warn missing files in verbose mode

Author: fa93hws

src/main/java/com/bazel_diff/BazelClient.java

@@ -69,7 +69,8 @@ private Map<String, BazelSourceFileTarget> processBazelSourcefileTargets(List<Bu
                 BazelSourceFileTargetImpl sourceFileTarget = new BazelSourceFileTargetImpl(
                         sourceFile.getName(),
                         digest.digest().clone(),
-                        readSourcefileTargets ? workingDirectory : null
+                        readSourcefileTargets ? workingDirectory : null,
+                        verbose
                 );
                 sourceTargets.put(sourceFileTarget.getName(), sourceFileTarget);
             }

src/main/java/com/bazel_diff/BazelSourceFileTarget.java

@@ -36,7 +36,7 @@ private void digestSmallFile(MessageDigest finalDigest, FileChannel inChannel) t
         finalDigest.update(buffer);
     }
 
-    BazelSourceFileTargetImpl(String name, byte[] digest, Path workingDirectory)
+    BazelSourceFileTargetImpl(String name, byte[] digest, Path workingDirectory, Boolean verbose)
         throws IOException, NoSuchAlgorithmException {
         this.name = name;
         MessageDigest finalDigest = MessageDigest.getInstance("SHA-256");
@@ -53,7 +53,11 @@ private void digestSmallFile(MessageDigest finalDigest, FileChannel inChannel) t
                 }
                 sourceFile.close();
                 inChannel.close();
-            } catch (FileNotFoundException e) {}
+            } catch (FileNotFoundException e) {
+                if (verbose) {
+                    System.out.printf("BazelDiff: [Warning] file %s not found%n", absoluteFilePath);
+                }
+            }
         }
         finalDigest.update(digest);
         finalDigest.update(name.getBytes());