Use go modules and fix build

Now everything described in the README works with the new paths.

Signed-off-by: Shaun Verch <shaun@planetscale.com>

examples/are-you-alive/.gitignore

@@ -0,0 +1,2 @@
+vendor
+are-you-alive

examples/are-you-alive/README.md

@@ -52,8 +52,7 @@ and everything else will be set to defaults.
 ## Building
 
 ```
-dep ensure -v
-go build github.com/planetscale/are-you-alive/cmd/are-you-alive
+go build vitess.io/vitess/examples/are-you-alive/cmd/are-you-alive
 ```
 
 ## Testing
@@ -62,7 +61,6 @@ First, [install docker compose](https://docs.docker.com/compose/install/) and
 make sure it's working.  Then run:
 
 ```
-dep ensure -v
 docker-compose build
 docker-compose up
 ```

examples/are-you-alive/build/dev/reflex.conf

@@ -1,2 +1,2 @@
 # Rerun "go run" every time a ".go" file changes.
--r '(\.go$)' -s -- go run github.com/planetscale/are-you-alive/cmd/are-you-alive --initialize
+-r '(\.go$)' -s -- go run vitess.io/vitess/examples/are-you-alive/cmd/are-you-alive --initialize

examples/are-you-alive/build/release/Dockerfile

@@ -1,6 +1,6 @@
 FROM golang:1.12.5 AS build
-COPY . /go/src/github.com/planetscale/are-you-alive
-RUN CGO_ENABLED=0 go install github.com/planetscale/are-you-alive/cmd/are-you-alive
+COPY . /go/src/vitess.io/vitess/examples/are-you-alive
+RUN CGO_ENABLED=0 go install vitess.io/vitess/examples/are-you-alive/cmd/are-you-alive
 
 FROM debian:stretch-slim AS runtime
 COPY --from=build /go/bin/are-you-alive /go/bin/are-you-alive

examples/are-you-alive/cmd/are-you-alive/main.go

@@ -5,7 +5,6 @@ import (
 	"flag"
 	"fmt"
 	"github.com/go-sql-driver/mysql"
-	"github.com/planetscale/are-you-alive/pkg/client"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
@@ -16,6 +15,7 @@ import (
 	"os/signal"
 	"sync"
 	"time"
+	"vitess.io/vitess/examples/are-you-alive/pkg/client"
 )
 
 /*

examples/are-you-alive/docker-compose.yml

@@ -5,8 +5,8 @@ services:
     build: build/dev
     image: are-you-alive-dev
     volumes:
-      - .:/go/src/github.com/planetscale/are-you-alive
-    working_dir: /go/src/github.com/planetscale/are-you-alive
+      - .:/go/src/vitess.io/vitess/examples/are-you-alive
+    working_dir: /go/src/vitess.io/vitess/examples/are-you-alive
     environment:
       MYSQL_CONN_STRING: root:mysql@tcp(mysql)/testfixture
     depends_on:

examples/are-you-alive/go.mod

@@ -0,0 +1,11 @@
+module vitess.io/vitess/examples/are-you-alive
+
+go 1.12
+
+require (
+	github.com/go-sql-driver/mysql v1.5.0
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.1 // indirect
+	github.com/prometheus/client_golang v1.4.1
+	github.com/sirupsen/logrus v1.4.2
+)

examples/are-you-alive/go.sum

@@ -0,0 +1,92 @@
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