Automate GTFS validator version updates via Dependabot-managed Maven pin

.github/dependabot.yml

@@ -93,3 +93,14 @@ updates:
           - "junit:*"
           - "org.mockito:*"
     open-pull-requests-limit: 7
+  # Maven in /gtfs/pom.xml
+  - package-ecosystem: "maven"
+    directory: "/gtfs"
+    schedule:
+      interval: "weekly"
+      day: "wednesday"
+      time: "16:00"
+      timezone: "America/Montreal"
+    assignees:
+      - "montransit"
+    open-pull-requests-limit: 7

.gitignore

@@ -2,4 +2,8 @@
 *.iml
 
 # TOML Dependency updater file
-*.updates.toml
+*.updates.toml
+
+# Gradle local caches and build outputs
+shared/.gradle/
+shared/build/

gtfs/gtfs-validator.sh

@@ -27,9 +27,48 @@ fi
 # gh release list --limit 1 --repo github.com/MobilityData/gtfs-validator;
 # echo "> GTFS Validator latest release... DONE";
 
-JAR_FILE_PATTERN="$SCRIPT_DIR/gtfs-validator-*.jar";
-JAR_FILES=($JAR_FILE_PATTERN);
-JAR_FILE="${JAR_FILES[0]}";
+VERSION_FILE="$SCRIPT_DIR/pom.xml";
+if [ ! -f "$VERSION_FILE" ]; then
+    echo "> GTFS Validator version file '$VERSION_FILE' not found!";
+    exit 1;
+fi
+if ! command -v mvn >/dev/null 2>&1; then
+    echo "> Maven CLI is required to resolve GTFS Validator version!";
+    exit 1;
+fi
+GTFS_VALIDATOR_VERSION=$(mvn -q -f "$VERSION_FILE" help:evaluate -Dexpression=gtfs.validator.version -DforceStdout);
+MVN_RESULT=$?;
+if [[ ${MVN_RESULT} -ne 0 ]]; then
+    echo "> Error while resolving GTFS Validator version from '$VERSION_FILE'!";
+    exit ${MVN_RESULT};
+fi
+if [ -z "$GTFS_VALIDATOR_VERSION" ]; then
+    echo "> GTFS Validator version not found in '$VERSION_FILE'!";
+    exit 1;
+fi
+JAR_FILE="$SCRIPT_DIR/gtfs-validator-$GTFS_VALIDATOR_VERSION-cli.jar";
+if [ ! -f "$JAR_FILE" ]; then
+    if ! command -v gh >/dev/null 2>&1; then
+        echo "> GitHub CLI (gh) is required to download GTFS Validator '$GTFS_VALIDATOR_VERSION' (https://cli.github.com/)!";
+        exit 1;
+    fi
+    echo "> Downloading GTFS Validator '$GTFS_VALIDATOR_VERSION'...";
+    gh release download "v$GTFS_VALIDATOR_VERSION" \
+      --repo MobilityData/gtfs-validator \
+      --pattern "gtfs-validator-$GTFS_VALIDATOR_VERSION-cli.jar" \
+      --dir "$SCRIPT_DIR";
+    DOWNLOAD_RESULT=$?;
+    if [[ ${DOWNLOAD_RESULT} -ne 0 ]]; then
+        echo "> Error while downloading GTFS Validator '$GTFS_VALIDATOR_VERSION'!";
+        exit ${DOWNLOAD_RESULT};
+    fi
+    if [ ! -s "$JAR_FILE" ]; then
+        echo "> Downloaded GTFS Validator JAR '$JAR_FILE' is missing or empty!";
+        exit 1;
+    fi
+    echo "> Downloading GTFS Validator '$GTFS_VALIDATOR_VERSION'... DONE";
+fi
+echo "> GTFS Validator version: '$GTFS_VALIDATOR_VERSION'.";
 echo "> GTFS Validator JAR file: '$JAR_FILE'.";
 
 echo "> Launching GTFS Validator...";

gtfs/pom.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>org.mtransitapps.commons</groupId>
+    <artifactId>gtfs-validator-version</artifactId>
+    <version>1.0.0</version>
+
+    <properties>
+        <gtfs.validator.version>8.0.1</gtfs.validator.version>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.mobilitydata.gtfs-validator</groupId>
+            <artifactId>gtfs-validator-main</artifactId>
+            <version>${gtfs.validator.version}</version>
+        </dependency>
+    </dependencies>
+</project>