fix footer source link for untagged head commits

Author: Bios-Marcel

internal/frontend/create.go

@@ -29,6 +29,7 @@ type SSRHandler struct {
 func NewHandler(cfg *config.Config) (*SSRHandler, error) {
 	basePageConfig := &BasePageConfig{
 		Version: version.Version,
+		Commit:  version.Commit,
 		RootURL: cfg.RootURL,
 	}
 	if cfg.RootPath != "" {

internal/frontend/http.go

@@ -30,8 +30,11 @@ func init() {
 // BasePageConfig is data that all pages require to function correctly, no matter
 // whether error page or lobby page.
 type BasePageConfig struct {
-	// Version is the source code version of this build.
+	// Version is the tagged source code version of this build. Can be empty for dev
+	// builds. Untagged commits will be of format `tag-N-gSHA`.
 	Version string `json:"version"`
+	// Commit that was deployed, if we didn't deploy a concrete tag.
+	Commit string `json:"commit"`
 	// RootPath is the path directly after the domain and before the
 	// scribble.rs paths. For example if you host scribblers on painting.com
 	// but already host a different website, then your API paths might have to

internal/frontend/templates/footer.html

@@ -1,6 +1,9 @@
 {{define "footer"}}
 {{if eq .Version "dev"}}
 <a class="footer-item" href="https://github.com/scribble-rs/scribble.rs" target="_blank">{{.Version}}</a>
+{{else if ne .Commit ""}}
+<a class="footer-item" href="https://github.com/scribble-rs/scribble.rs/commit/{{.Commit}}"
+    target="_blank">{{.Version}}</a>
 {{else}}
 <a class="footer-item" href="https://github.com/scribble-rs/scribble.rs/releases/tag/{{.Version}}"
     target="_blank">{{.Version}}</a>

internal/version/version.go

@@ -2,5 +2,29 @@
 // scearios, it will default to "dev".
 package version
 
+import (
+	"fmt"
+	"regexp"
+)
+
 // Version of the application.
-var Version = "dev"
+var (
+	Version = "dev"
+	Commit  = ""
+)
+
+func init() {
+	// We expect to get a "dirt git tag" when deploying a test version that
+	// we did not yet finalize. We'll take it apart to allow the frontend
+	// to put the correct link to the repository.
+
+	if Version != "dev" {
+		// version-commit_count_after_version-hash
+		hashRegex := regexp.MustCompile("v.+?(?:-\\d+?-g(.+?)(?:$|-))")
+		match := hashRegex.FindStringSubmatch(Version)
+		fmt.Println(match, len(match))
+		if len(match) == 2 {
+			Commit = match[1]
+		}
+	}
+}