Dockerfile: Reimport hard code hack (sjtug#321)

Signed-off-by: Ce Gao <[email protected]>

Dockerfile

@@ -1,6 +1,10 @@
 FROM ubuntu:16.04
 LABEL maintainer="Ce Gao(gaocegege) <[email protected]>"
 
+ARG VERSION=${version:-"2018"}
+ARG PLATFORM=${platform:-"x86_64-linux"}
+
+ENV PATH=${PATH}:"/usr/local/texlive/${VERSION}/bin/${PLATFORM}"
 ENV REMOTE="http://mirror.ctan.org/systems/texlive/tlnet"
 ENV INSTALL="/tmp/install-texlive"
 
@@ -27,14 +31,9 @@ RUN apt-get update && apt-get install -y \
 RUN mkdir -p ${INSTALL} \
     && curl -sSL $REMOTE/install-tl-unx.tar.gz | tar -xzv -C ${INSTALL} --strip-components=1
 
-COPY .ci/tl.profile /etc/tl.profile
+COPY .ci/ /etc/
 RUN ${INSTALL}/install-tl -profile /etc/tl.profile
 
-RUN export VERSION=$($INSTALL/install-tl --version | grep 'version' | grep -o '[0-9]\{4\}')
-RUN export PLATFORM=$($INSTALL/install-tl --print-platform)
-RUN export TEXBIN="/usr/local/texlive/${VERSION}/bin/${PLATFORM}"
-RUN export "PATH=$TEXBIN:$PATH"
-
 RUN tlmgr install latexmk ulem
 
 WORKDIR /workdir