chore: Add Release Audit Tool check to linter

.gitignore

@@ -15,5 +15,19 @@
 # specific language governing permissions and limitations
 # under the License.
 
-/.build/
+*.xcodeproj
+.DS_Store
+.build/
+.netrc
+.swiftpm/
+DerivedData/
+Packages/
+xcuserdata/
+
+# Docker
 /.docker/
+
+# Release Audit Tool
+/dev/release/apache-rat-*.jar
+/dev/release/filtered_rat.txt
+/dev/release/rat.xml

.pre-commit-config.yaml

@@ -16,6 +16,20 @@
 # under the License.
 
 repos:
+  - repo: local
+    hooks:
+      - id: rat
+        name: Release Audit Tool
+        language: system
+        entry: |
+          bash -c " \
+            git archive HEAD \
+              --prefix=apache-arrow-swift/ \
+              --output=apache-arrow-swift.tar.gz && \
+              dev/release/run_rat.sh apache-arrow-swift.tar.gz && \
+              rm -f apache-arrow-swift.tar.gz"
+        always_run: true
+        pass_filenames: false
   - repo: https://github.com/realm/SwiftLint
     rev: 0.59.1
     hooks:

dev/release/check_rat_report.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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
+#
+#   http://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.
+
+import fnmatch
+import re
+import sys
+import xml.etree.ElementTree as ET
+
+if len(sys.argv) != 3:
+    sys.stderr.write("Usage: %s exclude_globs.lst rat_report.xml\n" %
+                     sys.argv[0])
+    sys.exit(1)
+
+exclude_globs_filename = sys.argv[1]
+xml_filename = sys.argv[2]
+
+globs = [line.strip() for line in open(exclude_globs_filename, "r")]
+
+tree = ET.parse(xml_filename)
+root = tree.getroot()
+resources = root.findall('resource')
+
+all_ok = True
+for r in resources:
+    approvals = r.findall('license-approval')
+    if not approvals or approvals[0].attrib['name'] == 'true':
+        continue
+    clean_name = re.sub('^[^/]+/', '', r.attrib['name'])
+    excluded = False
+    for g in globs:
+        if fnmatch.fnmatch(clean_name, g):
+            excluded = True
+            break
+    if not excluded:
+        sys.stdout.write("NOT APPROVED: %s (%s): %s\n" % (
+            clean_name, r.attrib['name'], approvals[0].attrib['name']))
+        all_ok = False
+
+if not all_ok:
+    sys.exit(1)
+
+print('OK')
+sys.exit(0)

dev/release/rat_exclude_files.txt

@@ -0,0 +1,22 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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
+#
+#   http://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.
+
+*/*/go.sum
+*/Package.resolved
+*/go.sum
+.github/pull_request_template.md
+Package.resolved

dev/release/run_rat.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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
+#
+#   http://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.
+
+set -eu
+
+RELEASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+RAT_VERSION=0.16.1
+
+RAT_JAR="${RELEASE_DIR}/apache-rat-${RAT_VERSION}.jar"
+if [ ! -f "${RAT_JAR}" ]; then
+  curl \
+    --fail \
+    --output "${RAT_JAR}" \
+    --show-error \
+    --silent \
+    https://repo1.maven.org/maven2/org/apache/rat/apache-rat/${RAT_VERSION}/apache-rat-${RAT_VERSION}.jar
+fi
+
+RAT_XML="${RELEASE_DIR}/rat.xml"
+java \
+  -jar "${RAT_JAR}" \
+  --out "${RAT_XML}" \
+  --xml \
+  "$1"
+FILTERED_RAT_TXT="${RELEASE_DIR}/filtered_rat.txt"
+if ${PYTHON:-python3} \
+  "${RELEASE_DIR}/check_rat_report.py" \
+  "${RELEASE_DIR}/rat_exclude_files.txt" \
+  "${RAT_XML}" > \
+  "${FILTERED_RAT_TXT}"; then
+  echo "No unapproved licenses"
+else
+  cat "${FILTERED_RAT_TXT}"
+  N_UNAPPROVED=$(grep -c "NOT APPROVED" "${FILTERED_RAT_TXT}")
+  echo "${N_UNAPPROVED} unapproved licenses. Check Rat report: ${RAT_XML}"
+  exit 1
+fi