feat: add icons to git_status finder (#401)

* add icons to git_status finder

* fix lint warning

* fix incorrect removed icon

* refactor, more states/icons

* refactor, widen columns to allow for 3char width icons

* attempted col width fix

* fixup: small comments

Co-authored-by: TJ DeVries <devries.timothyj@gmail.com>

lua/telescope/make_entry.lua

@@ -1019,28 +1019,51 @@ function make_entry.gen_from_autocommands(_)
   end
 end
 
+local git_icon_defaults = {
+  added     = "+",
+  changed   = "~",
+  copied    = ">",
+  deleted   = "-",
+  renamed   = "➡",
+  unmerged  = "‡",
+  untracked = "?"
+}
+
 function make_entry.gen_from_git_status(opts)
+  opts = opts or {}
+
+  local col_width = ((opts.git_icons and opts.git_icons.added) and opts.git_icons.added:len() + 2) or 2
   local displayer = entry_display.create {
-  separator = " ",
+  separator = "",
   items = {
-      { width = 1 },
-      { width = 1 },
+      { width = col_width},
+      { width = col_width},
       { remaining = true },
     }
   }
 
+  local icons = vim.tbl_extend("keep", opts.git_icons or {}, git_icon_defaults)
+
+  local git_abbrev = {
+    ["A"] = {icon = icons.added,      hl = "TelescopeResultsDiffAdd"},
+    ["U"] = {icon = icons.unmerged,   hl = "TelescopeResultsDiffAdd"},
+    ["M"] = {icon = icons.changed,    hl = "TelescopeResultsDiffChange"},
+    ["C"] = {icon = icons.copied,     hl = "TelescopeResultsDiffChange"},
+    ["R"] = {icon = icons.renamed,    hl = "TelescopeResultsDiffChange"},
+    ["D"] = {icon = icons.deleted,    hl = "TelescopeResultsDiffDelete"},
+    ["?"] = {icon = icons.untracked,  hl = "TelescopeResultsDiffUntracked"},
+  }
+
   local make_display = function(entry)
-    local modified = "TelescopeResultsDiffChange"
-    local staged = "TelescopeResultsDiffAdd"
-
-    if entry.status == "??" then
-      modified = "TelescopeResultsDiffDelete"
-      staged = "TelescopeResultsDiffDelete"
-    end
+    local x = string.sub(entry.status, 1, 1)
+    local y = string.sub(entry.status, -1)
+    local status_x = git_abbrev[x] or {}
+    local status_y = git_abbrev[y] or {}
 
+    local empty_space = (" ")
     return displayer {
-      { string.sub(entry.status, 1, 1), staged },
-      { string.sub(entry.status, -1), modified },
+      { status_x.icon or empty_space, status_x.hl},
+      { status_y.icon or empty_space, status_y.hl},
       entry.value,
     }
   end