Shell snippets

shell_snippets.sh

## copy all *.example files usable files
for ex in config/*.yml.example(:t:r) do
[[ -a config/${ex} ]] || cp config/${ex}.example config/${ex}
done

# it updates _just_ one gem and uses the specified Gemfile
BUNDLE_GEMFILE=Gemfile.other bundle update --source awesome_gem

# do a loop task with a progressbar
events=4000; 
word="####################################################################################################"; 
for ((i = 1; i <= $events; i++)) do 
pct=`echo "a = $i/$events*100; scale=0; a/1+1" | bc -l`; 
printf "%3d [%*s] %4d\n" $pct -100.100 $word[1,$pct] $i; 
# some expensive task here
sleep 0.5; 
done

# load environment variables from .env and run a command
env $(cat .env | xargs) rails