Enable FindString to search dotD config files

[dereknola]

Proposed Changes

• FindString now correctly searches for a CLI argument inside of the config.yaml.d folder

Types of Changes

CLI Bug Fix

Verification

Create a config folder setup:

• /etc/rancher/k3s/config.yaml and /etc/rancher/k3s/config.yaml.d/test.yaml
• Intest.yaml fill with prefer-bundled-bin: true
• Start K3s, check arguments passed to server

$ kubectl get nodes -o jsonpath='{.items[0].metadata.annotations.k3s\.io/node-args}{"\n"}'
["server","--token","********","--node-external-ip","10.10.10.100","--flannel-iface","eth1","--prefer-bundled-bin","true"]

Testing

New Unit test clause

Linked Issues

#7316

User-Facing Change

Further Comments

[codecov-commenter]

Codecov Report

Patch coverage: 75.00% and project coverage change: +0.11 🎉

Comparison is base (944f811) 19.30% compared to head (780f2be) 19.42%.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7323      +/-   ##
==========================================
+ Coverage   19.30%   19.42%   +0.11%     
==========================================
  Files          81       81              
  Lines        5459     5472      +13     
==========================================
+ Hits         1054     1063       +9     
- Misses       4183     4185       +2     
- Partials      222      224       +2     

Flag	Coverage Δ
unittests	19.42% <75.00%> (+0.11%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
pkg/configfilearg/parser.go	74.53% <75.00%> (-0.47%)	⬇️

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