[Scons-users] File / Dir relative paths and SConscriptChdir

[Bill Deegan]

Perhaps you can explain what you're actually trying to do, rather than
providing a toy example?
That will help provide more context correct help.

On Thu, Sep 6, 2018 at 4:23 PM RW via Scons-users <scons-users at scons.org>
wrote:

> Hi,
> I've got another question, this is over the use of SConscriptChdir
> such as env.SConscriptChdir(0)
> from what I can gather when specifying a File or Dir object or making a
> call to a Command builder at least which will automatically convert a
> string target to a File object.
>
> The File / Dir object will always be relative to the current SConstruct
> file.
> Not relative to the originating SConstruct file (which is what I'm trying
> to do)
>
> To give an example
>
> src1\test1.txt - empty test file
> src1\test2.txt - empty test file
>
> src1\SConstruct
> ```
> import os
>
> EnsureSConsVersion(3, 0, 0)
>
> # Setup the construction env
> env = Environment(ENV={'PATH': os.environ['PATH']})
>
> # Set working directory to not change
> env.SConscriptChdir(0)
>
> # Load in an external script
> SConscript('../src2/testsubscript.py', {'env': env})
> ```
>
> src2\SConstruct
> ```
> # Import the scons environment from the calling script
> Import('env')
>
> def build_test(target, source, env):
>     # At this point the 'testfile.txt' will be automatically changed to a
> File class by SCons
>
>     # print the path scons thinks this file is located at
>     print(target[0].path)
>
> tgt = env.Command(File('testfile.txt'), [], build_test)
> env.Default(tgt)
>
> tgt2 = env.Command('testfile2.txt', [], build_test)
> env.Default(tgt2)
>
> # Even though SConscriptChdir is set to 0 in the originating env, File
> uses the current script as it's reference point
> # D:\Temp\testproject\src2\testfile.txt
> # D:\Temp\testproject\src2\testfile2.txt
> ```
>
> Is this expected behaviour?
> perhaps SConscriptChdir only influences when calling exe's rather than the
> use of File or Dir
> is there some public API way of setting the current directory for File /
> Dir calls?
> thats not the directory of the current SConsscript
> since builders wrap everything in a File automatically, it might mean I
> have to make sure all file paths are absolute before hand.
>
> Many Thanks
> Richard
>
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