## Building Nim projects on Travis CI

Building your code on Travis CI is useful to check regressions against the master and devel branches of Nim.
Same for your code documentation.

Detailed guide, which the following example originates from: +
http://blaxpirit.com/blog/22/advanced-uses-of-travis-ci-with-nim.html[Advanced uses of Travis CI with Nim]

[source,yaml]
----
# Copied from https://github.com/nim-lang/Nim/wiki/TravisCI
language: c
env:
  # Build and test against the master and devel branches of Nim
  - BRANCH=master
  - BRANCH=devel
compiler:
  # Build and test using both gcc and clang
  - gcc
  - clang
matrix:
  allow_failures:
    # Ignore failures when building against the devel Nim branch
    - env: BRANCH=devel
  fast_finish: true
install:
  - |
    if [ ! -x nim-$BRANCH/bin/nim ]; then
      git clone -b $BRANCH --depth 1 git://github.com/nim-lang/nim nim-$BRANCH/
      cd nim-$BRANCH
      git clone --depth 1 git://github.com/nim-lang/csources csources/
      cd csources
      sh build.sh
      cd ..
      rm -rf csources
      bin/nim c koch
      ./koch boot -d:release
    else
      cd nim-$BRANCH
      git fetch origin
      if ! git merge FETCH_HEAD | grep "Already up-to-date"; then
        bin/nim c koch
        ./koch boot -d:release
      fi
    fi
    cd ..
before_script:
    - export PATH="nim-$BRANCH/bin${PATH:+:$PATH}"
script:
    # Replace uppercase strings!
    - nim c --cc:$CC --verbosity:0 -r MYFILE.nim
    # Optional: build docs. 
    - nim doc --docSeeSrcUrl:https://github.com/AUTHOR/MYPROJECT/blob/master --project MYFILE.nim
cache:
  directories:
    - nim-master
    - nim-devel
branches:
  except:
    - gh-pages

----