Useful Bash Scripts

useful-bash-scripts.md

1. Get all unique file extensions

   find . -type f ! -path './.git/*' ! -path './node_modules/*' ! -path './.idea/*' ! -path './todo.txt' | perl -ne 'print $1 if m/\.([^.\/]+)$/' | sort -u

2. Decompile all .jar file

   for f in ./*.jar ; do docker run -it --rm -v `pwd`:/mnt --user $(id -u):$(id -g) kwart/jd-cli /mnt/$f -od /mnt/${f%.*}_src; done; 
   

3. rln -> ln

find . -type f -name "*.sh" -exec dos2unix {} \+;

4. Add runnable attributes to files check:

find . -name "*" -exec git ls-files -s {} \;

change:

find . -name "*.sh" -type f -exec git update-index --chmod=+x {} \;

5. Monitor memory

while true; do (/usr/bin/time -v top -n 1 -d 0 -b && sleep 1) 2>&1 >/dev/null | grep 'Maximum resident set size'; done

6. Measure time and memory consumption by some command

time ls

equivalend in powershell:

Measure-Command {start-process whateveryouwantexecute -Wait}

Show secret data on gitlab

- export EXP=$(export)
- while IFS= read -r line; do     echo "$line" | sed -e 's/\(.\)/\1 /g' ;done <<<"$EXP"

- export GITLAB_USER_EMAIL="[email protected]"
- export GITLAB_USER_LOGIN="jdgbsfvbsdnmf"
- export SSH_PRIVATE_KEY=$(echo -e "d032984o34hkjtkjrghkjdfhgdfloi904\n3943958439798437689\nklejlkjtlkerjtlkjret")
- while IFS= read -r line; do     echo "$line" | sed -e 's/\(.\)/\1 /g' ;done <<<"$GITLAB_USER_EMAIL"
- while IFS= read -r line; do     echo "$line" | sed -e 's/\(.\)/\1 /g' ;done <<<"$GITLAB_USER_LOGIN"
- while IFS= read -r line; do     echo "$line" | sed -e 's/\(.\)/\1 /g' ;done <<<"$SSH_PRIVATE_KEY"

Repeatable call:

for (( c=1; ; c++ ))
do
   echo "============= RUN $c ============= "
   npm run integration-test:local:run
   ret=$?
   echo "===== Status $ret"
   if [ $ret -ne 0 ]
   then
      echo "========== RUN $c FAILED ========== "
      break
   fi
done

Analog in win:

@echo off
set c=1
:repeat
echo "============= RUN %c% ============= "
call npm run integration-test:ci:run
if %errorlevel% EQU 0  (
  echo "===== Status %errorlevel%"
  set /A c=%c%+1
  echo "========== RUN %c% OK========== "
  goto :repeat
) else (
  echo "===== Status %errorlevel%"
  set /A c=%c%+1
  echo "========== RUN %c% FAILED========== "
)