Add a download flag to hashsum and related commands to force rclone to download and hash files locally

This commit modifies the operations.hashSum function by adding an alternate code path. This code path is triggered by passing downloadFlag = True. When activated, rclone will download files from the remote and hash them locally. downloadFlag = False preserves the existing behavior of using the remote to retrieve the hash.

This commit modifies HashLister to support the new hashSum method as well as consolidating the roles of HashLister, HashListerBase64, Md5sum, and Sha1sum.  The printing of hashes from the function defined in HashLister has been revised to work with --progress.  There are light changes to operations.syncFprintf and cmd.startProgress for this.

The unit test operations_test.TestHashSums is modified to support this change and test the download functionality.

The command functions hashsum, md5sum, sha1sum, and dbhashsum are modified to support this change.  A download flag has been added and an output-file flag has been added.  The output-file flag writes hashes to a file instead of stdout to avoid the need to redirect stdout.
This commit is contained in:
lostheli
2020-12-18 07:45:58 -05:00
committed by Nick Craig-Wood
parent ed7af3f370
commit c8cfa43ccc
10 changed files with 319 additions and 75 deletions

View File

@@ -15,6 +15,11 @@ Produces an md5sum file for all the objects in the path.
Produces an md5sum file for all the objects in the path. This
is in the same format as the standard md5sum tool produces.
By default, the hash is requested from the remote. If MD5 is
not supported by the remote, no hash will be returned. With the
download flag, the file will be downloaded from the remote and
hashed locally enabling MD5 for any remote.
```
rclone md5sum remote:path [flags]
@@ -23,7 +28,10 @@ rclone md5sum remote:path [flags]
## Options
```
-h, --help help for md5sum
--base64 Output base64 encoded hashsum
--download Download the file and hash it locally; if this flag is not specified, the hash is requested from the remote
-h, --help help for md5sum
--output-file string Output hashsums to a file rather than the terminal
```
See the [global flags page](/flags/) for global options not listed here.