Install dvisvgm manually and fix ruby encodign issues

Dockerfile

@@ -15,21 +15,51 @@ RUN apt-get update && \
     make \
     tidy \
     pandoc \
-    dvisvgm \
     zip \
     git \
     wget \
     ruby3.1 \
     ruby-dev \
     imagemagick \
-    build-essential
+    rsync \
+    wget \
+    perl \
+    xzdec \
+    # dvisvgm dependencies
+    build-essential \
+    fonts-texgyre \
+    fontconfig \
+    libfontconfig1 \
+    libkpathsea-dev \
+    libptexenc-dev \
+    libsynctex-dev \
+    libx11-dev \
+    libxmu-dev \
+    libxaw7-dev \
+    libxt-dev \
+    libxft-dev \
+    libwoff-dev
 
 # Install TeX
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     texlive-full \
     texlive-luatex
 
+# Compile latest dvisvgm
+RUN wget https://github.com/mgieseki/dvisvgm/releases/download/3.1.2/dvisvgm-3.1.2.tar.gz && \
+    mv dvisvgm-3.1.2.tar.gz dvisvgm.tar.gz && \
+    tar -xzf dvisvgm.tar.gz && \
+    cd dvisvgm-* && \
+    ./configure && \
+    make && \
+    make install
+
+# Make sure everything is UTF-8
+RUN echo "export LC_ALL=en_US.UTF-8" >> /root/.bashrc && \
+    echo "export LANG=en_US.UTF-8" >> /root/.bashrc
+
+
 WORKDIR /root
 
 # Install ruby for the website build process

website/modify_build.rb

@@ -27,7 +27,7 @@ def create_sitemap
       html_file_name = fn.split("/")[-1]
       content += "#{HOST}/#{html_file_name}\n"
     end
-    File.open("#{build_dir}/sitemap.txt", 'w') { |file| file.write(content) }
+    File.open("#{build_dir}/sitemap.txt", 'w:UTF-8') { |file| file.write(content) }
   end
 
   def build_latex_html
@@ -41,7 +41,7 @@ def build_latex_html
   end
 
   def modify_file(filename)
-    orig_text = File.read(filename)
+    orig_text = File.read(filename, encoding: "UTF-8")
     text = fix_double_slashes(orig_text)
     text = fix_navigation_bar(text)
     text = fix_titles(text)
@@ -61,7 +61,7 @@ def modify_file(filename)
     text = add_anchors_to_headers(text)
     text = fix_menus_list_figures_tables(text) if is_list_figures_tables?(filename)
     text = fix_list_of_figures_tables_display(text) if is_list_figures_tables?(filename)
-    File.open(filename, "w") {|file| file.puts text }
+    File.open(filename, "w:UTF-8") {|file| file.puts text }
   end
 
   def is_cover_page?(filename)