Alert after long running shell script

bashnotifications

When I have wait for slow commands (operations on large databases for example), I start doing something else and often don't notice for a long time that it has finished, wasting valuable time. I am looking for a way for the shell to alert me (by which I mean, run some custom command which I can determine) when a command which has been running for more than X seconds has finished and I got back the prompt.

I am using Bash, but solutions for other shells would be interesting as well.

Best Answer

This script, if put in your .bashrc, will execute any command you like whenever the prompt returns after a long time executing a command - customize the "long time" (after the -gt) in seconds, and within the curly braces on the same line you can execute whichever commands you like. You could even send yourself an email with the Host on which this occured and the last executed command and its status code.

beep_if_long_time_past() {
    LAST_COMMAND_DURATION=$(($(date +%s) - ${LAST_COMMAND_TIME}))
    [[ ${LAST_COMMAND_DURATION} -gt 60 ]] && { echo "Took long, didn't it?" ; notify-send "I'm done after ${LAST_COMMAND_DURATION} seconds!"; }
    export LAST_COMMAND_TIME=
}

export PROMPT_COMMAND=beep_if_long_time_past
trap '[ -z ${LAST_COMMAND_TIME} ] && export LAST_COMMAND_TIME=$(date +%s)' DEBUG

Related Solutions

Bash: execute command given in commandline and don’t exit

I seem to have found a way to solve this so that the job control works:

bash --rcfile <(cat ${HOME}/.bashrc; echo 'export PROMPT_COMMAND="vim; export PROMPT_COMMAND="') -i

This creates custom bashrc file on the fly and uses PROMPT_COMMAND variable to delay the Vim start so that job control should work. This of course can be generalized to not be Vim specific.

Ok, just tested this with terminator and at least seems to work with config file:

[profiles]
[[default]]
    use_custom_command = True
    custom_command = "bash --rcfile <(cat ${HOME}/.bashrc; echo 'export PROMPT_COMMAND="vim; export PROMPT_COMMAND="') -i"

How to ‘source’ a shell script using bash from zsh

You could put your compilation commandline in a bash script, which sources the compilation scripts bevor executing the compilation command.

Something like

    #!/bin/bash
    . /path/to/environmentscript
    . /path/to/morefunctionsscript

    compile_command

Then instead of invoking compile_command by hand, you just invoke your new bash script.

Best Answer

Related Solutions

Bash: execute command given in commandline and don’t exit

How to ‘source’ a shell script using bash from zsh

Related Question