cstamas commented on code in PR #200:
URL: https://github.com/apache/maven-resolver/pull/200#discussion_r991641318


##########
maven-resolver-impl/src/main/java/org/eclipse/aether/internal/impl/checksum/SummaryFileTrustedChecksumsSource.java:
##########
@@ -159,9 +178,63 @@ private ConcurrentHashMap<String, String> 
loadProvidedChecksums( Path checksumsF
         }
         else
         {
-            LOGGER.debug( "Checksums file '{}' not found", checksumsFile );
+            LOGGER.debug( "The {} trusted checksums for remote repository {} 
not exist at '{}'",
+                    checksumAlgorithmFactory.getName(), 
artifactRepository.getId(), checksumsFile );
         }
 
         return result;
     }
+
+    private String calculateSummaryPath( boolean originAware,
+                                         ArtifactRepository artifactRepository,
+                                         ChecksumAlgorithmFactory 
checksumAlgorithmFactory )
+    {
+        final String fileName;
+        if ( originAware )
+        {
+            fileName = CHECKSUMS_FILE_PREFIX + "-" + 
artifactRepository.getId();
+        }
+        else
+        {
+            fileName = CHECKSUMS_FILE_PREFIX;
+        }
+        return fileName + "." + checksumAlgorithmFactory.getFileExtension();
+    }
+
+    private class SummaryFileWriter implements Writer
+    {
+        private final Path basedir;
+
+        private final boolean originAware;
+
+        private SummaryFileWriter( Path basedir, boolean originAware )
+        {
+            this.basedir = basedir;
+            this.originAware = originAware;
+        }
+
+        @Override
+        public void addTrustedArtifactChecksums( Artifact artifact, 
ArtifactRepository artifactRepository,
+                                                 
List<ChecksumAlgorithmFactory> checksumAlgorithmFactories,
+                                                 Map<String, String> 
trustedArtifactChecksums ) throws IOException
+        {
+            for ( ChecksumAlgorithmFactory checksumAlgorithmFactory : 
checksumAlgorithmFactories )
+            {
+                String checksum = requireNonNull(
+                        trustedArtifactChecksums.get( 
checksumAlgorithmFactory.getName() ) );
+                String summaryLine = ArtifactIdUtils.toId( artifact ) + " " + 
checksum + "\n";
+                Path summaryPath = basedir.resolve(
+                        calculateSummaryPath( originAware, artifactRepository, 
checksumAlgorithmFactory ) );
+                Files.createDirectories( summaryPath.getParent() );
+                Files.write( summaryPath, summaryLine.getBytes( 
StandardCharsets.UTF_8 ),
+                        StandardOpenOption.CREATE, StandardOpenOption.WRITE, 
StandardOpenOption.APPEND );

Review Comment:
   Added 3c84701a16e7b60fea2252771f9beb83e3afb097



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