[webkitcorepy] Packaging requires pyparsing (Follow-up to 268523@main)

https://bugs.webkit.org/show_bug.cgi?id=262124
rdar://116062896

Reviewed by Elliott Williams.

Landed incorrect version of this change in 268523@main (5bae443),
land the correctly reviewed version.

* Tools/Scripts/libraries/webkitcorepy/webkitcorepy/autoinstall.py:
(Package.install): Install base libraries from a list instead naming them explicitly.
(AutoInstall): Centralize all libraries required by setup.py in a single list,
add pyparsing to that list.

Canonical link: https://commits.webkit.org/268542@main

Tools/Scripts/libraries/webkitcorepy/webkitcorepy/autoinstall.py

@@ -276,15 +276,10 @@ def install(self):
         if self.is_cached():
             return
 
-        # Make sure that setuptools, tomli, setuptools_scm, wheel and packaging are installed, since setup.py relies on them
-        if self.name not in ['setuptools', 'wheel', 'pyparsing', 'packaging', 'tomli', 'setuptools_scm']:
-            AutoInstall.install('setuptools')
-            AutoInstall.install('wheel')
-            AutoInstall.install('pyparsing')
-            AutoInstall.install('packaging')
-            if sys.version_info >= (3, 0):
-                AutoInstall.install('tomli')
-            AutoInstall.install('setuptools_scm')
+        # Make sure that base libraries are installed, since setup.py relies on them
+        if self.name not in AutoInstall.BASE_LIBRARIES:
+            for library in AutoInstall.BASE_LIBRARIES:
+                AutoInstall.install(library)
 
         # In some cases a package may check if another package is installed without actually
         # importing it, which would make the AutoInstall to miss the dependency as it would
@@ -434,6 +429,11 @@ class AutoInstall(object):
     DISABLE_ENV_VAR = 'DISABLE_WEBKITCOREPY_AUTOINSTALLER'
     CA_CERT_PATH_ENV_VAR = 'AUTOINSTALL_CA_CERT_PATH'
 
+    # This list of libraries is required to install other libraries, and must be installed first
+    BASE_LIBRARIES = ['setuptools', 'wheel', 'pyparsing', 'packaging', 'setuptools_scm']
+    if sys.version_info >= (3, 0):
+        BASE_LIBRARIES.insert(-1, 'tomli')
+
     directory = None
     index = _default_pypi_index()
     timeout = 30