Fix gruvbox diff colors

lua/plugins/diffview.lua

@@ -1,6 +1,7 @@
 local actions = require("diffview.actions")
 
 require("diffview").setup({
+	enhanced_diff_hl = true,
 	keymaps = {
 		view = {
 			["gq"] = "<Cmd>DiffviewClose<CR>",

lua/plugins/gruvbox.lua

@@ -1,3 +1,5 @@
+local colors = require("gruvbox.palette").colors;
+
 require("gruvbox").setup({
   undercurl = true,
   underline = true,
@@ -22,8 +24,23 @@ require("gruvbox").setup({
     dark1 = '#242424',
   },
   overrides = {
-    Pmenu = { bg = '#222222'}
+    Pmenu = { bg = '#222222'},
+    GruvboxAquaSign = { bg = "NONE" },
+    GruvboxBlueSign = { bg = "NONE" },
+    GruvboxGreenSign = { bg = "NONE" },
+    GruvboxOrangeSign = { bg = "NONE" },
+    GruvboxPurpleSign = { bg = "NONE" },
+    GruvboxRedSign = { bg = "NONE" },
+    GruvboxYellowSign = { bg = "NONE" },
+    SignColumn = { bg = "NONE" },
   }
 })
 vim.o.background = "dark"
-vim.api.nvim_command([[colorscheme gruvbox]])
+
+-- TODO: how to apply this when colorscheme changes?
+vim.api.nvim_set_hl(0, 'DiffDelete', { bg = "none", fg = colors.dark2 })
+vim.api.nvim_set_hl(0, 'DiffviewDiffDelete', { bg = "none", fg = colors.dark2 })
+vim.api.nvim_set_hl(0, 'DiffviewDiffAddAsDelete', { bg = "#370000" })
+vim.api.nvim_set_hl(0, 'DiffAdd', { bg = "#393400" }) -- #122f2f
+vim.api.nvim_set_hl(0, 'DiffChange', { bg = "#222a36" })
+vim.api.nvim_set_hl(0, 'DiffText', { bg = "#2f3f5c" }) -- #2f3f5c

lua/user/settings.lua

@@ -91,3 +91,5 @@ vim.api.nvim_create_autocmd('TextYankPost', {
 })
 
 vim.opt.fillchars:append { diff = "╱" }
+
+vim.api.nvim_command([[colorscheme gruvbox]])