Building Go app with "vendor" directory on Jenkins with Docker - docker

Question

I'm trying to set up a Jenkins Pipeline to build and deploy my first Go project using a Jenkinsfile and docker.image().inside . I can't figure out how to get go to pick up the dependencies in the vendor/ directory.
When I run the build, I get a bunch of errors:
+ goapp test ./...
src/dao/demo_dao.go:8:2: cannot find package "github.com/dgrijalva/jwt-go" in any of:
/usr/lib/go_appengine/goroot/src/github.com/dgrijalva/jwt-go (from $GOROOT)
/usr/lib/go_appengine/gopath/src/github.com/dgrijalva/jwt-go (from $GOPATH)
/workspace/src/github.com/dgrijalva/jwt-go
...why isn't it picking up the Vendor directory?
When I throw in some logging, it seems that after running sh "cd /workspace/src/bitbucket.org/nalbion/go-demo" the next sh command is still in the original ${WORKSPACE} directory. I really like the idea of the Jenkins file, but I can't find any decent documentation for it.
(Edit - there is decent documentation here but dir("/workspace/src/bitbucket.org/nalbion/go-demo") {} doesn't seem to work within docker.image().inside)
My Docker file resembles:
FROM golang:1.6.2
# Google's App Engine Go SDK
RUN wget https://storage.googleapis.com/appengine-sdks/featured/go_appengine_sdk_linux_amd64-1.9.40.zip -q -O go_appengine_sdk.zip && \
unzip -q go_appengine_sdk.zip -d /usr/lib/ && \
rm go_appengine_sdk.zip
ENV PATH /usr/lib/go_appengine:/go/bin:/usr/local/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
ENV GOPATH /usr/lib/go_appengine/gopath
# Add Jenkins user
RUN groupadd -g 132 jenkins && useradd -d "/var/jenkins_home" -u 122 -g 132 -m -s /bin/bash jenkins
And my Jenkinsfile:
node('docker') {
currentBuild.result = "SUCCESS"
try {
stage 'Checkout'
checkout scm
stage 'Build and Test'
env.WORKSPACE = pwd()
docker.image('nalbion/go-web-build:latest').inside(
"-v ${env.WORKSPACE}:/workspace/src/bitbucket.org/nalbion/go-demo " +
"-e GOPATH=/usr/lib/go_appengine/gopath:/workspace") {
// Debugging
sh 'echo GOPATH: $GOPATH'
sh "ls -al /workspace/src/bitbucket.org/nalbion/go-demo"
sh "cd /workspace/src/bitbucket.org/nalbion/go-demo"
sh "pwd"
sh "go vet ./src/..."
sh "goapp test ./..."
}
stage 'Deploy to DEV'
docker.image('nalbion/go-web-build').inside {
sh "goapp deploy --application go-demo --version v${v} app.yaml"
}
timeout(time:5, unit:'DAYS') {
input message:'Approve deployment?', submitter: 'qa'
}
stage 'Deploy to PROD'
docker.image('nalbion/go-web-build').inside {
sh "goapp deploy --application go-demo --version v${v} app.yaml"
}
} catch (err) {
currentBuild.result = "FAILURE"
// send notifications
throw err
}
}

Answer 1

I managed to get it working by including the cd in the same sh statement:
docker.image('nalbion/go-web-build:latest')
.inside("-v ${env.WORKSPACE}:/workspace/src/bitbucket.org/nalbion/go-demo " +
"-e GOPATH=/usr/lib/go_appengine/gopath:/workspace") {
sh """
cd /workspace/src/bitbucket.org/nalbion/go-demo
go vet ./src/...
goapp test ./...
"""
}