#!/bin/sh

# Set up directories.
metadata_dir=metadata
public_dir=public
cur_dir=$(pwd)
mkdir -p "$public_dir"

# Remove target files for which no sources files can be found.
for file in "$metadata_dir"/*.intermediate; do
  basename=$(basename "$file")
  if   test -f "$file" &&
     ! test -f "${basename%.intermediate}.md" &&
     ! test -f "${basename%.intermediate}.rst"; then
    rm "$file"
  fi
done
for file in "$metadata_dir"/*.automatic_metadata; do
  basename=$(basename "$file")
  if   test -f "$file" &&
     ! test -f "${basename%.automatic_metadata}.md" &&
     ! test -f "${basename%.automatic_metadata}.rst"; then
    rm "$file"
  fi
done
for file in *.html; do
  if   test -f "$file" &&
     ! test "$file" = "index.html" &&
     ! test -f "${metadata_dir}/${file%.html}.intermediate"; then
    rm "$file"
  fi
done

# Determine target files from the sources files present, declare dependencies
# of the all.do script on them / build them if necessary.
for file in *.rst *.md; do
  if test -f "$file"; then
    redo-ifchange "${metadata_dir}/${file%.*}.intermediate"
    html_file=${file%.*}.html
    redo-ifchange "$html_file"
    ln -sf "$cur_dir/$html_file" "${public_dir}/"
  fi
done

# Regenerate feed and index pages. Always.
redo feed.xml
ln -sf "$cur_dir"/feed.xml "${public_dir}/"
redo index.html
ln -sf "$cur_dir"/index.html "${public_dir}/"