testing travis

docker/Dockerfile.testing

@@ -0,0 +1,35 @@
+FROM golang:1.10-stretch
+
+RUN apt-get update && apt-get -y install cron python3 sudo procps
+
+### Test and build ###
+# copy source code
+COPY main.go /go/src/github.com/dominicbreuker/pspy/main.go
+COPY cmd /go/src/github.com/dominicbreuker/pspy/cmd
+COPY internal /go/src/github.com/dominicbreuker/pspy/internal
+COPY vendor /go/src/github.com/dominicbreuker/pspy/vendor
+
+# run tests
+WORKDIR /go/src/github.com/dominicbreuker/pspy
+RUN go test ./...
+# build executable
+RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -ldflags '-extldflags "-static"' -o bin/pspy main.go
+
+### Prepare integration test ###
+# install root cronjob
+COPY docker/var/spool/cron/crontabs /var/spool/cron/crontabs
+RUN chmod 600 /var/spool/cron/crontabs/root
+COPY docker/root/scripts /root/scripts
+
+# set up unpriviledged user
+# allows passwordless sudo to start cron as root on startup
+RUN useradd -ms /bin/bash myuser && \
+    adduser myuser sudo && \
+    echo 'myuser ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
+USER myuser
+
+
+# drop into bash shell
+COPY docker/entrypoint-testing.sh /entrypoint.sh
+RUN sudo chmod +x /entrypoint.sh
+CMD ["/entrypoint.sh"]