build-generator: add option for running OFG generation (#917)

Makes it possible to run auto harness generation on generated builds as
part of the same command

```sh
MODEL=gpt-4o python3 -m experimental.build_generator.runner \
  -of oss-fuzz/ -i targets2.txt -o generated-3 --generate-harness
```

ref: #911

Signed-off-by: David Korczynski <david@adalogics.com>

Author: DavidKorczynski

experimental/build_generator/runner.py

@@ -291,6 +291,36 @@ def run_parallels(oss_fuzz_base, target_repositories, llm_model,
     proc.join()
 
 
+def run_harness_generation(out_gen):
+  """Runs harness generation based on the projects in `out`"""
+
+  projects_dir = os.path.join(out_gen, 'oss-fuzz-projects')
+  if not os.path.isdir(projects_dir):
+    logger.info('Found no projects.')
+    return
+
+  # Set up if needed
+  if not os.path.isdir('work'):
+    subprocess.check_call('./scripts/run-new-oss-fuzz-project/setup.sh',
+                          shell=True)
+
+  # Copy projects over
+  projects_to_run = []
+  for project in os.listdir(projects_dir):
+    dst = os.path.join('work', 'oss-fuzz', 'projects', project)
+    if os.path.isdir(dst):
+      shutil.rmtree(dst)
+    shutil.copytree(os.path.join(projects_dir, project),
+                    os.path.join('work', 'oss-fuzz', 'projects', project))
+    projects_to_run.append(project)
+
+  # Run project generation
+  project_string = ' '.join(projects_to_run)
+  subprocess.check_call(
+      f'./scripts/run-new-oss-fuzz-project/run-project.sh {project_string}',
+      shell=True)
+
+
 def parse_commandline():
   """Parse the commandline."""
   parser = argparse.ArgumentParser()
@@ -313,6 +343,10 @@ def parse_commandline():
       '-m',
       help=f'LLM model to use. Available: {str(constants.MODELS)}',
       type=str)
+  parser.add_argument(
+      '--generate-harness',
+      action='store_true',
+      help='Will run OFG harness creation on generated projects.')
   return parser.parse_args()
 
 
@@ -341,6 +375,9 @@ def main():
   run_parallels(os.path.abspath(args.oss_fuzz), target_repositories, args.model,
                 args.build_heuristics, args.out)
 
+  if args.generate_harness:
+    run_harness_generation(args.out)
+
 
 if __name__ == '__main__':
   main()

scripts/run-new-oss-fuzz-project/run-project.sh

@@ -43,7 +43,7 @@ cd ${OSS_FUZZ_DIR}
 
 for p2 in ${PROJECTS}; do
   python3 $FI_DIR/oss_fuzz_integration/runner.py \
-    introspector $p2 10 --disable-webserver
+    introspector $p2 1 --disable-webserver
   # Reset is necessary because some project exeuction
   # could break the display encoding which affect
   # the later oss-fuzz-gen execution.