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Allow for pluggable flag-level help text formatting

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by defining `cli.DefaultFlagStringFunc` with a default value that uses
`withEnvHint`, conditionally running a given flag's `FormatValueHelp` if
present.

Closes #257
This commit is contained in:
Dan Buch
2016-05-02 13:05:21 -04:00
parent d69b4400b5
commit 22773b14c1
4 changed files with 74 additions and 42 deletions
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4
funcs.go
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@@ -22,3 +22,7 @@ type CommandNotFoundFunc func(*Context, string)
// original error messages. If this function is not set, the "Incorrect usage"
// is displayed and the execution is interrupted.
type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error
// FlagStringFunc is used by the help generation to display a flag, which is
// expected to be a single line.
type FlagStringFunc func(Flag) string