fix(ci, http): commit_sha and commit_date in docker builds

chore(ci): cache dependencies in Docker build

.github/workflows/publish_to_docker.yml

@@ -11,10 +11,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
+      - name: Set COMMIT_DATE env variable
+        run: |
+          echo "COMMIT_DATE=$( git log --pretty=format:'%ad' -n1 --date=short )" >> $GITHUB_ENV
       - name: Publish to Registry
         uses: elgohr/Publish-Docker-Github-Action@master
+        env:
+          COMMIT_SHA: ${{ github.sha }}
         with:
           name: getmeili/meilisearch
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
           tag_names: true
+          buildargs: COMMIT_SHA,COMMIT_DATE

Dockerfile

@@ -25,6 +25,11 @@ RUN     $HOME/.cargo/bin/cargo build --release
 # Cleanup dummy main.rs files
 RUN     find . -path "*/src/main.rs" -delete
 
+ARG     COMMIT_SHA
+ARG     COMMIT_DATE
+ENV     COMMIT_SHA=${COMMIT_SHA}
+ENV     COMMIT_DATE=${COMMIT_DATE}
+
 COPY    . .
 RUN     $HOME/.cargo/bin/cargo build --release
 

meilisearch-http/src/routes/stats.rs

@@ -56,9 +56,18 @@ struct VersionResponse {
 
 #[get("/version", wrap = "Authentication::Private")]
 async fn get_version() -> HttpResponse {
+    let commit_sha = match option_env!("COMMIT_SHA") {
+        Some("") | None => env!("VERGEN_SHA"),
+        Some(commit_sha) => commit_sha
+    };
+    let commit_date = match option_env!("COMMIT_DATE") {
+        Some("") | None => env!("VERGEN_COMMIT_DATE"),
+        Some(commit_date) => commit_date
+    };
+
     HttpResponse::Ok().json(VersionResponse {
-        commit_sha: env!("VERGEN_SHA").to_string(),
-        build_date: env!("VERGEN_BUILD_TIMESTAMP").to_string(),
+        commit_sha: commit_sha.to_string(),
+        build_date: commit_date.to_string(),
         pkg_version: env!("CARGO_PKG_VERSION").to_string(),
     })
 }