[PATCH 3/4] Revert "use olddoc 1.1.0 for generating NEWS + NEWS.atom.xml"

[Eric Wong <yahns-public@yhbt.net>]

This reverts commit bcf0f0efb3173b18957ddba2af6592219a2d72a3.

The dependency on olddoc makes it slightly more difficult for
users to package their own and distribute RubyGems.  We will
also not host HTML RDoc files since we have no internal API
to support.
---
 .gitignore  |   1 -
 .olddoc.yml |   7 -----
 Rakefile    | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 3 files changed, 97 insertions(+), 12 deletions(-)
 delete mode 100644 .olddoc.yml

diff --git a/.gitignore b/.gitignore
index c1c147f..45603bb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,4 +15,3 @@
 .gem-manifest
 .tgz-manifest
 /doc
-/LATEST
diff --git a/.olddoc.yml b/.olddoc.yml
deleted file mode 100644
index 67b78d0..0000000
--- a/.olddoc.yml
+++ /dev/null
@@ -1,7 +0,0 @@
----
-cgit_url: https://yhbt.net/yahns.git
-git_url: git://yhbt.net/yahns.git
-rdoc_url: https://yhbt.net/yahns/
-ml_url: https://yhbt.net/yahns-public/
-public_email: yahns-public@yhbt.net
-private_email: yahns@yhbt.net
diff --git a/Rakefile b/Rakefile
index b776c4a..3eb0219 100644
--- a/Rakefile
+++ b/Rakefile
@@ -66,12 +66,105 @@ def tags
   end.compact.sort { |a,b| b[:time] <=> a[:time] }
 end
 
+def xml(dst, tag, text = nil, attrs = nil)
+  if Hash === text
+    attrs = text
+    text = nil
+  end
+  if attrs
+    attrs = attrs.map { |k,v| "#{k}=#{v.encode(xml: :attr)}" }
+    attrs = "\n#{attrs.join("\n")}"
+  end
+  case text
+  when nil
+    if block_given?
+      dst << "<#{tag}#{attrs}>"
+      yield
+      dst << "</#{tag}>"
+    else
+      dst << "<#{tag}#{attrs}/>"
+    end
+  else
+    dst << "<#{tag}#{attrs}>#{text.encode(xml: :text)}</#{tag}>"
+  end
+end
+
 desc 'prints news as an Atom feed'
 task "NEWS.atom.xml" do
-  # gem install 'olddoc', 'olddoc prepare' has no API besides the
-  # command-line.  This requires olddoc 1.1 or later.
-  system('olddoc', 'prepare') or abort "olddoc prepare failed #$?"
+  require 'uri'
+  cgit_uri = URI('https://yhbt.net/yahns.git')
+  uri = URI('https://yhbt.net/yahns/')
+  new_tags = tags[0,10]
+  time = nil
+  project_name = 'yahns'
+  short_desc = File.readlines('README')[0].split(' - ')[0]
+  new_tags = tags[0,10]
+  atom_uri = uri.dup
+  atom_uri.path += 'NEWS.atom.xml'
+  news_uri = uri.dup
+  news_uri.path += 'NEWS.html'
+  dst = ''
+  xml(dst, 'feed', xmlns: 'http://www.w3.org/2005/Atom') do
+    xml(dst, 'id', atom_uri.to_s)
+    xml(dst, 'title', "#{project_name} news")
+    xml(dst, 'subtitle', short_desc)
+    xml(dst, 'link', rel: 'alternate', type: 'text/html', href: news_uri.to_s)
+    xml(dst, 'updated', new_tags.empty? ? '1970-01-01:00:00:00Z'
+                                      : new_tags[0][:time])
+    new_tags.each do |tag|
+      xml(dst, 'entry') do
+        xml(dst, 'title', tag[:subject])
+        xml(dst, 'updated', tag[:time])
+        xml(dst, 'published', tag[:time])
+        xml(dst, 'author') do
+          xml(dst, 'name', tag[:tagger_name])
+          xml(dst, 'email', tag[:tagger_email])
+        end
+        uri = cgit_uri.dup
+        uri.path += '/tag/'
+        uri.query = "id=#{tag[:tag]}"
+        uri = uri.to_s
+        xml(dst, 'link', rel: 'alternate', type: 'text/html', href: uri)
+        xml(dst, 'id', uri)
+        xml(dst, 'content', type: 'xhtml') do
+          xml(dst, 'div', xmlns: 'http://www.w3.org/1999/xhtml') do
+            xml(dst, 'pre', tag[:body])
+          end # div
+        end # content
+      end # entry
+    end # new_tags.each
+  end # feed
+
+  fp = Tempfile.new('NEWS.atom.xml', '.')
+  fp.sync = true
+  fp.write(dst)
+  fp.chmod 0644
+  File.utime(time, time, fp.path) if time
+  File.rename(fp.path, 'NEWS.atom.xml')
+  fp.close!
 end
 
 desc 'prints news as a text file'
-task 'NEWS' => 'NEWS.atom.xml'
+task 'NEWS' do
+  fp = Tempfile.new('NEWS', '.')
+  fp.sync = true
+  time = nil
+  tags.each do |tag|
+    time ||= tag[:time_obj]
+    line = tag[:subject] + ' / ' + tag[:time].sub(/T.*/, '')
+    fp.puts line
+    fp.puts('-' * line.length)
+    fp.puts
+    fp.puts tag[:body]
+    fp.puts
+  end
+  fp.write("Unreleased\n\n") unless fp.size > 0
+  fp.puts "COPYRIGHT"
+  fp.puts "---------"
+  fp.puts "Copyright (C) 2013-2017 all contributors <yahns-public@yhbt.net>"
+  fp.puts "License: GPL-3.0+ <https://www.gnu.org/licenses/gpl-3.0.txt>"
+  fp.chmod 0644
+  File.utime(time, time, fp.path) if time
+  File.rename(fp.path, 'NEWS')
+  fp.close!
+end
-- 
EW