Now handling the script's own crashes: saving to log and build status file (close #25).

README.md

@@ -71,6 +71,7 @@ The following are the possible results of the build:
 - `baseimage_unavailable`: The base image needed for this container is not available.
 - `artifact_unavailable`: The artifact could not be downloaded.
 - `dockerfile_not_found`: No Dockerfile has been found in the location specified in the configuration file.
+- `script_crash`: An error has occurred with the script itself.
 - `unknown_error`: Any other error.
 
 ### Artifact hash log

ecg.py

@@ -21,6 +21,7 @@ import logging
 import datetime
 import sys
 import string
+import traceback
 
 def trim(url):
     """
@@ -375,7 +376,8 @@ def main():
         description = "ECG is a program that automates software environment checking for scientific artifacts. "
             "It is meant to be executed periodically to analyze variations in the software environment of the artifact through time."
     )
-    parser.add_argument('-v', '--verbose',
+    parser.add_argument(
+        '-v', '--verbose',
         action = 'store_true',
         help = "Shows more details on what is being done."
     )
@@ -409,7 +411,8 @@ def main():
                 "If not specified, cache is disabled.",
         required = False
     ),
-    parser.add_argument('--docker-cache',
+    parser.add_argument(
+        '--docker-cache',
         action = 'store_true',
         help = "Use cache for Docker 'build'."
     )
@@ -433,6 +436,8 @@ def main():
     # Parsing the input file including the configuration of the artifact's
     # image:
     config_path = args.config
+    status = ""
+    try:
         config_file = open(config_path, "r")
         config = json.loads(config_file.read())
         # config = yaml.safe_load(config_file)
@@ -448,12 +453,10 @@ def main():
             use_cache = True
             dl_dir = cache_dir
         artifact_dir = download_sources(config, arthashlog_path, dl_dir, use_cache)
-    status = ""
         # If download was successful:
         if artifact_dir != "":
             artifact_name = os.path.splitext(os.path.basename(config_path))[0]
             return_code, build_output = build_image(config, artifact_dir, artifact_name, args.docker_cache)
-        status = ""
             if return_code == 0:
                 status = "success"
                 check_env(config, artifact_dir, artifact_name, pkglist_path)
@@ -466,6 +469,14 @@ def main():
         else:
             logging.fatal("Artifact could not be downloaded!")
             status = "artifact_unavailable"
+    except Exception as err:
+        # Handles any possible script's own crashes:
+        formatted_err = str(''.join(traceback.format_exception(None, err, err.__traceback__)))
+        log_file = open(log_path, "a")
+        log_file.write(formatted_err)
+        log_file.close()
+        print(formatted_err)
+        status = "script_crash"
     buildresult_saver(status, buildstatus_path, config_path)
 
 if __name__ == "__main__":