Improve how node roles are assigned in Garagev0.5-beta1

- change the terminology: the network configuration becomes the role
  table, the configuration of a nodes becomes a node's role
- the modification of the role table takes place in two steps: first,
  changes are staged in a CRDT data structure. Then, once the user is
  happy with the changes, they can commit them all at once (or revert
  them).
- update documentation
- fix tests
- implement smarter partition assignation algorithm

This patch breaks the format of the network configuration: when
migrating, the cluster will be in a state where no roles are assigned.
All roles must be re-assigned and commited at once. This migration
should not pose an issue.

1 files changed, 0 insertions, 34 deletions

diff --git a/src/table/crdt/bool.rs b/src/table/crdt/bool.rs
deleted file mode 100644
index 53af8f82..00000000
--- a/src/table/crdt/bool.rs
+++ /dev/null
@@ -1,34 +0,0 @@
-use serde::{Deserialize, Serialize};
-
-use crate::crdt::crdt::*;
-
-/// Boolean, where `true` is an absorbing state
-#[derive(Clone, Copy, Debug, Serialize, Deserialize, PartialEq)]
-pub struct Bool(bool);
-
-impl Bool {
-	/// Create a new boolean with the specified value
-	pub fn new(b: bool) -> Self {
-		Self(b)
-	}
-	/// Set the boolean to true
-	pub fn set(&mut self) {
-		self.0 = true;
-	}
-	/// Get the boolean value
-	pub fn get(&self) -> bool {
-		self.0
-	}
-}
-
-impl From<bool> for Bool {
-	fn from(b: bool) -> Bool {
-		Bool::new(b)
-	}
-}
-
-impl Crdt for Bool {
-	fn merge(&mut self, other: &Self) {
-		self.0 = self.0 || other.0;
-	}
-}