package_managers: gomod: Bump the max supported version of Go to 1.22

This commit introduces just preliminary support of 1.22, i.e. without
vendored workspaces support. That work is planned in the future but
requires more changes and considerations with regards to the vendored
workspaces.

Signed-off-by: Erik Skultety <[email protected]>

cachi2/core/package_managers/gomod.py

@@ -35,7 +35,13 @@
     from typing_extensions import Self
 
 from cachi2.core.config import get_config
-from cachi2.core.errors import FetchError, PackageManagerError, PackageRejected, UnexpectedFormat
+from cachi2.core.errors import (
+    FetchError,
+    PackageManagerError,
+    PackageRejected,
+    UnexpectedFormat,
+    UnsupportedFeature,
+)
 from cachi2.core.models.input import Request
 from cachi2.core.models.output import EnvironmentVariable, RequestOutput
 from cachi2.core.models.property_semantics import PropertySet
@@ -761,7 +767,7 @@ def _setup_go_toolchain(go_mod_file: RootedPath) -> Go:
     GO_121 = version.Version("1.21")
     go = Go()
     target_version = None
-    go_max_version = version.Version("1.21")
+    go_max_version = version.Version("1.22")
     go_base_version = go.version
     go_mod_version_msg = "go.mod reported versions: '%s'[go], '%s'[toolchain]"
 
@@ -876,6 +882,12 @@ def _resolve_gomod(
         flags, app_dir, config.gomod_strict_vendor
     )
     if should_vendor:
+        if go_work_path and go_work_path.join_within_root("vendor").path.is_dir():
+            # NOTE: the same error will be reported even for 1.21 which doesn't support workspace
+            # vendoring, but given it's an invalid configuration and that we plan full 1.22 support
+            # in the foreseeable future, a not so user friendly error should be fine
+            raise UnsupportedFeature("Go workspace vendoring is not supported")
+
         downloaded_modules = _vendor_deps(go, app_dir, can_make_changes, run_params)
     else:
         log.info("Downloading the gomod dependencies")