Add dry run option, to test processing without actually downloading anything

2 files changed, 9 insertions, 3 deletions

diff --git a/src/wikiget/dl.py b/src/wikiget/dl.py
index 93e9743..5bc24e9 100644
--- a/src/wikiget/dl.py
+++ b/src/wikiget/dl.py
@@ -116,6 +116,8 @@ def download(f: File, args: Namespace) -> int:
         if os.path.isfile(dest) and not args.force:
             adapter.warning("File already exists, skipping download (use -f to force)")
             errors += 1
+        elif args.dry_run:
+            adapter.warning("Dry run, so nothing actually downloaded")
         else:
             try:
                 fd = open(dest, "wb")
@@ -143,9 +145,7 @@ def download(f: File, args: Namespace) -> int:
             try:
                 dl_sha1 = verify_hash(dest)
             except OSError as e:
-                adapter.error(
-                    f"File downloaded but could not be verified. {e}"
-                )
+                adapter.error(f"File downloaded but could not be verified. {e}")
                 errors += 1
                 return errors
 
diff --git a/src/wikiget/wikiget.py b/src/wikiget/wikiget.py
index cf877cf..693decb 100644
--- a/src/wikiget/wikiget.py
+++ b/src/wikiget/wikiget.py
@@ -113,6 +113,12 @@ def construct_parser() -> argparse.ArgumentParser:
         help="number of parallel downloads to attempt in batch mode",
         type=int,
     )
+    parser.add_argument(
+        "-n",
+        "--dry-run",
+        action="store_true",
+        help="check the download or batch file without actually downloading anything",
+    )
 
     return parser