[Scons-users] Can't get Delete Action to delete a directory.

[William Deegan]

On 02/06/2013 09:02 PM, M Busche wrote:

> Bill,

>

> That didn't seem to help.  Same result.  Actually I'm now even more 

> confused because I don't understand why specifying Dir('$TARGET') as 

> the source doesn't produce a complaint about circular dependencies.

>

> Why does my test program work for a file but not for a directory?  Why 

> are they so different?


Directories (for SCons) by default depend on all their contents. So 
that's a non-trivial difference.


>

> No, I don't want Execute as I explain now.

>

> This problem is part of my effort to improve my bundler/packager which 

> you (and Gary) have helped me with before:  in an earlier posting to 

> this group (a week or two ago) you'll note that I was asking how to 

> run a Mkdir command without any sources. That now works just fine.  

> But to do things right I also need to be able to remove a directory.

>

> The specific scenario is as follows.

>

> 1) I have an empty directory named "out" in my source code directory 

> structure that I want to copy to my software distribution directory 

> for bundling.  (Perhaps it's an output directory for test programs or 

> something -- whatever.)

> 2) I run scons and the distribution directory gets created including 

> this directory named "out".

> 3) Now I decide I don't like the name "out" and rename it "output" in 

> my source code directory tree.

> 4) I run scons again and the new directory "output" gets created, but 

> the packager also recognizes that the directory "out" is no longer 

> needed and so wants to delete it.  I'm trying to issue a command to 

> delete this directory.  I guess I could use Excute, but this operation 

> is REALLY part of the software distribution generation step and 

> shouldn't be run until all unit tests have completed.  I've got that 

> dependency working for everything else by issuing the single directory 

> level dependency:

Seems like the best way to avoid this is to clean the packaging 
directory and recreated it?


>

> Depends(Dir("dist"), Dir("test"))

>

> Because the Delete target is a directory under "dist", I would expect 

> this delete directory request to also be made appropriately contingent 

> upon the successful build of all targets under directory "test" by the 

> above dependency declaration.





-Bill


>

> I hope that helps.

>

> Matt

>

>

> ------------------------------------------------------------------------

> *From:* William Deegan <bill at baddogconsulting.com>

> *To:* scons-users at scons.org

> *Sent:* Wednesday, February 6, 2013 9:13 PM

> *Subject:* Re: [Scons-users] Can't get Delete Action to delete a 

> directory.

>

> Matt,

>

>

> On 02/06/2013 04:13 PM, M Busche wrote:

>> I was still hoping for some help with this.

>>

>> Is my Ubuntu command line capture incomprehensible?  The trace below 

>> shows how a 2-line SConstruct file will remove a simple file, but not 

>> a directory.  I don't get it.

>

> Likely the issue is the source you specify for the command.

> It's always up to date, thus:

>

>     $ scons -Q tgt=bar

>     scons: `.' is up to date.

>

> t = Command(tgt, [], [Delete("$TARGET")])

>

> Perhaps try:

>

> t = Command(tgt,Dir('$TARGET'),[Delete("$TARGET"))

>

> Though this logic is a bit curious, what are you trying to do?

> Perhaps you really want to use Execute()?

>

> -Bill

>

>

>>

>> Thanks for any insight you can offer into this unexpected behavior.

>>

>> Matt

>>

>>

>> ------------------------------------------------------------------------

>> *From:* M Busche <spammymatt94 at yahoo.com> <mailto:spammymatt94 at yahoo.com>

>> *To:* "scons-users at scons.org" <mailto:scons-users at scons.org> 

>> <scons-users at scons.org> <mailto:scons-users at scons.org>

>> *Sent:* Friday, February 1, 2013 10:30 PM

>> *Subject:* [Scons-users] Can't get Delete Action to delete a directory.

>>

>> Here's my very simple test:

>>

>> $ ls -a

>> .  ..  SConstruct

>> $ cat SConstruct

>> tgt = ARGUMENTS.get('tgt', '')

>> t = Command(tgt, [], [Delete("$TARGET")])

>> $ touch foo

>> $ ls -a

>> .  ..  foo  SConstruct

>> $ scons -Q tgt=foo

>> Delete("foo")

>> $ ls -a

>> .  ..  .sconsign.dblite  SConstruct

>> $ mkdir bar

>> $ scons -Q tgt=bar

>> scons: `.' is up to date.

>> $ ls -a

>> .  ..  bar  .sconsign.dblite  SConstruct

>> $

>>

>> I must be missing something.  Can someone explain why Delete won't 

>> delete directory bar when the man page clearly states that the Delete 

>> factory works for both files and directory trees?

>>

>> Thanks,

>> Matt

>>

>

>

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