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-# Change Log
-
-**ATTN**: This project uses [semantic versioning](http://semver.org/).
-
-## [Unreleased]
-
-## 1.20.0 - 2017-08-10
-
-### Fixed
-
-* `HandleExitCoder` is now correctly iterates over all errors in
- a `MultiError`. The exit code is the exit code of the last error or `1` if
- there are no `ExitCoder`s in the `MultiError`.
-* Fixed YAML file loading on Windows (previously would fail validate the file path)
-* Subcommand `Usage`, `Description`, `ArgsUsage`, `OnUsageError` correctly
- propogated
-* `ErrWriter` is now passed downwards through command structure to avoid the
- need to redefine it
-* Pass `Command` context into `OnUsageError` rather than parent context so that
- all fields are avaiable
-* Errors occuring in `Before` funcs are no longer double printed
-* Use `UsageText` in the help templates for commands and subcommands if
- defined; otherwise build the usage as before (was previously ignoring this
- field)
-* `IsSet` and `GlobalIsSet` now correctly return whether a flag is set if
- a program calls `Set` or `GlobalSet` directly after flag parsing (would
- previously only return `true` if the flag was set during parsing)
-
-### Changed
-
-* No longer exit the program on command/subcommand error if the error raised is
- not an `OsExiter`. This exiting behavior was introduced in 1.19.0, but was
- determined to be a regression in functionality. See [the
- PR](https://github.com/urfave/cli/pull/595) for discussion.
-
-### Added
-
-* `CommandsByName` type was added to make it easy to sort `Command`s by name,
- alphabetically
-* `altsrc` now handles loading of string and int arrays from TOML
-* Support for definition of custom help templates for `App` via
- `CustomAppHelpTemplate`
-* Support for arbitrary key/value fields on `App` to be used with
- `CustomAppHelpTemplate` via `ExtraInfo`
-* `HelpFlag`, `VersionFlag`, and `BashCompletionFlag` changed to explictly be
- `cli.Flag`s allowing for the use of custom flags satisfying the `cli.Flag`
- interface to be used.
-
-
-## [1.19.1] - 2016-11-21
-
-### 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.
-
-## [1.19.0] - 2016-11-19
-### 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](https://github.com/urfave/cli/pull/398) 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 `panic`ing
-- `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
-- `altsrc`s 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
-
-## [1.18.1] - 2016-08-28
-### Fixed
-- Removed deprecation warnings to STDERR to avoid them leaking to the end-user (backported)
-
-## [1.18.0] - 2016-06-27
-### 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 `panic`s that occur within the `Action`s themselves when
- detecting the signature of the `Action` field
-
-## [1.17.1] - 2016-08-28
-### Fixed
-- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
-
-## [1.17.0] - 2016-05-09
-### Added
-- Pluggable flag-level help text rendering via `cli.DefaultFlagStringFunc`
-- `context.GlobalBoolT` was 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 `DurationFlag` default 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.
-- `IntSliceFlag` and `StringSliceFlag` usage 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 `cli` since they can trust
- that a 0 exit code indicated a successful execution.
-- cleanups based on [Go Report Card
- feedback](https://goreportcard.com/report/github.com/urfave/cli)
-
-## [1.16.1] - 2016-08-28
-### Fixed
-- Removed deprecation warnings to STDERR to avoid them leaking to the end-user
-
-## [1.16.0] - 2016-05-02
-### Added
-- `Hidden` field 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 `Hidden` field
-
-### Fixed
-- handling of error values in `HandleAction` and `HandleExitCoder`
-
-## [1.15.0] - 2016-04-30
-### Added
-- This file!
-- Support for placeholders in flag usage strings
-- `App.Metadata` map for arbitrary data/state management
-- `Set` and `GlobalSet` methods on `*cli.Context` for altering values after
-parsing.
-- Support for nested lookup of dot-delimited keys in structures loaded from
-YAML.
-
-### Changed
-- The `App.Action` and `Command.Action` now prefer a return signature of
-`func(*cli.Context) error`, as defined by `cli.ActionFunc`. If a non-nil
-`error` is returned, there may be two outcomes:
- - If the error fulfills `cli.ExitCoder`, then `os.Exit` will be called
- automatically
- - Else the error is bubbled up and returned from `App.Run`
-- Specifying an `Action` with the legacy return signature of
-`func(*cli.Context)` will produce a deprecation message to stderr
-- Specifying an `Action` that is not a `func` type will produce a non-zero exit
-from `App.Run`
-- Specifying an `Action` func that has an invalid (input) signature will
-produce a non-zero exit from `App.Run`
-
-### Deprecated
-- <a name="deprecated-cli-app-runandexitonerror"></a>
-`cli.App.RunAndExitOnError`, which should now be done by returning an error
-that fulfills `cli.ExitCoder` to `cli.App.Run`.
-- <a name="deprecated-cli-app-action-signature"></a> the legacy signature for
-`cli.App.Action` of `func(*cli.Context)`, which should now have a return
-signature of `func(*cli.Context) error`, as defined by `cli.ActionFunc`.
-
-### Fixed
-- Added missing `*cli.Context.GlobalFloat64` method
-
-## [1.14.0] - 2016-04-03 (backfilled 2016-04-25)
-### Added
-- Codebeat badge
-- Support for categorization via `CategorizedHelp` and `Categories` on app.
-
-### Changed
-- Use `filepath.Base` instead of `path.Base` in `Name` and `HelpName`.
-
-### Fixed
-- Ensure version is not shown in help text when `HideVersion` set.
-
-## [1.13.0] - 2016-03-06 (backfilled 2016-04-25)
-### Added
-- YAML file input support.
-- `NArg` method on context.
-
-## [1.12.0] - 2016-02-17 (backfilled 2016-04-25)
-### Added
-- Custom usage error handling.
-- Custom text support in `USAGE` section of help output.
-- Improved help messages for empty strings.
-- AppVeyor CI configuration.
-
-### Changed
-- Removed `panic` from default help printer func.
-- De-duping and optimizations.
-
-### Fixed
-- Correctly handle `Before`/`After` at 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.Base` in `Name` and `HelpName`
-- Export `GetName` on 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 `tip` in 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.
-- `ArgsUsage` at app and command level for help text flexibility.
-
-### Fixed
-- Honor `HideHelp` and `HideVersion` in `App.Run`.
-- Remove juvenile word from README.
-
-## [1.9.0] - 2015-09-08 (backfilled 2016-04-25)
-### Added
-- `FullName` on command with accompanying help output update.
-- Set default `$PROG` in 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 `Copyright` at app level.
-- `Parent` func 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`/`After` funcs.
-- 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
-- `HelpPrinter` signature includes output writer.
-
-### Fixed
-- Specify go 1.1+ in docs.
-- Set `Writer` when running command as app.
-
-## [1.6.0] - 2015-03-23 (backfilled 2016-04-25)
-### Added
-- Multiple author support.
-- `NumFlags` at context level.
-- `Aliases` at command level.
-
-### Deprecated
-- `ShortName` at command level.
-
-### Fixed
-- Subcommand help output.
-- Backward compatible support for deprecated `Author` and `Email` fields.
-- Docs regarding `Names`/`Aliases`.
-
-## [1.5.0] - 2015-02-20 (backfilled 2016-04-25)
-### Added
-- `After` hook 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 / --help` flags, but not `help` subcommand.
-- Stop flag parsing after `--`.
-
-### Fixed
-- Help text for generic flags to specify single value.
-- Use double quotes in output for defaults.
-- Use `ParseInt` instead of `ParseUint` for int environment var values.
-- Use `0` as 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 `Stdout` on 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 / --version` flag made optional.
-
-## [1.3.0] - 2014-08-10 (backfilled 2016-04-25)
-### Added
-- `FlagNames` at context level.
-- Exposed `VersionPrinter` var for more control over version output.
-- Zsh completion hook.
-- `AUTHOR` section in default app help template.
-- Contribution guidelines.
-- `DurationFlag` type.
-
-## [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 `Compiled` metadata on app.
-- `Before` hook func support at app and command level.
-- `CommandNotFound` func support at app level.
-- Command reference available on context.
-- `GenericFlag` type.
-- `Float64Flag` type.
-- `BoolTFlag` type.
-- `IsSet` flag helper on context.
-- More flag lookup funcs at context level.
-- More tests &amp; docs.
-
-### Changed
-- Help template updates to account for presence/absence of flags.
-- Separated subcommand help template.
-- Exposed `HelpPrinter` var for more control over help output.
-
-## [1.0.0] - 2013-11-01
-### Added
-- `help` flag in default app flag set and each command flag set.
-- Custom handling of argument parsing errors.
-- Command lookup by name at app level.
-- `StringSliceFlag` type and supporting `StringSlice` type.
-- `IntSliceFlag` type and supporting `IntSlice` type.
-- Slice type flag lookups by name at context level.
-- Export of app and command help functions.
-- More tests &amp; docs.
-
-## 0.1.0 - 2013-07-22
-### Added
-- Initial implementation.
-
-[Unreleased]: https://github.com/urfave/cli/compare/v1.18.0...HEAD
-[1.18.0]: https://github.com/urfave/cli/compare/v1.17.0...v1.18.0
-[1.17.0]: https://github.com/urfave/cli/compare/v1.16.0...v1.17.0
-[1.16.0]: https://github.com/urfave/cli/compare/v1.15.0...v1.16.0
-[1.15.0]: https://github.com/urfave/cli/compare/v1.14.0...v1.15.0
-[1.14.0]: https://github.com/urfave/cli/compare/v1.13.0...v1.14.0
-[1.13.0]: https://github.com/urfave/cli/compare/v1.12.0...v1.13.0
-[1.12.0]: https://github.com/urfave/cli/compare/v1.11.1...v1.12.0
-[1.11.1]: https://github.com/urfave/cli/compare/v1.11.0...v1.11.1
-[1.11.0]: https://github.com/urfave/cli/compare/v1.10.2...v1.11.0
-[1.10.2]: https://github.com/urfave/cli/compare/v1.10.1...v1.10.2
-[1.10.1]: https://github.com/urfave/cli/compare/v1.10.0...v1.10.1
-[1.10.0]: https://github.com/urfave/cli/compare/v1.9.0...v1.10.0
-[1.9.0]: https://github.com/urfave/cli/compare/v1.8.0...v1.9.0
-[1.8.0]: https://github.com/urfave/cli/compare/v1.7.1...v1.8.0
-[1.7.1]: https://github.com/urfave/cli/compare/v1.7.0...v1.7.1
-[1.7.0]: https://github.com/urfave/cli/compare/v1.6.0...v1.7.0
-[1.6.0]: https://github.com/urfave/cli/compare/v1.5.0...v1.6.0
-[1.5.0]: https://github.com/urfave/cli/compare/v1.4.1...v1.5.0
-[1.4.1]: https://github.com/urfave/cli/compare/v1.4.0...v1.4.1
-[1.4.0]: https://github.com/urfave/cli/compare/v1.3.1...v1.4.0
-[1.3.1]: https://github.com/urfave/cli/compare/v1.3.0...v1.3.1
-[1.3.0]: https://github.com/urfave/cli/compare/v1.2.0...v1.3.0
-[1.2.0]: https://github.com/urfave/cli/compare/v1.1.0...v1.2.0
-[1.1.0]: https://github.com/urfave/cli/compare/v1.0.0...v1.1.0
-[1.0.0]: https://github.com/urfave/cli/compare/v0.1.0...v1.0.0