)
Added
- Docs and example code updates.
Changed
- Default -v / --versionflag made optional.
1.3.0 - 2014-08-10 (backfilled 2016-04-25)
Added
- FlagNamesat context level.
- Exposed VersionPrintervar for more control over version output.
- Zsh completion hook.
- AUTHORsection in default app help template.
- Contribution guidelines.
- DurationFlagtype.
1.2.0 - 2014-08-02
Added
- Support for environment variable defaults on flags plus tests.
1.1.0 - 2014-07-15
Added
- Bash completion.
- Optional hiding of built-in help command.
- Optional skipping of flag parsing at command level.
- Author,- Email, and- Compiledmetadata on app.
- Beforehook func support at app and command level.
- CommandNotFoundfunc support at app level.
- Command reference available on context.
- GenericFlagtype.
- Float64Flagtype.
- BoolTFlagtype.
- IsSetflag helper on context.
- More flag lookup funcs at context level.
- More tests & docs.
Changed
- Help template updates to account for presence/absence of flags.
- Separated subcommand help template.
- Exposed HelpPrintervar for more control over help output.
1.0.0 - 2013-11-01
Added
- helpflag in default app flag set and each command flag set.
- Custom handling of argument parsing errors.
- Command lookup by name at app level.
- StringSliceFlagtype and supporting- StringSlicetype.
- IntSliceFlagtype and supporting- IntSlicetype.
- Slice type flag lookups by name at context level.
- Export of app and command help functions.
- More tests & docs.
0.1.0 - 2013-07-22
Added
- Initial implementation.