feat(test): Add testing with Docker

Closes: #4

.dockerignore

@@ -0,0 +1,8 @@
+*~
+.DS_Store
+.git/
+.gitignore
+venv*/
+*/.git/
+*/.gitignore
+*/venv*/

Dockerfile

@@ -0,0 +1,27 @@
+FROM alpine:3.4
+
+MAINTAINER Derek M. Frank <derekmfrank at gmail dot com>
+
+USER root
+
+# Install dependencies.
+RUN apk update && apk add \
+    bash \
+    git \
+    zsh
+
+# Add user.
+ENV HOME "/home/dot"
+ENV SHELL "/bin/zsh"
+ENV USER dot
+RUN adduser -h $HOME -s "$SHELL" -S -D "$USER"
+
+# Setup app.
+ENV DOTFILES "$HOME/.dotfiles"
+WORKDIR "$DOTFILES"
+COPY . "$DOTFILES"
+RUN chown -R "$USER" "$DOTFILES"
+
+USER "$USER"
+ENTRYPOINT ["./test/entrypoint.sh"]
+CMD ["docker"]

README.md

@@ -66,6 +66,28 @@ defaults, and so on. Tweak this script, and occasionally run `dot` from
 time to time to keep your environment fresh and up-to-date. You can find
 this script in `bin/`.
 
+## test
+
+Because you don't want to necessarily ruin your local environment
+everytime you make a change, let's use Docker.
+
+**Note:** you can only test the pieces of your dotfiles that will work
+in a Linux environment.  macOS specifics cannot be tested.
+
+### dependencies
+
+#### docker
+
+Be sure Docker is installed.
+
+##### macOS
+
+    brew cask install docker
+
+### run
+
+    ./test/run.sh
+
 ## bugs
 
 I want this to work for everyone; that means when you clone it down it should

test/entrypoint.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+cd "$(dirname "$0")/.."
+source 'script/bootstrap'
+
+NAME="$(uname -s)"
+RELEASE="$(uname -r)"
+
+if ([[ "$RELEASE" = *'boot2docker' ]] || [[ "$RELEASE" = *'moby' ]]) && \
+        [[ "$1" = 'docker' ]] ; then
+    echo
+    echo 'You are using docker!'
+    echo 'I will assume bootstrap is being run as an entrypoint...'
+    echo
+
+    if [[ "$SHELL" != *'zsh' ]]; then
+        SHELL="$(which zsh)"
+    fi
+    exec "$SHELL" -li
+fi