fix(capa2sarif): remove dependencies from pyproject toml to guarded i…

…mport statements

pyproject.toml

@@ -86,8 +86,6 @@ dev = [
     "stix2==3.0.1",
     "requests==2.31.0",
     "mypy-protobuf==3.6.0",
-    "sarif_om==1.0.4",
-    "jschema_to_python==1.2.3",
     # type stubs for mypy
     "types-backports==0.1.3",
     "types-colorama==0.4.15.11",

scripts/capa2sarif.py

@@ -23,16 +23,26 @@
 import argparse
 from pathlib import Path
 
-from sarif_om import Tool, SarifLog, Run, ToolComponent
-from jschema_to_python.to_json import to_json
-
 from capa.version import __version__
 
 from typing import Optional, List
 
 
 logger = logging.getLogger('capa2sarif')
 
+# Dependencies
+try:
+    from sarif_om import Tool, SarifLog, Run, ToolComponent
+except ImportError as e:
+    logger.error("Required import `sarif_om` is not installed. This is solved by installing `python3 -m pip install sarif_om>=1.0.4`. %s", e)
+    exit(-4)
+
+try:
+    from jschema_to_python.to_json import to_json
+except ImportError as e:
+    logger.error("Required import `jschema_to_python` is not installed. This is solved by installing `python3 -m pip install jschema_to_python>=1.2.3`, %s", e)
+    exit(-4)
+
 
 def _parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(