ci: push image to vsilent/stackdog:latest with git hash baked in

- docker.yml now pushes to vsilent/stackdog:latest (and :<sha> tag)
- STACKDOG_GIT_HASH injected via env during cross build so the
  hash survives inside the cross Docker container
- build.rs reads STACKDOG_GIT_HASH env var first, falls back to
  running git locally

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vsilent

.github/workflows/docker.yml

@@ -43,6 +43,7 @@ jobs:
       - name: Build static release
         env:
           CARGO_TARGET_DIR: target-cross
+          STACKDOG_GIT_HASH: ${{ github.sha }}
         run: cross build --release --target x86_64-unknown-linux-musl
 
       - name: Build frontend
@@ -98,4 +99,6 @@ jobs:
         with:
           context: .
           push: true
-          tags: trydirect/stackdog:latest
+          tags: |
+            vsilent/stackdog:latest
+            vsilent/stackdog:${{ github.sha }}

build.rs

@@ -1,14 +1,18 @@
 use std::process::Command;
 
 fn main() {
-    let hash = Command::new("git")
-        .args(["rev-parse", "--short", "HEAD"])
-        .output()
-        .ok()
-        .filter(|o| o.status.success())
-        .and_then(|o| String::from_utf8(o.stdout).ok())
-        .map(|s| s.trim().to_string())
-        .unwrap_or_else(|| "unknown".to_string());
+    // Allow CI (or any build environment) to inject the hash directly.
+    // Falls back to running `git rev-parse --short HEAD` locally.
+    let hash = std::env::var("STACKDOG_GIT_HASH").unwrap_or_else(|_| {
+        Command::new("git")
+            .args(["rev-parse", "--short", "HEAD"])
+            .output()
+            .ok()
+            .filter(|o| o.status.success())
+            .and_then(|o| String::from_utf8(o.stdout).ok())
+            .map(|s| s.trim().to_string())
+            .unwrap_or_else(|| "unknown".to_string())
+    });
 
     println!("cargo:rustc-env=STACKDOG_GIT_HASH={hash}");
     println!("cargo:rerun-if-changed=.git/HEAD");