Add multicolumn plugin to show max line length

nvim/dot-config/nvim/lazy-lock.json

@@ -22,6 +22,7 @@
   "mason-lspconfig.nvim": { "branch": "main", "commit": "a676ab7282da8d651e175118bcf54483ca11e46d" },
   "mason-tool-installer.nvim": { "branch": "main", "commit": "443f1ef8b5e6bf47045cb2217b6f748a223cf7dc" },
   "mason.nvim": { "branch": "main", "commit": "44d1e90e1f66e077268191e3ee9d2ac97cc18e65" },
+  "multicolumn.nvim": { "branch": "master", "commit": "a363bdfd422abf26256f343dac4df183031f8e94" },
   "neo-tree.nvim": { "branch": "v3.x", "commit": "9d6826582a3e8c84787bd7355df22a2812a1ad59" },
   "nui.nvim": { "branch": "main", "commit": "de740991c12411b663994b2860f1a4fd0937c130" },
   "nvim-colorizer.lua": { "branch": "master", "commit": "ef211089af881bea206c7aa3f2693a81feee7e90" },

nvim/dot-config/nvim/lua/plugins/multicolumn.lua

@@ -0,0 +1,41 @@
+-- https://github.com/aznhe21/fmbarina/multicolumn.nvim
+local function enforced(rulers, scope)
+	return {
+		rulers = rulers,
+		scope = scope or "window",
+		full_column = false,
+		to_line_end = true,
+		bg_color = "#691b1b",
+		fg_color = "#ffd8ad",
+	}
+end
+
+--- @module "lazy"
+--- @type LazySpec
+return {
+	"fmbarina/multicolumn.nvim",
+	event = { "BufReadPre", "BufNewFile" },
+	opts = {
+		base_set = {
+			full_column = true,
+		},
+		sets = {
+			python = enforced({ 89 }),
+			rust = enforced({ 101 }),
+			gitcommit = function(_, win)
+				local T = function(c, x, y)
+					if c then
+						return x
+					else
+						return y
+					end
+				end
+
+				return enforced(
+					{ T(vim.fn.line(".", win) == 1, 51, 73) },
+					T(vim.fn.line(".", win) == 1, "line", "window")
+				)
+			end,
+		},
+	},
+}