placeholder basesuffix for rename format

app/actions.cpp

@@ -1826,7 +1826,13 @@ int renameFile(std::string& newPath, const tm* tm) {
   std::string path = newPath;
   auto oldFsPath = fs::path(path);
   std::string format = Params::instance().format_;
+  std::string filename = p.stem().string();
+  std::string basesuffix = "";
+  int pos = filename.find('.');
+  if (pos > 0)
+   basesuffix = filename.substr(filename.find('.'));
   replace(format, ":basename:", p.stem().string());
+  replace(format, ":basesuffix:", basesuffix);
   replace(format, ":dirname:", p.parent_path().filename().string());
   replace(format, ":parentname:", p.parent_path().parent_path().filename().string());
 

app/exiv2.cpp

@@ -334,6 +334,7 @@ void Params::help(std::ostream& os) const {
      << _("   -r fmt  Filename format for the 'rename' action. The format string\n")
      << _("           follows strftime(3). The following keywords are also supported:\n")
      << _("             :basename:   - original filename without extension\n")
+     << _("             :basesuffix: - suffix in original filename, starts with first dot and ends before extension\n")
      << _("             :dirname:    - name of the directory holding the original file\n")
      << _("             :parentname: - name of parent directory\n") << _("           Default 'fmt' is %Y%m%d_%H%M%S\n")
      << _("   -c txt  JPEG comment string to set in the image.\n")

exiv2.md

@@ -458,6 +458,7 @@ also provided:
 | Variable       | Description                                                                                                                   |
 |:------         |:----                                                                                                                          |
 | :basename:     | Original filename without extension                                                                                           |
+| :basesuffix:   | Suffix in original filename, starts with first dot and ends before extension, e.g. PANO, MP, NIGHT added by Google Camera app |
 | :dirname:      | Name of the directory holding the original file                                                                               |
 | :parentname:   | Name of parent directory                                                                                                      |
 
@@ -491,6 +492,12 @@ exiv2.exe: File `./Stonehenge_16_Jul_2015.jpg' exists. [O]verwrite, [r]ename or
 Renaming file to ./Stonehenge_16_Jul_2015_1.jpg
 ```
 
+If the filename contains a suffix, which shall be included in new filename:
+```
+$ exiv2 --verbose --rename '%d_%b_%Y:basesuffix:' Stonehenge.PANO.jpg
+File 1/1: Stonehenge.PANO.jpg
+Renaming file to '16_Jul_2015.PANO'.jpg```
+
 <div id="adjust_time">
 
 ### **-a** *time*, **--adjust** *time*

test/data/test_reference_files/exiv2-test.out

@@ -140,6 +140,7 @@ Options:
    -r fmt  Filename format for the 'rename' action. The format string
            follows strftime(3). The following keywords are also supported:
              :basename:   - original filename without extension
+             :basesuffix: - suffix in original filename, starts with first dot and ends before extension
              :dirname:    - name of the directory holding the original file
              :parentname: - name of parent directory
            Default 'fmt' is %Y%m%d_%H%M%S