From f4888d169e7d710c2ab688618761cd1dd7f2b6d7 Mon Sep 17 00:00:00 2001
From: "Casper V. Kristensen" <casper@vkristensen.dk>
Date: Sun, 18 Aug 2024 18:12:59 +0200
Subject: [PATCH] better git

---
 modules/base/git.nix |  1 +
 modules/base/vim.nix | 81 ++++++++++++++++++++++++++++++++++----------
 2 files changed, 65 insertions(+), 17 deletions(-)

diff --git a/modules/base/git.nix b/modules/base/git.nix
index 62500d1..a16c1cc 100644
--- a/modules/base/git.nix
+++ b/modules/base/git.nix
@@ -19,6 +19,7 @@
       };
 
       extraConfig = {
+        diff.algorithm = "histogram";
         diff.colorMoved = "default";
         init.defaultBranch = "master";
         pull.rebase = true;
diff --git a/modules/base/vim.nix b/modules/base/vim.nix
index 5b77fd8..6169e8e 100644
--- a/modules/base/vim.nix
+++ b/modules/base/vim.nix
@@ -74,7 +74,7 @@
           vim.opt.listchars = { tab="▸ ", trail="·", nbsp="␣" }
 
           -- Better diffs
-          vim.opt.diffopt:append({"linematch:60", "algorithm:patience"})
+          vim.opt.diffopt:append({"linematch:60", "algorithm:histogram", "indent-heuristic"})
           vim.opt.fillchars:append({ diff = "░" })
 
           -- Show search-replace preview live
@@ -636,21 +636,6 @@
             '';
         }
 
-        # Git integration for buffers.
-        # https://github.com/lewis6991/gitsigns.nvim
-        {
-          plugin = gitsigns-nvim;
-          type = "lua";
-          config =
-            /*
-            lua
-            */
-            ''
-              require("gitsigns").setup({})
-              -- TODO: keybinds
-            '';
-        }
-
         # An interactive and powerful Git interface for Neovim, inspired by
         # Magit.
         # https://github.com/NeogitOrg/neogit
@@ -662,11 +647,73 @@
             lua
             */
             ''
-              require("neogit").setup({})
+              require("neogit").setup({
+                graph_style = "unicode",
+              })
               vim.keymap.set("n", "<Leader>gg", vim.cmd.Neogit)
             '';
         }
 
+        # Git integration for buffers.
+        # https://github.com/lewis6991/gitsigns.nvim
+        {
+          plugin = gitsigns-nvim;
+          type = "lua";
+          config =
+            /*
+            lua
+            */
+            ''
+              require("gitsigns").setup({
+                -- https://github.com/lewis6991/gitsigns.nvim?tab=readme-ov-file#keymaps
+                on_attach = function(bufnr)
+                  local gitsigns = require("gitsigns")
+
+                  local function map(mode, l, r, opts)
+                    opts = opts or {}
+                    opts.buffer = bufnr
+                    vim.keymap.set(mode, l, r, opts)
+                  end
+
+                  -- Navigation
+                  map("n", "]c", function()
+                    if vim.wo.diff then
+                      vim.cmd.normal({"]c", bang = true})
+                    else
+                      gitsigns.nav_hunk("next")
+                    end
+                  end)
+
+                  map("n", "[c", function()
+                    if vim.wo.diff then
+                      vim.cmd.normal({"[c", bang = true})
+                    else
+                      gitsigns.nav_hunk("prev")
+                    end
+                  end)
+
+                  -- Actions
+                  map("n", "<leader>hs", gitsigns.stage_hunk)
+                  map("n", "<leader>hr", gitsigns.reset_hunk)
+                  map("v", "<leader>hs", function() gitsigns.stage_hunk {vim.fn.line("."), vim.fn.line("v")} end)
+                  map("v", "<leader>hr", function() gitsigns.reset_hunk {vim.fn.line("."), vim.fn.line("v")} end)
+                  map("n", "<leader>hS", gitsigns.stage_buffer)
+                  map("n", "<leader>hu", gitsigns.undo_stage_hunk)
+                  map("n", "<leader>hR", gitsigns.reset_buffer)
+                  map("n", "<leader>hp", gitsigns.preview_hunk)
+                  map("n", "<leader>hb", function() gitsigns.blame_line{full=true} end)
+                  map("n", "<leader>tb", gitsigns.toggle_current_line_blame)
+                  map("n", "<leader>hd", gitsigns.diffthis)
+                  map("n", "<leader>hD", function() gitsigns.diffthis("~") end)
+                  map("n", "<leader>td", gitsigns.toggle_deleted)
+
+                  -- Text object
+                  map({"o", "x"}, "ih", ":<C-U>Gitsigns select_hunk<CR>")
+                end
+              })
+            '';
+        }
+
         # Single tabpage interface for easily cycling through diffs for all
         # modified files for any git rev.
         # https://github.com/sindrets/diffview.nvim