nix-super/src/libstore/common-ssh-store-config.cc

#include <regex>

#include "common-ssh-store-config.hh"
#include "ssh.hh"

namespace nix {

static std::string extractConnStr(std::string_view scheme, std::string_view _connStr)
{
    if (_connStr.empty())
        throw UsageError("`%s` store requires a valid SSH host as the authority part in Store URI", scheme);

    std::string connStr{_connStr};

    std::smatch result;
    static std::regex v6AddrRegex("^((.*)@)?\\[(.*)\\]$");

    if (std::regex_match(connStr, result, v6AddrRegex)) {
        connStr = result[1].matched ? result.str(1) + result.str(3) : result.str(3);
    }

    return connStr;
}

CommonSSHStoreConfig::CommonSSHStoreConfig(std::string_view scheme, std::string_view host, const Params & params)
    : StoreConfig(params)
    , host(extractConnStr(scheme, host))
{
}

SSHMaster CommonSSHStoreConfig::createSSHMaster(bool useMaster, Descriptor logFD)
{
    return {
        host,
        sshKey.get(),
        sshPublicHostKey.get(),
        useMaster,
        compress,
        logFD,
    };
}

}