make chlog-new fails on branches containing . with "Error: non-yaml extension"

[damemi]

Component(s)

No response

What happened?

Description

Running make chlog-new fails with the following error:

$ make chlog-new
no Go files in /go/src/github.com/open-telemetry/opentelemetry-collector-contrib
mkdir -p /go/src/github.com/open-telemetry/opentelemetry-collector-contrib/.tools
cd /go/src/github.com/open-telemetry/opentelemetry-collector-contrib/internal/tools && go build -o /go/src/github.com/open-telemetry/opentelemetry-collector-contrib/.tools/chloggen -trimpath go.opentelemetry.io/build-tools/chloggen
/go/src/github.com/open-telemetry/opentelemetry-collector-contrib/.tools/chloggen new --filename gcp-v0.35.0
Error: non-yaml extension: .0
Usage:
  chloggen new [flags]

Flags:
  -f, --filename string   name of the file to add
  -h, --help              help for new

Global Flags:
      --chloggen-directory string   directory containing unreleased change log entries (default: .chloggen)

Error: non-yaml extension: .0
make: *** [Makefile:237: chlog-new] Error 1

It seems that branch names that contain dots break the filename parser. When I remove the dots the file is correctly generated as (in this example) gcp-v0350.yaml

Steps to Reproduce

Run make chlog-new from a branch with dots in the name.

Expected Result

The file is generated with .yaml appended regardless of the branch name.

Actual Result

The above error occurs. Note that updating this line in the makefile to add .yaml manually does work, ie a file named gcp-v0.35.0.yaml will be generated. So it seems like it's maybe just an issue in the changelog tool's filename parsing.

Collector version

main

Environment information

Environment

OS: (e.g., "Ubuntu 20.04")
Compiler(if manually compiled): (e.g., "go 14.2")

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

No response