Lua method to get Minetest master directory

[Leifanator]

I am having some issues with mod programming where this would be very helpful. On the Dev Wiki, I see minetest.get_modpath() for individual mod folders, but I need something that can get the "mods" folder itself. While at it, something like minetest.get_masterpath() might be useful to some modders as well.

[PilzAdam]

There are several mod paths, not only one.

Why do you need it, though?

[webdesigner97]

You could extract the minetest path out of minetest.get_worldpath()

[webdesigner97]

See this function (ported from PHP to Lua):

Code: Select all

function explode(div,str)
    if (div == '') then
        return nil
    else
        local pos,arr = 0,{}
        for st,sp in function() return string.find(str,div,pos,true) end do
            table.insert(arr,string.sub(str,pos,st-1))
            pos = sp + 1
        end
        table.insert(arr,string.sub(str,pos))
        return arr
    end
end

It splits a string (str) at every occurence of <div> and returns it as a list:

Code: Select all

local minetestpath = minetest.get_worldpath()
 --> C:\Users\Christian\Desktop\Minetest\bin\..\worlds\Singleplayer

minetestpath = explode("\\",minetestpath)
 --> {"C:","Users","Christian","Desktop","Minetest","bin","..","worlds","Singleplayer"}
 -- Now we remove the last four strings in the list and we have the minetest dir

minetestpath[table.getn(minetestpath) - 0] = nil
minetestpath[table.getn(minetestpath) - 1] = nil
minetestpath[table.getn(minetestpath) - 2] = nil
minetestpath[table.getn(minetestpath) - 3] = nil
 --> {"C:","Users","Christian","Desktop","Minetest"}

 -- Convert it to a string
 minetestpath = table.concat(minetestpath,"\\")

This should work, but I didn't test it

[PilzAdam]

See this function (ported from PHP to Lua):

Code: Select all

function explode(div,str)
    if (div == '') then
        return nil
    else
        local pos,arr = 0,{}
        for st,sp in function() return string.find(str,div,pos,true) end do
            table.insert(arr,string.sub(str,pos,st-1))
            pos = sp + 1
        end
        table.insert(arr,string.sub(str,pos))
        return arr
    end
end

It splits a string (str) at every occurence of <div> and returns it as a list:

Code: Select all

local minetestpath = minetest.get_worldpath()
 --> C:\Users\Christian\Desktop\Minetest\bin\..\worlds\Singleplayer

minetestpath = explode("",minetestpath)
 --> {"C:","Users","Christian","Desktop","Minetest","bin","..","worlds","Singleplayer"}
 -- Now we remove the last four strings in the list and we have the minetest dir

minetestpath[table.getn(minetestpath) - 0] = nil
minetestpath[table.getn(minetestpath) - 1] = nil
minetestpath[table.getn(minetestpath) - 2] = nil
minetestpath[table.getn(minetestpath) - 3] = nil
 --> {"C:","Users","Christian","Desktop","Minetest"}

 -- Convert it to a string
 minetestpath = table.concat(minetestpath,"")

This should work, but I didn't test it

And why dont you use string:split()? https://github.com/minetest/minetest/bl ... .txt#L1046

[webdesigner97]

See this function (ported from PHP to Lua):

Code: Select all

function explode(div,str)
    if (div == '') then
        return nil
    else
        local pos,arr = 0,{}
        for st,sp in function() return string.find(str,div,pos,true) end do
            table.insert(arr,string.sub(str,pos,st-1))
            pos = sp + 1
        end
        table.insert(arr,string.sub(str,pos))
        return arr
    end
end

It splits a string (str) at every occurence of <div> and returns it as a list:

Code: Select all

local minetestpath = minetest.get_worldpath()
 --> C:\Users\Christian\Desktop\Minetest\bin\..\worlds\Singleplayer

minetestpath = explode("",minetestpath)
 --> {"C:","Users","Christian","Desktop","Minetest","bin","..","worlds","Singleplayer"}
 -- Now we remove the last four strings in the list and we have the minetest dir

minetestpath[table.getn(minetestpath) - 0] = nil
minetestpath[table.getn(minetestpath) - 1] = nil
minetestpath[table.getn(minetestpath) - 2] = nil
minetestpath[table.getn(minetestpath) - 3] = nil
 --> {"C:","Users","Christian","Desktop","Minetest"}

 -- Convert it to a string
 minetestpath = table.concat(minetestpath,"")

This should work, but I didn't test it

And why dont you use string:split()? https://github.com/minetest/minetest/bl ... .txt#L1046

Cause I'm not that good at lua and don't know all functions (same for the API) But thx for the link

[Leifanator]

See this function (ported from PHP to Lua):

Code: Select all

function explode(div,str)
    if (div == '') then
        return nil
    else
        local pos,arr = 0,{}
        for st,sp in function() return string.find(str,div,pos,true) end do
            table.insert(arr,string.sub(str,pos,st-1))
            pos = sp + 1
        end
        table.insert(arr,string.sub(str,pos))
        return arr
    end
end

It splits a string (str) at every occurence of <div> and returns it as a list:

Code: Select all

local minetestpath = minetest.get_worldpath()
 --> C:\Users\Christian\Desktop\Minetest\bin\..\worlds\Singleplayer

minetestpath = explode("",minetestpath)
 --> {"C:","Users","Christian","Desktop","Minetest","bin","..","worlds","Singleplayer"}
 -- Now we remove the last four strings in the list and we have the minetest dir

minetestpath[table.getn(minetestpath) - 0] = nil
minetestpath[table.getn(minetestpath) - 1] = nil
minetestpath[table.getn(minetestpath) - 2] = nil
minetestpath[table.getn(minetestpath) - 3] = nil
 --> {"C:","Users","Christian","Desktop","Minetest"}

 -- Convert it to a string
 minetestpath = table.concat(minetestpath,"")

This should work, but I didn't test it

Thanks, that worked.

[kahrl]

Note that get_worldpath may at any point in the future collapse the "bin" and ".." parts, without warning. I think it already does if the world path was passed to minetest via the command line.

[webdesigner97]

Note that get_worldpath may at any point in the future collapse the "bin" and ".." parts, without warning. I think it already does if the world path was passed to minetest via the command line.

Yes, this might happen. But this function is more like a workaround, people can customize it if they think they need it or if it doesn't work correctly.