Is there a way to run a plugin command on startup?

[tomasriveral]

I want to run vivifyOpen (from https://codeberg.org/gibbert/micro-vivify) when i run micro and MICRO_VIVIFY is set to 1 (i. e. MICRO_VIVIFY=1 micro ./micro.nix).

This is what I tried with my init.lua:

config = import("micro/config")
function init()
    config.MakeCommand("vivifyMaybe", function(bp)
        if os.getenv("MICRO_VIVIFY") == "1" then
            bp:HandleCommand("vivifyOpen")
        end
    end)
end
function onBufferOpen(bp)
    --bp:HandleCommand("vivifyMaybe")
end

but it returns

Plugin initlua: init:2: attempt to index a non-table object(nil) with key 'MakeCommand'
stack traceback:
	init:2: in main chunk
	[G]: ?

Press enter to continue

making me think that import("micro/config") returns nil

[Andriamanitra]

That error message is not from the init.lua you posted (the error is about config being nil when calling config.MakeCommand on line 2, but in your init.lua config is defined and it's not called on line 2).

To run a command on startup you could use the postinit callback and micro.CurPane() to get a handle to current BufPane:

local micro = import("micro")

function postinit()
    local bp = micro.CurPane()
    bp:HandleCommand("vivifyMaybe")
end

But I think what you actually meant is to run it every time you open a file (not just on startup). You could use onBufPaneOpen, but then you won't catch events where you open a different file in the same pane with the open command:

local buffer = import("micro/buffer")

function onBufPaneOpen(bp)
    -- only run in normal bufpanes (ignore help, log, info, scratch, raw)
    if bp.Buf.Type.Kind == buffer.BTDefault then
        bp:HandleCommand("vivifyMaybe")
    end
end

To run some code any time a file is opened you would want to use the onBufferOpen callback but that one gives you a handle to a Buffer instead of a BufPane. And you can't use micro.CurPane() either because the BufPane doesn't exist yet when the first buffer is created. To work around this limitation I would just copy the code from the micro-vivify plugin and call it directly with the buffer instead of going through the command system, like this:

local buffer = import("micro/buffer")
local shell = import("micro/shell")

function vivifyOpen(buf)
    local currentLine = buf:GetActiveCursor().Loc.Y + 1
    shell.ExecCommand("viv", string.format("%s:%d", buf.AbsPath, currentLine))
end

function onBufferOpen(buf)
    if buf.Type.Kind == buffer.BTDefault then
        vivifyOpen(buf)
    end
end