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
  16 # This file is exactly the same as logq-function except the last line
  17 # to make it into a script.
  18 logq () {
  19   local help="Usage: logq [-h|--help] COMMAND [ARG...]
  20
  21 Log to temp file, output tail of log in case of error.
  22
  23 Run COMMAND with ARGs. Output return code, command, and log path. Tail
  24 log if there is a failure.  Follows output format of logsave."
  25
  26   if [[ $1 == --help || $1 == -h ]]; then
  27     echo "$help"
  28     return
  29   fi
  30   if [[ $# == 0 ]]; then
  31     echo "error: need 1 or more arguments
  32 $help"
  33     return 1
  34   fi
  35
  36   # deliniate arguments, so spaces aren't ambiguous
  37   local index=0
  38   local x prettycommand
  39   for x in "$@"; do
  40     prettycommand+="[$index]$x "
  41     index=$(( index+1 ))
  42   done
  43
  44   local file="$*"
  45   file="$(mktemp -d)/${file//[[:space:]\/]/_}"
  46   # give us ~20 char filename max
  47   file="${file:0:40}"
  48
  49   printf "%s\n%s\n\n" "Log of $prettycommand" "$(date)" >"$file"
  50
  51   if [[ $- != *x* ]]; then
  52     echo "log $file = $@"
  53   fi
  54
  55   # we will propagate any errors
  56   local logq_ret=$(
  57     set +e
  58     trap ERR
  59     "$@" &>> "$file"
  60     echo $?
  61         )
  62   printf "\n%s\n%s\n" "$(date)" "----------------" >> "$file"
  63
  64   if [[ $logq_ret != 0 ]]; then
  65     x="tail -n 100 $file"
  66     if [[ $- != *x* ]]; then
  67       echo "logq failure. $x :"
  68     fi
  69     $x
  70   fi
  71   return $logq_ret
  72 }
  73 logq "$@"