Make markdown bibliography from bib file

make-bibliography

#!/bin/sh
# Converts bib file to markdown bibliography text.
# Treats markdown headings in bib file as chapters.
# You can put any markdown there and
# actually use references to entries in the chapter.
# (You can't, if you want to use it with biblatex).

if [ -z "$1" ]; then
  echo "Usage: $0 bib-file [csl-file]"
  exit 1;
fi

PANDOC_BASE_CMD="pandoc
  --filter pandoc-citeproc
  -t markdown_github"

if [ ! -z "$2" ]; then
  PANDOC_BASE_CMD="$PANDOC_BASE_CMD --csl $2"
fi

chapters=$(grep -n "#" $1 | cut -d':' -f1)
chapters_filter=$(echo "$chapters" |
  sed -n '/.*/p;x;p;d;x;' | tail -n +3 |
  paste -d '-' - - | xargs -n1 printf "%s > 2\n" | bc)
chapters_filter_indexes=`echo "$chapters_filter" | cat -n | grep -e "1$" | cut -f1`
chapters_filter_sed_cmd=$(echo $chapters_filter_indexes | tr '\n' ' ' | sed 's/ /p;/g')
chapters=$(echo "$chapters" | tail -n +2 | sed -n -e $chapters_filter_sed_cmd)
end=$(expr `wc -l < $1` + 1) # + 1 because point actually is a next line
chapters=$(echo "$chapters\n$end")

ppoint=1
for point in $chapters; do
  point=$(expr $point - 1)

  content=$(sed "$ppoint,$point!d" $1)
  header=$(echo "$content" | grep -e "^@" | sed "s/@.*{\(.*\),/@\1/" | tr '\n' ',' | xargs printf '\-\-\-\nnocite: |\n %s \n\-\-\-')
  md_content=$(echo "$content" | sed '/^@.*{.*/,/^}$/d' | sed '/^$/N;/^\n$/d')
  bb_content=$(echo "$content" | sed -n '/^@.*{.*/,/^}$/p')

  echo "$bb_content" > /tmp/chapter.bib
  pandoc_cmd="$PANDOC_BASE_CMD --bibliography /tmp/chapter.bib"
  echo "$header\n$md_content" | eval $pandoc_cmd
  echo ""
  rm /tmp/chapter.bib

  ppoint=$point
done