Use Exec and ExecFunc

[cristaloleg]

Fixes #7

[codecov-commenter]

Codecov Report

Merging #34 (330710b) into main (a48909f) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   97.91%   97.98%   +0.06%     
==========================================
  Files           4        4              
  Lines         240      248       +8     
==========================================
+ Hits          235      243       +8     
  Misses          4        4              
  Partials        1        1              

Impacted Files	Coverage Δ
acmd.go	98.55% <100.00%> (+0.05%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a48909f...330710b. Read the comment docs.