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Re: bug in texi2dvi, on Windows/Msys2 it cannot find tex


From: Tomas Kalibera
Subject: Re: bug in texi2dvi, on Windows/Msys2 it cannot find tex
Date: Fri, 8 Apr 2022 15:53:31 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0


On 4/8/22 15:31, Gavin Smith wrote:
On Fri, Apr 08, 2022 at 03:15:01PM +0200, Tomas Kalibera wrote:
What happens if we don't set MSYSTEM at all?

diff --git a/util/texi2dvi b/util/texi2dvi
index 1f42b41907..c506bbad37 100755
--- a/util/texi2dvi
+++ b/util/texi2dvi
@@ -85,7 +85,7 @@ IFS="$space$tab$newline"
   # Msys. It is safer to use OSTYPE, this is why we set MSYSTEM to
   # $OSTYPE before calling uname
   if test -n "$COMSPEC$ComSpec" \
-   && MSYSTEM=$OSTYPE uname | $EGREP -iv 'cygwin|msys' >/dev/null; then
+   && uname | $EGREP -iv 'cygwin|msys' >/dev/null; then
     path_sep=";"
   else
     path_sep=":"
It works with Msys2 and cygwin for me, but breaks with MSYSTEM, where
What is MSYSTEM?  Is this the original msys?

$ uname
MINGW32_NT-6.2

$ MSYSTEM=$OSTYPE uname
msys_NT-6.2

$ uname -a
MINGW32_NT-6.2 DESKTOP-G858KME 1.0.19(0.48/3/2) 2016-07-13 17:45 i686 Msys
Does the path separator need to be set to ; on this system?  Is anybody
likely to be running texi2dvi from it?

Are you sure that MSYSTEM is set up correctly?  Is the MSYSTEM envvar
set to something else, or just not set at all?

This is a completely clean installation using mingw-get which I downloaded from https://sourceforge.net/projects/mingw/files/Installer/, without any manual configuration. I've also installed a clean installation of cygwin, for the same reason. Normally I use Msys2.

Would this be an acceptable fix? (turn OSTYPE to uppercase when setting MSYSTEM)

   MSYSTEM=$(echo $OSTYPE | tr [a-z] [A-Z]) uname | $EGREP -iv 'cygwin|msys' >/dev/null; then

It was suggested by Markus Mützel in a downstream discussion (Msys2) and it works for me in Msys2, cygwin and the installation I described which I believe is what MSYSTEM refers to in texi2dvi source (but I am not sure). On all these systems, the path separator needs to be ":".

The downstream discussion with some more detail is here: https://github.com/msys2/MSYS2-packages/issues/2901

Thanks
Tomas





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