02-util.sh

   1 getv() {
   2     eval 'echo -n "$'"$1"'"'
   3 }
   4
   5 setv() {
   6     eval "${1}='$(echo -n "$2" | sed "s/'/'\\\\''/g")'"
   7 }
   8
   9 are_perms() {
  10     [ "$(stat -c '%a' "$2")" = "$1" ]
  11 }
  12
  13 # -m : print missing tools
  14 has_tools() {
  15     local missing
  16     local show=false
  17     for i in "$@"
  18     do
  19         if [ "$i" = '-m' ]; then
  20             show=true
  21         else
  22             command -v "$i" >/dev/null || missing="${missing} ${i}"
  23         fi
  24     done
  25     "$show" && echo -n $missing
  26     [ ! "$missing" ]
  27 }
  28
  29 check_tools() {
  30     local missing
  31     missing="$(has_tools -m "$@")" || fatal 1 "tool(s) missing to run this command:" -h "$missing"
  32 }
  33
  34 try() {
  35     local output
  36     output="$("$@")" \
  37         && { info_p success; [ "$output" ] && info -- "$output"; true; } \
  38         || { info_p failure; error -- "$output"; }
  39 }
  40
  41 push() {
  42     if [ $# -ge 2 ]; then
  43         local var="$1"
  44         shift
  45         local val="$(getv "$var")"
  46         if [ "$val" ]
  47             then setv "$var" "${val} ${@}"
  48             else setv "$var" "$@"
  49         fi
  50     fi
  51 }
  52
  53 contain() {
  54     local v="$1"
  55     shift
  56     for i in "$@"
  57     do
  58         [ "$i" = "$v" ] && return 0
  59     done
  60     false
  61 }