[Scons-users] Copying and merging directories

[Peter Steele]

The thing that's a little different in our model is that we ultimately just
want to blow away whatever files had been previously code generated and
replace them with the new set. So the install operation should always
happen, 100% of the time. The SConstruct script I have handles the build and
codegen phases fine. The difficulty I'm having is trying to get the copy
phase to run reliably, at least via Install. Using explicit cp operations
via Command though seems to be working well.

-----Original Message-----
From: scons-users-bounces at scons.org [mailto:scons-users-bounces at scons.org]
On Behalf Of William Deegan
Sent: Tuesday, September 11, 2012 11:38 AM
To: SCons users mailing list
Subject: Re: [Scons-users] Copying and merging directories

Peter,

Try: 
scons --tree=prune

This will show you the dependencies that SCons "knows" about.
Specifically look at the install tree your construction.

You could put the following in to debug what your glob is returning you.

nodes=Glob(C_FROM_DIR+'/fw')
for n in nodes:
	print "NODE:%s"%str(n)
You might want to use env.Glob() instead of plain Glob.

Is it safe to assume that TOT doesn't point to a subdirectory of the
directory where you run SCons and/or SConstruct resides?

-Bill
On Sep 10, 2012, at 6:33 AM, "Peter Steele" <pwsteele at gmail.com> wrote:


> Okay, I've got a basic test copy/install working, but after putting it 

> all together with my full SConstruct file, I'm getting behaving I 

> don't quite understand. Here's my full script, which I've modeled 

> after my original ant

> script:

> 

>    import os

> 

>    TOT = os.environ["TOT"]

>    CLASSPATH =

> "bin:{0}/tools/jars/tools.jar:{0}/tools/jars/velocity-1.7-dep.jar".for

> mat(TO

> T)

>    SM_BASE = "{0}/Peaxy/sm".format(TOT)

>    FROYO_BASE = SM_BASE + "/froyo"

>    C_FROM_DIR = FROYO_BASE + "/output/c"

>    C_TO_DIR = SM_BASE + "/libipc/src"

>    JAVA_FROM_DIR = FROYO_BASE + "/output/java/com/peaxy/ipc/fw"

>    JAVA_TO_DIR = SM_BASE + "/common/src/com/peaxy/ipc"

> 

>    env = Environment(JAVACLASSPATH=CLASSPATH, JAVAVERSION="1.7")

> 

>    env.Clean("all", Glob("bin") + Glob("output") + Glob(C_TO_DIR + 

> "/fw") + Glob(JAVA_TO_DIR + "/fw"))

> 

>    build = env.Alias("build", [env.Java("bin", "src"), env.Java("bin",

> "idl")])

> 

>    codegen = env.Alias("codegen", env.Command(

>        "codegen", [],

>        "java -cp {0} -Dsdir={1}/idl -Dodir={1}/output 

> -Dtdir={1}/template -Ddpath={1}/bin com.peaxy.ipc.codegen.IDLCompiler"

>            .format(CLASSPATH, FROYO_BASE)),

>    )

> 

>    copy = env.Alias("copy", env.Install(C_TO_DIR, Glob(C_FROM_DIR +

> "/fw")))

> 

>    Default(build, codegen, copy)

> 

> My application is basically a code generator and there are three 

> distinct

> phases: build, codegen, and copy. My ant script also has an "all" 

> target so that when I do an "ant all", it runs the targets build, 

> codegen, and copy in sequence. I'm using the scons Default function to

mimic the ant "all"

> target, at least that's my intent. When I run "scons -c clean", all of 

> the generated files are cleaned up as expected. When I run "scons" 

> without any arguments, the build and codegen phases work as intended. 

> However, the 'copy' target reports "Nothing to be done for 'copy'." If 

> I then immediately turn around and run "scons copy", the files are 

> copied successfully on this attempt. So, I'm missing something key how 

> this all operates. Why does the copy alias not work when run through 

> Default() but does run when specified explicitly as a target?

> 

> In fact, my script above isn't quite complete. What I really want for 

> the copy step is something like this:

> 

>    copy = env.Alias("copy", [env.Install(C_TO_DIR, Glob(C_FROM_DIR + 

> "/fw")),

> 

> env.Install(JAVA_TO_DIR, Glob(JAVA_FROM_DIR + "/fw"))])

> 

> However, this doesn't work at all and I'm clearly not constructing the 

> logic correctly. Basically, I want to copy the generated source files 

> to two separate locations, one in a C source directory and another in 

> a Java source directory. These projects are then built in separate 

> steps with their own scons/ant scripts.

> 

> 

> -----Original Message-----

> From: scons-users-bounces at scons.org 

> [mailto:scons-users-bounces at scons.org]

> On Behalf Of Francis Bolduc

> Sent: Monday, September 10, 2012 5:14 AM

> To: SCons users mailing list

> Subject: Re: [Scons-users] Copying and merging directories

> 

>> env.Alias('copy', env.Command('copy', [], env.Install(TO_DIR,

>> env.Glob(FROM_DIR))))

> 

> I think there are two problems with this.

> 

> 1- env.Command is redundant, simply remove it.

> 

> env.Alias('copy', env.Install(TO_DIR, env.Glob(FROM_DIR)))

> 

> 2- Glob(pattern) returns files matching the pattern in the SConscript 

> directory. So if you print the result from Glob(), you'll see which 

> files will be copied. Also, beware, Glob(pattern) is not recursive.

> 

> for node in env.Glob('*.h'):

>   print node.abspath

> 

> Finally, be sure to keep the Alias because if TO_DIR is not in the 

> SConscript's directory or one of it's sub-directories, SCons will not 

> copy the install the files unless you specify the install directory as 

> part of the target. The phony 'copy' target you created prevents this.

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