Allow the C++ toolchain config rules comparator script to not need toolchain_identifier argument when both --before and --after arguments are CToolchains (coming from Starlark rules instead of CROSSTOOL proto)
We don't need to select a toolchain by the identifier when we get the proto from Starlark rules because in that case the proto contains a single toolchain.
The difference in toolchain_identifier field between the first and the second proto file will be caught as any other field.
RELNOTES: None.
PiperOrigin-RevId: 262543753
Change-Id: I1e66ee302bf551ade883c217f6269f44382393c0
diff --git a/tools/migration/ctoolchain_comparator.py b/tools/migration/ctoolchain_comparator.py
index 2f6870b..5143e02 100644
--- a/tools/migration/ctoolchain_comparator.py
+++ b/tools/migration/ctoolchain_comparator.py
@@ -46,7 +46,6 @@
"The identifier of the CToolchain that is being compared.")
flags.mark_flag_as_required("before")
flags.mark_flag_as_required("after")
-flags.mark_flag_as_required("toolchain_identifier")
def _to_absolute_path(path):
@@ -67,7 +66,7 @@
return None
-def _read_crosstool_or_ctoolchain_proto(input_file, toolchain_identifier):
+def _read_crosstool_or_ctoolchain_proto(input_file, toolchain_identifier=None):
"""Reads a proto file and finds the CToolchain with the given identifier."""
with open(input_file, "r") as f:
text = f.read()
@@ -75,6 +74,10 @@
c_toolchain = crosstool_config_pb2.CToolchain()
try:
text_format.Merge(text, crosstool_release)
+ if toolchain_identifier is None:
+ print("CROSSTOOL proto needs a 'toolchain_identifier' specified in "
+ "order to be able to select the right toolchain for comparison.")
+ return None
toolchain = _find_toolchain(crosstool_release, toolchain_identifier)
if toolchain is None:
print(("Cannot find a CToolchain with an identifier '%s' in CROSSTOOL "
@@ -84,7 +87,8 @@
except text_format.ParseError as crosstool_error:
try:
text_format.Merge(text, c_toolchain)
- if c_toolchain.toolchain_identifier != toolchain_identifier:
+ if (toolchain_identifier is not None and
+ c_toolchain.toolchain_identifier != toolchain_identifier):
print(("Expected CToolchain with identifier '%s', got CToolchain with "
"identifier '%s'" % (toolchain_identifier,
c_toolchain.toolchain_identifier)))