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local _ = require "mason-core.functional"
local M = {}
local uname = vim.loop.os_uname()
---@alias Platform
---| '"win"'
---| '"unix"'
---| '"linux"'
---| '"mac"'
local arch_aliases = {
["x86_64"] = "x64",
["i386"] = "x86",
["i686"] = "x86", -- x86 compat
["aarch64"] = "arm64",
["aarch64_be"] = "arm64",
["armv8b"] = "arm64", -- arm64 compat
["armv8l"] = "arm64", -- arm64 compat
}
M.arch = arch_aliases[uname.machine] or uname.machine
M.sysname = uname.sysname
M.is_headless = #vim.api.nvim_list_uis() == 0
-- @return string @The libc found on the system, musl or glibc (glibc if ldd is not found)
local get_libc = _.lazy(function()
local _, _, libc_exit_code = os.execute "ldd --version 2>&1 | grep -q musl"
if libc_exit_code == 0 then
return "musl"
else
return "glibc"
end
end)
-- Most of the code that calls into these functions executes outside of the main event loop, where API/fn functions are
-- disabled. We evaluate these immediately here to avoid issues with main loop synchronization.
local cached_features = {
["win"] = vim.fn.has "win32",
["win32"] = vim.fn.has "win32",
["win64"] = vim.fn.has "win64",
["mac"] = vim.fn.has "mac",
["unix"] = vim.fn.has "unix",
["linux"] = vim.fn.has "linux",
}
---@type fun(env: string): boolean
local check_env = _.memoize(_.cond {
{
_.equals "musl",
function()
return get_libc() == "musl"
end,
},
{
_.equals "gnu",
function()
return get_libc() == "glibc"
end,
},
{ _.equals "openbsd", _.always(uname.sysname == "OpenBSD") },
{ _.T, _.F },
})
---Table that allows for checking whether the provided targets apply to the current system.
---Each key is a target tuple consisting of at most 3 targets, in the following order:
--- 1) OS (e.g. linux, unix, mac, win) - Mandatory
--- 2) Architecture (e.g. arm64, x64) - Optional
--- 3) Environment (e.g. gnu, musl, openbsd) - Optional
---Each target is separated by a "_" character, like so: "linux_x64_musl".
---@type table<string, boolean>
M.is = setmetatable({}, {
__index = function(__, key)
local os, arch, env = unpack(vim.split(key, "_", { plain = true }))
if not cached_features[os] or cached_features[os] ~= 1 then
return false
end
if arch and arch ~= M.arch then
return false
end
if env and not check_env(env) then
return false
end
return true
end,
})
---@generic T
---@param platform_table table<Platform, T>
---@return T
local function get_by_platform(platform_table)
if M.is.mac then
return platform_table.mac or platform_table.unix
elseif M.is.linux then
return platform_table.linux or platform_table.unix
elseif M.is.unix then
return platform_table.unix
elseif M.is.win then
return platform_table.win
else
return nil
end
end
function M.when(cases)
local case = get_by_platform(cases)
if case then
return case()
else
error "Current platform is not supported."
end
end
---@type async fun(): table
M.os_distribution = _.lazy(function()
local Result = require "mason-core.result"
---Parses the provided contents of an /etc/\*-release file and identifies the Linux distribution.
---@param contents string The contents of a /etc/\*-release file.
---@return table<string, any>
local function parse_linux_dist(contents)
local lines = vim.split(contents, "\n")
local entries = {}
for i = 1, #lines do
local line = lines[i]
local index = line:find "="
if index then
local key = line:sub(1, index - 1)
local value = line:sub(index + 1)
entries[key] = value
end
end
if entries.ID == "ubuntu" then
-- Parses the Ubuntu OS VERSION_ID into their version components, e.g. "18.04" -> {major=18, minor=04}
local version_id = entries.VERSION_ID:gsub([["]], "")
local version_parts = vim.split(version_id, "%.")
local major = tonumber(version_parts[1])
local minor = tonumber(version_parts[2])
return {
id = "ubuntu",
version_id = version_id,
version = { major = major, minor = minor },
}
elseif entries.ID == '"centos"' then
-- Parses the CentOS VERSION_ID into a major version (the only thing available).
local version_id = entries.VERSION_ID:gsub([["]], "")
local major = tonumber(version_id)
return {
id = "centos",
version_id = version_id,
version = { major = major },
}
else
return {
id = "linux-generic",
version = {},
}
end
end
return M.when {
linux = function()
local spawn = require "mason-core.spawn"
return spawn
.bash({ "-c", "cat /etc/*-release" })
:map_catching(function(result)
return parse_linux_dist(result.stdout)
end)
:recover(function()
return { id = "linux-generic", version = {} }
end)
:get_or_throw()
end,
mac = function()
return Result.success { id = "macOS" }
end,
win = function()
return Result.success { id = "windows" }
end,
}
end)
---@type async fun(): Result<string>
M.get_homebrew_prefix = _.lazy(function()
assert(M.is.mac, "Can only locate Homebrew installation on Mac systems.")
local spawn = require "mason-core.spawn"
return spawn
.brew({ "--prefix" })
:map_catching(function(result)
return vim.trim(result.stdout)
end)
:map_err(function()
return "Failed to locate Homebrew installation."
end)
end)
---@async
function M.get_node_version()
local spawn = require "mason-core.spawn"
return spawn.node({ "--version" }):map(function(result)
-- Parses output such as "v16.3.1" into major, minor, patch
local _, _, major, minor, patch = _.head(_.split("\n", result.stdout)):find "v(%d+)%.(%d+)%.(%d+)"
return { major = tonumber(major), minor = tonumber(minor), patch = tonumber(patch) }
end)
end
-- PATH separator
M.path_sep = M.is.win and ";" or ":"
return M
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