Fix passing cursor position to findSuggestions()

application/argumentparser.cpp

@@ -938,9 +938,11 @@ void ArgumentParser::readArgs(int argc, const char *const *argv)
         return;
     }
 
-    // if the first argument (after executable name) is "--bash-completion-for", bash completion for the following arguments is requested
-    bool completionMode = !strcmp(*++argv, "--bash-completion-for");
-    unsigned int currentWordIndex;
+    // check for completion mode: if first arg (after executable name) is "--bash-completion-for", bash completion for the following arguments is requested
+    const bool completionMode = !strcmp(*++argv, "--bash-completion-for");
+
+    // determine the index of the current word for completion and the number of arguments to be passed to ArgumentReader
+    unsigned int currentWordIndex, argcForReader;
     if (completionMode) {
         // the first argument after "--bash-completion-for" is the index of the current word
         try {
@@ -951,21 +953,26 @@ void ArgumentParser::readArgs(int argc, const char *const *argv)
         } catch (const ConversionException &) {
             currentWordIndex = static_cast<unsigned int>(argc - 1);
         }
+        argcForReader = min(static_cast<unsigned int>(argc), currentWordIndex + 1);
+    } else {
+        argcForReader = static_cast<unsigned int>(argc);
     }
 
     // read specified arguments
-    ArgumentReader reader(*this, argv,
-        argv + (completionMode ? min(static_cast<unsigned int>(argc), currentWordIndex + 1) : static_cast<unsigned int>(argc)), completionMode);
+    ArgumentReader reader(*this, argv, argv + argcForReader, completionMode);
     const bool allArgsProcessed(reader.read());
     NoColorArgument::apply();
+
+    // fail when not all arguments could be processed, except when in completion mode
     if (!completionMode && !allArgsProcessed) {
-        const auto suggestions(findSuggestions(argc, argv, currentWordIndex, reader));
+        const auto suggestions(findSuggestions(argc, argv, static_cast<unsigned int>(argc - 1), reader));
         throw Failure(argsToString("The specified argument \"", *reader.argv, "\" is unknown.", suggestions));
     }
 
+    // print Bash completion and prevent the applicaton to continue with the regular execution
     if (completionMode) {
         printBashCompletion(argc, argv, currentWordIndex, reader);
-        exitFunction(0); // prevent the applicaton to continue with the regular execution
+        exitFunction(0);
     }
 }
 

tests/argumentparsertests.cpp

@@ -199,6 +199,16 @@ void ArgumentParserTests::testParsing()
         CPPUNIT_ASSERT_EQUAL("The specified argument \"album\" is unknown.\nDid you mean get or help?"s, string(e.what()));
     }
 
+    // error about unknown argument: mistake in final argument
+    const char *argv18[] = { "tageditor", "get", "album", "title", "diskpos", "--verbose", "--fi" };
+    try {
+        parser.resetArgs();
+        parser.parseArgs(7, argv18);
+        CPPUNIT_FAIL("Exception expected.");
+    } catch (const Failure &e) {
+        CPPUNIT_ASSERT_EQUAL("The specified argument \"--fi\" is unknown.\nDid you mean files or no-color?"s, string(e.what()));
+    }
+
     // warning about unknown argument
     parser.setUnknownArgumentBehavior(UnknownArgumentBehavior::Warn);
     // redirect stderr to check whether warnings are printed correctly