[Scons-users] Starting with a clean installation directory

[Dirk Bächle]

Pico,

On 21.10.2013 21:22, Pico Geyer wrote:

>

>

>

> [...]

>

>     I think you're looking for

>

>       Execute(Delete('../install_dir'))

>

>     which removes the folder at the time when the SConscript is read

>     in, and not during the Build process like for Command().

>     Please, also have a look in the UserGuide, "12.7. Executing an

>     action immediately: the Execute Function".

>

>

> Dirk, Thanks for the response.

> However that's not quite what I'm looking for.

> Perhaps it was not well illustrated by my simple example.

> Let say my build also contained a build of a program bar, I don't want 

> my installation directory to be deleted just because I tried to build bar.

> If however I delete foo.txt from my build and then I run the install 

> target, I don't want to see foo.txt in the install directory.

>

> So I actually do want the delete target to be a dependency of any of 

> the install targets. I'm just not sure how to achieve that.

>


okay here's my next guess:

   if 'install' in BUILDTARGETS:
     Execute(Delete('../install_dir'))

   env = Environment()
   t_all_install = []
   t_all_install.append(env.Install('../install_dir', 'foo2.txt'))
   t_all_install.append(env.Install('../install_dir', 'foo.txt'))
   env.Alias('install', t_all_install)
   env.Default('install')

Like this, whenever you try to build the target (alias) 'install' the 
folder gets removed completely.
Is this closer to what you actually want?

Regards,

Dirk


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