bbl2bib.pl - convert thebibliography environment to a bib file

       Boris Veytsman

       Copyright (C) 2014-2021  Boris Veytsman

       This  is  free  software.   You  may  redistribute copies of it under the terms of the GNU General Public
       License <http://www.gnu.org/licenses/gpl.html>.  There is NO WARRANTY, to the extent permitted by law.

                                                   2023-08-20                                         bbl2bib(1)

       The  script  tries to reconstruct a "bib" file from the corresponding "thebibliography" environment.  One
       can argue that this operation is akin to reconstructing a cow from the steak.  The way the script does it
       is searching for the entry in the MR database, and creating the corresponding BibTeX fields.

       The script reads a TeX or Bbl file and extracts from it  the  "thebibliography"  environment.   For  each
       bibitem it creates a plain text bibliography entry, and then  tries to match it in the database.

          bbl2bib  -o - file.tex > result.bib
          bbl2bib  -o result.bib file.bbl
          bbl2bib  file.tex

       We assume some structure of the input file:

       1.  The bibliography is contained between the lines

              \begin{thebibliography}...

           and

              \end{thebibliography}

       2.  Each bibliography item starts from the line

              \bibitem[...]{....}

       bbl2bib.pl - convert thebibliography environment to a bib file

       [-d]
           Send debugging output to stdout

       -ooutput
           Output  file.   If  this  option  is not used, the name for the output file is formed by changing the
           extension to ".bib"

       -u  Do not clean URL fields.

           Normally "bbl2bib" recognizes URL fields of the  kind  "http://dx.doi.org"  and  their  variants  and
           converts them to DOI fields (see also biburl2doi(1) script).  The switch -u suppresses this cleanup.

       bbl2bib.pl [-d] [-u] [-ooutput] file