refactor(git): split URI read from conditional refresh

lua/git/diff.lua

@@ -81,17 +81,13 @@ local function uri_split(opts, buf, rev)
     local object = require("git.object")
 
     if opts.rev and opts.rev:find(":", 1, true) then
-        local content = util.exec(
-            { "git", "cat-file", "-p", opts.rev },
-            { cwd = r.worktree, silent = true }
-        )
-        if not content then
+        if not r:rev_parse(opts.rev, true) then
             util.error("invalid rev: %s", opts.rev)
             return
         end
         place_pair(
             buf,
-            object.buf_for(r, Revision.parse(opts.rev), content),
+            object.buf_for(r, Revision.parse(opts.rev)),
             false,
             opts.vertical
         )
@@ -123,15 +119,11 @@ local function uri_split(opts, buf, rev)
     local m = mapping[rev.stage]
         or { Revision.new({ stage = 0, path = rev.path }), true }
     local other_rev, left = m[1], m[2]
-    local content = util.exec(
-        { "git", "cat-file", "-p", other_rev:format() },
-        { cwd = r.worktree, silent = true }
-    )
-    if not content then
+    if not r:rev_parse(other_rev:format(), true) then
         util.error("invalid rev: %s", other_rev:format())
         return
     end
-    place_pair(buf, object.buf_for(r, other_rev, content), left, opts.vertical)
+    place_pair(buf, object.buf_for(r, other_rev), left, opts.vertical)
 end
 
 ---@class ow.Git.Diff.SplitOpts
@@ -172,15 +164,11 @@ function M.split(opts)
     else
         rev = Revision.new({ base = opts.rev, path = rel })
     end
-    local content = util.exec(
-        { "git", "cat-file", "-p", rev:format() },
-        { cwd = r.worktree, silent = true }
-    )
-    if not content then
+    if not r:rev_parse(rev:format(), true) then
         util.error("invalid rev: %s", rev:format())
         return
     end
-    local buf = require("git.object").buf_for(r, rev, content)
+    local buf = require("git.object").buf_for(r, rev)
     place_pair(buf, cur_buf, true, opts.vertical)
 end