fix(configs): sync devcontainer.json RUST_VERSION in

sync-rustc-version.sh

Author: jiengup

.devcontainer/devcontainer.json

@@ -3,11 +3,11 @@
   "hostRequirements": {
     "cpus": 4,
     "memory": "16gb",
-    "storage": "32gb"
+    "storage": "64gb"
   },
   "build": {
     "dockerfile": "Dockerfile",
-    "context": "..",
+    "context": ".."
   },
   "features": {
     "ghcr.io/devcontainers/features/docker-outside-of-docker:1": {

scripts/ci/sync-rustc-version.sh

@@ -182,15 +182,61 @@ for dockerfile in $DOCKERFILES; do
     fi
 done
 
+# ── devcontainer.json ──────────────────────────────────────────────
+#
+# devcontainer.json's `build.args` key is passed by VS Code as
+# `docker build --build-arg` and overrides the default value of
+# `ARG RUST_VERSION=1.96` in `.devcontainer/Dockerfile`.  When the key
+# is absent the Dockerfile's ARG default wins and no sync is needed.
+# When present it must match rust-toolchain.toml, otherwise the
+# devcontainer image can silently drift from the pinned toolchain.
+DEVCONTAINER_JSON=".devcontainer/devcontainer.json"
+
+check_devcontainer_json() {
+    if [ ! -f "$DEVCONTAINER_JSON" ]; then
+        return 0
+    fi
+
+    local current_version
+    current_version=$(jq -r '(.build.args.RUST_VERSION // .build.args.rust_version // "")' "$DEVCONTAINER_JSON" 2>/dev/null || true)
+    if [ -z "$current_version" ] || [ "$current_version" = "null" ]; then
+        return 0
+    fi
+
+    TOTAL_FILES=$((TOTAL_FILES + 1))
+
+    if [ "$MODE" = "check" ]; then
+        if [ "$current_version" != "$RUST_VERSION_SHORT" ]; then
+            MISALIGNED_FILES+=("$DEVCONTAINER_JSON")
+            echo -e "${RED}✗${NC} $DEVCONTAINER_JSON: build.args.RUST_VERSION ${RED}$current_version${NC} (expected: ${GREEN}$RUST_VERSION_SHORT${NC})"
+        else
+            echo -e "${GREEN}✓${NC} $DEVCONTAINER_JSON: build.args.RUST_VERSION ${GREEN}$RUST_VERSION_SHORT${NC}"
+        fi
+    elif [ "$MODE" = "fix" ]; then
+        if [ "$current_version" != "$RUST_VERSION_SHORT" ]; then
+            local tmp_file
+            tmp_file=$(mktemp)
+            jq --arg v "$RUST_VERSION_SHORT" '.build.args.RUST_VERSION = $v' "$DEVCONTAINER_JSON" > "$tmp_file"
+            mv "$tmp_file" "$DEVCONTAINER_JSON"
+            FIXED_FILES=$((FIXED_FILES + 1))
+            echo -e "${GREEN}Fixed${NC} $DEVCONTAINER_JSON: build.args.RUST_VERSION ${RED}$current_version${NC} -> ${GREEN}$RUST_VERSION_SHORT${NC}"
+        else
+            echo -e "${GREEN}✓${NC} $DEVCONTAINER_JSON: build.args.RUST_VERSION already correct (${GREEN}$RUST_VERSION_SHORT${NC})"
+        fi
+    fi
+}
+
+check_devcontainer_json
+
 echo ""
 echo "────────────────────────────────────────────────"
 
 if [ "$MODE" = "check" ]; then
     if [ ${#MISALIGNED_FILES[@]} -eq 0 ]; then
-        echo -e "${GREEN}✓ All $TOTAL_FILES Dockerfiles are aligned with Rust version $RUST_VERSION_SHORT${NC}"
+        echo -e "${GREEN}✓ All $TOTAL_FILES files are aligned with Rust version $RUST_VERSION_SHORT${NC}"
         exit 0
     else
-        echo -e "${RED}✗ Found ${#MISALIGNED_FILES[@]} misaligned Dockerfile(s) out of $TOTAL_FILES:${NC}"
+        echo -e "${RED}✗ Found ${#MISALIGNED_FILES[@]} misaligned file(s) out of $TOTAL_FILES:${NC}"
         for file in "${MISALIGNED_FILES[@]}"; do
             echo -e "  ${RED}• $file${NC}"
         done
@@ -200,9 +246,9 @@ if [ "$MODE" = "check" ]; then
     fi
 elif [ "$MODE" = "fix" ]; then
     if [ $FIXED_FILES -eq 0 ]; then
-        echo -e "${GREEN}✓ All $TOTAL_FILES Dockerfiles were already aligned with Rust version $RUST_VERSION_SHORT${NC}"
+        echo -e "${GREEN}✓ All $TOTAL_FILES files were already aligned with Rust version $RUST_VERSION_SHORT${NC}"
     else
-        echo -e "${GREEN}✓ Fixed $FIXED_FILES out of $TOTAL_FILES Dockerfiles to use Rust version $RUST_VERSION_SHORT${NC}"
+        echo -e "${GREEN}✓ Fixed $FIXED_FILES out of $TOTAL_FILES files to use Rust version $RUST_VERSION_SHORT${NC}"
     fi
     exit 0
 fi