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|
local Result = require "mason-core.result"
local _ = require "mason-core.functional"
local a = require "mason-core.async"
local compiler = require "mason-core.installer.compiler"
local control = require "mason-core.async.control"
local fs = require "mason-core.fs"
local linker = require "mason-core.installer.linker"
local log = require "mason-core.log"
local registry = require "mason-registry"
local OneShotChannel = control.OneShotChannel
local InstallContext = require "mason-core.installer.context"
---@class InstallRunner
---@field handle InstallHandle
---@field global_semaphore Semaphore
---@field global_permit Permit?
---@field package_permit Permit?
local InstallRunner = {}
InstallRunner.__index = InstallRunner
---@param handle InstallHandle
---@param semaphore Semaphore
function InstallRunner:new(handle, semaphore)
---@type InstallRunner
local instance = {}
setmetatable(instance, self)
instance.location = location
instance.global_semaphore = semaphore
instance.handle = handle
return instance
end
---@alias InstallRunnerCallback fun(success: true, receipt: InstallReceipt) | fun(success: false, handle: InstallHandle, error: any)
---@param opts PackageInstallOpts
---@param callback? InstallRunnerCallback
function InstallRunner:execute(opts, callback)
local handle = self.handle
log.fmt_info("Executing installer for %s %s", handle.package, opts)
local context = InstallContext:new(handle, opts)
local tailed_output = {}
if opts.debug then
local function append_log(chunk)
tailed_output[#tailed_output + 1] = chunk
end
handle:on("stdout", append_log)
handle:on("stderr", append_log)
end
---@async
local function finalize_logs(success, result)
if not success then
context.stdio_sink.stderr(tostring(result))
context.stdio_sink.stderr "\n"
end
if opts.debug then
context.fs:write_file("mason-debug.log", table.concat(tailed_output, ""))
context.stdio_sink.stdout(("[debug] Installation directory retained at %q.\n"):format(context.cwd:get()))
end
end
---@async
local finalize = a.scope(function(success, result)
finalize_logs(success, result)
if not opts.debug and not success then
-- clean up installation dir
pcall(function()
fs.async.rmrf(context.cwd:get())
end)
end
if not handle:is_closing() then
handle:close()
end
self:release_lock()
self:release_permit()
if success then
log.fmt_info("Installation succeeded for %s", handle.package)
if callback then
callback(true, result.receipt)
end
handle.package:emit("install:success", result.receipt)
registry:emit("package:install:success", handle.package, result.receipt)
else
log.fmt_error("Installation failed for %s error=%s", handle.package, result)
if callback then
callback(false, result)
end
handle.package:emit("install:failed", result)
registry:emit("package:install:failed", handle.package, result)
end
end)
local cancel_execution = a.run(function()
return Result.try(function(try)
try(self.handle.location:initialize())
try(self:acquire_permit()):receive()
try(self:acquire_lock(opts.force))
context.receipt:with_start_time(vim.loop.gettimeofday())
-- 1. initialize working directory
try(context.cwd:initialize())
-- 2. run installer
---@type async fun(ctx: InstallContext): Result
local installer = try(compiler.compile_installer(handle.package.spec, opts))
try(context:execute(installer))
-- 3. promote temporary installation dir
try(Result.pcall(function()
context:promote_cwd()
end))
-- 4. link package & write receipt
try(linker.link(context):on_failure(function()
-- unlink any links that were made before failure
context:build_receipt():on_success(
---@param receipt InstallReceipt
function(receipt)
linker.unlink(handle.package, receipt, self.handle.location):on_failure(function(err)
log.error("Failed to unlink failed installation.", err)
end)
end
)
end))
---@type InstallReceipt
local receipt = try(context:build_receipt())
try(Result.pcall(fs.sync.write_file, handle.location:receipt(handle.package.name), receipt:to_json()))
return {
receipt = receipt,
}
end):get_or_throw()
end, finalize)
handle:once("terminate", function()
cancel_execution()
local function on_close()
finalize(false, "Installation was aborted.")
end
if handle:is_closed() then
on_close()
else
handle:once("closed", on_close)
end
end)
end
---@async
---@private
function InstallRunner:release_lock()
pcall(fs.async.unlink, self.handle.location:lockfile(self.handle.package.name))
end
---@async
---@param force boolean?
---@private
function InstallRunner:acquire_lock(force)
local pkg = self.handle.package
log.debug("Attempting to lock package", pkg)
local lockfile = self.handle.location:lockfile(pkg.name)
if force ~= true and fs.async.file_exists(lockfile) then
log.error("Lockfile already exists.", pkg)
return Result.failure(
("Lockfile exists, installation is already running in another process (pid: %s). Run with :MasonInstall --force to bypass."):format(
fs.async.read_file(lockfile)
)
)
end
a.scheduler()
fs.async.write_file(lockfile, vim.fn.getpid())
log.debug("Wrote lockfile", pkg)
return Result.success(lockfile)
end
---@private
function InstallRunner:acquire_permit()
local channel = OneShotChannel:new()
log.fmt_debug("Acquiring permit for %s", self.handle.package)
local handle = self.handle
if handle:is_active() or handle:is_closing() then
log.fmt_debug("Received active or closing handle %s", handle)
return Result.failure "Invalid handle state."
end
handle:queued()
a.run(function()
self.global_permit = self.global_semaphore:acquire()
self.package_permit = handle.package:acquire_permit()
end, function(success, err)
if not success or handle:is_closing() then
if not success then
log.error("Acquiring permits failed", err)
end
self:release_permit()
else
log.fmt_debug("Activating handle %s", handle)
handle:active()
channel:send()
end
end)
return Result.success(channel)
end
---@private
function InstallRunner:release_permit()
if self.global_permit then
self.global_permit:forget()
self.global_permit = nil
end
if self.package_permit then
self.package_permit:forget()
self.package_permit = nil
end
end
return InstallRunner
|
