#!/bin/bash
# Regenerate html files.
# If given a single argument, try to regenerate just that file. Not supported everywhere.

set -e

( cd tools; c++ -g linkify.cc -o linkify; )

# generate html/$1.html using /tmp/tags
process() {
  mkdir -p html/`dirname $1`
  rm -f html/$1.html
  convert_html $1
  tools/linkify /tmp/tags html/$1.html
  mv html/$1.html.out html/$1.html
}

URL_BASE='https://github.com/akkartik/mu/blob/main'

convert_html() {
  vim -c "set number" -c TOhtml -c write -c qall $1

  sed -i 's,<title>.*/mu/,<title>Mu - ,' $1.html
  sed -i 's,\.html</title>,</title>,' $1.html

  sed -i "/^<body/a <a href='$URL_BASE/$1'>$URL_BASE/$1</a>" $1.html

  sed -i 's/^\* { \(.*\) }/* { font-size:12pt; \1 }/g' $1.html
  sed -i 's/^body { \(.*\) }/body { font-size:12pt; \1 }/g' $1.html

  sed -i '/^body {/a a { color:inherit; }' $1.html

  # switch unicode characters around in the rendered html
  #   the ones we have in the source files render double-wide in html
  #   the ones we want in the html cause iTerm2 to slow down in alt-tabbing for some reason
  # the following commands give us the best of both worlds
  sed -i -e 's/┈/╌/g' -e 's/┊/╎/g' $1.html

  mv -i $1.html html/`dirname $1`
}

ctags -x [0-9]*.subx [0-9]*.mu  > /tmp/tags
for f in [0-9]*.subx [0-9]*.mu
do
  test $# -gt 0  &&  test $1 != $f  &&  continue
  process $f
done

for f in [^0-9]*.subx [^0-9]*.mu
do
  test $# -gt 0  &&  test $1 != $f  &&  continue
  ctags -x [0-9]*.subx [0-9]*.mu $f > /tmp/tags
  process $f
done

( cd shell
  ctags -x ../[0-9]*.subx ../[0-9]*.mu *.mu > /tmp/tags
)
for f in shell/*.mu
do
  test $# -gt 0  &&  test $1 != shell/$f  &&  continue
  process $f
done

( cd linux
  ctags -x [0-9]*.subx [0-9]*.mu  > /tmp/tags
)
for f in linux/[0-9]*.subx linux/[0-9]*.mu
do
  process $f
done

for f in linux/[^0-9]*.subx linux/[^0-9]*.mu
do
  ( cd $(dirname $f)
    ctags -x [0-9]*.subx [0-9]*.mu $(basename $f)  > /tmp/tags
  )
  process $f
done

for f in linux/advent2020/*.mu
do
  ( cd $(dirname $f)
    ctags -x ../[0-9]*.subx ../[0-9]*.mu $(basename $f) > /tmp/tags
  )
  process $f
done

for dir in linux/raytracing linux/tile
do
  ( cd $dir
    ctags -x ../[0-9]*.subx ../[0-9]*.mu *.mu > /tmp/tags
  )
  for f in $dir/*.mu
  do
    process $f
  done
done

( cd linux/bootstrap
  ctags -x *.cc  |grep -v '^. '  > /tmp/tags  # don't hyperlink every 'i' to the integer register variant
)
for f in linux/bootstrap/*.cc
do
  process $f
done

rm /tmp/tags