10 files changed, 300 insertions, 0 deletions
diff --git a/lib/html.rb b/lib/html.rb
new file mode 100644
index 0000000..61e25a3
--- /dev/null
+++ b/lib/html.rb
@@ -0,0 +1,13 @@
+require './lib/templated'
+
+def render_html song
+  template = html_template 'song'
+  template.result binding
+end
+
+def make_htmls songs
+  songs.each do |song_id, song|
+    content = render_html song
+    write_templated content, song_html(song_id), song.title
+  end
+end
diff --git a/lib/latex.rb b/lib/latex.rb
new file mode 100644
index 0000000..e17a6ef
--- /dev/null
+++ b/lib/latex.rb
@@ -0,0 +1,17 @@
+def render_latex song
+  template = tex_template 'song'
+  templated = template.result binding
+  File.write(tmp(song_tex song.id), templated)
+end
+
+def render_pdf song
+  render_latex song
+  system "lualatex --shell-escape -output-directory=#{TmpDir}/#{SongsDir} #{tmp (song_tex song.id)}"
+  system "mv #{tmp (song_pdf song.id)} #{build (song_pdf song.id)}"
+end
+
+def make_pdfs songs
+  songs.each_value do |song|
+    render_pdf song
+  end
+end
diff --git a/lib/ly.rb b/lib/ly.rb
new file mode 100644
index 0000000..fc85204
--- /dev/null
+++ b/lib/ly.rb
@@ -0,0 +1,14 @@
+def compile_ly ly_filename
+  system "lilypond --svg --output=#{tmp SongsDir} #{ly_filename}"
+  system "lilypond --output=#{tmp SongsDir} #{ly_filename}"
+end
+
+def make_sheets songs
+  songs.keys.each do |song_id|
+    ly_filename = src(song_ly song_id)
+    if File.file? ly_filename
+      compile_ly ly_filename
+      system "mv #{tmp (song_tmp_svg song_id)} #{build(song_svg song_id)}"
+    end
+  end
+end
diff --git a/lib/pather.rb b/lib/pather.rb
new file mode 100644
index 0000000..1f59df0
--- /dev/null
+++ b/lib/pather.rb
@@ -0,0 +1,39 @@
+class Pather
+  attr_accessor :current_path
+  def initialize
+    @assets = {}
+    @current_path = []
+  end
+
+  def add asset_id, path
+    @assets[asset_id] = @current_path + path.split('/')
+  end
+
+  def path_to asset_id
+    other_path = @assets[asset_id]
+    find_path_between @current_path, other_path
+  end
+
+  def find_path_between from, to
+    from, to = drop_common_prefix from, to
+    path = ('../' * from.length) + to.join('/')
+  end
+
+  def drop_common_prefix path1, path2
+    common_prefix_length = path1.zip(path2).take_while do |(segment1, segment2)|
+      segment1 == segment2
+    end.length
+
+    return path1[common_prefix_length..], path2[common_prefix_length..]
+  end
+
+  def cd path
+    path.split('/').each do |segment|
+      if segment == '..'
+        @current_path.pop
+      else
+        @current_path.push segment
+      end
+    end
+  end
+end
diff --git a/lib/recording.rb b/lib/recording.rb
new file mode 100644
index 0000000..d1d7683
--- /dev/null
+++ b/lib/recording.rb
@@ -0,0 +1,36 @@
+class NotImplemented < Exception
+end
+
+class Recording
+  def render
+    raise NotImplemented
+  end
+end
+
+class YouTubeRecording
+  attr_accessor :vid
+  def initialize link
+    @vid = parse_vid link
+  end
+
+  def parse_vid link
+    /\?v=(.{11})/.match(link)[1]
+  end
+
+  def render
+    template = ERB.new(File.read('templates/youtube.html.erb'), trim_mode: '-')
+    template.result binding
+  end
+end
+
+class BandcampRecording
+  attr_accessor :link
+  def initialize link
+    @link = link
+  end
+
+  def render
+    template = ERB.new(File.read('templates/bandcamp.html.erb'), trim_mode: '-')
+    template.result binding
+  end
+end
diff --git a/lib/song.rb b/lib/song.rb
new file mode 100644
index 0000000..4076956
--- /dev/null
+++ b/lib/song.rb
@@ -0,0 +1,47 @@
+require 'yaml'
+
+require './lib/recording'
+
+class Song
+  attr_accessor :title, :id, :lyrics, :recordings
+  def initialize title, id
+    @title = title
+    @id = id
+    @recordings = []
+  end
+
+  def self.from_yaml song_id
+    metadata = YAML.load(File.read(src(song_meta song_id)))
+    song = Song.new metadata['title'], song_id
+
+    song.lyrics = nil
+    lyrics_file = src (song_lyrics song_id)
+    if File.file? lyrics_file
+      song.lyrics = File.read lyrics_file
+    end
+
+    if metadata['recordings']
+      metadata['recordings'].each do |recording|
+        if recording['type'] == 'youtube'
+          song.recordings.push YouTubeRecording.new(recording['link'])
+        elsif recording['type'] == 'bandcamp'
+          song.recordings.push BandcampRecording.new(recording['link'])
+        end
+      end
+    end
+    song
+  end
+
+  def split_lyrics
+    @lyrics.split("\n\n").map { |paragraph| paragraph.split "\n" }
+  end
+
+  def render_sheet_music
+    if File.file? (src (song_ly id))
+      template = ERB.new(File.read('templates/sheet_music.html.erb'), trim_mode: '-')
+      template.result binding
+    else
+      ""
+    end
+  end
+end
diff --git a/lib/songs.rb b/lib/songs.rb
new file mode 100644
index 0000000..aa519e1
--- /dev/null
+++ b/lib/songs.rb
@@ -0,0 +1,19 @@
+require 'set'
+
+require './lib/util'
+
+@songs = nil
+
+def get_song_ids dir
+  ids = Set.new
+  Dir.new(src SongsDir).children.each do |filename|
+    ids.add(File.basename filename, '.*')
+  end
+  ids
+end
+
+def songs
+  @songs ||= get_song_ids(SongsDir).map do |song_id|
+    [song_id, Song.from_yaml(song_id)]
+  end.to_h
+end
diff --git a/lib/statics.rb b/lib/statics.rb
new file mode 100644
index 0000000..24ca9d6
--- /dev/null
+++ b/lib/statics.rb
@@ -0,0 +1,10 @@
+require 'fileutils'
+
+def write_statics statics
+  statics = statics.each do |filename|
+    source = src filename
+    target = build filename
+    FileUtils.mkdir_p(File.dirname target)
+    FileUtils.cp_r source, target
+  end
+end
diff --git a/lib/templated.rb b/lib/templated.rb
new file mode 100644
index 0000000..548352c
--- /dev/null
+++ b/lib/templated.rb
@@ -0,0 +1,20 @@
+def write_templated_file content_filename, title
+  content = File.read(src content_filename)
+  write_templated content, content_filename, title
+end
+
+def write_erb erb_filename
+  content = ERB.new(File.read(src erb_filename)).result
+  cut_filename = erb_filename.sub /\.erb$/, ''
+  File.write build(cut_filename), content
+end
+
+def write_templated_erb erb_filename, title = nil
+  content = ERB.new(File.read(src erb_filename), trim_mode: '-').result
+  cut_filename = erb_filename.sub /\.erb$/, ''
+  write_templated content, cut_filename, title
+end
+
+def write_templated content, filename, title = nil
+  File.write build(filename), page_template.result(binding)
+end
diff --git a/lib/util.rb b/lib/util.rb
new file mode 100644
index 0000000..48698ff
--- /dev/null
+++ b/lib/util.rb
@@ -0,0 +1,85 @@
+SongsDir = 'songs'
+SrcDir = 'src'
+BuildDir = 'public'
+TmpDir = 'tmp'
+TemplatesDir = 'templates'
+
+def song filename
+  File.join SongsDir, filename
+end
+
+def build filename
+  File.join BuildDir, filename
+end
+
+def tmp filename
+  File.join TmpDir, filename
+end
+
+def src filename
+  File.join SrcDir, filename
+end
+
+def song_lyrics song_id
+  song "#{song_id}.txt"
+end
+
+def song_ly song_id
+  song "#{song_id}.ly"
+end
+
+def song_meta song_id
+  song "#{song_id}.yaml"
+end
+
+def song_tex song_id
+  song "#{song_id}.tex"
+end
+
+def song_sheet_pdf song_id
+  song "#{song_id}.cropped.pdf"
+end
+
+def song_tmp_svg song_id
+  song "#{song_id}.cropped.svg"
+end
+
+def song_pdf song_id
+  song "#{song_id}.pdf"
+end
+
+def song_sheet_svg song_id
+  song "#{song_id}.svg"
+end
+
+def song_svg song_id
+  song "#{song_id}.svg"
+end
+
+def song_html song_id
+  song "#{song_id}.html"
+end
+
+def template filename
+  ERB.new(File.read(filename), trim_mode: '-')
+end
+
+def template_file filename
+  File.join TemplatesDir, filename
+end
+
+def tex_template name
+  template(template_file "#{name}.tex.erb")
+end
+
+def html_template name
+  template(template_file "#{name}.html.erb")
+end
+
+def page_template
+  html_template 'template'
+end
+
+def path_to asset_id
+  P.path_to asset_id
+end