Add ExifTool.RunArgs method to run ExifTool without specifying a file.

Author: PolarGoose

README.md

@@ -306,6 +306,12 @@ exifToolStdOut = exifTool.Run("C:/someFile.png", ["-PNG:Copyright=Some copyright
 WScript.Echo(exifToolStdOut) // contains: "1 image files updated"
 ```
 
+Run ExifTool without specifying a file name.
+```javascript
+var res = exifTool.RunArgs(["-list"])
+WScript.Echo(res) // prints the list of available tags
+```
+
 ## UCharDet
 Detects the encoding of a text file using [UCharDet](https://www.freedesktop.org/wiki/Software/uchardet/).
 The list of supported encodings is described in the paragraph `Supported Languages/Encodings`.

src/DOpusScriptingExtensions/DOpusScriptingExtensions.idl

@@ -55,7 +55,8 @@ interface IMediaInfoRetriever : IDispatch
 interface IExifTool : IDispatch
 {
   [id(1)] HRESULT GetInfoAsJson([in] BSTR fileFullName, [in, defaultvalue(0)] IDispatch* tagNamesJsArray, [out, retval] BSTR* infoAsJson);
-  [id(2)] HRESULT Run([in] BSTR fileFullName, [in, defaultvalue(0)] IDispatch* commandLineArgs, [out, retval] BSTR* result);
+  [id(2)] HRESULT Run([in] BSTR fileFullName, [in] IDispatch* commandLineArgs, [out, retval] BSTR* result);
+  [id(3)] HRESULT RunArgs([in] IDispatch* commandLineArgs, [out, retval] BSTR* result);
 };
 
 [object, uuid(EA478603-BB0E-4024-9308-FC147D0443F4), dual, nonextensible, pointer_default(unique)]

src/DOpusScriptingExtensions/ExifTool/ExifTool.h

@@ -30,6 +30,12 @@ class ATL_NO_VTABLE CExifTool :
     return S_OK;
   } CATCH_ALL_EXCEPTIONS()
 
+  STDMETHOD(RunArgs)(IDispatch* commandLineArgs, BSTR* result) override try {
+    *result = Copy(
+      exifToolWrapper->RunArgs(ToUtf8StringVector(JsStringArrayToVector(commandLineArgs))));
+    return S_OK;
+  } CATCH_ALL_EXCEPTIONS()
+
 private:
   ExifToolWrapper* exifToolWrapper;
 };

src/DOpusScriptingExtensions/ExifTool/ExifToolCommandArgsGenerator.h

@@ -4,6 +4,8 @@
 // ExifTool requires so that each argument should be separated by a newline character.
 class ExifToolCommandArgsGenerator : boost::noncopyable {
 public:
+  ExifToolCommandArgsGenerator() = default;
+
   ExifToolCommandArgsGenerator(const std::wstring_view filePath) {
     if (!std::filesystem::exists(filePath)) {
       THROW_WEXCEPTION(L"File not found '{}'", filePath);

src/DOpusScriptingExtensions/ExifTool/ExifToolWrapper.h

@@ -49,6 +49,12 @@ class ExifToolWrapper : boost::noncopyable {
     return Execute(argsGenerator.GenerateExifToolInput());
   }
 
+  std::wstring RunArgs(const std::vector<std::string>& commandLineArgs) {
+    ExifToolCommandArgsGenerator argsGenerator;
+    argsGenerator.AddCommandLineArgs(commandLineArgs);
+    return Execute(argsGenerator.GenerateExifToolInput());
+  }
+
 private:
   std::wstring Execute(const std::string_view exifToolCommands) {
     ioCtx.restart();