prefix command output in bash
When I write scripts that call other programs, like to prefix their output for the user to make it easier to see what's going on. There's a pretty simple way to do this with perl:
prefix_echo () {
perl -sne '$|=1; print "[$pre]\t$_"' -- -pre="1ドル"
}
# usage
long_command "1" "2" | prefix_echo "long_command"
# example output
[long_command] run completed in 0.2s
[long_command] run completed in 0.8sWritten by Nick Jacob
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