New component: meson

https://mesonbuild.com/

component/meson/buildout.cfg

+[buildout]
+extends =
+  ../python3/buildout.cfg
+parts =
+  meson
+
+[meson]
+recipe = slapos.recipe.cmmi
+shared = true
+url = https://github.com/mesonbuild/meson/releases/download/${:version}/meson-${:version}.tar.gz
+version = 0.57.2
+md5sum = 4a07b6d42d7a46a6b6e9604fae7da9aa
+configure-command = true
+make-binary = true
+post-install =
+  %(python)s -m venv %(location)s
+  set %(location)s/bin/python3
+  $1 setup.py install_data install_lib
+  $1 <<EOF
+  import os, pkg_resources, sys
+  for name, ep in pkg_resources.get_entry_map(
+      'meson==%(version)s', 'console_scripts').items():
+    fd = os.open(%(location)r '/bin/' + name, os.O_WRONLY|os.O_CREAT|os.O_EXCL)
+    os.write(fd, ("""#!$1
+  import os, sys
+  from %%s import %%s
+  if __name__ == '__main__':
+    sys.exit(%%s())
+  """ %% (ep.module_name, ep.attrs[0], '.'.join(ep.attrs))).encode())
+    os.close(fd)
+  EOF
+  %(location)s/bin/pip uninstall -y pip setuptools
+python = ${python3:executable}
+
+[meson:python3]
+python = ${buildout:executable}