Add pre 0.6 support for null-ls

neovim/lua/plugins.lua

@@ -16,15 +16,17 @@ local function config_dark_notify()
     })
 end
 
--- Pin version dependent packages
+-- Pin version dependent packages due to unstable APIs
 local pinned_commits = {}
 if vim.fn.has("nvim-0.6.0") ~= 1 then
     if vim.fn.has("nvim-0.5.1") == 1 then
         -- Last commit compatible with 0.5.1
         pinned_commits["telescope"] = "80cdb00b221f69348afc4fb4b701f51eb8dd3120"
+        pinned_commits["null-ls"] = "739a98c12bedaa2430c4a3c08d1d22ad6c16513e"
     elseif vim.fn.has("nvim-0.5.0") == 1 then
-        -- Last commit compatible with 0.5.1
+        -- Last commit compatible with 0.5.0
         pinned_commits["telescope"] = "587a10d1494d8ffa1229246228f0655db2f0a48a"
+        pinned_commits["null-ls"] = "3e7390735501d0507bf2c2b5c2e7a16f58deeb81"
     end
 end
 
@@ -201,6 +203,7 @@ return require("packer").startup({
         -- Generic linter/formatters in diagnostics API
         use({
             "jose-elias-alvarez/null-ls.nvim",
+            commit = pinned_commits["null-ls"],
             requires = { "nvim-lua/plenary.nvim", "neovim/nvim-lspconfig" },
         })
 

neovim/lua/plugins/lsp.lua

@@ -176,10 +176,7 @@ end
 
 function M.config_null_ls()
     utils.try_require("null-ls", function(null_ls)
-        null_ls.setup({
+        local sources = {
-            on_attach = default_attach,
-            capabilities = merged_capabilities(),
-            sources = {
             -- Generic
             -- null_ls.builtins.formatting.preittier,
             -- null_ls.builtins.formatting.trim_whitespace,
@@ -203,8 +200,23 @@ function M.config_null_ls()
             -- Lua
             null_ls.builtins.diagnostics.luacheck,
             null_ls.builtins.formatting.stylua,
-            },
+        }
+
+        -- HACK: Handle old versions of null_ls for vim < 0.6 that don't support `setup`
+        if null_ls["setup"] ~= nil then
+            null_ls.setup({
+                on_attach = default_attach,
+                capabilities = merged_capabilities(),
+                sources = sources,
             })
+        else
+            null_ls.config({
+                sources = sources,
+            })
+            require("lspconfig")["null-ls"].setup({
+                on_attach = default_attach,
+            })
+        end
     end)
 end