Can I specify a minimum version of Dub or DMD?

Question

People keep trying to build my project with old versions of Dmd and Dub (0.9.2 instead of 1.0.0), and this will not work. Can I specify the minimum version of dub in the dub.json file?

Answer 1

Sorry, you can’t. See this issue for more details . Please make a noise there; -)

Two ideas on how to get around this now.

1) Use static if in the main statement

int main()
{
   static if (__VERSION__ < 2069)
   {
       pragma(msg, "Your DMD version is outdated. Please update");
       return 1;
   }
   ...
}

2) Use preGenerateCommands = ['rdmd checkversions.d']

int main()
{
    import std.process : execute;
    import std.stdio : writeln;
    auto ver = execute(["dub", "--version"]);
    if (ver.status != 0)
    {
        writeln("Error: no dub installation found.");
    }
    else
    {
        import std.conv : to;
        import std.regex : ctRegex, matchFirst;
        auto ctr = ctRegex!`version ([0-9]+)[.]([0-9]+)[.]([0-9]+)`;
        auto r = ver.output.matchFirst(ctr);
        assert(r.length == 4, "version not found");
        int major = r[1].to!int, minor = r[2].to!int, patch = r[3].to!int;
        if (major < 2)
        {
            writeln(minor);
            return 1;
        }
    }
}