added Docker'ised dev env support

README.md

@@ -206,6 +206,10 @@ Contributing
   - ```rake acceptance```
   - ```pronto run```
 
+  Alternatively, if you're in a [Docker](https://www.docker.com)ised environment,
+  don't care about installing anything locally, and don't really need __pronto__
+  -- just run `bin/test` instead.
+
 8. Commit your changes
   - ```git commit -am "Your commit message"```
 

bin/test

@@ -0,0 +1,11 @@
+#!/bin/bash -e
+test "$#" -ne 0 && echo "Unsupported args: $@" >&2 && exit 145
+cd "$( dirname "${BASH_SOURCE[0]}" )"/..
+
+export COMPOSE_FILE=test/docker-compose.yml
+export COMPOSE_PROJECT_NAME=highline_dev
+
+docker-compose rm -svf
+docker-compose build --force-rm
+
+docker-compose run --rm tester && docker-compose rm -svf || ( docker-compose logs && exit 1 )

test/Dockerfile

@@ -0,0 +1,15 @@
+FROM ruby
+
+WORKDIR /highline
+
+
+RUN bash -ec 'apt update; apt -y install cmake'
+
+ADD Gemfile highline.gemspec .git* ./
+ADD lib/highline/version.rb ./lib/highline/version.rb
+RUN bundle install
+
+ADD . .
+
+ENTRYPOINT ["bundle", "exec"]
+CMD ["bash", "-ec", "rake test; rake acceptance"]

test/docker-compose.yml

@@ -0,0 +1,6 @@
+version: '2.1'
+services:
+  tester:
+    build:
+      context: ..
+      dockerfile: test/Dockerfile