Move to a profile-based configuration where common

This patch makes it so common configuration is now located in shared/
and each host basically just becomes a bunch of import statements.

The exception here is host-specific configuration like the `*.linus.onl`
that live inside `hosts/ahmed/`.

Specifically I have:

- moved common configuration `shared/{nixos,home-manager,nix-darwin}`.
- moved `hosts/common.nix` to `shared/nixos/common-{nix,shell}-settings.nix`.
- split `hosts/muhammed/{dev-utils,neovim}` into per-language
  configuration.

This patch was done in preparation for the arrival of a new host, which
will need to share a lot of configuration with Muhammed.

1 files changed, 59 insertions, 0 deletions

diff --git a/shared/home-manager/neovim/lsp.nix b/shared/home-manager/neovim/lsp.nix
new file mode 100644
index 0000000..bc10487
--- /dev/null
+++ b/shared/home-manager/neovim/lsp.nix
@@ -0,0 +1,59 @@
+# Installs and configures lspconfig. The actual LSPs are added in the per-language profiles.
+{pkgs, ...}: {
+  programs.neovim.plugins = [
+    {
+      plugin = pkgs.vimPlugins.nvim-lspconfig;
+      type = "lua";
+      config = ''
+        local lspconfig = require("lspconfig")
+        local util = require("lspconfig.util")
+
+        -- Mappings.
+        -- See `:help vim.diagnostic.*` for documentation on any of the below functions
+        local opts = { noremap=true, silent=true }
+        vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, opts)
+        vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
+        vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
+        vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, opts)
+
+        -- Use an on_attach function to only map the following keys
+        -- after the language server attaches to the current buffer
+        vim.api.nvim_create_autocmd("LspAttach", {
+          callback = function(args)
+            local bufnr = args.buf
+            local client = vim.lsp.get_client_by_id(args.data.client_id)
+
+            -- Enable completion triggered by <c-x><c-o>
+            if client.server_capabilities.completionProvider then
+              vim.bo[bufnr].omnifunc = "v:lua.vim.lsp.omnifunc"
+            end
+
+            -- XXX: What does this do?
+            if client.server_capabilities.definitionProvider then
+              vim.bo[bufnr].tagfunc = "v:lua.vim.lsp.tagfunc"
+            end
+
+            -- Mappings.
+            -- See `:help vim.lsp.*` for documentation on any of the below functions
+            local bufopts = { noremap=true, silent=true, buffer=bufnr }
+            vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
+            vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
+            vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
+            vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
+            vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
+            vim.keymap.set('n', '<leader>wa', vim.lsp.buf.add_workspace_folder, bufopts)
+            vim.keymap.set('n', '<leader>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
+            vim.keymap.set('n', '<leader>wl', function()
+              print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+            end, bufopts)
+            vim.keymap.set('n', '<leader>D', vim.lsp.buf.type_definition, bufopts)
+            vim.keymap.set('n', '<leader>rn', vim.lsp.buf.rename, bufopts)
+            vim.keymap.set('n', '<leader>ca', vim.lsp.buf.code_action, bufopts)
+            vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
+            vim.keymap.set('n', '<leader>f', function() vim.lsp.buf.format { async = true } end, bufopts)
+          end,
+        })
+      '';
+    }
+  ];
+}