repo-list: print shortened archive IDs

256bits (64 hex digits) is a bit much and as borg
can also deal with abbreviated IDs, we only show
32bits (8 hex digits) by default.

src/borg/archiver/repo_list_cmd.py

@@ -22,7 +22,7 @@ def do_repo_list(self, args, repository, manifest):
         elif args.short:
             format = "{id}{NL}"
         else:
-            format = os.environ.get("BORG_RLIST_FORMAT", "{archive:<36} {time} [{id}]{NL}")
+            format = os.environ.get("BORG_RLIST_FORMAT", "{archive:<36} {time} [{id32}]{NL}")
         formatter = ArchiveFormatter(format, repository, manifest, manifest.key, iec=args.iec)
 
         output_data = []

src/borg/helpers/parseformat.py

@@ -776,13 +776,14 @@ class ArchiveFormatter(BaseFormatter):
         "end": "time (end) of creation of the archive",
         "command_line": "command line which was used to create the archive",
         "id": "internal ID of the archive",
+        "id32": "internal ID of the archive, first 32 bits",
         "hostname": "hostname of host on which this archive was created",
         "username": "username of user who created this archive",
         "size": "size of this archive (data plus metadata, not considering compression and deduplication)",
         "nfiles": "count of files in this archive",
     }
     KEY_GROUPS = (
-        ("archive", "name", "comment", "id"),
+        ("archive", "name", "comment", "id", "id32"),
         ("start", "time", "end", "command_line"),
         ("hostname", "username"),
         ("size", "nfiles"),
@@ -816,11 +817,13 @@ def get_item_data(self, archive_info, jsonline=False):
         self.id = archive_info.id
         item_data = {}
         item_data.update({} if jsonline else self.static_data)
+        id_hex = bin_to_hex(archive_info.id)
         item_data.update(
             {
                 "name": archive_info.name,
                 "archive": archive_info.name,
-                "id": bin_to_hex(archive_info.id),
+                "id": id_hex,
+                "id32": id_hex[:8],
                 "time": self.format_time(archive_info.ts),
                 "start": self.format_time(archive_info.ts),
             }