From 6541f19b67a2129669fb1b505d976cca44dcb714 Mon Sep 17 00:00:00 2001
From: Dario Tranchitella <dario@tranchitella.eu>
Date: Tue, 17 Nov 2020 19:20:31 +0100
Subject: [PATCH] Automating version pick-up according to current git version
 and minor Kustomize hotfixes (#135)

---
 .github/workflows/main.yml        |  4 +++-
 Dockerfile                        | 18 ++++++++++++++----
 Makefile                          |  4 ++--
 config/manager/kustomization.yaml |  4 +---
 config/manager/manager.yaml       |  2 +-
 main.go                           |  5 +++--
 version/version.go => version.go  | 17 +++++++++++++++--
 7 files changed, 39 insertions(+), 15 deletions(-)
 rename version/version.go => version.go (74%)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 52e3f419..9638f111 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -33,7 +33,9 @@ jobs:
         k8s-version: ['v1.16.15', 'v1.17.11', 'v1.18.8', 'v1.19.1']
     runs-on: ubuntu-18.04
     steps:
-    - uses: actions/checkout@master
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
     - name: Cache Go modules and Docker images
       uses: actions/cache@v1
       env:
diff --git a/Dockerfile b/Dockerfile
index c41ab059..1e00430f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,15 +11,25 @@ RUN go mod download
 
 # Copy the go source
 COPY main.go main.go
+COPY version.go version.go
 COPY api/ api/
 COPY controllers/ controllers/
 COPY pkg/ pkg/
-COPY version/ version/
-
-ARG VERSION
+COPY .git .git
 
 # Build
-RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build -a -ldflags "-X github.com/clastix/capsule/version.Version=${VERSION}" -o manager main.go
+RUN git config --get remote.origin.url > /tmp/GIT_REPO && \
+    git rev-parse --short HEAD > /tmp/GIT_HEAD_COMMIT && \
+    git describe --abbrev=0 --tags > /tmp/GIT_LAST_TAG && \
+    git rev-parse --short $(cat /tmp/GIT_LAST_TAG) > /tmp/GIT_TAG_COMMIT && \
+    git diff $(cat /tmp/GIT_HEAD_COMMIT) $(cat /tmp/GIT_TAG_COMMIT) --quiet > /tmp/GIT_MODIFIED1 || echo '.dev' > /tmp/GIT_MODIFIED1 && \
+    git diff --quiet > /tmp/GIT_MODIFIED2 || echo '.dirty' > /tmp/GIT_MODIFIED2 && \
+    cat /tmp/GIT_MODIFIED1 /tmp/GIT_MODIFIED2 | tr -d '\n' > /tmp/GIT_MODIFIED && \
+    date '+%Y-%m-%dT%H:%M:%S' > /tmp/BUILD_DATE &&\
+    CGO_ENABLED=0 GOOS=linux GOARCH=amd64 GO111MODULE=on go build \
+        -gcflags "-N -l" \
+        -ldflags "-X main.GitRepo=$(cat /tmp/GIT_REPO) -X main.GitTag=$(cat /tmp/GIT_LAST_TAG) -X main.GitCommit=$(cat /tmp/GIT_HEAD_COMMIT) -X main.GitDirty=$(cat /tmp/GIT_MODIFIED) -X main.BuildTime=$(cat /tmp/BUILD_DATE)" \
+        -o manager
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
diff --git a/Makefile b/Makefile
index 1b4d351f..0d276c36 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 # Current Operator version
-VERSION ?= 0.0.1
+VERSION ?= $$(git describe --abbrev=0 --tags)
 
 # Default bundle image tag
 BUNDLE_IMG ?= quay.io/clastix/capsule:$(VERSION)-bundle
@@ -75,7 +75,7 @@ generate: controller-gen
 
 # Build the docker image
 docker-build: test
-	docker build . --build-arg=VERSION=${VERSION} -t ${IMG}
+	docker build . -t ${IMG}
 
 # Push the docker image
 docker-push:
diff --git a/config/manager/kustomization.yaml b/config/manager/kustomization.yaml
index a2407d5e..46147119 100644
--- a/config/manager/kustomization.yaml
+++ b/config/manager/kustomization.yaml
@@ -5,6 +5,4 @@ kind: Kustomization
 images:
 - name: controller
   newName: quay.io/clastix/capsule
-  newTag: 0.0.1
-- name: quay.io/clastix/capsule
-  newTag: 0.0.1
+  newTag: v0.0.2
diff --git a/config/manager/manager.yaml b/config/manager/manager.yaml
index bfefd7c4..0ff6002e 100644
--- a/config/manager/manager.yaml
+++ b/config/manager/manager.yaml
@@ -34,7 +34,7 @@ spec:
           valueFrom:
             fieldRef:
               fieldPath: metadata.namespace
-        image: quay.io/clastix/capsule:latest
+        image: controller
         imagePullPolicy: IfNotPresent
         name: manager
         resources:
diff --git a/main.go b/main.go
index e47304be..cb2ab9c3 100644
--- a/main.go
+++ b/main.go
@@ -47,7 +47,6 @@ import (
 	"github.com/clastix/capsule/pkg/webhook/tenant"
 	"github.com/clastix/capsule/pkg/webhook/tenant_prefix"
 	"github.com/clastix/capsule/pkg/webhook/utils"
-	"github.com/clastix/capsule/version"
 	// +kubebuilder:scaffold:imports
 )
 
@@ -64,7 +63,9 @@ func init() {
 }
 
 func printVersion() {
-	setupLog.Info(fmt.Sprintf("Operator Version: %s", version.Version))
+	setupLog.Info(fmt.Sprintf("Capsule Version %s %s%s", GitTag, GitCommit, GitDirty))
+	setupLog.Info(fmt.Sprintf("Build from: %s", GitRepo))
+	setupLog.Info(fmt.Sprintf("Build date: %s", BuildTime))
 	setupLog.Info(fmt.Sprintf("Go Version: %s", goRuntime.Version()))
 	setupLog.Info(fmt.Sprintf("Go OS/Arch: %s/%s", goRuntime.GOOS, goRuntime.GOARCH))
 }
diff --git a/version/version.go b/version.go
similarity index 74%
rename from version/version.go
rename to version.go
index e9e0f2a4..e23c8c02 100644
--- a/version/version.go
+++ b/version.go
@@ -14,6 +14,19 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package version
+package main
 
-var Version = "dev"
+//GitRepo ...
+var GitRepo = ""
+
+//GitTag ...
+var GitTag = "dev"
+
+//GitCommit ...
+var GitCommit = ""
+
+//GitDirty ...
+var GitDirty = "dirty"
+
+//BuildTime ...
+var BuildTime = ""