Note that main is generally a work in progress, and you probably want to use a tagged release version.

If you have used version 3 or below, there are breaking changes in version 4. The entire command line arguments has been re-worked to be more in line with the unix/linux standards.

To use filesort you pass in the name of the file you want sorted along with several optional parameters.

• -i, --input arg, Source file to sort
• -o, --output arg, Destination file to write to
• -d, --descending, Sort file in descending order
• -v, --version, Filesort version
• -h, --help, Filesort help
• -l, --length arg, Number of characters to read, overrides -w
• -w, --word, Reads data in per word rather than per line
• --delim arg, Value to append to end of each sorted value defaults to newline

• filesort -i test.txt Sorts the file test.txt in ascending order
• filesort -i test.txt -o output.txt -d Reads the data from test.txt and writes it in descending order to output.txt

The only build requirement is a C++ compiler that supports C++17. I have tested using Visual Studio 2019, GCC 13.2.0, and Clang 17.0.6.

git clone --recursive https://github.com/jlechem/filesort

• Windows - Open the filesort.sln solution file in Visual Studio and build accordingly.
• Unix/Linux - In the filesort directory is a MAKEFILE, this should be used to build the project. Note it is currently set to GCC (see mac OS for clang) The following make commands are supported make make clean make install
• OS X (mac) - Run the following clang command clang++ -Wall -std=c++17 *.cpp -o filesort