[luatex] Problem building 0.50.0 (and trunk)

[Reinhard Kotucha]

On 8 January 2010 Norbert Preining wrote:

 > On Fr, 08 Jan 2010, Reinhard Kotucha wrote:
 > >  > I doubt "which" is sufficiently portable, given that we're already
 > >  > talking about systems that don't have /bin/bash.
 > > 
 > > We have a function called "which" already in tlpkg/TeXLive/TLUtils.pm.
 > 
 > That does not help, if you missed it, we are talking about the build
 > system of TeX Live, not the installation. And there we are in sh world,
 > not perl world.

Sure, but it's not difficult to port it to sh.  I mentioned this
function in order to allow you to estimate the required effort.

The script below should work on Cygwin and MinGW too, though I can
test it only on Linux.  It's very likely that it still contains bugs.
It expects config.guess in the current directory (can be copied from
tlpkg/installer/).

Regarding "test -x", I don't have access to a Windows machine, but as
far as I remember, Cygwin supports Unix file permissions natively and
MinGW regards everything as executable which has the extension ".exe".
Hope it works as expected.

Regards,
  Reinhard

------------------------------------------------------------------------
#! /bin/sh

SYS_ID=`./config.guess`
SAVED_IFS=$IFS # We have to restore IFS when we are finished.

# which() expects a program name as an argument (without extension).
# Return value is 0 if the program was found in PATH and 1 otherwise.
# If the program was found in PATH, the variable PROG contains the name 
# of the program preceded by the first element of PATH where the program 
# was found.  Don't use PROG unless the return value is 0.

which () {
    prog="$1"
    if echo $SYS_ID | egrep "(mingw|cygwin)"; then
	prog="$1.exe"
    fi  

    if echo $SYS_ID | grep "mingw"; then
	IFS=';'
    else
	IFS=:
    fi

    for p in $PATH; do 
	if [ -x "$p/$prog" ]; then 
	    PROG="$p/$prog"; 
	    IFS=$SAVED_IFS; 
	    return 0
	fi 
    done
    IFS=$SAVED_IFS
    return 1
}

# Example Code:

echo "System: $SYS_ID"

if which bash; then
    echo $PROG
else
    echo "No bash in $PATH"
fi
------------------------------------------------------------------------

-- 
----------------------------------------------------------------------------
Reinhard Kotucha			              Phone: +49-511-3373112
Marschnerstr. 25
D-30167 Hannover	                      mailto:reinhard.kotucha at web.de
----------------------------------------------------------------------------
Microsoft isn't the answer. Microsoft is the question, and the answer is NO.
----------------------------------------------------------------------------