feat(git): case-insensitive status lookup on ignorecase repos

lua/git/core/repo.lua

@@ -108,6 +108,9 @@ local INVALIDATION_RULES = {
     stash_refs = function(relpath)
         return relpath == "refs/stash" or relpath == "logs/refs/stash"
     end,
+    config = function(relpath)
+        return relpath == "config"
+    end,
 }
 
 ---@param relpath string
@@ -599,6 +602,37 @@ function Repo:resolve_sha(abbrev)
     return result[1], result[2]
 end
 
+---@private
+---@return table<string, table<string, string>>
+function Repo:_config()
+    return self:get_cached("config", function(self)
+        return read_git_config(vim.fs.joinpath(self.gitdir, "config")) or {}
+    end)
+end
+
+---@private
+---@return boolean
+function Repo:_ignorecase()
+    local cfg = self:_config()
+    return cfg.core and cfg.core.ignorecase == "true" or false
+end
+
+---@param rel string
+---@return ow.Git.Status.Entry?
+function Repo:status_entry_for(rel)
+    local direct = self.status.entries[rel]
+    if direct or not self:_ignorecase() then
+        return direct
+    end
+    local lower = rel:lower()
+    for path, entry in pairs(self.status.entries) do
+        if path:lower() == lower then
+            return entry
+        end
+    end
+    return nil
+end
+
 ---@type table<string, true>
 local no_repo_dirs = {}