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Re: [O] Not overwriting unchanged source code files when tangling
From: |
Nick Dokos |
Subject: |
Re: [O] Not overwriting unchanged source code files when tangling |
Date: |
Fri, 18 Nov 2011 14:32:36 -0500 |
Holger Hoefling <address@hidden> wrote:
> Hi Carsten,
>
> thanks for the suggestion, but as I agree with Brian. If there is more
> than one source file in the org-file, then the whole project would
> still be recompiled, not just the updated file.
>
> To be more exact, I actually don't want to compile things, but run R
> scripts using make. So the waiting time if a computationally intensive
> step is repeated although it is not necessary can be substantial.
>
> I wonder how difficult the following change would be (no emacs lisp
> experience, also do not know the org source code):
>
> - would it be possible to write out the source files when tangling
> - into a temporary directory, then compare to the actual target files
> - and overwrite only if something has changed? Then the time stamps
> - would stay fixed. Hopefully, this would not involve too much work:
You've lost right there unless there is a method to select *which* source
blocks to tangle. IOW, the problem is not the *comparison* of the temp and
actual
target files, it is the *production* of the temp files themselves: that's
the computationally expensive step and this method does nothing to alleviate
that. Unless I'm missing something.
Nick
> - creating temporary files and remembering the mapping to true files
> - tangling out as usual into temporary files (so probably little
> - change there)
> - compare temporary file to true file (does emacs already have a diff
> - utility that could be used?)
> - overwrite true file if any changes
> - delete temporary files
- Re: [O] Not overwriting unchanged source code files when tangling, (continued)
- Re: [O] Not overwriting unchanged source code files when tangling, Holger Hoefling, 2011/11/18
- Re: [O] Not overwriting unchanged source code files when tangling,
Nick Dokos <=
- Re: [O] Not overwriting unchanged source code files when tangling, Holger Hoefling, 2011/11/18
- Re: [O] Not overwriting unchanged source code files when tangling, Nick Dokos, 2011/11/18
- Re: [O] Not overwriting unchanged source code files when tangling, Holger Hoefling, 2011/11/19
- Re: [O] Not overwriting unchanged source code files when tangling, Holger Hoefling, 2011/11/19
- Re: [O] Not overwriting unchanged source code files when tangling, Allen S. Rout, 2011/11/22
- Re: [O] Not overwriting unchanged source code files when tangling, Nick Dokos, 2011/11/22
- Re: [O] Not overwriting unchanged source code files when tangling, cberry, 2011/11/19
Re: [O] Not overwriting unchanged source code files when tangling, Achim Gratz, 2011/11/18
Re: [O] Not overwriting unchanged source code files when tangling, Rustom Mody, 2011/11/19