pmb.helpers.pmaports.get: deal with operators

Fix that APKBUILDs mentioning other packages with an operator could not
be found. As we are building the initial branch of v23.12, this
currently happens with postmarketos-mkinitfs: it depends on
devicepkg-utils>=0.2.0 and currently pmbootstrap will only remove the
>=0.2.0 when looking for the pkgname in the APKINDEX of binary packages
(which is why it works on master). But it does not yet do that when
looking for the pkgname in pmaports.

Move the code for stripping the operator to a common place and use it
for getting packages from pmaports too.

Change the order of operators while at it, try to find <= before =, as
otherwise it would cut off example<=1.2.3 as "example<" instead of
"example".

Reviewed-by: Caleb Connolly <kc@postmarketos.org> (via chat)

pmb/helpers/package.py

@@ -12,6 +12,14 @@ import pmb.helpers.pmaports
 import pmb.helpers.repo
 
 
+def remove_operators(package):
+    for operator in [">", ">=", "<=", "=", "<", "~"]:
+        if operator in package:
+            package = package.split(operator)[0]
+            break
+    return package
+
+
 def get(args, pkgname, arch, replace_subpkgnames=False, must_exist=True):
     """ Find a package in pmaports, and as fallback in the APKINDEXes of the
         binary packages.

pmb/helpers/pmaports.py

@@ -204,6 +204,7 @@ def get(args, pkgname, must_exist=True, subpackages=True):
                     "options": [],
                     ... }
     """
+    pkgname = pmb.helpers.package.remove_operators(pkgname)
     if subpackages:
         aport = find(args, pkgname, must_exist)
         if aport:

pmb/parse/apkindex.py

@@ -5,6 +5,7 @@ import logging
 import os
 import tarfile
 import pmb.chroot.apk
+import pmb.helpers.package
 import pmb.helpers.repo
 import pmb.parse.version
 
@@ -283,10 +284,7 @@ def providers(args, package, arch=None, must_exist=True, indexes=None):
         arch = arch or pmb.config.arch_native
         indexes = pmb.helpers.repo.apkindex_files(args, arch)
 
-    for operator in [">", ">=", "=", "<=", "<", "~"]:
-        if operator in package:
-            package = package.split(operator)[0]
-            break
+    package = pmb.helpers.package.remove_operators(package)
 
     ret = collections.OrderedDict()
     for path in indexes: