travis: optimize lint (#49)

* travis: lint sub-dirs except /vendors + exit with error

* try with `test -z`

* lint before build, but display errors after

* comments

* travis doesn't like the bracket notation

* remove intentional lint errors

* fix condition and error code

* Re-add some linting errors

* Revert "Re-add some linting errors"

This reverts commit aa73820.

* make error more visible

* Remove "FAIL: ". Is that a travis bug?

* work around YAML spec restriction

"colon followed by space" is parsed as YAML syntax.

Author: Aurélien Gasser

.travis.yml

@@ -22,6 +22,7 @@ before_script:
 
 script:
   - cd chaincode
-  - golint
   - go test -v ./...
-  - go build -v
+  - golint_stdout="`go list ./... | grep -v /vendor/ | xargs golint`"
+  - go build -v  
+  - test -z "$golint_stdout" || (echo -e "FAIL:" "golint error(s):\n$golint_stdout" && exit 1)