undefined: `flag.ParseErrorsWhitelist` - pflags breaking changes

[keyvhinng]

When trying to follow "My First CLI" guide:

mkdir my-cli

cd my-cli/

go mod init my-cli
go: creating new go.mod: module my-cli

go get -u github.com/spf13/cobra@latest
go: added github.com/inconshreveable/mousetrap v1.1.0
go: added github.com/spf13/cobra v1.9.1
go: added github.com/spf13/pflag v1.0.8

go install github.com/spf13/cobra-cli@latest

cobra-cli init
Your Cobra application is ready at
/Users/keyvhinng/Developer/learning/cli/my-cli

cobra-cli add serve
serve created at /Users/keyvhinng/Developer/learning/cli/my-cl

go build -o my-cli
# github.com/spf13/cobra
../../../../go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:42:30: undefined: flag.ParseErrorsWhitelist
../../../../go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:1875:12: c.Flags().ParseErrorsWhitelist undefined (type *pflag.FlagSet has no field or method ParseErrorsWhitelist)
../../../../go/pkg/mod/github.com/spf13/cobra@v1.9.1/command.go:1875:40: undefined: flag.ParseErrorsWhitelist

This is the response from Gemini:

It looks like you've run into a version incompatibility issue between the cobra library and the version of Go you're using. The
  error undefined: flag.ParseErrorsWhitelist happens because that feature was removed from Go's flag package in Go 1.20, and older
   versions of pflag (a dependency of Cobra) still try to use it.

Is cobra fully supported on Go 1.25 ?

[nightah]

Unrelated to Go 1.25 and instead due to a bump in spf/pflag.

[WeiChieh-Chen]

pflag.ParseErrorsWhitelist() has been removed ? this causes my code to fail to compile too

[marckhouzam]

You can go get the latest commit of cobra from main for the moment. I’ll look at doing a release tomorrow.

[marckhouzam]

Looking at the command that failed for you, if you run it again, it should now work: go get -u github.com/spf13/cobra@latest

[diazi0]

pflag.ParseErrorsWhitelist() has been removed ? this causes my code to fail to compile too

:( last pflag version introduced breaking changes, see the release notes

[keyvhinng]

@marckhouzam I can confirm it is working now

[jpmcb]

@keyvhinng - good to hear: I've cut v1.10.0 which should fix broken builds - https://github.com/spf13/cobra/releases/tag/v1.10.0

📣 If you're still experiencing issues, upgrade via:

go get -u github.com/spf13/cobra