Use choosenim for Travis

.travis.yml

@@ -1,9 +1,12 @@
-sudo: false
-language: c
 os:
   - linux
   - osx
-dist: trusty
+
+language: c
+
+env:
+  - BRANCH=devel
+
 addons:
   apt:
     packages:
@@ -12,21 +15,12 @@ addons:
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then HOMEBREW_NO_AUTO_UPDATE=1 brew install libssh2; fi
 
-before_script:
+install:
-  - curl -u $TOKEN -o latest.json --silent https://api.github.com/repos/nim-lang/nightlies/releases/latest
+  - export CHOOSENIM_CHOOSE_VERSION=$BRANCH
-  - export RELEASE=`cat latest.json | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/'`
+  - |
-  - export TXZ=`cat latest.json | grep '"name":' | sed -E 's/.*"([^"]+)".*/\1/' | grep linux | tail -n 1`
+      curl https://nim-lang.org/choosenim/init.sh -sSf > init.sh
-  - export VERSION=`echo $TXZ | cut -d"-" -f 2,2`
+      sh init.sh -y
-  - echo "RELEASE = $RELEASE, TXZ = $TXZ, VERSION = $VERSION"
+  - export PATH=$HOME/.nimble/bin:$PATH
-  - curl -L --silent -o $TXZ "https://github.com/nim-lang/nightlies/releases/download/$RELEASE/$TXZ"
-  - tar xf $TXZ
-  - cd nim-$VERSION
-  - sh build.sh
-  - bin/nim c koch
-  - ./koch boot -d:release
-  - ./koch nimble
-  - export PATH=$(pwd)/bin:~/.nimble/bin:$PATH
-  - cd ..
 
 script:
   - nimble install -y