Archive build logs as lightweight evidence

tools/runner.py

@@ -14,6 +14,7 @@ from artifacts import inspect_elf, inspect_apk
 from resource_staging import stage_runtime_resources
 
 IMAGE_TAG='kambi/castle-engine-cloud-builds-tools:cge-unstable'
+BUILD_EVIDENCE_DIR=ROOT/'build-evidence'
 def cge_command(cpu:str,action:str)->list[str]:
     if cpu not in CPUS:raise ProbeError('Unsupported Android CPU')
     if action not in ('compile','package'):raise ProbeError('Not an Android build action')
@@ -62,6 +63,15 @@ def _record(build_id:str, cpu:str, status:str, application:dict|None=None,
             'package':package or {'status':'NOT_RUN','exit_code':None},
             'package_metadata':package_metadata,'error':error}
 
+def _publish_build_evidence(record:dict)->None:
+    source=ROOT/'build'/record['build_id']/'logs'
+    destination=BUILD_EVIDENCE_DIR/record['build_id']/'logs'
+    destination.mkdir(parents=True,exist_ok=True)
+    if source.is_dir():
+        for path in source.iterdir():
+            if path.is_file():shutil.copy2(path,destination/path.name)
+    write_json(destination.parent/'build.json',record)
+
 def _finish(record:dict)->int:
     if record['status']!='PASS':
         CURRENT_OUTPUT_DIR.mkdir(parents=True,exist_ok=True)
@@ -69,6 +79,7 @@ def _finish(record:dict)->int:
             path.unlink(missing_ok=True)
         record['package_metadata']=None
     write_json(CURRENT_BUILD_METADATA,record)
+    _publish_build_evidence(record)
     return {'PASS':0,'FAIL':1,'BLOCKED':2}[record['status']]
 
 def _valid_docker_handoff(record:object,build_id:str,code:int)->bool: