Rake task to update gh-pages without having another checkout

schacon · schacon · commit e76fe0c65d25 · 2011-06-20T08:45:02.000-07:00
diff --git a/Rakefile b/Rakefile
@@ -1,7 +1,32 @@
 require 'nanoc3/tasks'
 
-desc "compile and copy output to ../developer.github.pages"
 task :publish => [:clean] do
   sh "nanoc compile"
-  sh "cp -r output/ ../developer.github.pages"
+
+  # this should not be necessary, but I can't figure out how to
+  # just keep a goddamn static file in the root with nanoc
+  File.open("output/CNAME", 'w+') do |f|
+    f.puts("developer.github.com")
+  end
+
+  ENV['GIT_DIR'] = File.expand_path(`git rev-parse --git-dir`.chomp)
+  old_sha = `git rev-parse refs/remotes/origin/gh-pages`.chomp
+  Dir.chdir('output') do
+    ENV['GIT_INDEX_FILE'] = gif = '/tmp/dev.gh.i'
+    ENV['GIT_WORK_TREE'] = Dir.pwd
+    File.unlink(gif) if File.file?(gif)
+    `git add -A`
+    tsha = `git write-tree`.strip
+    puts "Created tree   #{tsha}"
+    if old_sha.size == 40
+      csha = `echo 'boom' | git commit-tree #{tsha} -p #{old_sha}`.strip
+    else
+      csha = `echo 'boom' | git commit-tree #{tsha}`.strip
+    end
+    puts "Created commit #{csha}"
+    puts `git show #{csha} --stat`
+    puts "Updating gh-pages from #{old_sha}"
+    `git update-ref refs/heads/gh-pages #{csha}`
+    `git push origin gh-pages`
+  end
 end
