fix build error

(cherry picked from commit 1b1ea35ac9a50305bbfb9f0cdb846a556c50e05b)

Fix-build-error.patch

@@ -0,0 +1,36 @@
+From 39d75899dceb37a2a9d4bcd8beec980b60e248f0 Mon Sep 17 00:00:00 2001
+From: Andreas Schwarz <andreas@andreas-s.net>
+Date: Sat, 23 Jan 2021 23:17:53 +0100
+Subject: [PATCH] Remove URI.escape (deprecated in Ruby 3.0)
+
+---
+ lib/wikicloth/extensions/math.rb | 2 +-
+ lib/wikicloth/wiki_buffer/var.rb | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/lib/wikicloth/extensions/math.rb b/lib/wikicloth/extensions/math.rb
+index 41dfef7..15a4c25 100644
+--- a/lib/wikicloth/extensions/math.rb
++++ b/lib/wikicloth/extensions/math.rb
+@@ -34,7 +34,7 @@ class MathExtension < Extension
+         end
+       else
+         # if blahtex does not exist fallback to google charts api
+-        encoded_string = URI.escape(buffer.element_content, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
++        encoded_string = URI.encode_www_form_component(buffer.element_content)
+         "<img src=\"https://chart.googleapis.com/chart?cht=tx&chl=#{encoded_string}\" />"
+       end
+     end
+diff --git a/lib/wikicloth/wiki_buffer/var.rb b/lib/wikicloth/wiki_buffer/var.rb
+index 7a39527..1b392b8 100644
+--- a/lib/wikicloth/wiki_buffer/var.rb
++++ b/lib/wikicloth/wiki_buffer/var.rb
+@@ -167,7 +167,7 @@ def default_functions(name,params)
+       @options[:params][params.first] = params[1]
+       ""
+     when "urlencode"
+-      URI.escape(params.first, Regexp.new("[^#{URI::PATTERN::UNRESERVED}]"))
++      URI.encode_www_form_component(params.first)
+     when "lc"
+       params.first.downcase
+     when "uc"

rubygem-wikicloth-0.8.3-add-a-condition-to-avoid-FrozenError.patch

@@ -0,0 +1,27 @@
+From 74f71ccf296c2b01e1a8455b4107b02316a7c7fb Mon Sep 17 00:00:00 2001
+From: Peter Zhang <zpregister@gmail.com>
+Date: Sat, 21 Mar 2020 00:38:14 +0100
+Subject: add a condition to avoid FrozenError
+
+nil.to_s in Ruby 2.7.0 now always return a frozen String ""
+a=nil.to_s
+a.gsub!(//,'')
+will raise a FrozenError (can't modify frozen String: "")
+---
+ lib/wikicloth/wiki_buffer/var.rb | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/wikicloth/wiki_buffer/var.rb b/lib/wikicloth/wiki_buffer/var.rb
+index 2e0f5d1..7a39527 100644
+--- a/lib/wikicloth/wiki_buffer/var.rb
++++ b/lib/wikicloth/wiki_buffer/var.rb
+@@ -80,7 +80,7 @@ def to_html
+ 
+         ret = @options[:link_handler].include_resource(key,key_options).to_s
+ 
+-        ret.gsub!(/<!--(.|\s)*?-->/,"")
++        ret.gsub!(/<!--(.|\s)*?-->/,"") unless ret.frozen?
+         count = 0
+         tag_attr = key_options.collect { |p|
+           if p.instance_of?(Hash)
+

rubygem-wikicloth.spec

@@ -1,15 +1,17 @@
 %global gem_name wikicloth
 Name:                rubygem-%{gem_name}
 Version:             0.8.0
-Release:             1
+Release:             2
 Summary:             Mediawiki parser
 License:             MIT
 URL:                 https://github.com/nricciar/wikicloth
 Source0:             https://rubygems.org/gems/wikicloth-%{version}.gem
 Patch0:              rubygem-wikicloth-0.8.0-minitest.patch
+Patch1:              rubygem-wikicloth-0.8.3-add-a-condition-to-avoid-FrozenError.patch
+Patch2:              Fix-build-error.patch
 Requires:            ruby(release) ruby(rubygems) rubygem(builder) rubygem(expression_parser)
 BuildRequires:       ruby(release) rubygems-devel rubygem(activesupport) rubygem(builder)
-BuildRequires:       rubygem(expression_parser)
+BuildRequires:       rubygem(expression_parser)  rubygem(rexml) 
 BuildArch:           noarch
 Provides:            rubygem(%{gem_name}) = %{version}
 %description
@@ -27,6 +29,8 @@ gem unpack %{SOURCE0}
 %setup -q -D -T -n  %{gem_name}-%{version}
 gem spec %{SOURCE0} -l --ruby > %{gem_name}.gemspec
 %patch0 -p1
+%patch1 -p1
+%patch2 -p1
 for f in .gitignore .travis.yml Gemfile Rakefile run_tests.rb tasks/wikicloth_tasks.rake; do
   rm $f
   sed -i "s|\"$f\".freeze,||g" %{gem_name}.gemspec
@@ -65,5 +69,8 @@ popd
 %{gem_instdir}/sample_documents
 
 %changelog
+* Wed Feb 9 2022 yanan li <liyanan32@huawei.com> - 0.8.0-2
+- Fix build error
+
 * Sat Aug 8 2020 yanan li <liyanan032@huawei.com> - 0.8.0-1
 - Package init