Fix espeak voice downloads in Dockerfile

SVN support go bye bye

Dockerfile

@@ -31,7 +31,7 @@ RUN apt-get update && apt-get upgrade -y && \
     # Build and install mbrola
     git clone https://github.com/numediart/MBROLA --depth 1 && cd MBROLA && make && cp Bin/mbrola /usr/bin/mbrola && cd .. && rm -rf MBROLA && \
     # Download the mbrola voices to /usr/share/mbrola.
-    svn export https://github.com/numediart/MBROLA-voices/trunk/data /usr/share/mbrola
+    ./sparse-checkout.sh https://github.com/numediart/MBROLA-voices /usr/share/mbrola && mv /usr/share/mbrola/data/* /usr/share/mbrola && rm -r /usr/share/mbrola/data
 
 # Download tini to avoid zombie processes
 ADD https://github.com/krallin/tini/releases/latest/download/tini /usr/local/bin/tini

sparse-checkout.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/bash
+
+rurl="$1" localdir="$2" && shift 2
+
+mkdir -p "$localdir"
+cd "$localdir"
+
+git init
+git remote add -f origin "$rurl"
+
+git config core.sparseCheckout true
+
+# Loops over remaining args
+for i; do
+echo "$i" >> .git/info/sparse-checkout
+done
+
+git pull --depth 1 origin master