[Rd] bash help please

[Duncan Murdoch]

On 9/6/2005 10:56 AM, Duncan Murdoch wrote:
> I'd like to make MikTeX the default TeX package in 2.2.0, but we still 

I forgot to say "in Windows".  Sorry.

> need to let people use other packages.  The problem is that MikTeX wants 
> a command line option --include-directory $R_HOME/share/texmf, while 
> other packages specify includes via environment variables, and barf when 
> they see the unexpected option.
> 
> The choice should be controlled by the user's settings in the MkRules 
> file.  For example, I'll put something like this there:
> 
> ifneq ($(strip $(BUILD)),CROSS)
> # Define to use MikTeX
> #
> PDFLATEX = pdflatex --include-directory=$(RHOME)/share/texmf
> LATEX = latex --include-directory=$(RHOME)/share/texmf
> PDFTEX = pdftex --include-directory=$(RHOME)/share/texmf
> TEX = tex --include-directory=$(RHOME)/share/texmf
> #
> # Define to use other TeX
> #
> # PDFLATEX = pdflatex
> # LATEX = latex
> # PDFTEX = pdftex
> # TEX = tex
> else
> PDFLATEX = pdflatex
> LATEX = latex
> PDFTEX = pdftex
> TEX = tex
> endif
> 
> My problem is that I don't know enough about Bourne shell scripting and 
> GNU make to have this affect Rd2dvi (and possibly other Rcmd commands, I 
> haven't looked yet).
> 
> Specifically, we need to have Rd2dvi.sh import these definitions from 
> src/gnuwin32/MkRules, which may have been edited by the user since 
> Rd2dvi.sh was built.  A complication is that if the user has already 
> defined environment variables named PDFLATEX, LATEX, etc, we don't want 
> to overwrite them.
> 
> One way would be to tell users to rebuild Rd2dvi.sh.  However, it would 
> be easier if Rd2dvi.sh could import the changes automatically.
> 
> I was thinking of putting something like this into Rd2dvi.sh:
> 
> if test ${R_HOME}/src/gnuwin32/MkRules -nt ${R_HOME}/bin/setTeXenv.sh; then
>    make -f ${R_HOME}/src/gnuwin32/Makefile ${R_HOME}/bin/setTeXenv.sh
> fi
> sh setTeXenv.sh
> 
> and then have the Makefile build the setTeXenv.sh script--but what 
> should it contain?  Alternatively, can GNU make export environtment 
> variables directly, and skip creating this new script?
> 
> Advice from shell hackers is welcomed!
> 
> Duncan Murdoch
> 
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