feat: Add quiet CLI flag to silence informational outputs

cli/src/main/java/org/mobilitydata/gtfsvalidator/cli/Arguments.java

@@ -114,6 +114,11 @@ public class Arguments {
       description = "Output JSON report to stdout instead of writing to files (conflicts with -o)")
   private boolean stdoutOutput = false;
 
+  @Parameter(
+      names = {"-q", "--quiet"},
+      description = "Silences non-critical log messages when running validator")
+  private boolean quiet = false;
+
   ValidationRunnerConfig toConfig() throws URISyntaxException {
     ValidationRunnerConfig.Builder builder = ValidationRunnerConfig.builder();
     if (input != null) {
@@ -149,6 +154,7 @@ ValidationRunnerConfig toConfig() throws URISyntaxException {
     builder.setPrettyJson(pretty);
     builder.setSkipValidatorUpdate(skipValidatorUpdate);
     builder.setStdoutOutput(stdoutOutput);
+    builder.setQuietLogs(quiet);
     return builder.build();
   }
 
@@ -172,6 +178,10 @@ public boolean getStdoutOutput() {
     return stdoutOutput;
   }
 
+  public boolean getQuietLogs() {
+    return quiet;
+  }
+
   /**
    * @return true if CLI parameter combination is legal, otherwise return false
    */

main/src/main/java/org/mobilitydata/gtfsvalidator/runner/ValidationRunner.java

@@ -106,8 +106,10 @@ public Status run(ValidationRunnerConfig config) {
     }
     GtfsFeedLoader feedLoader = new GtfsFeedLoader(ClassGraphDiscovery.discoverTables());
 
+    if (!config.quietLogs()) {
     logger.atInfo().log("validation config:\n%s", config);
     logger.atInfo().log("validators:\n%s", validatorLoader.listValidators());
+    }
 
     final long startNanos = System.nanoTime();
     // Input.
@@ -248,8 +250,10 @@ public static void printSummary(
       logger.atWarning().log(b.toString());
     }
 
+    if (!config.quietLogs()) {
     logger.atInfo().log("Validation took %.3f seconds%n", feedMetadata.validationTimeSeconds);
     logger.atInfo().log(feedContainer.tableTotalsText());
+    }
   }
 
   /**

main/src/main/java/org/mobilitydata/gtfsvalidator/runner/ValidationRunnerConfig.java

@@ -69,6 +69,9 @@ public Path systemErrorsReportPath() {
   // If true, output JSON report to stdout instead of writing to files
   public abstract boolean stdoutOutput();
 
+  // If true, the validation runner will not print informational logging messages
+  public abstract boolean quietLogs();
+
   public static Builder builder() {
     // Set reasonable defaults where appropriate.
     return new AutoValue_ValidationRunnerConfig.Builder()
@@ -80,7 +83,8 @@ public static Builder builder() {
         .setCountryCode(CountryCode.forStringOrUnknown(CountryCode.ZZ))
         .setDateForValidation(LocalDate.now())
         .setSkipValidatorUpdate(false)
-        .setStdoutOutput(false);
+        .setStdoutOutput(false)
+        .setQuietLogs(false);
   }
 
   @AutoValue.Builder
@@ -109,6 +113,8 @@ public abstract static class Builder {
 
     public abstract Builder setStdoutOutput(boolean stdoutOutput);
 
+    public abstract Builder setQuietLogs(boolean quietLogs);
+
     public abstract ValidationRunnerConfig build();
   }
 }

main/src/test/java/org/mobilitydata/gtfsvalidator/reportsummary/model/JsonReportSummaryGeneratorTest.java

@@ -47,6 +47,7 @@ private static ValidationRunnerConfig generateValidationRunnerConfig() throws Ex
     builder.setValidationReportFileName("some_report_filename");
     builder.setDateForValidation(LocalDate.parse("2020-01-02"));
     builder.setStdoutOutput(false);
+    builder.setQuietLogs(false);
 
     return builder.build();
   }