The command --version only works if the config.yml file exist

[Th0masL]

It's not a big problem, but it seems like the command --version only works from a folder where there's a config.yml file (even empty).

# Show folder content
root@prometheus:/tmp/json_exporter-0.3.0.darwin-amd64# ls
LICENSE
json_exporter

# Try to show the version
root@prometheus:/tmp/json_exporter-0.3.0.darwin-amd64# ./json_exporter --version
json_exporter: error: path 'config.yml' does not exist, try --help

# Create an empty config.yml file
root@prometheus:/tmp/json_exporter-0.3.0.darwin-amd64# touch config.yml

# Try to show the version
root@prometheus:/tmp/json_exporter-0.3.0.darwin-amd64# ./json_exporter --version
json_exporter, version 0.3.0 (branch: HEAD, revision: ae58e1f3e7161fb2a2a90a16998db0c072e2d532)
  build user:       root@46db6777a64c
  build date:       20210214-02:17:04
  go version:       go1.15.8
  platform:         linux/amd64

[rustycl0ck]

This is a known issue in the kingpin.v2 library - alecthomas/kingpin#261