more async refactor (#587)

1 files changed, 44 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/core/managers/std/init.lua b/lua/nvim-lsp-installer/core/managers/std/init.lua
new file mode 100644
index 00000000..49a7f53d
--- /dev/null
+++ b/lua/nvim-lsp-installer/core/managers/std/init.lua
@@ -0,0 +1,44 @@
+local a = require "nvim-lsp-installer.core.async"
+local installer = require "nvim-lsp-installer.core.installer"
+
+local M = {}
+
+local function with_system_executable_receipt(executable)
+    return function()
+        local ctx = installer.context()
+        ctx.receipt:with_primary_source(ctx.receipt.system(executable))
+    end
+end
+
+---@async
+---@param executable string
+---@param opts {help_url:string|nil}
+function M.system_executable(executable, opts)
+    return function()
+        M.ensure_executable(executable, opts).with_receipt()
+    end
+end
+
+---@async
+---@param executable string
+---@param opts {help_url:string|nil}
+function M.ensure_executable(executable, opts)
+    local ctx = installer.context()
+    opts = opts or {}
+    if vim.in_fast_event() then
+        a.scheduler()
+    end
+    if vim.fn.executable(executable) ~= 1 then
+        ctx.stdio_sink.stderr(("%s was not found in path.\n"):format(executable))
+        if opts.help_url then
+            ctx.stdio_sink.stderr(("See %s for installation instructions.\n"):format(opts.help_url))
+        end
+        error("Installation failed: system executable was not found.", 0)
+    end
+
+    return {
+        with_receipt = with_system_executable_receipt(executable),
+    }
+end
+
+return M