cmds(repo rm-root): bring --remove-existing-root in-line with it's documentation

This command is already annoying enough. If a user decides to automate this,
that's their issue (and we should allow it).

(also rename back to remove-existing-root from remove-local-root)

License: MIT
Signed-off-by: Steven Allen <steven@stebalien.com>

core/commands/repo.go

@@ -286,11 +286,11 @@ This command can only run when the ipfs daemon is not running.
 	},
 	Options: []cmdkit.Option{
 		cmdkit.BoolOption("confirm", "Really perform operation."),
-		cmdkit.BoolOption("remove-local-root", "Remove even if the root exists locally."),
+		cmdkit.BoolOption("remove-existing-root", "Remove even if it root exists locally."),
 	},
 	Run: func(req *cmds.Request, res cmds.ResponseEmitter, env cmds.Environment) error {
 		confirm, _ := req.Options["confirm"].(bool)
-		removeLocalRoot, _ := req.Options["remove-local-root"].(bool)
+		removeExistingRoot, _ := req.Options["remove-existing-root"].(bool)
 
 		if !confirm {
 			return fmt.Errorf("this is a potentially dangerous operation please pass --confirm to proceed")
@@ -328,10 +328,8 @@ This command can only run when the ipfs daemon is not running.
 			cidStr = b58.Encode(val)
 		}
 
-		if have && !removeLocalRoot {
-			return fmt.Errorf("root %s exists locally. Are you sure you want to unlink this? Pass --remove-local-root to continue", cidStr)
-		} else if !have && removeLocalRoot {
-			return fmt.Errorf("root does not %s exists locally. Please remove --remove-local-root to continue", cidStr)
+		if have && !removeExistingRoot {
+			return fmt.Errorf("root %s exists locally. Are you sure you want to unlink this? Pass --remove-existing-root to continue", cidStr)
 		}
 
 		err = repo.Datastore().Delete(core.FilesRootKey)

test/sharness/t0089-repo-rm-root.sh

@@ -18,14 +18,14 @@ test_expect_success "ipfs repo rm-root fails without --confirm" '
   fgrep -q "please pass --confirm to proceed" err
 '
 
-test_expect_success "ipfs repo rm-root fails to remove existing root without --remove-local-root" '
+test_expect_success "ipfs repo rm-root fails to remove existing root without --remove-existing-root" '
   test_must_fail ipfs repo rm-root --confirm 2> err &&
   cat err &&
   fgrep -q "Are you sure you want to unlink this?" err
 '
 
 test_expect_success "ipfs repo rm-root" '
-  ipfs repo rm-root --confirm --remove-local-root | tee rm-root.actual &&
+  ipfs repo rm-root --confirm --remove-existing-root | tee rm-root.actual &&
   echo "Unlinked files API root.  Root hash was $ROOT_HASH." > rm-root.expected &&
   test_cmp rm-root.expected rm-root.actual
 '