fix(spawn): recursively parse arglist (#610)

2 files changed, 13 insertions, 7 deletions

diff --git a/lua/nvim-lsp-installer/core/spawn.lua b/lua/nvim-lsp-installer/core/spawn.lua
index 8ac06aa4..355df029 100644
--- a/lua/nvim-lsp-installer/core/spawn.lua
+++ b/lua/nvim-lsp-installer/core/spawn.lua
@@ -33,18 +33,23 @@ local function Failure(err, cmd)
     }))
 end
 
+local function parse_args(args, dest)
+    for _, arg in ipairs(args) do
+        if type(arg) == "table" then
+            parse_args(arg, dest)
+        elseif arg ~= vim.NIL then
+            dest[#dest + 1] = arg
+        end
+    end
+    return dest
+end
+
 setmetatable(spawn, {
     __index = function(self, k)
         ---@param args string|nil|string[][]
         return function(args)
             local cmd_args = {}
-            for _, arg in ipairs(args) do
-                if type(arg) == "table" then
-                    vim.list_extend(cmd_args, arg)
-                elseif arg ~= vim.NIL then
-                    cmd_args[#cmd_args + 1] = arg
-                end
-            end
+            parse_args(args, cmd_args)
             ---@type JobSpawnOpts
             local spawn_args = {
                 stdio_sink = args.stdio_sink,
diff --git a/tests/core/spawn_spec.lua b/tests/core/spawn_spec.lua
index 7c0a27f8..be23a4ff 100644
--- a/tests/core/spawn_spec.lua
+++ b/tests/core/spawn_spec.lua
@@ -56,6 +56,7 @@ describe("async spawn", function()
                 spawn._when(true, "-c"),
                 spawn._when(false, "shouldnotbeincluded"),
                 vim.NIL,
+                { vim.NIL, vim.NIL },
                 'echo "Hello $VAR"',
                 env = { "VAR=world" },
             }