No answer so far.  Is there something I can do to improve this question?  
Or should I ask somewhere else?

Best,
Andreas

Am Donnerstag, 2. Mai 2013 12:45:54 UTC+2 schrieb andrea...@gmail.com:
>
> Hi all,
>
> how can I make git ignore the time stamp(s) in a PDF.  Two PDFs that
> differ only in these time stamps should be considered identical.
>
> Here is an example:
> ,----
> | > pdfinfo some.pdf 
> | Title:          R Graphics Output
> | Creator:        R
> | Producer:       R 2.15.1
> | CreationDate:   Thu Jan 24 13:43:31 2013 <==  these entries
> | ModDate:        Thu Jan 24 13:43:31 2013 <==  should be ignored
> | Tagged:         no
> | Pages:          1
> | Encrypted:      no
> | Page size:      504 x 504 pts
> | File size:      54138 bytes
> | Optimized:      no
> | PDF version:    1.4
> `----
>
>
> What I tried is a filter:
> ,----[ ~/.gitconfig ]
> | [filter "pdfresetdate"]
> |         clean = pdfresetdate
> `----
>
> With this filter script:
> ,----[ pdfresetdate ]
> | #!/bin/bash
> | 
> | FILEASARG=true
> | if [ "$#" == 0 ]; then
> |     FILEASARG=false
> | fi
> | 
> | if $FILEASARG ; then
> |     FILENAME="$1"
> | else
> |     FILENAME=`mktemp`
> |     cat /dev/stdin > "${FILENAME}"
> | fi
> | 
> | TMPFILE=`mktemp`
> | TMPFILE2=`mktemp`
> | 
> | ## dump the pdf metadata to a file and replace the dates
> | pdftk "$FILENAME" dump_data | sed -e '{N;s/Date\nInfoValue: 
> D:.*/Date\nInfoValue: D:19790101072619/}' > "$TMPFILE"
> | 
> | ## update the pdf metadata
> | pdftk "$FILENAME" update_info "$TMPFILE" output "$TMPFILE2"
> | 
> | ## overwrite the original pdf
> | mv -f "$TMPFILE2" "$FILENAME"
> | 
> | ## clean up
> | rm -f "$TMPFILE"
> | rm -f "$TMPFILE2"
> | if [ -n $FILEASARG ] ; then
> |     cat "$FILENAME"
> | fi
> `----
>
>
> This 'works' as far as the committed pdf indeed has the date reset to my
> default value.
>
> However, when I re-checkout the files, they are marked modified by git.
>
> So, my question is:  How can I make git *completely* ignore the embedded
> date in the PDF?
>
> Many thanks in advance for any help!
>
> Regards,
> Andreas
>
> PS: I'd posted this question (without much success) here:
>
> http://stackoverflow.com/questions/16058187/make-git-ignore-the-date-in-pdf-files
>
> PPS: Why is posting via gmane not allowed?  It would be easier for me.  
> And it should be possible technically, since for instance 
> http://dir.gmane.org/gmane.comp.handhelds.android.mobileorg is a google 
> groups list and allows posting via gmane.
>

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