switch to go modules

Signed-off-by: Denys Smirnov <denys@sourced.tech>

.travis.yml

@@ -1,20 +1,18 @@
 language: go
 
 go:
-  - '1.11'
+  - '1.12.x'
 
 services:
   - docker
 
 env:
-  - BBLFSHD_VERSION=v2.11.8
+  global:
+    - GO111MODULE=on
+    - BBLFSHD_VERSION=v2.12.1
 
 install:
-  - curl -L https://github.com/golang/dep/releases/download/v0.4.1/dep-linux-amd64 > $GOPATH/bin/dep
-  - chmod +x $GOPATH/bin/dep
-  - dep ensure --vendor-only
-  - go get ./vendor/gopkg.in/bblfsh/sdk.v2/cmd/...
-  - go install ./vendor/gopkg.in/bblfsh/sdk.v2/cmd/...
+  - go mod download
   - docker pull bblfsh/bblfshd:$BBLFSHD_VERSION
 
 script:
@@ -23,4 +21,4 @@ script:
   - go run test.go --bblfshd $BBLFSHD_VERSION ci-build
 
 after_success:
-  - bblfsh-sdk push ci-build
+  - go run github.com/bblfsh/sdk/v3/cmd/bblfsh-sdk push ci-build

Dockerfile

@@ -1,6 +1,13 @@
+# This file can be used directly with Docker.
+#
 # Prerequisites:
-#   dep ensure --vendor-only
+#   go mod vendor
 #   bblfsh-sdk release
+#
+# However, the preferred way is:
+#   go run ./build.go driver:tag
+#
+# This will regenerate all necessary files before building the driver.
 
 #==============================
 # Stage 1: Native Driver Build
@@ -35,11 +42,14 @@ FROM golang:1.10-alpine as driver
 ENV DRIVER_REPO=github.com/bblfsh/cpp-driver
 ENV DRIVER_REPO_PATH=/go/src/$DRIVER_REPO
 
+ADD go.* $DRIVER_REPO_PATH/
 ADD vendor $DRIVER_REPO_PATH/vendor
 ADD driver $DRIVER_REPO_PATH/driver
 
 WORKDIR $DRIVER_REPO_PATH/
 
+ENV GO111MODULE=on GOFLAGS=-mod=vendor
+
 # build server binary
 RUN go build -o /tmp/driver ./driver/main.go
 # build tests