Merge fails when some plugins has same filename with read only

[kuuote]

Problems summary

Merge fails when some plugins has same filename with read only. For example, git objects are read only.

Expected

Ignoring error and merge successful

Environment Information

• dpp.vim version (SHA1): f983e0946c8b6825a0bc1f43be26e5d81efe0a4b

• denops.vim version (SHA1): https://github.com/vim-denops/denops.vim/commit/68f607d93a9758d15c0d63d3268aa420ddd29edd

• deno version(deno -V output): deno 1.37.1

• OS: Arch Linux

• neovim/Vim :version output: NVIM v0.10.0-dev-1301+g30d311ebc-dirty

Provide a minimal init.vim/vimrc without plugin managers (Required!)

let $DIR = expand('<sfile>:p:h')

let $A = expand('$DIR/a')
let $B = expand('$DIR/b')

call delete($A, 'rf')
call system('git init $A ; cd $A ; echo hoge > hoge ; git add hoge')
call delete($B, 'rf')
call system('git init $B ; cd $B ; echo hoge > hoge ; git add hoge')

let s:dpp_base = expand('$DIR/dpp')
call delete(s:dpp_base, 'rf')

set rtp+=/data/vim/repos/github.com/Shougo/dpp.vim
set rtp+=/data/vim/repos/github.com/vim-denops/denops.vim

call dpp#make_state(s:dpp_base, expand('$DIR/dpp.ts'))

import { BaseConfig } from "https://deno.land/x/dpp_vim@v0.0.3/types.ts";

export class Config extends BaseConfig {
  override config() {
    return {
      plugins: [{
        name: "a",
        path: Deno.env.get("A")!,
      }, {
        name: "b",
        path: Deno.env.get("B")!,
      }],
    };
  }
}

How to reproduce the problem from neovim/Vim startup (Required!)

1. nvim -u init.vim
2. Display following error

[denops] Failed to handle message 2,invoke,dispatch,dpp,makeState,/data/today/2023-10-17/dpp,/data/today/2023-10-17/dpp.ts,nvim PermissionDenied: Permission denied (os error 13): copy '/data/today/2023-10-17/b/.git/objects/22/62de0c121f22df8e78f5a37d6e114fd322c0b0' -> '/data/today/2023-10-17/dpp/nvim/.dpp/.git/objects/22/62de0c121f22df8e78f5a37d6e114fd322c0b0'
[denops]     at async Object.copyFile (ext:deno_fs/30_fs.js:82:3)
[denops]     at async copyFile (https://deno.land/std@0.204.0/fs/copy.ts:95:3)
[denops]     at async Promise.all (index 0)
[denops]     at async copyDir (https://deno.land/std@0.204.0/fs/copy.ts:207:3)
[denops]     at async Promise.all (index 2)
[denops]     at async copyDir (https://deno.land/std@0.204.0/fs/copy.ts:207:3)
[denops]     at async Promise.all (index 7)
[denops]     at async copyDir (https://deno.land/std@0.204.0/fs/copy.ts:207:3)
[denops]     at async copy (https://deno.land/std@0.204.0/fs/copy.ts:288:5)
[denops]     at async Dpp.mergePlugins (file:///data/vim/repos/github.com/Shougo/dpp.vim/denops/dpp/dpp.ts:306:9)

[Shougo]

I will check it later.

[Shougo]

@kuuote Please upload dpp.ts file.

[kuuote]

Sorry. uploaded now.

[Shougo]

I have implemented Ignore ".git" directory.