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

   1 #!/bin/bash
   2 # Copyright (C) 2014-2016 Ian Kelling
   3
   4 # Licensed under the Apache License, Version 2.0 (the "License");
   5 # you may not use this file except in compliance with the License.
   6 # You may obtain a copy of the License at
   7
   8 #     http://www.apache.org/licenses/LICENSE-2.0
   9
  10 # Unless required by applicable law or agreed to in writing, software
  11 # distributed under the License is distributed on an "AS IS" BASIS,
  12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13 # See the License for the specific language governing permissions and
  14 # limitations under the License.
  15 logq () {
  16     local help="Usage: logq [-h|--help] COMMAND [ARG...]
  17
  18 Log to temp file, output tail of log in case of error.
  19
  20 Run COMMAND with ARGs. Output return code, command, and log path. Tail
  21 log if there is a failure.  Follows output format of logsave."
  22
  23     if [[ $1 == --help || $1 == -h ]]; then
  24         echo "$help"
  25         return
  26     fi
  27     if [[ $# == 0 ]]; then
  28         echo "error: need 1 or more arguments
  29 $help"
  30         return 1
  31     fi
  32
  33     # deliniate arguments, so spaces aren't ambiguous
  34     local index=0
  35     local x prettycommand
  36     for x in "$@"; do
  37         prettycommand+="[$index]$x "
  38         index=$(( index+1 ))
  39     done
  40
  41     local file="$*"
  42     file="$(mktemp -d)/${file//[[:space:]\/]/_}"
  43     # give us ~20 char filename max
  44     file="${file:0:40}"
  45
  46     printf "%s\n%s\n\n" "Log of $prettycommand" "$(date)" >"$file"
  47
  48     if [[ $- != *x* ]]; then
  49         echo "log $file = $@"
  50     fi
  51
  52     # we will propagate any errors
  53     local logq_ret=$(
  54         set +e
  55         trap ERR
  56         "$@" &>> "$file"
  57         echo $?
  58           )
  59     printf "\n%s\n%s\n" "$(date)" "----------------" >> "$file"
  60
  61     if [[ $logq_ret != 0 ]]; then
  62         x="tail -n 100 $file"
  63         if [[ $- != *x* ]]; then
  64             echo "logq failure. $x :"
  65         fi
  66         $x
  67     fi
  68     return $logq_ret
  69 }
  70 logq "$@"