mkatychev

Cargo Dependency Resolution & Versioning

Condensed reference for Cargo's resolver.

How the Resolver Works

Cargo builds a dependency graph using a backtracking algorithm with three core operations:

1. Walk dependencies: processes deps in order; ordering influences conflict resolution.
2. Unify versions: reuses a single version across the graph whenever requirements overlap, reducing build time and keeping types compatible.

mkatychev

1. Setup openobserve

Run command below to get an openobserve executable in the current directory:

curl -L -o openobserve-ee-v0.40.4-darwin-arm64.tar.gz https://downloads.openobserve.ai/releases/o2-enterprise/v0.40.4/openobserve-ee-v0.40.4-darwin-arm64.tar.gz
tar -zxvf openobserve-ee-v0.40.4-darwin-arm64.tar.gz
with-env { ZO_ROOT_USER_EMAIL: "root@example.com", ZO_ROOT_USER_PASSWORD: "Complexpass#123" } { ./openobserve }

In browser:

mkatychev

def fill-env-var [] {
    let current_prompt = (commandline)
    let var_idx = $current_prompt | str index-of "$env." --end
    let head = match $var_idx {
        # no '$env.' was found
        -1 => return
        0 => ""
        $idx => ($current_prompt | str substring ..($idx - 1))
    }
    # 5 is the offset for f in '$env.foo`

mkatychev

def git-icon [
    colour # ansi colour argument
    one # icon for a match quantity of one
    many # icon for a match quantity of two or more
]: int -> oneof<string, nothing> {
    let icon = match $in {
        1 => $one
        2.. => $many
        _ => (return null)
    }

mkatychev

def is-help []: list<any> -> bool {
  ('-h' in $in) or ('--help' in $in)
}

export def fd --wrapped [...$args]: nothing -> oneof<list<string>, nothing> {
  if ($args | is-help) {
    return (^fd ...$args)
  }
  ^fd ...$args | lines
}

mkatychev

def hmode [] {
  let entry = pmget | where setting == "hibernatemode"
  let name = match ($entry.mode.0 | into int) {
    3 => "off"
    25 => "on"
    0 => "hard"
    $n => $n
  }
  {hibernate: $name }
}

mkatychev

---cargo
[dependencies]
tree-sitter-wit = { git = "https://github.com/bytecodealliance/tree-sitter-wit", version = "1.2.0" }
tree-sitter = "0.25.10"
---

use tree_sitter::{Parser, Point, Query, QueryCursor, StreamingIterator};

const WIT_FILE: &str = "
/// DOC COMMENT `wasmcloud`

mkatychev

Telemetry

What is OpenTelemetry?

OpenTracing   == traces            ( jaeger/tokio-tracing )
OpenCensus    == metrics           ( grafana/prometheus   )
OpenTelemetry == traces && metrics ( et al.               )

mkatychev

local read_buf = function(bufnr)
  local bufin = table.concat(vim.api.nvim_buf_get_lines(bufnr, 0, -1, true), "\n")
  if vim.api.nvim_get_option_value("eol", { buf = bufnr }) then bufin = bufin .. "\n" end
  return bufin
end

local format_buf = function(fmt_cmd)
  -- exit early if buffer is not writeable
  if vim.bo.modifiable == false or vim.bo.readonly == true then return end
  -- save cursor position

mkatychev

$fn = 48;

function line(point1, point2, width = 1) =

let(angle = 90 - atan((point2[1] - point1[1]) / (point2[0] - point1[0])))

let(offset_x = 0.5 * width * cos(angle), offset_y = 0.5 * width * sin(angle))

let(offset1 = [-offset_x, offset_y], offset2 = [offset_x, -offset_y])