Pin versions for everything

Dockerfile

@@ -1,17 +1,20 @@
-FROM tweekmonster/vim-testbed:latest
+FROM testbed/vim:17
 
-ENV PACKAGES="\
+# add packages
-    bash \
+RUN apk --no-cache add bash=~5.0
-    git \
+RUN apk --no-cache add git=~2.22
-    python3 \
+RUN apk --no-cache add python3=~3.7
-"
-RUN apk --update add $PACKAGES && \
-    rm -rf /var/cache/apk/* /tmp/* /var/tmp/*
 
-RUN pip3 install --upgrade pip setuptools
+# get vint for linting
-RUN pip3 install vim-vint
+RUN pip3 install vim-vint==0.3.21
-RUN git clone https://github.com/junegunn/vader.vim vader
 
+# get vader for unit tests
+RUN git clone -n https://github.com/junegunn/vader.vim /vader
+WORKDIR /vader
+RUN git checkout de8a976f1eae2c2b680604205c3e8b5c8882493c
+
+# build vim and neovim versions we want to test
+WORKDIR /
 RUN install_vim -tag v7.3.429 -name vim_7.3.429 -build \
                 -tag v7.4.1099 -name vim_7.4.1099 -build \
                 -tag v7.4.1546 -name vim_7.4.1546 -build \