Ruby: fix bug (#36)

* fix ruby

* skip rbenv/ruby-build

src/ruby/install.sh

@@ -192,13 +192,14 @@ fi
 find_version_from_git_tags RUBY_VERSION "https://github.com/ruby/ruby" "tags/v" "_"
 
 # Just install Ruby if RVM already installed
-if [ -d "/usr/local/rvm" ]; then
+if [ rvm --version != ""]; then
     echo "Ruby Version Manager already exists."
     if [ "${RUBY_VERSION}" != "none" ]; then
         echo "Installing specified Ruby version."
-        su ${USERNAME} -c "&& rvm install ruby ${RUBY_VERSION}"
+        su ${USERNAME} -c "rvm install ruby ${RUBY_VERSION}"
     fi
     SKIP_GEM_INSTALL="false"
+    SKIP_RBENV_RBUILD="true"
 else
     # Install RVM
     receive_gpg_keys RVM_GPG_KEYS
@@ -240,28 +241,30 @@ fi
 updaterc "if ! grep rvm_silence_path_mismatch_check_flag \$HOME/.rvmrc > /dev/null 2>&1; then echo 'rvm_silence_path_mismatch_check_flag=1' >> \$HOME/.rvmrc; fi\nsource /usr/local/rvm/scripts/rvm > /dev/null 2>&1"
 
 # Install rbenv/ruby-build for good measure
-git clone --depth=1 \
-    -c core.eol=lf \
-    -c core.autocrlf=false \
-    -c fsck.zeroPaddedFilemode=ignore \
-    -c fetch.fsck.zeroPaddedFilemode=ignore \
-    -c receive.fsck.zeroPaddedFilemode=ignore \
-    https://github.com/rbenv/rbenv.git /usr/local/share/rbenv
-ln -s /usr/local/share/rbenv/bin/rbenv /usr/local/bin
-updaterc 'eval "$(rbenv init -)"'
-git clone --depth=1 \
-    -c core.eol=lf \
-    -c core.autocrlf=false \
-    -c fsck.zeroPaddedFilemode=ignore \
-    -c fetch.fsck.zeroPaddedFilemode=ignore \
-    -c receive.fsck.zeroPaddedFilemode=ignore \
-    https://github.com/rbenv/ruby-build.git /usr/local/share/ruby-build
-mkdir -p /root/.rbenv/plugins
-ln -s /usr/local/share/ruby-build /root/.rbenv/plugins/ruby-build
-if [ "${USERNAME}" != "root" ]; then
-    mkdir -p /home/${USERNAME}/.rbenv/plugins
-    chown -R ${USERNAME} /home/${USERNAME}/.rbenv
-    ln -s /usr/local/share/ruby-build /home/${USERNAME}/.rbenv/plugins/ruby-build
+if [ ${SKIP_RBENV_RBUILD} != "true"] ; then
+    git clone --depth=1 \
+        -c core.eol=lf \
+        -c core.autocrlf=false \
+        -c fsck.zeroPaddedFilemode=ignore \
+        -c fetch.fsck.zeroPaddedFilemode=ignore \
+        -c receive.fsck.zeroPaddedFilemode=ignore \
+        https://github.com/rbenv/rbenv.git /usr/local/share/rbenv
+    ln -s /usr/local/share/rbenv/bin/rbenv /usr/local/bin
+    updaterc 'eval "$(rbenv init -)"'
+    git clone --depth=1 \
+        -c core.eol=lf \
+        -c core.autocrlf=false \
+        -c fsck.zeroPaddedFilemode=ignore \
+        -c fetch.fsck.zeroPaddedFilemode=ignore \
+        -c receive.fsck.zeroPaddedFilemode=ignore \
+        https://github.com/rbenv/ruby-build.git /usr/local/share/ruby-build
+    mkdir -p /root/.rbenv/plugins
+    ln -s /usr/local/share/ruby-build /root/.rbenv/plugins/ruby-build
+    if [ "${USERNAME}" != "root" ]; then
+        mkdir -p /home/${USERNAME}/.rbenv/plugins
+        chown -R ${USERNAME} /home/${USERNAME}/.rbenv
+        ln -s /usr/local/share/ruby-build /home/${USERNAME}/.rbenv/plugins/ruby-build
+    fi
 fi
 
 # Clean up