Render a given release from changelog to PNG

render-changelog.sh

#!/bin/sh

# Dependencies:
#   pandoc: https://pandoc.org/installing.html#linux
#   wkhtmltox: https://wkhtmltopdf.org/downloads.html

changelog=$1
release=$2

if [ -z "$changelog" ] || [ -z "$release" ]; then
  echo "Usage: $0 [changelog] [release]";
  exit 1;
fi;

AWK_PROGRAM=$(cat <<- EOAWK
  BEGIN {
    active="false";
  }

  /##/ {
    if (\$1 == "##") {
      if (\$2 == "$release") {
        active = "true";
      } else {
        active = "false";
      }
    }
  }

  {
    if (active == "true")
      print;
  }
EOAWK
)

# Template directory is fixed to "pandoc-template/", feel free to change
awk "$AWK_PROGRAM" $changelog | pandoc -f markdown -t html \
  --template=pandoc-template/template.html \
  --css=pandoc-template/template.css \
  --self-contained \
  -o CHANGELOG.html

wkhtmltoimage --width 720 CHANGELOG.html CHANGELOG.png

rm CHANGELOG.html