Add GitSHA variable

.github/workflows/docker-image.yml

@@ -17,7 +17,7 @@ jobs:
         echo "SLUG=ghcr.io/cwpearson/ytdlp-site" >> $GITHUB_ENV
         echo "DATE=$(date +"%Y%m%d_%H%M")" >> $GITHUB_ENV
     - name: Build the Docker image
-      run: docker build . --file Dockerfile --tag "$SLUG:$DATE" --tag "$SLUG:latest"
+      run: docker build . --file Dockerfile --build-arg GIT_SHA=$(git rev-parse HEAD) --tag "$SLUG:$DATE" --tag "$SLUG:latest"
     - name: Publish to GHCR
       run: |
         echo '${{secrets.GHCR_TOKEN}}' | docker login ghcr.io -u cwpearson --password-stdin

Dockerfile

@@ -1,4 +1,6 @@
 FROM golang:1.23.0-bookworm as builder
+ARG GIT_SHA="<not provided>"
+
 
 RUN apt-get update && apt-get install -y --no-install-recommends --no-install-suggests wget
 RUN wget https://github.com/yt-dlp/yt-dlp/releases/latest/download/yt-dlp_linux -O /usr/local/bin/yt-dlp \
@@ -8,7 +10,7 @@ ADD *.go /src/.
 ADD go.mod /src
 
 RUN cd /src && go mod tidy
-RUN cd /src && go build -o server *.go
+RUN cd /src && go build -ldflags "-X main.GitSHA=${GIT_SHA}" -o server *.go
 
 FROM debian:bookworm-slim
 

config.go

@@ -39,3 +39,15 @@ func getSessionAuthKey() ([]byte, error) {
 	}
 	return []byte{}, errors.New(fmt.Sprintf("please set %s", key))
 }
+
+var GitSHA string
+
+func getGitSHA() string {
+
+	if GitSHA == "" {
+		return "<not provided>"
+	} else {
+		return GitSHA
+	}
+
+}

main.go

@@ -37,6 +37,8 @@ func ensureAdminAccount(db *gorm.DB) error {
 
 func main() {
 
+	fmt.Printf("git SHA: %s\n", getGitSHA())
+
 	// Create config database
 	err := os.MkdirAll(getConfigDir(), 0700)
 	if err != nil {