From 0f0a14bf6cd927aa5dfc3e68961f6a768fab672e Mon Sep 17 00:00:00 2001
From: Jaewon Hur <hurjaewon@snu.ac.kr>
Date: Thu, 12 Feb 2026 12:34:02 -0800
Subject: [PATCH 1/3] Check unused imports

---
 Makefile                        |  4 +--
 scripts/check-unused-imports.sh | 55 +++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+), 2 deletions(-)
 create mode 100755 scripts/check-unused-imports.sh

diff --git a/Makefile b/Makefile
index 31816886c..a0f673564 100644
--- a/Makefile
+++ b/Makefile
@@ -55,13 +55,13 @@ all: init-block
 build:
 	@echo Building container binaries...
 	@$(SWIFT) --version
-	@$(SWIFT) build -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION)
+	@$(SWIFT) build -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) $(BUILD_OPTIONS)
 
 .PHONY: cli
 cli:
 	@echo Building container CLI...
 	@$(SWIFT) --version
-	@$(SWIFT) build -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --product container
+	@$(SWIFT) build -c $(BUILD_CONFIGURATION) $(SWIFT_CONFIGURATION) --product container $(BUILD_OPTIONS)
 	@echo Installing container CLI to bin/...
 	@mkdir -p bin
 	@install "$(BUILD_BIN_DIR)/container" "bin/container"
diff --git a/scripts/check-unused-imports.sh b/scripts/check-unused-imports.sh
new file mode 100755
index 000000000..09e65127a
--- /dev/null
+++ b/scripts/check-unused-imports.sh
@@ -0,0 +1,55 @@
+#!/bin/bash -e
+# Copyright © 2026 Apple Inc. and the container project authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+echo "Checking existence of swiftlint..."
+
+if ! command -v swiftlint >/dev/null; then
+    echo "swiftlint not found in PATH"
+    echo "please install swiftlint. You can run brew install swiftlint"
+    exit 1
+fi
+
+PROJECT_ROOT="$(realpath "${BASH_SOURCE[0]}/../../")"
+BUILD_LOG=${PROJECT_ROOT}/.build/build.log
+LINT_LOG=${PROJECT_ROOT}/.build/swiftlint.log
+
+echo 'Building `container` with verbose flag'
+if [ ! -f ${BUILD_LOG} ];
+then
+    make -C ${PROJECT_ROOT} clean
+    make -C ${PROJECT_ROOT} BUILD_OPTIONS="-v &>${BUILD_LOG}"
+fi
+
+# Get changed Swift files from git diff main
+CHANGED_SWIFT_FILES=$(git diff main --name-only | grep '\.swift$' || true)
+
+if [ -z "$CHANGED_SWIFT_FILES" ]; then
+    echo "No Swift files changed, skipping swiftlint analysis"
+    touch ${LINT_LOG}
+else
+    echo "Analyzing changed Swift files:"
+    # Convert to absolute paths and pass to swiftlint
+    ABSOLUTE_PATHS=()
+    while IFS= read -r file; do
+        if [ -n "$file" ]; then
+            echo "  - $file"
+            ABSOLUTE_PATHS+=("${PROJECT_ROOT}/${file}")
+        fi
+    done <<< "$CHANGED_SWIFT_FILES"
+    swiftlint analyze --compiler-log-path ${BUILD_LOG} "${ABSOLUTE_PATHS[@]}" 2>/dev/null > ${LINT_LOG}
+
+    echo -e "\nUnused imports:\n"
+    cat ${LINT_LOG} | grep "Unused Import"
+fi

From 2146e11751325e6e42b16aed029a9a9cf9abec02 Mon Sep 17 00:00:00 2001
From: Jaewon Hur <hurjaewon@snu.ac.kr>
Date: Thu, 12 Feb 2026 13:19:10 -0800
Subject: [PATCH 2/3] Update getting PROJECT_ROOT

---
 scripts/check-unused-imports.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/check-unused-imports.sh b/scripts/check-unused-imports.sh
index 09e65127a..c51c4c9bf 100755
--- a/scripts/check-unused-imports.sh
+++ b/scripts/check-unused-imports.sh
@@ -21,7 +21,7 @@ if ! command -v swiftlint >/dev/null; then
     exit 1
 fi
 
-PROJECT_ROOT="$(realpath "${BASH_SOURCE[0]}/../../")"
+PROJECT_ROOT="$(git rev-parse --show-toplevel)"
 BUILD_LOG=${PROJECT_ROOT}/.build/build.log
 LINT_LOG=${PROJECT_ROOT}/.build/swiftlint.log
 

From 12fe078b77a22a77108008e7d643065d3d0883a8 Mon Sep 17 00:00:00 2001
From: Jaewon Hur <hurjaewon@snu.ac.kr>
Date: Thu, 19 Feb 2026 13:45:29 -0800
Subject: [PATCH 3/3] Add .swiftlint.yml

---
 .swiftlint.yml                  | 2 ++
 scripts/check-unused-imports.sh | 7 ++-----
 2 files changed, 4 insertions(+), 5 deletions(-)
 create mode 100644 .swiftlint.yml

diff --git a/.swiftlint.yml b/.swiftlint.yml
new file mode 100644
index 000000000..c57d1d2b0
--- /dev/null
+++ b/.swiftlint.yml
@@ -0,0 +1,2 @@
+analyzer_rules:
+  - unused_import
diff --git a/scripts/check-unused-imports.sh b/scripts/check-unused-imports.sh
index c51c4c9bf..e7ccc38cc 100755
--- a/scripts/check-unused-imports.sh
+++ b/scripts/check-unused-imports.sh
@@ -26,11 +26,8 @@ BUILD_LOG=${PROJECT_ROOT}/.build/build.log
 LINT_LOG=${PROJECT_ROOT}/.build/swiftlint.log
 
 echo 'Building `container` with verbose flag'
-if [ ! -f ${BUILD_LOG} ];
-then
-    make -C ${PROJECT_ROOT} clean
-    make -C ${PROJECT_ROOT} BUILD_OPTIONS="-v &>${BUILD_LOG}"
-fi
+make -C ${PROJECT_ROOT} clean
+make -C ${PROJECT_ROOT} BUILD_OPTIONS="-v &>${BUILD_LOG}"
 
 # Get changed Swift files from git diff main
 CHANGED_SWIFT_FILES=$(git diff main --name-only | grep '\.swift$' || true)