Add an option to not extract temporary files

See: issue #12, issue #34

doc/innoextract.1

@@ -48,6 +48,7 @@ Here is a short summary of the options available in innoextract. Please refer to
 .TP
 .B Filters:
 .nf
+ \-m \-\-exclude\-temp       Don't extract temporary files
     \-\-language \fILANG\fP      Extract only files for this language
  \-I \-\-include \fIEXPR\fP       Extract only files that match this path
 .fi
@@ -73,6 +74,11 @@ will try to detect if the terminal supports shell escape codes and enable or dis
 \fB\-\-dump\fP
 Don't convert Windows paths to UNIX paths and don't substitute variables in paths.
 .TP
+\fB\-m\fP, \fB\-\-exclude\-temp\fP
+Don't extract files that would have been deleted at the end of the install process. Such files are marked with [temp] in the file listing.
+
+This option takes precedence over \fB\-\-include\fP and \fB\-\-language\fP: temporary files are never extracted when using the \fB\-\-exclude\-temp\fP, even if they match the selected language or include expressions.
+.TP
 \fB\-e\fP, \fB\-\-extract\fP
 Extract all files to the current directory. This action is enabled by default, unless either \fB\-\-list\fP or \fB\-\-extract\fP is specified. You may only specify one of \fB\-\-extract\fP and \fB\-\-test\fP.
 .TP

src/cli/extract.cpp

@@ -439,6 +439,10 @@ void process_file(const fs::path & file, const extract_options & o) {
 			continue; // Ignore external files (copy commands)
 		}
 		
+		if(!o.extract_temp && (file.options & setup::file_entry::DeleteAfterInstall)) {
+			continue; // Ignore temporary files
+		}
+		
 		if(!file.languages.empty()) {
 			if(!o.language.empty() && !setup::expression_match(o.language, file.languages)) {
 				continue; // Ignore other languages

src/cli/extract.hpp

@@ -54,6 +54,7 @@ struct extract_options {
 	bool preserve_file_times; //!< Set timestamps of extracted files
 	bool local_timestamps; //!< Use local timezone for setting timestamps
 	
+	bool extract_temp; //!< Extract temporary files
 	std::string language; //!< Extract only files for this language
 	std::vector<std::string> include; //!< Extract only files matching these patterns
 	

src/cli/main.cpp

@@ -146,6 +146,7 @@ int main(int argc, char * argv[]) {
 	
 	po::options_description filter("Filters");
 	filter.add_options()
+		("exclude-temp,m", "Don't extract temporary files")
 		("language", po::value<std::string>(), "Extract only files for this language")
 		("include,I", po::value< std::vector<std::string> >(), "Extract only files that match this path")
 	;
@@ -284,6 +285,7 @@ int main(int argc, char * argv[]) {
 		}
 	}
 	
+	o.extract_temp = (options.count("exclude-temp") == 0);
 	{
 		po::variables_map::const_iterator i = options.find("language");
 		if(i != options.end()) {