feat: Support command selection with the config command

[mareksapota]

What type of PR is this?

feat: The config command is great for centralizing nwa configuration in a project. It is weird though that the command being executed is part of the configuration. My expectation for the config command would be to use pre-set paths, template, skip rules, etc. so one could run add/update manually and check in CI using the same configuration. Since YAML doesn't support importing currently one has to copy/paste configuration files for each command being executed.

This change adds -c and --command switches to the check command that can overwrite the default command. The priority order, low to high, is the default: add, the command line flag and what is configured in the config file with the highest priority.

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Test plan:

$ buildah build -t ghcr.io/b1nary-gr0up/nwa:main .
$ cat <<EOF > .nwa-config.yml
nwa:
  path:
    - "**/*.go"
  license: apache
  holder: "BINARY Members"
  year: 2023
EOF
$ # command line command
$ podman run --rm -v './:/src/' ghcr.io/b1nary-gr0up/nwa:main config .nwa-config.yml -c check
2025/01/25 12:09:51 WARN file does not have a matched header path=internal/header.go
[NWA SUMMARY] scanned=11 matched=10 mismatched=1 skipped=0 failed=0
$ # default command
$ podman run --rm -v './:/src/' ghcr.io/b1nary-gr0up/nwa:main config .nwa-config.yml
2025/01/25 12:10:34 WARN file already has a header path=cmd/add.go
2025/01/25 12:10:34 WARN file already has a header path=cmd/check.go
2025/01/25 12:10:34 WARN file already has a header path=internal/task.go
2025/01/25 12:10:34 WARN file already has a header path=internal/operation.go
2025/01/25 12:10:34 WARN file already has a header path=internal/tmpl.go
2025/01/25 12:10:34 WARN file already has a header path=main.go
2025/01/25 12:10:34 WARN file already has a header path=cmd/remove.go
2025/01/25 12:10:34 WARN file already has a header path=cmd/config.go
2025/01/25 12:10:34 WARN file already has a header path=cmd/root.go
2025/01/25 12:10:34 WARN file already has a header path=cmd/update.go
2025/01/25 12:10:34 WARN file already has a header path=internal/header.go
[NWA SUMMARY] scanned=11 modified=0 skipped=0 failed=0
$ cat <<EOF > .nwa-config.yml
nwa:
  path:
    - "**/*.go"
  license: apache
  holder: "BINARY Members"
  year: 2023
  cmd: "check"
EOF
$ # config file command
$ podman run --rm -v './:/src/' ghcr.io/b1nary-gr0up/nwa:main config .nwa-config.yml
2025/01/25 12:12:21 WARN file does not have a matched header path=internal/header.go
[NWA SUMMARY] scanned=11 matched=10 mismatched=1 skipped=0 failed=0

Which issue(s) this PR fixes:

Fixes #21

[justlorain]

I think it would be more intuitive to prioritize the command specified by --command with the following priority order:

the command line flag > configured in the config file > default add

However, there's no issue with this PR. I will submit a new commit to address the priority issue.

Thanks for your PR and suggestion, LGTM!

[mareksapota]

the command line flag > configured in the config file > default add

I think you're right, that order would be better.

I will submit a new commit to address the priority issue.

Awesome!