[Scons-users] Command fails if action is simply $SOURCE

[William Deegan]

On Feb 28, 2013, at 11:11 AM, Carnë Draug <carandraug+dev at gmail.com> wrote:


> On 28 February 2013 18:56, William Deegan <bill at baddogconsulting.com> wrote:

>> On Feb 28, 2013, at 10:15 AM, Carnë Draug <carandraug+dev at gmail.com> wrote:

>>> I'm trying to set a bunch of scripts as commands which are then

>>> grouped as a single target with Alias. I'm doing something like this

>>> 

>>> analysis1 = env.Command(target = "result1", source = "script1.pl",

>>> action = "$SOURCE")

>>> analysis2 = env.Command(target = "result2", source = "script2.pl",

>>> action = "$SOURCE")

>>> analysis3 = env.Command(target = "result3", source = "script3.pl",

>>> action = "$SOURCE")

>>> 

>>> env.Alias("analysis", [analysis1, analysis2, analysis3])

>>> 

>>> 

>>> However, this fails. All I get is:

>>> 

>>> $scons analysis

>>> scons: Reading SConscript files ...

>>> scons: done reading SConscript files.

>>> scons: Building targets ...

>>> scons: done building targets.

>>> 

>>> I can make SCons run the scripts if I set the action to "./$SOURCE",

>>> "perl $SOURCE", "$SOURCE --" or anything like that. The files should

>>> have the correct permissions (744). Even if I set $SOURCE to a path, I

>>> get the same problem so shouldn't be a matter of adding anything to

>>> the search path.

>>> 

>>> Is this a bug in SCons or am I doing something wrong? And is there a

>>> better way to do this?

>> 

>> Try: "scons --debug=explain analysis"

> 

> This shows me that SCons recognizes the target as something to build

> but then does nothing about it:

> 

> $ scons --debug=explain analysis

> scons: Reading SConscript files ...

> scons: done reading SConscript files.

> scons: Building targets ...

> scons: building `result1' because it doesn't exist

> scons: building `result2' because it doesn't exist

> scons: building `result3' because it doesn't exist

> scons: done building targets.

> 

> Nothing is done with the scripts. Just for test, I made the scripts to

> just print something, or give an error but nothing happens ever.

> 

>> Also can you paste the output from:

>> scons --tree=prune analysis

> 

> scons: Reading SConscript files ...

> scons: done reading SConscript files.

> scons: Building targets ...

> +-analysis

>  +-result1

>  | +-scripts/script1.pl

>  +-result2

>  | +-scripts/script2.pl

>  +-result3

>    +-scripts/script3.pl

> scons: done building targets.

> 

> I have attached a tarball with the example, for ease of replication.

> 

> I have tried to pass the path for the scripts with os.path.join() and

> os.path.abspath() but none worked.


Try:
analysis3 = env.Command(target = "result3", source = "script3.pl", action = "${SOURCE.abspath}")

?
-Bill