[tex-k] epstopdf not usable in Git Bash for Windows

[Yukai Chou]

Hi all,

When invoked in Git Bash for Windows, epstopdf failed with

  epstopdf ($Id: epstopdf.pl 68289 2023-09-15 22:17:54Z karl $) 2.33
  !!! Error: Required program kpsewhich not found in PATH (<full content of
PATH>)

It seems the cause is, in Git Bash the path separator in PATH is unix-like
colon (:), not win-like semicolon (;), but epstopdf still tries to split
PATH using semicolon in `sub check_prog_exists`. Related source lines in
epstopdf

  # not absolute, check path
  for my $dir (split ($on_windows ? ";" : ":", $ENV{"PATH"})) {
    $dir = "." if $dir eq ""; # empty path element
    debug " Checking dir $dir";
    if (-x "$dir/$prog") {
      return 1;
    } elsif ($on_windows_or_cygwin) {
      for my $ext (@w_ext) {
        return 1 if (-x "$dir/$prog.$ext");
      }
    }
  }

Steps to reproduce the problem:

  # get an eps provided by mwe package
  cp $(kpsewhich example-image.eps) .
  epstopdf --debug example-image.eps

This is first reported and discussed in
https://github.com/teatimeguest/setup-texlive-action/issues/292.

best regards,
Yukai
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