aportgen: don't fail if binary ver < APKBUILD ver

The typical workflow for upgrading cross/gcc-* is:

$ cd pmaports/cross
$ pmbootstrap aportgen gcc-*

Currently this is failing because the APKBUILD has been updated in
Alpine for gcc, but gcc has not been built for all arches yet. This
shouldn't prevent us from generating the proper updated APKBUILDs in
pmaports so just print a note and don't fail here.

I'm committing this directly to master as this currently breaks
test/test_aportgen.py::test_aportgen.

pmb/aportgen/core.py

@@ -205,16 +205,18 @@ def get_upstream_aport(args, pkgname, arch=None):
     if compare == 0:
         return aport_path
 
-    # Different version message
-    logging.error("ERROR: Package '" + pkgname + "' has a different version in"
+    # APKBUILD > binary: this is fine
+    if compare == 1:
+        logging.info(f"NOTE: {pkgname} {arch} binary package has a lower"
+                     f" version {package['version']} than the APKBUILD"
+                     f" {apkbuild_version}")
+        return aport_path
+
+    # APKBUILD < binary: aports.git is outdated
+    logging.error("ERROR: Package '" + pkgname + "' has a lower version in"
                   " local checkout of Alpine's aports (" + apkbuild_version +
                   ") compared to Alpine's binary package (" +
                   package["version"] + ")!")
 
-    # APKBUILD < binary
-    if compare == -1:
-        raise RuntimeError("You can update your local checkout with: "
-                           "'pmbootstrap pull'")
-    # APKBUILD > binary
-    raise RuntimeError("You can force an update of your binary package"
-                       " APKINDEX files with: 'pmbootstrap update'")
+    raise RuntimeError("You can update your local checkout with: "
+                       "'pmbootstrap pull'")

test/test_aportgen.py

@@ -127,6 +127,4 @@ def test_aportgen_get_upstream_aport(args, monkeypatch):
     # APKBUILD > binary
     apkbuild = {"pkgver": "3.0", "pkgrel": "0"}
     package = {"version": "2.0-r0"}
-    with pytest.raises(RuntimeError) as e:
-        func(args, upstream)
-    assert str(e.value).startswith("You can force an update of your binary")
+    assert func(args, upstream) == upstream_full