diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
@@ -6,14 +6,21 @@ class ProjectsController < ApplicationController
 
   def index
     @projects = Project.order(projects_order).page(params[:page]).per(30)
+
+    # This will cause pages not to always include 30 results, but... oh well.
+    @projects = @projects.to_a.reject! {|p| BLACKLIST.include?(p.github_url) }
   end
 
   def search
-    if params[:query].present? && project = Project.find_or_create_by_url(params[:query])
+    if params[:query].present?
+      if BLACKLIST.include?(params[:query])
+        return render :blacklisted
+      end
+
+      project = Project.find_or_create_by_url(params[:query])
       redirect_to pretty_project_path(project)
     else
-      @projects = Project.search(params[:query].to_s).order(projects_order).page(params[:page]).per(30)
-      render :index
+      redirect_to :index
     end
   end
 
@@ -31,6 +38,10 @@ def search
   end
 
   def show
+    if BLACKLIST.include?(@project.github_url)
+      return render :blacklisted
+    end
+
     if @project.bitcoin_address.nil?
       uri = URI("https://blockchain.info/merchant/#{CONFIG["blockchain_info"]["guid"]}/new_address")
       params = { password: CONFIG["blockchain_info"]["password"], label:"#{@project.full_name}@tip4commit" }

diff --git a/app/models/project.rb b/app/models/project.rb
@@ -203,13 +203,11 @@ def check_tips_to_pay_against_avaiable_amount
   end
 
   def self.find_or_create_by_url project_url
-
     project_name = project_url.
       gsub(/https?\:\/\/github.com\//, '').
       gsub(/\#.+$/, '').
       gsub(' ', '')
 
     Github.new.find_or_create_project project_name
-
   end
 end
diff --git a/app/views/projects/blacklisted.html.haml b/app/views/projects/blacklisted.html.haml
@@ -0,0 +1,5 @@
+%h1= t(".title")
+
+.row
+  .col-md-12
+    .alert.alert-danger= t(".message")
diff --git a/config/blacklist.yml b/config/blacklist.yml
@@ -0,0 +1,15 @@
+- https://github.com/adamtanner/*
+- https://github.com/f-list/*
+- https://github.com/gae-init/gae-init
+- https://github.com/ggreer/the_silver_searcher
+- https://github.com/iros/*
+- https://github.com/jsocol/*
+- https://github.com/libretro/*
+- https://github.com/lipis/*
+- https://github.com/meowy/*
+- https://github.com/misoproject/*
+- https://github.com/mitsuhiko/*
+- https://github.com/mplewis/*
+- https://github.com/sczizzo/*
+- https://github.com/tcrayford/*
+- https://github.com/unitaker/*
diff --git a/config/initializers/blacklist.rb b/config/initializers/blacklist.rb
@@ -0,0 +1,2 @@
+# Load the blacklist.
+BLACKLIST ||= Blacklist.new(YAML.load_file("config/blacklist.yml"))
diff --git a/config/locales/en.yml b/config/locales/en.yml
@@ -125,6 +125,9 @@ en:
       message: Message
       tip: Tip (relative to the project balance)
       submit: Send the selected tip amounts
+    blacklisted:
+      title: Sorry, this project doesn't accept tips!
+      message: The author of this project has chosen to disallow tips for this project.
   tips:
     index:
       tips: Tips

diff --git a/lib/blacklist.rb b/lib/blacklist.rb
@@ -0,0 +1,42 @@
+require "set"
+
+class Blacklist
+  def initialize(urls)
+    urls = urls.map {|u| normalize_url(u) }
+
+    @urls = Set.new(urls)
+  end
+
+  def include?(url)
+    url = normalize_url(url)
+
+    if @urls.include?(url)
+      return true
+    end
+
+    # Check for the author path.
+    # https://github.com/author/*
+    url[url.rindex("/")..-1] = "/*"
+
+    @urls.include?(url)
+  end
+
+  private
+  def normalize_url(url)
+    url = url.clone
+
+    if !url.start_with?("http://", "https://", "//")
+      if !url.start_with?("github.com", "bitbucket.org")
+        # Assume it is a shortened "author/project" path and
+        # default to Github.
+        url.prepend("github.com/")
+      end
+      url.prepend("https://")
+    end
+
+    uri = URI.parse(url)
+
+    # Ignore irrelevant differences such as HTTP/HTTPS.
+    [uri.host, uri.path].join
+  end
+end
diff --git a/spec/controllers/projects_controller_spec.rb b/spec/controllers/projects_controller_spec.rb
@@ -7,6 +7,8 @@
       allow(Project).to receive(:order).with(available_amount_cache: :desc, watchers_count: :desc, full_name: :asc).and_return(Project)
       allow(Project).to receive(:page).with(nil).and_return(Project)
       allow(Project).to receive(:per).with(30).and_return(Project)
+      allow(Project).to receive(:to_a).and_return(Project)
+      allow(Project).to receive(:reject!).and_return(Project)
     end
 
     it 'renders index template' do
@@ -37,4 +39,23 @@
       expect(assigns[:projects].name).to eq 'Project'
     end
   end
+
+  describe '#search' do
+    let(:subject) { get :search, query: "https://github.com/mitsuhiko/flask" }
+
+    it 'renders blacklisted template' do
+      expect(subject).to render_template :blacklisted
+    end
+  end
+
+  describe '#show' do
+    context 'with existing project that has been blacklisted' do
+      let(:blacklisted_project) { create(:project, host: "github", full_name: "mitsuhiko/flask") }
+      let(:subject) { get :show, service: "github", repo: blacklisted_project.full_name }
+
+      it 'renders blacklisted template' do
+        expect(subject).to render_template :blacklisted
+      end
+    end
+  end
 end
diff --git a/spec/lib/blacklist_spec.rb b/spec/lib/blacklist_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+describe Blacklist do
+  it 'handles blacklisted URLs' do
+    urls = [
+      "https://github.com/author/notips",
+      "https://bitbucket.org/author/notips",
+      "https://github.com/notips/*",
+      "https://bitbucket.org/notips/*",
+    ]
+
+    list = Blacklist.new(urls)
+
+    # Blacklisted projects.
+    expect(list.include?("https://github.com/author/notips")).to eq(true)
+    expect(list.include?("http://github.com/author/notips?tips=true")).to eq(true)
+    expect(list.include?("https://bitbucket.org/author/notips")).to eq(true)
+    expect(list.include?("github.com/author/notips")).to eq(true)
+    expect(list.include?("author/notips")).to eq(true)
+
+    # Non-blacklisted projects.
+    expect(list.include?("https://github.com/author/tipme")).to eq(false)
+    expect(list.include?("https://bitbucket.org/author/tipme")).to eq(false)
+
+    # Blacklisted authors.
+    expect(list.include?("https://github.com/notips/tipme")).to eq(true)
+    expect(list.include?("https://bitbucket.org/notips/tipme")).to eq(true)
+  end
+end
diff --git a/spec/models/project_spec.rb b/spec/models/project_spec.rb
@@ -39,4 +39,4 @@
       end
     end
   end
-end
+end
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		# Load the blacklist.
		BLACKLIST \|\|= Blacklist.new(YAML.load_file("config/blacklist.yml"))
-Original file line number
+Diff line change
@@ Expand Up / @@ -39,4 +39,4 @@ @@
           end
         end
       end
-    end
+    end