[Scons-users] Setting environment variables for scons to use globally on my system

[Russel Winder]

On Thu, 2014-05-15 at 04:31 -0500, Benjamin Lindley wrote:

> That will probably help, if I can figure out one more thing. This is 

> more of a Python question though, so sorry if it's off topic (but maybe 

> there's a scons specific answer). I guess I need to figure out how (if 

> it's even possible) to change the default arguments to the Environment 

> constructor. So, for example, if the SConstruct file has this:

> 

> env = Environment()

> 

> I want it to be as if it says this:

> 

> env = Environment(tools = ['mingw'])

> 

> Thanks for the help.


You are probably looking at having a "feature variable". I am not a fan
of command line options when working with SCons, so I tend to write in a
local.build.scons file (or some such)

local.build.scons:

	tool_chooser = False

Then in the SConstruct:

	tool_chooser = True

	with open('local.build.scons') as f:
	    exec(f.read().strip())

	…

	if tool_chooser:
	    env = Environment(tools = ['mingw'])
	else:
	    env = Environment()

then the SConstruct is programmed with the options and a default, and
the local file contains the selector that needs to be edited.

It's not a great solution, but it works.

-- 
Russel.
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