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   1 # Common helper routines for test shell scripts
   2 # -- intended to be sourced by them
   3
   4 test_skip()
   5 {
   6         WHY="$1"
   7         echo "Test $0 SKIP ($WHY)"
   8         exit 120
   9 }
  10
  11 # portable implementation of 'which' utility
  12 findprog()
  13 {
  14         FOUND=
  15         PROG="$1"
  16         IFS_SAVE="$IFS"
  17         IFS=:
  18         for D in $PATH; do
  19                 if [ -z "$D" ]; then
  20                         D=.
  21                 fi
  22                 if [ -f "$D/$PROG" ] && [ -x "$D/$PROG" ]; then
  23                         printf '%s\n' "$D/$PROG"
  24                         break
  25                 fi
  26         done
  27         IFS="$IFS_SAVE"
  28 }
  29
  30 require_prog()
  31 {
  32         if [ -z "$(findprog $1)" ]; then
  33                 test_skip "missing $1"
  34         fi
  35 }
  36
  37 # Some stuff for doing silly progress indicators
  38 progress_update()
  39 {
  40         test -t 1 || return 0   # supress progress meter if non-interactive
  41         THIS="$1"
  42         FIRST="$2"
  43         LAST="$3"
  44         RANGE="$(expr $LAST - $FIRST ||:)"
  45         PROG="$(expr $THIS - $FIRST ||:)"
  46         # this automatically rounds to nearest integer
  47         PERC="$(expr 100 \* $PROG / $RANGE ||:)"
  48         # note \r so next update will overwrite
  49         printf "%3d%%\r" $PERC
  50 }
  51
  52 progress_done()
  53 {
  54         test -t 1 || return 0   # supress progress meter if non-interactive
  55         printf "100%%\n"
  56 }