component/yarn: add yarn 4.6.0

component/yarn/buildout.cfg

@@ -62,3 +62,30 @@ md5sum = db82fa09c996e9318f2f1d2ab99228f9
 <= yarn-download
 version = 1.16.0
 md5sum = 46790033c23803387890f545e4040690
+
+[yarn-berry-install]
+recipe = slapos.recipe.build
+shared = true
+url = https://github.com/yarnpkg/berry/archive/refs/tags/@yarnpkg/cli/${:version}.tar.gz
+content =
+  #!/bin/sh
+  PATH=${nodejs:location}/bin/:$PATH
+  exec %(location)s/scripts/bin/yarn $@
+install =
+  import os
+  import subprocess
+  self.copyTree(guessworkdir(self.extract(self.download())), location)
+  bin = os.path.join(location, 'bin')
+  os.makedirs(bin)
+  yarn = os.path.join(bin, 'yarn')
+  with open(yarn, 'w') as f:
+    os.fchmod(f.fileno(), 0o755)
+    f.write(options['content'] % options)
+  # run a yarn command so that it finishes initialization before the installation directory
+  # is made read only.
+  subprocess.check_output([yarn, 'cache', 'clean'])
+
+[yarn-4.6.0]
+<= yarn-berry-install
+version = 4.6.0
+md5sum = aa26ce25aa0f214c75e2362a06e1cab0