[jnimarshalmethod-gen] Add --types option (#355)

The new `jnimarshalmethod-gen --types=FILE` option is a more
convenient "overload" of `jnimarshalmethod-gen --type=REGEX`,
allowing the regular expressions to be read from `FILE` instead of
as separate `-t REGEX` options.

In addition to single-line regular expressions, `FILE` may also
contain empty lines or lines which start with a `#`, which is ignored
so that it may be treated as a comment.

Author: radekdoulik

tools/jnimarshalmethod-gen/App.cs

@@ -93,6 +93,11 @@ List<string> ProcessArguments (string [] args)
 				{ "h|help|?",
 				  "Show this message and exit",
 				  v => help = v != null },
+				{ "types=",
+				  "Generate marshaling methods only for types whose names match regex patterns listed {FILE}.\n" +
+				  "One regex pattern per line.\n" +
+				  "Empty lines and lines starting with '#' character are ignored as comments.",
+				  v => LoadTypes (v) },
 				{ "t|type=",
 				  "Generate marshaling methods only for types whose names match {TYPE-REGEX}.",
 				  v => typeNameRegexes.Add (new Regex (v)) },
@@ -116,6 +121,24 @@ List<string> ProcessArguments (string [] args)
 			return assemblies;
 		}
 
+		void LoadTypes (string typesPath)
+		{
+			try {
+				foreach (var line in File.ReadLines (typesPath)) {
+					if (string.IsNullOrWhiteSpace (line))
+						continue;
+
+					if (line [0] == '#')
+						continue;
+
+					typeNameRegexes.Add (new Regex (line));
+				}
+			} catch (Exception e) {
+				Error ($"Unable to read profile '{typesPath}'.{Environment.NewLine}{e}");
+				Environment.Exit (4);
+			}
+		}
+
 		void ProcessAssemblies (List<string> assemblies)
 		{
 			CreateJavaVM (jvmDllPath);
@@ -153,7 +176,7 @@ void ProcessAssemblies (List<string> assemblies)
 				try {
 					CreateMarshalMethodAssembly (assembly);
 				} catch (Exception e) {
-					Error ($"Unable to process assembly '{assembly}'\n{e.Message}\n{e}");
+					Error ($"Unable to process assembly '{assembly}'{Environment.NewLine}{e.Message}{Environment.NewLine}{e}");
 					Environment.Exit (1);
 				}
 			}
@@ -168,7 +191,7 @@ void CreateJavaVM (string jvmDllPath)
 			try {
 				builder.CreateJreVM ();
 			} catch (Exception e) {
-				Error ($"Unable to create Java VM\n{e}");
+				Error ($"Unable to create Java VM{Environment.NewLine}{e}");
 				Environment.Exit (3);
 			}
 		}