add --descr flag to commit credential command

---
type: change
description: add --descr flag to commit credential command
fingerprint: APxIZwr3gXdnWV4YoTr63+ivLGLKDmUUwLNk1AfQo4Pi
credentials:
- type: pgp_signature
  pub_key_id: 95C46FA6A41148AC
  body: iQIzBAABAgAdFiEEJ6tQKp6olvZKJ0lwlcRvpqQRSKwFAl6+B5MACgkQlcRvpqQRSKysqBAAjktuDD/xOErpbnxOZUT0Vag25UQwxre9YlrxUEqvf6bXn43KL3B87hlZ3IuwMnTHxg5lw3vKg5pqkal21of5jOcV1X61mW0xmnsUhsfQLZQAsb/1JfOFbIcSJoEI7bREzkDh29OueFktw8j2Jhd4zYmEWBFB3/5twR2I3JHy+/KuA2kr1AwOC7GfMvItQDYpTfIL6/mF35zhXq7BcQWs6a/y2xLTz3aHFYtv3kqQ42xOwLFBsxlMdrJ7xpSH5g6+xFRazPG0mTDtsyTgappbKNQNJi+zkh9FNHw5t2IER1kem48nY49i3ua/5EYO8jrP6I9fUsAXMbM5MPN8GOGd4j2gSfj4phnJGBTlM8gE4elLtQK5kA/O/bgp3KmXdywi4fTkgk6JorsZcBZGEaLHQY0bh7OSyhofMeO/HddXvv8WyZs3GplAFdfziOyCSC+y3ZNvh7xX9fF8+ZbJCBJW529+ZlkMz4b5pJ1AQxqw99v7I7NT+Xz5xf412ykBz2m4L4JfPrzkAVvBGkZFrg32XhUbX+3s81b6c0g0RGdmuQnVHGoqytOAXdU8tMFJEEw6u90u8UAzI4lQ5fSZxkfV6PSyQ4GmIdX5fumHzCZJHR/WJ9Pb9RU0HlbGnW8xNpDCdizRiYMp/u1dEwtcG3m3GBx48Px9C738p73TaOHsYsM=
  account: mediocregopher

cmd/dehub/cmd_commit.go

@@ -107,7 +107,7 @@ func cmdCommit(ctx context.Context, cmd *dcmd.Cmd) {
 						return nil, fmt.Errorf("error collecting commit message from user: %w", err)
 
 					} else if *description == "" {
-						return nil, errors.New("empty commit message, not doing anything")
+						return nil, errors.New("empty description, not doing anything")
 					}
 				}
 
@@ -129,6 +129,7 @@ func cmdCommit(ctx context.Context, cmd *dcmd.Cmd) {
 			startRev := flag.String("start", "", "Revision of the starting commit to accredit (when accrediting a range of changes)")
 			endRev := flag.String("end", "HEAD", "Revision of the ending commit to accredit (when accrediting a range of changes)")
 			rev := flag.String("rev", "", "Revision of commit to accredit (when accrediting a single commit)")
+			description := flag.String("descr", "", "Description of changes being accredited")
 			cmd.Run(func() (context.Context, error) {
 				if *rev == "" && *startRev == "" {
 					return nil, errors.New("-rev or -start is required")
@@ -161,17 +162,22 @@ func cmdCommit(ctx context.Context, cmd *dcmd.Cmd) {
 				} else if len(commits) == 1 && commits[0].Payload.Credential != nil {
 					credPayUn = commits[0].Payload
 				} else {
-					lastDescr, err := dehub.LastChangeDescription(commits)
-					if err != nil {
-						return nil, fmt.Errorf("determining change description of commit(s): %w", err)
+					if *description == "" {
+						lastDescr, err := dehub.LastChangeDescription(commits)
+						if err != nil {
+							return nil, fmt.Errorf("determining change description of commit(s): %w", err)
+						}
+
+						*description, err = tmpFileMsg(defaultCommitFileMsgTpl, lastDescr)
+						if err != nil {
+							return nil, fmt.Errorf("collecting credential description from user: %w", err)
+						} else if *description == "" {
+							return nil, errors.New("empty description, not doing anything")
+						}
 					}
 
-					descr, err := tmpFileMsg(defaultCommitFileMsgTpl, lastDescr)
-					if err != nil {
-						return nil, fmt.Errorf("collecting credential description from user: %w", err)
-					}
-
-					credPayUn, err = proj.NewPayloadCredentialFromChanges(descr, commits)
+					var err error
+					credPayUn, err = proj.NewPayloadCredentialFromChanges(*description, commits)
 					if err != nil {
 						return nil, fmt.Errorf("constructing credential commit: %w", err)
 					}