iankelling.org Git - log-quiet/blob - logq-function

   1 #!/bin/bash
   2 logq () {
   3     local help="Usage: logq [-h|--help] COMMAND [ARG...]
   4
   5 Log Quietly. Run COMMAND with ARGs, log to temp file. Output return code,
   6 command, and log path. Tail log if there is a failure.
   7 Follows output format of logsave."
   8
   9     if [[ $1 == --help || $1 == -h ]]; then
  10         echo "$help"
  11         return
  12     fi
  13     if [[ $# == 0 ]]; then
  14         echo "error: need 1 or more arguments
  15 $help"
  16         return 1
  17     fi
  18
  19     # deliniate arguments, so spaces aren't ambiguous
  20     local index=0
  21     local x prettycommand
  22     for x in "$@"; do
  23         prettycommand+="[$index]$x "
  24         index=$(( index+1 ))
  25     done
  26
  27     local file="$*"
  28     file="$(mktemp -d)/${file//[[:space:]\/]/_}"
  29     # give us ~20 char filename max
  30     file="${file:0:40}"
  31
  32     printf "%s\n%s\n\n" "Log of $prettycommand" "$(date)" >"$file"
  33
  34     if [[ $- != *x* ]]; then
  35         echo "log $file = $@"
  36     fi
  37
  38     # we will propagate any errors
  39     local logq_ret=$(
  40         set +e
  41         trap ERR
  42         "$@" &>> "$file"
  43         echo $?
  44           )
  45     printf "\n%s\n%s\n" "$(date)" "----------------" >> "$file"
  46
  47     if [[ $logq_ret != 0 ]]; then
  48         x="tail -n 100 $file"
  49         if [[ $- != *x* ]]; then
  50             echo "logq failure. $x :"
  51         fi
  52         $x
  53     fi
  54     return $logq_ret
  55 }