Installation fails within yarn

[alainwolf]

Hello PDA folks

I use PowerDNS-Admin since probably 2016.

Upgrades where never very easy, but this time I can't get over the yarn install step no matter what I try.

(venv) user@host:~/example.net/admin/PowerDNS-Admin-git$ yarn install --pure-lockfile
yarn install v1.22.19
error An unexpected error occurred: "EISDIR: illegal operation on a directory, read".
info If you think this is a bug, please open a bug report with the information provided in "/var/www/example.net/admin/PowerDNS-Admin-git/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/install for documentation about this command.

I tried multiple times, deleting everything and re-starting from scratch.

I tried with a downloaded archive of release 0.4.1 and a current git-clone, the error remains the same.

The mentioned error-log is there, but I don't understand, which directory is causing the error.

Arguments: 
  /usr/bin/node /usr/share/yarn/bin/yarn.js install --pure-lockfile

PATH: 
  /var/www/example.net/admin/PowerDNS-Admin-git/venv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin

Yarn version: 
  1.22.19

Node version: 
  20.5.1

Platform: 
  linux x64

Trace: 
  Error: EISDIR: illegal operation on a directory, read

npm manifest: 
  {
    "dependencies": {
      "@fortawesome/fontawesome-free": "6.3.0",
      "admin-lte": "3.2.0",
      "bootstrap": "4.6.2",
      "bootstrap-datepicker": "^1.9.0",
      "bootstrap-validator": "^0.11.9",
      "datatables.net-plugins": "^1.13.1",
      "icheck": "^1.0.2",
      "jquery-slimscroll": "^1.3.8",
      "jquery-sparkline": "^2.4.0",
      "jquery-ui-dist": "^1.13.2",
      "jquery.quicksearch": "^2.4.0",
      "jquery-validation": "^1.19.5",
      "jtimeout": "^3.2.0",
      "knockout": "^3.5.1",
      "multiselect": "^0.9.12"
    },
    "resolutions": {
      "admin-lte/@fortawesome/fontawesome-free": "6.3.0"
    }
  }

yarn manifest: 
  No manifest

Lockfile: 
  # THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
  # yarn lockfile v1

Appreciate your help.

Regards
Alain

[alainwolf]

Found the problem with strace yarn -v.

There was an empty /var/www/.yarnrc directory from a previous installation.

After deleting that, the command succeeded.