Error with lxml on Mac OS Big Sur about mathbin

[gerw]

I cannot reproduce. The XML file from dx.doi.org does not contain nbsp for me.

Can you post the content of the temporary file (/tmp/81657250 above)? You have to call

curl -sL -H "Accept: application/vnd.crossref.unixsd+xml" http://dx.doi.org/10.1016/j.cam.2016.07.018 > /tmp/81657250

before.

[kellertuer]

Thanks for the fast response – the content I get is https://gist.github.com/kellertuer/cb21abeac606b14c4a69c7e79f7e749a (after running your call).

But running the doi2pdf command again and opening the tmp file, the problem is, that I seem to retrieve a html file instead https://gist.github.com/kellertuer/001571ed560c4b6f4e78d13b0931def6.

Let me know how I can help further, I am not that experienced with shell scripts and all the involved tools (and which might be missing on Mac OS).

[gerw]

I don't know. Somehow, you do not get the xml from dx.doi.org but rather a standard page on which you can enter a doi number. This does not seem to be a bug in doi2pdf.

[kellertuer]

So I think i found the issue and solution. The problem is that the mac OS grep does not have a -P option. So one can install the gnu grep via homebrew using brew install grep but that installs it as ggrep (See also https://formulae.brew.sh/formula/grep). So with the line

export PATH="$(brew --prefix)/opt/grep/libexec/gnubin:$PATH"

added to .zshrc one can get the gnu grep as normal grep command in mac os.

So you are right, this was not a bug in doi2pdf, it just means that currently the mathbin scripts are not compatible with Mac OS.