Add skip directive to raw templater

src/RawTemplater/Templating/Templater.cpp

@@ -170,6 +170,7 @@ namespace templating
               m_filename(std::move(filename)),
               m_output_directory(outputDirectory),
               m_first_line(true),
+              m_skip_pass(false),
               m_write_output_to_file(false)
         {
             fs::path filenamePath(m_filename);
@@ -187,7 +188,7 @@ namespace templating
             for (const auto& activeVariation : m_active_variations)
                 activeVariation->Apply(m_current_pass.m_defines_proxy.get());
 
-            while (!m_current_pass.m_stream->Eof())
+            while (!m_skip_pass && !m_current_pass.m_stream->Eof())
             {
                 auto nextLine = m_current_pass.m_stream->NextLine();
 
@@ -211,6 +212,9 @@ namespace templating
                 }
             }
 
+            if (m_skip_pass)
+                return true;
+
             if (!m_write_output_to_file)
             {
                 if (!OpenOutputStream())
@@ -305,6 +309,18 @@ namespace templating
             return true;
         }
 
+        bool SkipPass() override
+        {
+            if (m_write_output_to_file)
+            {
+                std::cerr << "Cannot skip when already writing to file\n";
+                return false;
+            }
+
+            m_skip_pass = true;
+            return true;
+        }
+
     private:
         bool OpenOutputStream()
         {
@@ -333,6 +349,7 @@ namespace templating
         const fs::path m_output_directory;
 
         bool m_first_line;
+        bool m_skip_pass;
         bool m_write_output_to_file;
         std::ofstream m_output_stream;
         std::ostringstream m_output_cache;

src/RawTemplater/Templating/TemplatingStreamProxy.cpp

@@ -122,6 +122,22 @@ bool TemplatingStreamProxy::MatchFilenameDirective(const ParserLine& line, const
     return true;
 }
 
+bool TemplatingStreamProxy::MatchSkipDirective(const ParserLine& line, const unsigned directiveStartPosition, const unsigned directiveEndPosition) const
+{
+    auto currentPosition = directiveStartPosition;
+
+    if (directiveEndPosition - directiveStartPosition != std::char_traits<char>::length(SKIP_DIRECTIVE)
+        || !MatchString(line, currentPosition, SKIP_DIRECTIVE, std::char_traits<char>::length(SKIP_DIRECTIVE)))
+    {
+        return false;
+    }
+
+    if (!m_templater_control->SkipPass())
+        throw ParsingException(TokenPos(*line.m_filename, line.m_line_number, 1), "skip directive failed");
+
+    return true;
+}
+
 bool TemplatingStreamProxy::MatchDirectives(const ParserLine& line) const
 {
     unsigned directiveStartPos, directiveEndPos;
@@ -133,7 +149,8 @@ bool TemplatingStreamProxy::MatchDirectives(const ParserLine& line) const
 
     return MatchSwitchDirective(line, directiveStartPos, directiveEndPos)
         || MatchOptionsDirective(line, directiveStartPos, directiveEndPos)
-        || MatchFilenameDirective(line, directiveStartPos, directiveEndPos);
+        || MatchFilenameDirective(line, directiveStartPos, directiveEndPos)
+        || MatchSkipDirective(line, directiveStartPos, directiveEndPos);
 }
 
 ParserLine TemplatingStreamProxy::NextLine()

src/RawTemplater/Templating/TemplatingStreamProxy.h

@@ -21,6 +21,7 @@ namespace templating
         virtual bool AddSwitch(std::string switchName) = 0;
         virtual bool AddOptions(std::string optionsName, std::vector<std::string> optionValues) = 0;
         virtual bool SetFileName(const std::string& fileName) = 0;
+        virtual bool SkipPass() = 0;
     };
 
     class TemplatingStreamProxy final : public AbstractDirectiveStreamProxy
@@ -40,10 +41,12 @@ namespace templating
         static constexpr const char* SWITCH_DIRECTIVE = "switch";
         static constexpr const char* OPTIONS_DIRECTIVE = "options";
         static constexpr const char* FILENAME_DIRECTIVE = "filename";
+        static constexpr const char* SKIP_DIRECTIVE = "skip";
 
         _NODISCARD bool MatchSwitchDirective(const ParserLine& line, unsigned directiveStartPosition, unsigned directiveEndPosition) const;
         _NODISCARD bool MatchOptionsDirective(const ParserLine& line, unsigned directiveStartPosition, unsigned directiveEndPosition) const;
         _NODISCARD bool MatchFilenameDirective(const ParserLine& line, unsigned directiveStartPosition, unsigned directiveEndPosition) const;
+        _NODISCARD bool MatchSkipDirective(const ParserLine& line, unsigned directiveStartPosition, unsigned directiveEndPosition) const;
         _NODISCARD bool MatchDirectives(const ParserLine& line) const;
 
         IParserLineStream* const m_stream;