added swiftlint to BuildAndTest workflow

also added swiftlint precommit hook script with an installation script.

.github/workflows/BuildAndTest.yml

@@ -3,6 +3,15 @@ name: Build and Test
 on: [push, pull_request, workflow_dispatch]
 
 jobs:
+  SwiftLint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - name: GitHub Action for SwiftLint (Only files changed in the PR)
+        uses: norio-nomura/[email protected]
+        env:
+          args: --strict
+          DIFF_BASE: ${{ github.base_ref }}
   macOS:
     runs-on: macos-15
     steps:

.swiftlint.yml

@@ -0,0 +1,18 @@
+included:
+  - "Sources"
+excluded: 
+  - "Sources/Exporters/OpenTelemetryProtocolCommon/proto"
+  - ".build"
+disabled_rules:
+  - nesting
+  - line_length
+  - type_body_length
+  - identifier_name
+  - file_length
+  - force_cast
+  - type_name
+  - large_tuple
+  - function_body_length
+  - function_parameter_count
+  - cyclomatic_complexity
+  - force_try

Scripts/hooks/install-precommit.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
+
+HOOK_DIR=${SCRIPT_DIR}/../../.git/hooks
+
+cp "${SCRIPT_DIR}/precommit-script.sh" "${HOOK_DIR}/precommit"
+
+chmod 0755 "${HOOK_DIR}/precommit"

Scripts/hooks/precommit-script.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+if ! command -v swiftlint 2>&1 >/dev/null
+then
+
+  echo "install swiftlint \(v0.0.57\) for pre-commit linting."
+  exit 0
+fi
+
+if [ "$(swiftlint --version)" != "0.57.1" ]
+then 
+echo "swiftlint installed with incorrect version (`swiftlint --version`). Please use version 0.57.1 for pre-commit linting."
+exit 0
+fi
+OIFS="$IFS"
+IFS=$'\n'
+FILE_LIST=($(git diff --cached --name-only | grep "\.swift$"))
+IFS="$OIFS"
+
+if [ -z "${FILE_LIST}" ]; then
+  exit 0
+fi
+
+swiftlint lint --config .swiftlint.yml --strict "${FILE_LIST[@]}"
+RESULT=$?
+if [ $RESULT -ne 0 ]; then
+  echo -e "Swiftlint failed!\n   Fix issues above or run:\n\tswiftlint lint --fix $(printf "\"%s\" " "${FILE_LIST[@]}")"
+  echo "Skip linting with '--no-verify'."
+  exit 1
+fi
+echo "Swiftlint passed!"
+ exit 1