Add Dockerfile. (#49)

* Add Dockerfile for testing.

* Add coc-json, coc-snippets, move to tools

tools/Dockerfile

@@ -0,0 +1,99 @@
+# Dockerfile creates two system users (vim, nvim)
+#
+# vim user:
+# * configured for vim with /home/vim/.vimrc
+# * vim-plug installed into /home/.vim/
+#
+# nvim user:
+# * configured for neovim with /home/nvim/.config/nvim/init.vim
+# * vim-plug installed into /home/nvim/.local/share/nvim/
+#
+# Plugins enabled by default:
+# * neoclide/coc.nvim
+# * bling/vim-airline
+# * sheerun/vim-polyglot
+# * coc-powershell (coc.nvim plugin)
+#
+# Both vim and neovim configurations are set with pwsh as default shell.
+#
+# Default container user is root with /tmp as WORKDIR.
+#
+# To test with neovim run:
+# runuser -l nvim -c 'nvim test.ps1'
+#
+# To test with vim run:
+# runuser -l vim -c 'vim test.ps1'
+#
+# You can also switch into each user by running:
+#
+# su - nvim
+# su - vim
+
+FROM mcr.microsoft.com/powershell:latest
+ARG DEBIAN_FRONTEND=noninteractive
+
+WORKDIR /tmp
+
+# Install base packages
+RUN apt-get update -qq
+RUN apt-get install wget vim git curl software-properties-common -y
+
+# Install neovim
+RUN add-apt-repository ppa:neovim-ppa/stable
+RUN apt-get update -qq
+RUN apt-get install neovim -y
+
+# Install nodejs
+RUN bash -c 'bash <(curl -sL install-node.now.sh/lts) --yes'
+
+# Create paswordless vim and nvim users
+RUN adduser --disabled-password --gecos "" vim
+RUN adduser --disabled-password --gecos "" nvim
+
+# Configure vim as vim user.
+USER vim
+WORKDIR /home/vim
+
+RUN curl -sfLo ~/.vim/autoload/plug.vim --create-dirs \
+    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+
+RUN echo "call plug#begin('~/.vim/plugged')\n\
+Plug 'neoclide/coc.nvim', {'branch': 'release'}\n\
+Plug 'bling/vim-airline'\n\
+Plug 'sheerun/vim-polyglot'\n\
+call plug#end()\n\
+autocmd FileType ps1 setlocal shell=pwsh" >> ~/.vimrc
+
+RUN vim +PlugInstall +qall
+RUN vim -c 'CocInstall -sync coc-powershell coc-snippets coc-json|q'
+
+RUN rm -rf /tmp/coc-nvim*
+
+
+# Configure nvim as nvim user.
+USER nvim
+WORKDIR /home/nvim
+
+RUN curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs \
+    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
+
+RUN mkdir -p ~/.config/nvim
+
+RUN echo "call plug#begin('~/.local/share/nvim/plugged')\n\
+Plug 'neoclide/coc.nvim', {'branch': 'release'}\n\
+Plug 'bling/vim-airline'\n\
+Plug 'sheerun/vim-polyglot'\n\
+call plug#end()\n\
+autocmd FileType ps1 setlocal shell=pwsh" >> ~/.config/nvim/init.vim
+
+RUN nvim +PlugInstall +qall
+RUN nvim -c 'CocInstall -sync coc-powershell coc-snippets coc-json|q'
+
+USER root
+RUN usermod -s /usr/bin/pwsh vim
+RUN usermod -s /usr/bin/pwsh nvim
+
+RUN rm -rf /tmp/*
+WORKDIR /tmp
+
+CMD ["/usr/bin/pwsh"]