Travis for Haskell

.travis.yml

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+# From http://docs.haskellstack.org/en/stable/GUIDE.html#travis-with-caching
+# To test, make a test branch and rename this to `.travis.yml`
+
+# Use new container infrastructure to enable caching
+sudo: false
+
+# Choose a lightweight base image; we provide our own build tools.
+language: c
+
+# GHC depends on GMP. You can add other dependencies here as well.
+addons:
+  apt:
+    packages:
+    - libgmp-dev
+
+# The different configurations we want to test. You could also do things like
+# change flags or use --stack-yaml to point to a different file.
+
+before_install:
+# Download and unpack the stack executable
+- cd haskell
+- mkdir -p ~/.local/bin
+- export PATH=$HOME/.local/bin:$PATH
+- travis_retry curl -L https://www.stackage.org/stack/linux-x86_64 | tar xz --wildcards --strip-components=1 -C ~/.local/bin '*/stack'
+
+# This line does all of the work: installs GHC if necessary, build the library,
+# executables, and test suites, and runs the test suites. --no-terminal works
+# around some quirks in Travis's terminal implementation.
+script:
+    - stack --no-terminal --install-ghc build
+    - stack exec skynet +RTS -N
+
+# Caching so the next build will be fast too.
+cache:
+  directories:
+  - $HOME/.stack