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Editorial Team
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Asked: 2026-05-31T18:40:00+00:00

I posted this question here on purpose, although – for my case – it

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I posted this question here on purpose, although – for my case – it is laTex related. The problem itself is generic though.

I’ve got several *.tex-source files containing references to images, e.g. image1.jpg and image2.png. I want to search all source file for a specified set of extensions (in this case jpg and png) and replace them with their pdf counterparts. Consequently I want to end up with the references image1.pdf and image2.pdf. To complicate the problem, I’ve got a list of 20 files (image3.jpg, image 4.png etc.) that I don’t want changed.

Is there a simple solution out there (sed-based or any tool suggestions?) which might help? I’m no regular expressions guru, though. 😉

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1 Answer

  1. Editorial Team

    Replace the filenames on your blacklist into some “magic” strings so that they will not look like filenames and will not be matched by anything.

    cat your.tex | \
sed 's/image3.jpg/MMMAAAGGGIIICCC1/g' | \
sed 's/image4.png/MMMAAAGGGIIICCC2/g' | \
# ... all others on your blacklist
# then do regexp replacements
sed 's/\(image[0-9]\+\)\.\(png\|jpg\)/\1.pdf/g' | \
# ... convert all "magics" back
sed 's/MMMAAAGGGIIICCC1/image3.jpg/g' | \
sed 's/MMMAAAGGGIIICCC2/image4.png/g' | \
# ... and many others
# then output
cat > output.tex
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