plugins/copilot-lua: init + test

tests/test-sources/plugins/completion/copilot-lua.nix

@@ -0,0 +1,85 @@
+{
+  empty = {
+    plugins.copilot-lua.enable = true;
+  };
+
+  nvim-cmp = {
+    plugins = {
+      copilot-lua = {
+        enable = true;
+
+        panel.enabled = false;
+        suggestion.enabled = false;
+      };
+
+      copilot-cmp = {
+        event = ["InsertEnter" "LspAttach"];
+        fixPairs = true;
+      };
+
+      nvim-cmp = {
+        enable = true;
+        sources = [
+          {name = "copilot";}
+        ];
+      };
+    };
+  };
+
+  default = {
+    plugins.copilot-lua = {
+      enable = true;
+
+      panel = {
+        enabled = true;
+        autoRefresh = false;
+        keymap = {
+          jumpPrev = "[[";
+          jumpNext = "]]";
+          accept = "<CR>";
+          refresh = "gr";
+          open = "<M-CR>";
+        };
+        layout = {
+          position = "bottom";
+          ratio = 0.4;
+        };
+      };
+      suggestion = {
+        enabled = true;
+        autoTrigger = false;
+        debounce = 75;
+        keymap = {
+          accept = "<M-l>";
+          acceptWord = false;
+          acceptLine = false;
+          next = "<M-]>";
+          prev = "<M-[>";
+          dismiss = "<C-]>";
+        };
+      };
+      filetypes = {
+        markdown = true;
+        terraform = false;
+        sh.__raw = ''
+          function ()
+            if string.match(vim.fs.basename(vim.api.nvim_buf_get_name(0)), '^%.env.*') then
+              -- disable for .env files
+              return false
+            end
+            return true
+          end
+        '';
+      };
+      serverOptsOverrides = {
+        trace = "verbose";
+        settings = {
+          advanced = {
+            listCount = 10; # number of completions for panel
+            inlineSuggestCount = 3; # number of completions for getCompletions
+          };
+        };
+      };
+    };
+  };
+}