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 had posted this question (without much success) here:
http://stackoverflow.com/questions/16058187/make-git-ignore-the-date-in-pdf-files
and with no answer on the git-users mailing list:
https://groups.google.com/forum/#!topic/git-users/KqtecNa3cOc
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