From f9299bb59c9e42d59fc57ed034fb84bdd23bbd77 Mon Sep 17 00:00:00 2001
From: William Boman <william@redwill.se>
Date: Sat, 5 Mar 2022 22:42:25 +0100
Subject: feat(ui): display installed server version (#520)

---
 lua/nvim-lsp-installer/core/async/spawn.lua | 36 +++++++++++++++++++++
 lua/nvim-lsp-installer/core/result.lua      | 49 +++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 lua/nvim-lsp-installer/core/async/spawn.lua
 create mode 100644 lua/nvim-lsp-installer/core/result.lua

(limited to 'lua/nvim-lsp-installer/core')

diff --git a/lua/nvim-lsp-installer/core/async/spawn.lua b/lua/nvim-lsp-installer/core/async/spawn.lua
new file mode 100644
index 00000000..e643f098
--- /dev/null
+++ b/lua/nvim-lsp-installer/core/async/spawn.lua
@@ -0,0 +1,36 @@
+local a = require "nvim-lsp-installer.core.async"
+local process = require "nvim-lsp-installer.process"
+local platform = require "nvim-lsp-installer.platform"
+
+local async_spawn = a.promisify(process.spawn)
+
+local spawn = {
+    aliases = {
+        npm = platform.is_win and "npm.cmd" or "npm",
+    },
+}
+
+setmetatable(spawn, {
+    __index = function(self, k)
+        return function(args)
+            local stdio = process.in_memory_sink()
+            local cmd_args = {}
+            for i, arg in ipairs(args) do
+                cmd_args[i] = arg
+            end
+            ---@type JobSpawnOpts
+            local spawn_args = {
+                stdio_sink = stdio.sink,
+                cwd = args.cwd,
+                env = args.env,
+                args = cmd_args,
+            }
+            local cmd = self.aliases[k] or k
+            local _, exit_code = async_spawn(cmd, spawn_args)
+            assert(exit_code == 0, ("%q exited with an error code: %d."):format(cmd, exit_code))
+            return table.concat(stdio.buffers.stdout, ""), table.concat(stdio.buffers.stderr, "")
+        end
+    end,
+})
+
+return spawn
diff --git a/lua/nvim-lsp-installer/core/result.lua b/lua/nvim-lsp-installer/core/result.lua
new file mode 100644
index 00000000..33623c66
--- /dev/null
+++ b/lua/nvim-lsp-installer/core/result.lua
@@ -0,0 +1,49 @@
+---@class Failure
+---@field error any
+local Failure = {}
+Failure.__index = Failure
+
+function Failure.new(error)
+    return setmetatable({ error = error }, Failure)
+end
+
+---@class Result
+---@field value any
+local Result = {}
+Result.__index = Result
+
+function Result.new(value)
+    return setmetatable({
+        value = value,
+    }, Result)
+end
+
+function Result.success(value)
+    return Result.new(value)
+end
+
+function Result.failure(error)
+    return Result.new(Failure.new(error))
+end
+
+function Result:get_or_nil()
+    if self:is_success() then
+        return self.value
+    end
+end
+
+function Result:err_or_nil()
+    if self:is_failure() then
+        return self.value.error
+    end
+end
+
+function Result:is_failure()
+    return getmetatable(self.value) == Failure
+end
+
+function Result:is_success()
+    return getmetatable(self.value) ~= Failure
+end
+
+return Result
-- 
cgit v1.2.3-70-g09d2