lib/log.sh

   1 #!/bin/sh
   2
   3 export TERM=${TERM:-linux}
   4 readonly tput_rev=${nocolor:-$(tput rev)}
   5 readonly tput_sgr0=${nocolor:-$(tput sgr0)}
   6 readonly tput_bold=${nocolor:-$(tput bold)}
   7 readonly tput_setaf_0=${nocolor:-$(tput setaf 0)}
   8 readonly tput_setaf_1=${nocolor:-$(tput setaf 1)}
   9 readonly tput_setaf_2=${nocolor:-$(tput setaf 2)}
  10 readonly tput_setaf_3=${nocolor:-$(tput setaf 3)}
  11
  12 info () {
  13         local -
  14         set +x
  15         printf >&2 "%sINFO%s" "$tput_setaf_2" "$tput_sgr0"
  16         local comment="$1"
  17         shift
  18         local var
  19         for var in "$@"
  20          do
  21                 local val="$(eval printf %s "\"\${$var:-}\"" || false)" || false
  22                 printf >&2 ": %s%s%s=%s%s%s" "$tput_bold$tput_setaf_0" "$var" "$tput_sgr0" "$tput_bold$tput_setaf_0" "$val" "$tput_sgr0"
  23          done
  24         printf >&2 ": %s%s%s\n" "$tput_rev" "$comment" "$tput_sgr0"
  25  }
  26 warn () {
  27         local -
  28         set +x
  29         printf >&2 "%sWARNING%s" "$tput_setaf_3" "$tput_sgr0"
  30         local comment="$1"
  31         shift
  32         local var
  33         for var in "$@"
  34          do
  35                 local val="$(eval printf %s "\"\${$var:-}\"" || false)" || false
  36                 printf >&2 ": %s%s%s=%s%s%s" "$tput_bold$tput_setaf_0" "$var" "$tput_sgr0" "$tput_bold$tput_setaf_0" "$val" "$tput_sgr0"
  37          done
  38         printf >&2 ": %s%s%s" "$tput_rev" "$comment" "$tput_sgr0"
  39         local x
  40         if ! [ ${WARNING_CONTINUE:+set} ]
  41          then
  42                 printf >&2 " (press Enter to continue)"
  43                 read x
  44          else
  45                 printf >&2 "\n"
  46          fi
  47  }
  48 error () {
  49         local -
  50         set +x
  51         printf >&2 "%sERROR%s" "$tput_setaf_1" "$tput_sgr0"
  52         local errno="$1"
  53         local comment="$2"
  54         shift 2
  55         local var
  56         for var in "$@"
  57          do
  58                 local val="$(eval printf %s "\"\${$var:-}\"" || false)" || false
  59                 printf >&2 ": %s%s%s=%s%s%s" "$tput_bold$tput_setaf_0" "$var" "$tput_sgr0" "$tput_bold$tput_setaf_0" "$val" "$tput_sgr0"
  60          done
  61         printf >&2 ": %s%s%s\n" "$tput_rev" "$comment" "$tput_sgr0"
  62         exit $errno
  63  }
  64 assert () {
  65         local -
  66         set +x
  67         local eval="$1"; shift
  68         local type="assertion failure"
  69         eval "$eval" ||
  70         error $? "$eval" type "$@"
  71  }