Implemented tree closing and opening

Author: Rhythm1710

.gitignore

@@ -1 +1,2 @@
 target/
+.env

.sqlx/query-36b571f54091ac1caaf1a5fa85081621bd93fdb2edf55689ce0232d48e8c51cd.json

@@ -0,0 +1,2 @@
+-- Add down migration script here
+DROP TABLE IF EXISTS repository;

.sqlx/query-4ba899ceb5200a74b944f26b4df293d6eaeb7c10e4a9d594b003f04a7f493dc1.json

@@ -0,0 +1,8 @@
+-- Add up migration script here
+CREATE TABLE repository (
+    id SERIAL PRIMARY KEY,
+    name TEXT NOT NULL UNIQUE,
+    treeclosed INT NULL,
+    treeclosed_src TEXT,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);

.sqlx/query-87cc4d406832a9957d4f4b7599e1a3aa67b0bcf3dc0438c568031bd93c511876.json

@@ -1,7 +1,4 @@
 mod parser;
-use std::fmt;
-use std::str::FromStr;
-
 use crate::github::CommitSha;
 pub use parser::{CommandParseError, CommandParser};
 
@@ -25,42 +22,6 @@ pub enum Approver {
     Specified(String),
 }
 
-const ROLLUP_VALUES: [&str; 4] = ["always", "iffy", "maybe", "never"];
-
-#[derive(Copy, Clone, Debug, PartialEq)]
-pub enum RollupMode {
-    Always,
-    Iffy,
-    Maybe,
-    Never,
-}
-
-impl fmt::Display for RollupMode {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let s = match self {
-            RollupMode::Always => "always",
-            RollupMode::Iffy => "iffy",
-            RollupMode::Never => "never",
-            RollupMode::Maybe => "maybe",
-        };
-        write!(f, "{}", s)
-    }
-}
-
-impl FromStr for RollupMode {
-    type Err = ();
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        match s {
-            "always" => Ok(RollupMode::Always),
-            "iffy" => Ok(RollupMode::Iffy),
-            "never" => Ok(RollupMode::Never),
-            "maybe" => Ok(RollupMode::Maybe),
-            _ => Err(()),
-        }
-    }
-}
-
 /// Bors command specified by a user.
 #[derive(Debug, PartialEq)]
 pub enum BorsCommand {
@@ -70,8 +31,6 @@ pub enum BorsCommand {
         approver: Approver,
         /// Priority of the commit.
         priority: Option<Priority>,
-        // Rollup status of the commit.
-        rollup: Option<RollupMode>,
     },
     /// Unapprove a commit.
     Unapprove,
@@ -94,6 +53,8 @@ pub enum BorsCommand {
     Delegate,
     /// Revoke any previously granted delegation.
     Undelegate,
-    /// Rollup status.
-    Rollup(RollupMode),
+    /// Open the repository tree for merging.
+    TreeOpen,
+    /// Set the tree closed with a priority level.
+    TreeClosed(Priority),
 }