.travis.yml

cache:
  directories:
    - sysconfcpus
install:
  # The elm compiler incorrectly detects the number of available cores
  # and takes minutes instead of milliseconds to compile the code.
  #
  # Fix sourced from:
  # https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
  - |
    if [ ! -d sysconfcpus/bin ];
    then
      git clone https://github.com/obmarg/libsysconfcpus.git; 
      cd libsysconfcpus;
      ./configure --prefix=$TRAVIS_BUILD_DIR/sysconfcpus;
      make && make install;
      cd ..;
    fi
  - npm install -g elm@0.18.0 elm-test@0.18.12 elm-format@exp

script:
  # Check if the autoformatter was applied
  - elm-format --validate src
  # The autoformatter allows you to write arbitrarily long lines
  # if you do not add a linebreak to the statement, catch these
  # cases
  - |
    FILE="./src/NaturalOrdering.elm"
    ALLOWED=80 MAX=0 LINENUM=0 DENY_FROM=4 IFS=
    
    while read -r line; do
       LINENUM=$(( $LINENUM + 1 ))
       if [ $LINENUM -lt $DENY_FROM ]; then continue; fi
       if [ ${#line} -gt $MAX ]; then MAX=${#line}; fi
       if [ ${#line} -gt $ALLOWED ]; then
          printf "[FILE $FILE; LINE $LINENUM] Maximal line length should be $ALLOWED. Actual: ${#line}\n"
       fi
    done < "$FILE"
    
    if [ $MAX -gt $ALLOWED ]; then
       printf "===\n"
       printf "Code rejected because lines are longer than allowed\n"
       exit 1
    fi
  # Check if the program compiles
  - $TRAVIS_BUILD_DIR/sysconfcpus/bin/sysconfcpus -n 2 elm-make --warn --output=/dev/null --yes
  # Execute unit and fuzz tests
  - $TRAVIS_BUILD_DIR/sysconfcpus/bin/sysconfcpus -n 2 elm-test