chore: Externalize version & build information (#104)

* chore: Externalize version information

* Use full Git commit information

* Introduce short and long version information

* Typos

* More typos

2 files changed, 34 insertions, 15 deletions

diff --git a/pkg/version/version.go b/pkg/version/version.go
index 140b016..d9c405a 100644
--- a/pkg/version/version.go
+++ b/pkg/version/version.go
@@ -1,21 +1,20 @@
 package version
 
-import "fmt"
-
-const (
-	majorVersion     = "0"
-	minorVersion     = "7"
-	patchVersion     = "0"
-	preReleaseString = "master"
+import (
+	"fmt"
+	"runtime"
+	"time"
 )
 
-const binaryName = "argocd-image-updater"
+var (
+	version    = "9.9.99"
+	buildDate  = time.Now().UTC().Format(time.RFC3339)
+	gitCommit  = "unknown"
+	binaryName = "argocd-image-updater"
+)
 
 func Version() string {
-	version := fmt.Sprintf("v%s.%s.%s", majorVersion, minorVersion, patchVersion)
-	if preReleaseString != "" {
-		version += fmt.Sprintf("-%s", preReleaseString)
-	}
+	version := fmt.Sprintf("v%s+%s", version, gitCommit[0:7])
 	return version
 }
 
@@ -24,5 +23,25 @@ func BinaryName() string {
 }
 
 func Useragent() string {
-	return fmt.Sprintf("%s %s", BinaryName(), Version())
+	return fmt.Sprintf("%s: %s", BinaryName(), Version())
+}
+
+func GitCommit() string {
+	return gitCommit
+}
+
+func BuildDate() string {
+	return buildDate
+}
+
+func GoVersion() string {
+	return runtime.Version()
+}
+
+func GoPlatform() string {
+	return runtime.GOOS + "/" + runtime.GOARCH
+}
+
+func GoCompiler() string {
+	return runtime.Compiler
 }
diff --git a/pkg/version/version_test.go b/pkg/version/version_test.go
index a68c88f..638daa4 100644
--- a/pkg/version/version_test.go
+++ b/pkg/version/version_test.go
@@ -12,9 +12,9 @@ func Test_BinaryName(t *testing.T) {
 }
 
 func Test_Version(t *testing.T) {
-	assert.Regexp(t, `^v[0-9]\.[0-9]\.[0-9](-[a-z]+)*$`, Version())
+	assert.Regexp(t, `^v[0-9]+\.[0-9]+\.[0-9]+(\-[a-z]+)*(\+[a-z0-9]+)*$`, Version())
 }
 
 func Test_Useragent(t *testing.T) {
-	assert.Regexp(t, `^[a-z\-]+\sv[0-9]\.[0-9]\.[0-9](-[a-z]+)*$`, Useragent())
+	assert.Regexp(t, `^[a-z\-]+:\sv[0-9]+\.[0-9]+\.[0-9]+(-[a-z]+)*(\+[a-z0-9]+)*$`, Useragent())
 }