Yash - Yet Another Shell

Yash is a C++17 header-only minimal shell for embedded devices with support for command completion.

It was created as a serial port shell but can be used for other interfaces as well by using setPrint(). The prompt can be customized with setPrompt() and commands are added as a std::array which can be constexpr to save memory. The command history size can be adjusted by the constructor (default 10). An example can be seen below (taken from example.cpp and what is demoed in the image above).

#include <Yash.h>

void i2cRead(const std::vector<std::string>& args)
{
    printf("i2cRead(%s, %s, %s)\n", args.at(0).c_str(), args.at(1).c_str(), args.at(2).c_str());
}

void i2cWrite(const std::vector<std::string>& args)
{
    printf("i2cWrite(%s, %s, %s)\n", args.at(0).c_str(), args.at(1).c_str(), args.at(2).c_str());
}

void info(const std::vector<std::string>&)
{
    printf("info()\n");
}

int main()
{
    static constexpr std::array<Yash::Command, 3> commands {
        { { "i2c read", "I2C read <addr> <reg> <bytes>", [](const auto& args) { i2cRead(args); }, 3 },
            { "i2c write", "I2C write <addr> <reg> <value>", [](const auto& args) { i2cWrite(args); }, 3 },
            { "info", "System info", [](const auto& args) { info(args); }, 0 } }
    };

    Yash::Yash<std::size(commands)> yash(commands);
    yash.setPrint([&](const char* str) { printf("%s", str); });
    yash.setPrompt("$ ");

    while (true)
        yash.setCharacter(getch());

    return 0;
}