Fixes #92: show built version and SHA on start-up

[amalkh5]

Description

This commit will solve issue #92 which will show built version and SHA on start-up.

Signed-off-by: Amal Alkhamees amalkms5@gmail.com

Motivation and Context

• [x] I have raised an issue to propose this change (required)

How Has This Been Tested?

1. Build the app

   $ make build-armhf       
   docker build --build-arg http_proxy="" --build-arg https_proxy="" --build-arg go_opts="GOARCH=arm GOARM=6" -t openfaas/queue-worker:latest-armhf .
   Sending build context to Docker daemon  6.094MB
   Step 1/27 : FROM golang:1.13-alpine as golang
   ---> 3369136a43d1
   Step 2/27 : ENV CGO_ENABLED=0
   ---> Using cache
   ---> aa2528b92ad6
   Step 3/27 : ENV GO111MODULE=off
   ---> Using cache
   ---> ee23b83c98b9
   Step 4/27 : WORKDIR /go/src/github.com/openfaas/nats-queue-worker
   ---> Using cache
   ---> 312f1a317d8e
   Step 5/27 : COPY vendor     vendor
   ---> Using cache
   ---> 8a1ba99e13e4
   Step 6/27 : COPY handler    handler
   ---> Using cache
   ---> 4b351989c667
   Step 7/27 : COPY version    version
   ---> Using cache
   ---> e0583954c890
   Step 8/27 : COPY nats       nats
   ---> Using cache
   ---> 156a910dde5f
   Step 9/27 : COPY main.go  .
   ---> 1b74c670c7cc
   Step 10/27 : COPY types.go .
   ---> 31e6914ec333
   Step 11/27 : COPY readconfig.go .
   ---> 02e747d8b9a3
   Step 12/27 : COPY readconfig_test.go .
   ---> 90c5147c19b4
   Step 13/27 : COPY auth.go .
   ---> 4012d8aa241c
   Step 14/27 : COPY .git     .
   ---> f353cd3a75e6
   Step 15/27 : ARG go_opts
   ---> Running in 907f32fdae6a
   Removing intermediate container 907f32fdae6a
   ---> c6ab9981df73
   Step 16/27 : RUN apk add --no-cache git
   ---> Running in 01a6d50fff12
   fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/main/x86_64/APKINDEX.tar.gz
   fetch http://dl-cdn.alpinelinux.org/alpine/v3.11/community/x86_64/APKINDEX.tar.gz
   (1/5) Installing nghttp2-libs (1.40.0-r0)
   (2/5) Installing libcurl (7.67.0-r0)
   (3/5) Installing expat (2.2.9-r1)
   (4/5) Installing pcre2 (10.34-r1)
   (5/5) Installing git (2.24.3-r0)
   Executing busybox-1.31.1-r9.trigger
   OK: 22 MiB in 20 packages
   Removing intermediate container 01a6d50fff12
   ---> 7f7bd6942c1c
   Step 17/27 : RUN  VERSION=$(git describe --all --exact-match `git rev-parse HEAD` | grep tags | sed 's/tags\///')     && GIT_COMMIT=$(git rev-list -1 HEAD)     && env $go_opts CGO_ENABLED=0 go build         --ldflags "-s -w         -X github.com/openfaas/nats-queue-worker/version.GitCommit=${GIT_COMMIT}        -X github.com/openfaas/nats-queue-worker/version.Version=${VERSION}"         -a -installsuffix cgo -o app .     && addgroup -S app     && adduser -S -g app app     && mkdir /scratch-tmp
   ---> Running in 05c7dadb99e5
   Removing intermediate container 05c7dadb99e5
   ---> 6e17f5d37444
   Step 18/27 : FROM scratch
   ---> 
   Step 19/27 : EXPOSE 8080
   ---> Using cache
   ---> dbb3305e45bf
   Step 20/27 : ENV http_proxy      ""
   ---> Using cache
   ---> c0c061819d6e
   Step 21/27 : ENV https_proxy     ""
   ---> Using cache
   ---> c042be336103
   Step 22/27 : USER app
   ---> Using cache
   ---> a313f1ea1e99
   Step 23/27 : COPY --from=golang /etc/passwd /etc/group /etc/
   ---> Using cache
   ---> 25b6a012f427
   Step 24/27 : COPY --from=golang /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
   ---> Using cache
   ---> b4dbd26dec0b
   Step 25/27 : COPY --from=golang --chown=app:app /scratch-tmp /tmp
   ---> Using cache
   ---> a6959de22414
   Step 26/27 : COPY --from=golang /go/src/github.com/openfaas/nats-queue-worker/app    .
   ---> b4ee64cb047c
   Step 27/27 : CMD ["./app"]
   ---> Running in 7ae8bb6be5d3
   Removing intermediate container 7ae8bb6be5d3
   ---> fdb55c62cf8a
   Successfully built fdb55c62cf8a                      
   Successfully tagged openfaas/queue-worker:latest-armhf

2. Run the app

   $ docker run openfaas/queue-worker:latest-armhf
   Starting Queue worker.
   Version: 0.10.1
   Git Commit: 1f4e16e1f7afe1fbd464fcaa8a7dabaa3e4ef0bb
   Connect: nats://nats:4222
   can't connect to nats://nats:4222: nats: no servers available for connection
   panic: can't connect to nats://nats:4222: nats: no servers available for connection
   goroutine 1 [running]:
   log.Panic(0x85beac, 0x1, 0x1)
       /usr/local/go/src/log/log.go:338 +0x84
   main.main()
       /go/src/github.com/openfaas/nats-queue-worker/main.go:219 +0x4d8

   Types of changes

   • [ ] Bug fix (non-breaking change which fixes an issue)
   • [x] New feature (non-breaking change which adds functionality)
   • [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [x] I've read the CONTRIBUTION guide
• [x] I have signed-off my commits with git commit -s
• [ ] I have added tests to cover my changes.
• [ ] All new and existing tests passed.

[amalkh5]

@alexellis fixed.

[alexellis]

Thank you for this PR. 👍