zx: compose installer with shell.raw (#16)

1 files changed, 28 insertions, 0 deletions

diff --git a/lua/nvim-lsp-installer/installers/init.lua b/lua/nvim-lsp-installer/installers/init.lua
new file mode 100644
index 00000000..8cc0e34c
--- /dev/null
+++ b/lua/nvim-lsp-installer/installers/init.lua
@@ -0,0 +1,28 @@
+local M = {}
+
+function M.compose(installers)
+    if #installers == 0 then
+        error("No installers to compose.")
+    end
+
+    return function (server, callback)
+        local function execute(idx)
+            installers[idx](server, function (success, result)
+                if not success then
+                    -- oh no, error. exit early
+                    callback(success, result)
+                elseif installers[idx - 1] then
+                    -- iterate
+                    execute(idx - 1)
+                else
+                    -- we done
+                    callback(success, result)
+                end
+            end)
+        end
+
+        execute(#installers)
+    end
+end
+
+return M