Remove trailing empty newline from rendered multi-line strings

[tgdfool2]

Hi All,

Is there an easy way to remove the trailing empty newline that is added in multi-line strings?

Given the following code:

local script = |||
  case "$ver" in
    %(current)s)
      echo "Same"
      exit 0
      ;;
    %(upgrade)s
    *)
      echo "Wrong"
      exit 2
      ;;
  esac
|||;

script % {
  current: '10',
  target: '20',
  upgrade: (if $.current != '20' then
  |||
    %(target)s)
        echo "Different"
        exit 1
        ;;
  ||| % { current: $.current, target: $.target } else ''),
}

It produces the following output:

case "$ver" in
  10)
    echo "Same"
    exit 0
    ;;
  20)
    echo "Different"
    exit 1
    ;;

  *)
    echo "Wrong"
    exit 2
    ;;
esac

I would like to get rid of the empty line that was added between the 20 and * cases. Is there an easy way to do this?

Thanks in advance for your help!

[sparkprime]

The best way right now is probably to write a function that strips the trailing newline and call that around the |||.

Related FRs:

#289
#915

[tgdfool2]

Thanks for your answer and your hint :-). This one did the trick:

  upgrade: (if $.current != '2.0' then
    std.rstripChars(|||
      %(target)s)
          echo "Different"
          exit 1
          ;;
    ||| % { current: $.current, target: $.target }, '\n') else ''),

[vergenzt]

FYI for those following I implemented a "chomped multiline string" syntax in a PR at #1175. Would love some feedback on it and/or to get it merged! 🙂