Recently I faced an issue with compile -O for product build. I assumed that It caused by dead function issue. I reported it
This post I’ll introduce static analyzer tool for checking the unused swift codes
Install Periphery
Link You can install periphery tool using homebrew
Here is homebrew install command.
brew install peripheryapp/periphery/peripheryAnd then setup peripheryapp on your project
periphery scan --setup
Select your App’s target name. Don’t forget to save configuration to .periphery.yml
Check unused codes
You can see the results.
Make a script file to save result as text file
I recommend make a bash script file to save results as text file to keep track progress of reducing unused codes. Here is the bash script. (I changed ruby code (https://www.youtube.com/watch?v=2OQiCj-BG2o) to bash script)
#!/bin/bash
echo "🔍 start dead code analysis"
result="$(periphery scan --config .periphery.yml)"
current_dir=$(pwd)
result_stripped_of_absolute_path_prefix=$(echo "$result" | sed "s|$current_dir/||g")
filtered_out_result=$(echo "$result_stripped_of_absolute_path_prefix" | awk '/:[0-9]+:[0-9]+:/{ print }')
sorted_result=$(echo "$filtered_out_result" | sort)
result_with_removed_code_line_number=$(echo "$sorted_result" | sed "s|:[0-9]+:[0-9]+:|:|")
output=$(echo "$result_with_removed_code_line_number" | tr '\n' '\n' | sort)
echo "$output" > unused-codes.txt 2>&1
echo "🙌 done with dead code analysis"
I saved bash script file as check-unused-codes.sh
You can run bash script file by running sh check-unused.codes.sh in terminal (You can see the results of the unused codes)
Results will be saved into the unused-codes.txt
Reference
https://www.parasoft.com/blog/false-positives-in-static-code-analysis/
Shawn 