chore: grep failed when in some special scenario

[CarlJi]

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[codecov]

Codecov Report

Merging #327 (4c909b6) into master (a3dfbf5) will increase coverage by 0.09%.
The diff coverage is n/a.

❗ Current head 4c909b6 differs from pull request most recent head 3901c0e. Consider uploading reports for the commit 3901c0e to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #327      +/-   ##
==========================================
+ Coverage   70.76%   70.85%   +0.09%     
==========================================
  Files          34       34              
  Lines        2035     2035              
==========================================
+ Hits         1440     1442       +2     
+ Misses        481      480       -1     
+ Partials      114      113       -1     

Flag	Coverage Δ
unittest-1.16.x	70.76% <ø> (+0.09%)	⬆️
unittest-1.17.x	70.76% <ø> (ø)
unittest-1.18.x	70.76% <ø> (+0.09%)	⬆️
unittest-1.19.x	70.76% <ø> (+0.09%)	⬆️

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Impacted Files	Coverage Δ
pkg/build/legacy.go	100.00% <0.00%> (+4.87%)	⬆️