refactor(git): unify around the Repo abstraction

lua/git/log.lua

@@ -3,8 +3,31 @@ local util = require("git.util")
 
 local M = {}
 
+M.URI_PREFIX = "gitlog://"
+
 local LOG_FORMAT = "%h %ad {%an}%d %s"
-local URI_PREFIX = "gitlog://"
+
+local cr = vim.api.nvim_replace_termcodes("<CR>", true, false, true)
+
+---@param buf integer
+local function attach_dispatch(buf)
+    vim.keymap.set("n", "<CR>", function()
+        local r = repo.find(buf)
+        -- Anchor past the leading graph chars (matches the leading sha
+        -- column, not any hex word that happens to appear later in the
+        -- subject).
+        local sha = r
+            and vim.api
+                .nvim_get_current_line()
+                :match("^[*|/\\_ ]*(%x%x%x%x%x%x%x+)")
+        if sha then
+            ---@cast r -nil
+            require("git.object").open_object(r, sha, { split = false })
+        else
+            vim.api.nvim_feedkeys(cr, "n", false)
+        end
+    end, { buffer = buf, silent = true, desc = "Open commit" })
+end
 
 ---@param worktree string
 ---@param max_count integer?
@@ -27,8 +50,12 @@ end
 
 ---@param buf integer
 local function populate(buf)
-    local worktree = vim.b[buf].git_worktree
-    local stdout = fetch(worktree, vim.b[buf].git_log_max_count)
+    local r = repo.find(buf)
+    local state = r and r:state(buf)
+    if not r or not state then
+        return
+    end
+    local stdout = fetch(r.worktree, state.log_max_count)
     if not stdout then
         return
     end
@@ -65,12 +92,16 @@ end
 ---@param buf integer
 function M.read_uri(buf)
     local name = vim.api.nvim_buf_get_name(buf)
-    local worktree = name:sub(#URI_PREFIX + 1)
+    local worktree = name:sub(#M.URI_PREFIX + 1)
     if worktree == "" then
         return
     end
+    local r = repo.resolve(worktree)
+    if not r then
+        return
+    end
+    repo.attach(buf, r)
 
-    vim.b[buf].git_worktree = worktree
     vim.bo[buf].swapfile = false
     vim.bo[buf].bufhidden = "hide"
     vim.bo[buf].buftype = "nofile"
@@ -78,6 +109,7 @@ function M.read_uri(buf)
         vim.bo[buf].filetype = "gitlog"
     end
 
+    attach_dispatch(buf)
     populate(buf)
 end
 
@@ -92,15 +124,16 @@ M.opt_parsers = {
 ---@param opts ow.Git.LogOpts?
 function M.open(opts)
     opts = opts or {}
-    local _, worktree = repo.current_repo()
-    if not worktree then
+    local r = repo.find()
+    if not r then
         util.warning("not in a git repository")
         return
     end
 
-    local buf = vim.fn.bufadd(URI_PREFIX .. worktree)
-    vim.b[buf].git_worktree = worktree
-    vim.b[buf].git_log_max_count = opts.max_count
+    local buf = vim.fn.bufadd(M.URI_PREFIX .. r.worktree)
+    repo.attach(buf, r)
+    local state = r:state(buf) --[[@as -nil]]
+    state.log_max_count = opts.max_count
     local was_loaded = vim.api.nvim_buf_is_loaded(buf)
 
     local win = vim.fn.bufwinid(buf)