[CI][NFC] Refactor compute_platform_title into generate_test_report_lib

This enables reuse in other CI components, like
premerge_advisor_explain.py.

Reviewers: DavidSpickett, gburgessiv, Keenuts, dschuff, lnihlen

Reviewed By: Keenuts, DavidSpickett

Pull Request: #166604

Author: boomanaiden154

.ci/generate_test_report_github.py

@@ -4,21 +4,10 @@
 """Script to generate a build report for Github."""
 
 import argparse
-import platform
 
 import generate_test_report_lib
 
 
-def compute_platform_title() -> str:
-    logo = ":window:" if platform.system() == "Windows" else ":penguin:"
-    # On Linux the machine value is x86_64 on Windows it is AMD64.
-    if platform.machine() == "x86_64" or platform.machine() == "AMD64":
-        arch = "x64"
-    else:
-        arch = platform.machine()
-    return f"{logo} {platform.system()} {arch} Test Results"
-
-
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
     parser.add_argument("return_code", help="The build's return code.", type=int)
@@ -28,7 +17,9 @@ def compute_platform_title() -> str:
     args = parser.parse_args()
 
     report = generate_test_report_lib.generate_report_from_files(
-        compute_platform_title(), args.return_code, args.build_test_logs
+        generate_test_report_lib.compute_platform_title(),
+        args.return_code,
+        args.build_test_logs,
     )
 
     print(report)

.ci/generate_test_report_lib.py

@@ -4,6 +4,7 @@
 """Library to parse JUnit XML files and return a markdown report."""
 
 from typing import TypedDict
+import platform
 
 from junitparser import JUnitXml, Failure
 
@@ -305,3 +306,13 @@ def load_info_from_files(build_log_files):
 def generate_report_from_files(title, return_code, build_log_files):
     junit_objects, ninja_logs = load_info_from_files(build_log_files)
     return generate_report(title, return_code, junit_objects, ninja_logs)
+
+
+def compute_platform_title() -> str:
+    logo = ":window:" if platform.system() == "Windows" else ":penguin:"
+    # On Linux the machine value is x86_64 on Windows it is AMD64.
+    if platform.machine() == "x86_64" or platform.machine() == "AMD64":
+        arch = "x64"
+    else:
+        arch = platform.machine()
+    return f"{logo} {platform.system()} {arch} Test Results"