when developing in nix i usually use builtins.trace for debugging:
in code
a = { foo = "bar"; ... more complex nested attrset ...};
builtins.trace a a;
in nix-repl
using :p a on a complex data structure is really hard to read also.
the problem
however, the output is just a single line without any formating and for complex data structure this is barely usable for debugging.
the question
is there a pretty print function in nix which does some indentation and adding of newline? or even better colored output?
ideal output
i'd like to see something like this:
default = {
active = {
check_ssl = [
{
tags = [ "mycustomtag" ];
host = "kotalla.de";
ipv6 = false;
name = "ssl11";
}
{
tags = [ "mycustomtag" ];
host = "kotalla.de";
ipv6 = false;
name = "ssl2";
}
];
check_http = [
{
host = "kotalla.de";
port = 80;
url = "/foo";
contains = "Labor";
name = "http";
}
];
check_ssh = [
{
host = "mail.lastlog.de";
port = 20202;
name = "ssh";
}
];
};
my hack
https://github.com/kamilchm/go2nix/issues/22#issuecomment-347693233
what i'm aware of:
https://github.com/NixOS/nix/issues/832
https://github.com/Gabriel439/nixfmt
we've now written our own formatter:
https://github.com/nixcloud/nix-beautify
Nixfmt is a popular Nix code formatter:
https://github.com/Gabriel439/nixfmt
https://github.com/haskell-nix/hnix/tree/50e63f80afa8323b25b692533e731eea641e56af#parse--print
To parse a file with hnix and pretty print the result:
hnix file.nix
Related
I'm trying to override the package.loaded table in the scope of a function using setfenv, but it's not quite working.
local env = {
require = require,
print = print,
package = {
cpath = package.cpath,
loadlib = package.loadlib,
path = package.path,
preload = package.preload,
seeall = package.seeall,
loaded = {
foobar = {
fn = function() print("hello world") end,
},
},
},
}
setfenv(assert(loadstring("require('foobar')")), env)()
Executing the above code, will result in a error because the module foobar isn't found.
It seems that it's for some reason not picking up the package table override that I've specified in the environment.
How do I make this work?
Faced such problem: it is necessary to use values from other module script in one module script. Both module scripts contain tables with float, boolean and string values. How in theory can this be done and is it possible at all? And if not, what are the alternative solutions? I read on the forum that this can be done, but how exactly was not explained anywhere.
For example.
One module script:
local characters = {
["CharacterOne"] = {
["Health"] = 100,
["InGroup"] = false,
["Eating"] = {"Fruit", "Meat"}
};
["CharacterTwo"] = {
["Health"] = 260,
["InGroup"] = true,
["Eating"] = {"Meat"}
}
}
return characters
Two module script:
local food = {
["Fruit"] = {
["Saturation"] = 20,
["Price"] = 2
},
["Meat"] = {
["Saturation"] = 50,
["Price"] = 7
}
}
return food
The documentation for ModuleScripts tells you how to use them in other source containers: the require function.
So assuming that you've named your ModuleScripts Characters and Food respectively, and assuming that they are siblings in a folder, you could utilize the require function like this :
local Food = require(script.Parent.Food)
local characters = {
["CharacterOne"] = {
["Health"] = 100,
["InGroup"] = false,
["Eating"] = { Food.Fruit, Food.Meat }
};
["CharacterTwo"] = {
["Health"] = 260,
["InGroup"] = true,
["Eating"] = { Food.Meat }
}
}
return characters
I'm using nvim-cmpto have a contextual window to display my LSP suggestions and my snippets but when I open multiple buffers, I have an issue : the same source is added multiple times to nvim-cmp causing the same result to be repeated in the popup.
For example, here is the result of :CmpStatus: after a few minutes of work.
# ready source names
- vsnip
- buffer
- nvim_lsp:pylsp
- vsnip
- nvim_lsp:pylsp
- nvim_lsp:pylsp
Here is my nvim-cmpconfig :
cmp.setup({
snippet = {
expand = function(args)
vim.fn["vsnip#anonymous"](args.body)
end,
},
...
sources = {
{ name = 'vsnip' },
{ name = 'nvim_lua' },
{ name = 'nvim_lsp' },
{ name = 'buffer', keyword_length = 3 }
},
}
Does anyone know how to adress this issue ? Is it a problem with my configuration ?
In your cmp configuration, you can use the dup keyword for vim_item with the formatting option / format function. See help for complete-item for explanations (:help complete-item).
cmp.setup({
formatting = {
format = function(entry, vim_item)
vim_item.menu = ({
nvim_lsp = '[LSP]',
vsnip = '[Snippet]',
nvim_lua = '[Nvim Lua]',
buffer = '[Buffer]',
})[entry.source.name]
vim_item.dup = ({
vsnip = 0,
nvim_lsp = 0,
nvim_lua = 0,
buffer = 0,
})[entry.source.name] or 0
return vim_item
end
}
})
You can see details in this feature request for nvim-cmp plugin.
I had the same problem and managed to solve the issue by realizing that cmp is somehow installed twice.
Try removing or better first renaming the cmp-packages in the plugged directory, for example
cmp-nvim-lsp to cmp-nvim-lsp_not
cml-nvim-buffer to cmp-nvim-buffer_not
etc.
This did the job for me.
I'm trying to write my own NeoVim Lua based config, stripped down to the minimum I need and with the goal to understand at least most of the config. LSP setup is working fine and is the only source I configured for nvim-cmp:
local cmp = require("cmp")
cmp.setup {
sources = {
{ name = 'nvim_lsp' }
}
}
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
After some startup delay the completion is working in the sense that I see popups with proposed completions, based on information from LSP.
But I cannot select any of the proposed completions. I can just continue to type which reduces the proposed completions, but I cannot use tab, arrow keys, ... to select an entry from the popup. I saw in the docs that one can define keyboard mappings but cannot make sense out of them. They are all rather sophisticated, require a snippet package to be installed, ...
I would prefer to select the next completion via tab and to navigate them via arrow key. "Enter" should select the current one.
Could somebody show me a minimal configuration for this setup or point me to more "basic" docs?
Nvim-cmp requires you to set the mapping for tab and other keys explicitly, here is my working example:
local cmp = require'cmp'
local lspkind = require'lspkind'
cmp.setup({
snippet = {
expand = function(args)
-- For `ultisnips` user.
vim.fn["UltiSnips#Anon"](args.body)
end,
},
mapping = cmp.mapping.preset.insert({
['<Tab>'] = function(fallback)
if cmp.visible() then
cmp.select_next_item()
else
fallback()
end
end,
['<S-Tab>'] = function(fallback)
if cmp.visible() then
cmp.select_prev_item()
else
fallback()
end
end,
['<CR>'] = cmp.mapping.confirm({ select = true }),
['<C-e>'] = cmp.mapping.abort(),
['<Esc>'] = cmp.mapping.close(),
['<C-d>'] = cmp.mapping.scroll_docs(-4),
['<C-f>'] = cmp.mapping.scroll_docs(4),
}),
sources = {
{ name = 'nvim_lsp' }, -- For nvim-lsp
{ name = 'ultisnips' }, -- For ultisnips user.
{ name = 'nvim_lua' }, -- for nvim lua function
{ name = 'path' }, -- for path completion
{ name = 'buffer', keyword_length = 4 }, -- for buffer word completion
{ name = 'omni' },
{ name = 'emoji', insert = true, } -- emoji completion
},
completion = {
keyword_length = 1,
completeopt = "menu,noselect"
},
view = {
entries = 'custom',
},
formatting = {
format = lspkind.cmp_format({
mode = "symbol_text",
menu = ({
nvim_lsp = "[LSP]",
ultisnips = "[US]",
nvim_lua = "[Lua]",
path = "[Path]",
buffer = "[Buffer]",
emoji = "[Emoji]",
omni = "[Omni]",
}),
}),
},
})
This is working great for me. The mapping part corresponds to the config for key mapping in the table. You can tweak your conf based on my config to make it work for you.
I've been attempting to get cross-compilation to an iOS target working via nix. My tenative expression starts out like this:
{iphone ? false}:
let
crossSystem = if iphone then {
config = "aarch64-apple-ios";
sdkVer = "13.7";
xcodeVer = "11";
xcodePlatform = "iPhoneOS";
useiOSPrebuilt = true;
platform = {};
} else null;
pkgs_fn = (import ../repo.nix).nixos_2009;
cmake = (pkgs_fn {}).cmake;
pkgs = pkgs_fn { config.allowUnfree = true; crossSystem = crossSystem; };
in
pkgs.stdenv.mkDerivation rec {
nativeBuildInputs = [
cmake
];
buildInputs = [
pkgs.zlib
# ...
];
}
The problem I run into is that the current xcode package does not have hashes that seem to correspond to any version I can download on Apple's website. In addition, the versions it nominally supports are extremely old (only the 10.x series and 11).
What's the idiomatic way to get this working? Thanks.