chore(travis): Test both the released version of core as well as master. Test downstream projects, but do not fail.

Author: christopherthielen

.gitignore

@@ -1,15 +1,10 @@
-.DS_Store
-.tslintrc
+**/.*
 tslint.json
-.eslintrc
-.vscode
-.idea
 *.ipr
 *.iml
 *.iws
 lib/
 lib-esm/
 _bundles/
 node_modules/
-downstream_projects
 _doc

.npmignore

@@ -1,4 +1,4 @@
-.*
+**/.*
 **/webpack.config.js
 **/webpack.example.js
 **/tsconfig.json

.travis.yml

@@ -1,42 +1,40 @@
 language: node_js
 node_js: '8.9.1'
 
-cache:
-  yarn: true
-  directories:
-  - node_modules
-  - downstream_projects
-
-before_install: 
-- curl -o- -L https://yarnpkg.com/install.sh | bash
-- export PATH="$HOME/.yarn/bin:$PATH"
-- yarn global add greenkeeper-lockfile@1 yalc
-
+before_install: yarn global add greenkeeper-lockfile@1 yalc
 install: yarn --check-files
 
 before_script: greenkeeper-lockfile-update && greenkeeper-lockfile-upload
-
 script:
-- if [ "x${DOWNSTREAM_PKGS}x" != "xx" ] ; then npm run test:downstream ; else tsc && npm test ; fi
+# When CORE_BRANCH env variable is set, it will fetch, build, and test using that branch of @uirouter/core
+- if [ "x${CORE_BRANCH}x" != "xx" ] ; then ./node_modules/.bin/publish_yalc_package .downstream_cache/core https://github.com/ui-router/core.git && yalc add @uirouter/core ; fi
+# If DOWNSTREAM or DOWNSTREAM_PKGS is set, run downstream packages' tests instead
+- if [ "x${DOWNSTREAM_PKGS}${DOWNSTREAM}x" != "xx" ] ; then yarn test:downstream ; else tsc && yarn test; fi
 
 env:
   global:
     secure: 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
   matrix:
-  - DOWNSTREAM_PKGS=
-  - DOWNSTREAM_PKGS=sample-app-react
+  - CORE_BRANCH=
+  - CORE_BRANCH=master
+  - CORE_BRANCH=master UPSTREAM_PKGS=@uirouter/core DOWNSTREAM=true
+  - DOWNSTREAM=true
 
 matrix:
   fast_finish: true
   allow_failures:
-  - env: DOWNSTREAM_PKGS=sample-app-react
-
-sudo: false
-
-git:
-  depth: 3
+  - env: CORE_BRANCH=
+  - env: DOWNSTREAM=true
+  - env: CORE_BRANCH=master UPSTREAM_PKGS=@uirouter/core DOWNSTREAM=true
 
 notifications:
   slack:
     secure: 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
 
+sudo: false
+
+cache:
+  yarn: true
+  directories:
+  - node_modules
+  - .downstream_cache