From 40dec5346b46fb96a4078910ddea300714e0b091 Mon Sep 17 00:00:00 2001
From: soundstep <romu@soundstep.com>
Date: Fri, 22 Jan 2016 13:32:31 +0000
Subject: [PATCH] filter-tags - Added capability to exclude tags with a regular
 expression by filtering names.

---
 lib/github_changelog_generator/fetcher.rb | 14 ++++++++++++++
 lib/github_changelog_generator/parser.rb  |  3 +++
 2 files changed, 17 insertions(+)

diff --git a/lib/github_changelog_generator/fetcher.rb b/lib/github_changelog_generator/fetcher.rb
index eef3e6d..1a6d61c 100644
--- a/lib/github_changelog_generator/fetcher.rb
+++ b/lib/github_changelog_generator/fetcher.rb
@@ -68,11 +68,25 @@ module GitHubChangelogGenerator
       response = @github.repos.tags @options[:user], @options[:project]
       page_i = 0
       count_pages = response.count_pages
+
       response.each_page do |page|
+
+        if @options[:filter_tags]
+          body_new = []
+          reg = Regexp.new @options[:filter_tags]
+          page.body.each_with_index do |tag,index|
+            if !(tag.name =~ reg)
+              body_new << tag
+            end
+          end
+          page.body = body_new
+        end
+
         page_i += PER_PAGE_NUMBER
         print_in_same_line("Fetching tags... #{page_i}/#{count_pages * PER_PAGE_NUMBER}")
         tags.concat(page)
       end
+
       print_empty_line
 
       if tags.count == 0
diff --git a/lib/github_changelog_generator/parser.rb b/lib/github_changelog_generator/parser.rb
index 2f16d9b..4c79889 100644
--- a/lib/github_changelog_generator/parser.rb
+++ b/lib/github_changelog_generator/parser.rb
@@ -116,6 +116,9 @@ module GitHubChangelogGenerator
         opts.on("--between-tags  x,y,z", Array, "Change log will be filled only between specified tags") do |list|
           options[:between_tags] = list
         end
+        opts.on("--filter-tags [REGEX]", "Apply a regular expression on tag names so that they can be excluded, for example: --filter-tags \".*\+\d{1,}\" ") do |last|
+          options[:filter_tags] = last
+        end
         opts.on("--exclude-tags  x,y,z", Array, "Change log will exclude specified tags") do |list|
           options[:exclude_tags] = list
         end