This change improves the `rad clone` command in a few different ways.
The first improvement is to check if the repository already exists before
fetching. If it does exist, then there is no need for the fetch to be performed,
and can move straight to the checkout.
If the repository does not exist, then the fetch is performed, as per usual.
However, it uses a replication factor of 1, so that the fetch finishes as soon
as it has the repository in local storage.
The change also improves the output when failures occur while attempting to
perform the checkout phase. It will print the failure that occurred and provide
a hint message in each case to help debug the failure, or push the caller in the
direction of performing the correct action.
This required some changes in `test/commands.rs` setup. Some tests were using
the `rad-clone.md` to setup a clone, which would have different output if the
repository did not need to be fetched. In those cases, the `rad` method for
performing the clone is used instead.
This patch changes separates the business logic of fetching from the process of
fetching itself. It does this through a sans-IO approach, where a `Fetcher`
provides the necessary state to help drive a fetch forward, without performing
any of the IO itself.
What the `Fetcher` cares about is:
- What nodes are going to be attempted to be fetched from
- In what order should they be attempted
- When should the fetching process be considered finished
The `Fetcher` is then used in `radicle-cli` to drive forward the `sync::fetch`
function, allowing it to only care about the IO.
* Remove `rad sync --force` flag
* Remove `rad clone --private` flag
These flags are no longer necessary. Simplify specifying which seed
to fetch from with `--seed` is enough.
Fintan Halpenny
Lorenz Leutgeb
cloudhead