From e5ff47e3d0c199b739ef5ab62df9851c11bd7721 Mon Sep 17 00:00:00 2001
From: Thibault VINCENT <root@devcat.org>
Date: Sat, 17 Sep 2022 14:06:17 +0200
Subject: [PATCH] feat: binaries know their build date and commit hash

Will be used for a future metric reporting exporter infos.
---
 Dockerfile                            | 7 +++++--
 cmd/x509-certificate-exporter/main.go | 2 +-
 internal/version.go                   | 4 +++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index 0267444..71b7b58 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,8 +19,11 @@ ENV GOOS=${TARGETOS}
 ENV GOARCH=${TARGETARCH}
 
 ARG VERSION="0.0.0"
-
-RUN go build -tags netgo,osusergo -ldflags "-X \"github.com/enix/x509-certificate-exporter/v3/internal.Version=${VERSION}\"" ./cmd/x509-certificate-exporter
+  -tags netgo,osusergo \
+  -ldflags "-X \"github.com/enix/x509-certificate-exporter/v3/internal.Version=${VERSION}\" \
+            -X \"github.com/enix/x509-certificate-exporter/v3/internal.CommitHash=${VCS_REF}\" \
+            -X \"github.com/enix/x509-certificate-exporter/v3/internal.BuildDateTime=$(date -u -Iseconds)\"" \
+  ./cmd/x509-certificate-exporter
 
 
 ## Production Stage
diff --git a/cmd/x509-certificate-exporter/main.go b/cmd/x509-certificate-exporter/main.go
index 5aed660..58d96e4 100644
--- a/cmd/x509-certificate-exporter/main.go
+++ b/cmd/x509-certificate-exporter/main.go
@@ -109,7 +109,7 @@ func main() {
 		}
 	}
 
-	log.Infof("starting %s version %s", path.Base(os.Args[0]), internal.Version)
+	log.Infof("starting %s version %s (%s) (%s)", path.Base(os.Args[0]), internal.Version, internal.CommitHash, internal.BuildDateTime)
 	rand.Seed(time.Now().UnixNano())
 	exporter.ListenAndServe()
 }
diff --git a/internal/version.go b/internal/version.go
index 949c7f3..0b4df61 100644
--- a/internal/version.go
+++ b/internal/version.go
@@ -1,4 +1,6 @@
 package internal
 
-// Version is the exporter semantic version and is set at link time
+// Version and build informations set at link time
 var Version = "0.0.0"
+var CommitHash = ""
+var BuildDateTime = ""