[GRASS-dev] python scripts in grass6

[Glynn Clements]

Martin Landa wrote:

> currently in GRASS 6 PGM variable must be set including python file
> extension, in GRASS 7 not, e.g.
> 
> PGM=v.krige.py in GRASS6
> PGM=v.krige in GRASS7
> 
> Would be possible to change building system in GRASS 6 to unify it with GRASS 7.

GRASS 7 now *only* allows Python scripts, so I don't think you want to
unify it quite that far.

The main issue is that, on Windows, make needs to know whether it's
supposed to be creating $(SCRIPTDIR)/$(PGM).py or
$(SCRIPTDIR)/$(PGM).sh. Once you know what the target is, it's easy
enought to create it.

The problem doesn't exist on Unix, as you always want to create
$(SCRIPTDIR)/$(PGM); you can just provide multiple rules to create it
from either %.py or %, and make will use whichever is available.

Actually, if you use $(BIN)/$(PGM).bat as the ultimate target, you can
then add two rules to create that from either $(SCRIPTDIR)/$(PGM).py
or $(SCRIPTDIR)/$(PGM).sh, i.e.:

	ifdef MINGW
	script: $(BIN)/$(PGM).bat
	else
	script: $(SCRIPTDIR)/$(PGM)
	endif
	
	$(BIN)/%.bat: $(SCRIPTDIR)/%.py
		# generate .bat file to run .py file
	
	$(BIN)/%.bat: $(SCRIPTDIR)/%.sh
		# generate .bat file to run .sh file
	
	$(SCRIPTDIR)/%.py: %.py
		$(INSTALL) $< $@
	
	$(SCRIPTDIR)/%.sh: %
		$(INSTALL) $< $@
	
	$(SCRIPTDIR)/%: %.py
		$(INSTALL) $< $@
	
	$(SCRIPTDIR)/%: %
		$(INSTALL) $< $@

-- 
Glynn Clements <glynn at gclements.plus.com>