Add ZIP archives support

I create this MR to have your help. There are some issues with the CI. Can you help me to correct them ?

libmat2/archive.py

@@ -2,6 +2,7 @@ import zipfile
 import datetime
 import tempfile
 import os
+import sys
 import logging
 import shutil
 from typing import Dict, Set, Pattern
@@ -48,11 +49,10 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
         zipinfo.date_time = (1980, 1, 1, 0, 0, 0)  # this is as early as a zipfile can be
         return zipinfo
 
-    @staticmethod
-    def _get_zipinfo_meta(zipinfo: zipfile.ZipInfo) -> Dict[str, str]:
+    def _get_zipinfo_meta(self, zipinfo: zipfile.ZipInfo) -> Dict[str, str]:
         metadata = {}
         if zipinfo.create_system == 3:  # this is Linux
-            pass
+            metadata['create_system'] = 'Linux'
         elif zipinfo.create_system == 2:
             metadata['create_system'] = 'Windows'
         else:
@@ -64,11 +64,16 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
         if zipinfo.date_time != (1980, 1, 1, 0, 0, 0):
             metadata['date_time'] = str(datetime.datetime(*zipinfo.date_time))
 
+        ret = self._parse_files()
+        metadata_files = ret[0]
+        for name, _ in metadata_files.items():
+            metadata[name] = metadata_files
         return metadata
 
-    def remove_all(self) -> bool:
-        # pylint: disable=too-many-branches
-
+    # pylint: disable=too-many-branches
+    def _parse_files(self) -> tuple:
+        metadata = {} # type: dict
+        caller = sys._getframe(1).f_code.co_name
         with zipfile.ZipFile(self.filename) as zin,\
              zipfile.ZipFile(self.output_filename, 'w') as zout:
 
@@ -84,11 +89,12 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
                 zin.extract(member=item, path=temp_folder)
                 full_path = os.path.join(temp_folder, item.filename)
 
-                if self._specific_cleanup(full_path) is False:
-                    logging.warning("Something went wrong during deep cleaning of %s",
-                                    item.filename)
-                    abort = True
-                    continue
+                if caller == "remove_all":
+                    if self._specific_cleanup(full_path) is False:
+                        logging.warning("Something went wrong during deep cleaning of %s",
+                                        item.filename)
+                        abort = True
+                        continue
 
                 if any(map(lambda r: r.search(item.filename), self.files_to_keep)):
                     # those files aren't supported, but we want to add them anyway
@@ -112,8 +118,11 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
                             abort = True
                             continue
                     if tmp_parser:
-                        tmp_parser.remove_all()
-                        os.rename(tmp_parser.output_filename, full_path)
+                        if caller == "remove_all":
+                            tmp_parser.remove_all()
+                            os.rename(tmp_parser.output_filename, full_path)
+                        else:
+                            metadata[item.filename] = tmp_parser.get_meta()
 
                 zinfo = zipfile.ZipInfo(item.filename)  # type: ignore
                 clean_zinfo = self._clean_zipinfo(zinfo)
@@ -123,5 +132,20 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
         shutil.rmtree(temp_folder)
         if abort:
             os.remove(self.output_filename)
-            return False
-        return True
+        return metadata, abort
+
+    def remove_all(self) -> bool:
+        ret = self._parse_files()
+        return not ret[1]
+
+class ZIPParser(ArchiveBasedAbstractParser):
+    mimetypes = {'application/zip'}
+
+    def get_meta(self) -> Dict[str, str]:
+        metadata = {}
+        zipin = zipfile.ZipFile(self.filename)
+        for item in zipin.infolist():
+            for key, value in self._get_zipinfo_meta(item).items():
+                metadata[key] = value
+        zipin.close()
+        return metadata