feat(plugins): reload plugin at runtime (#2372)

* fix(plugins): proper error when wasm file does not exist

* reload working

* race condition handling

* refactor(plugins): start plugin

* refactor(plugins): plugin-loader

* refactor(plugins): load/reload plugin

* refactor(plugins): apply cached events

* fix(plugins): gittery loading

* chore(plugins): rename reload-plugin to start-or-reload-plugin

* chore(styling): small cleanups

* style(fmt): rustfmt

* style(fmt): cleanups

* style(fmt): cleanups

* test(e2e): update snapshots

* test(e2e): update snapshots

* chore(repo): comment plugin optimization because it doubles the CI time

12 files changed, 15 insertions, 1 deletions

diff --git a/zellij-utils/assets/compact-bar.wasm b/zellij-utils/assets/compact-bar.wasm
index 46267f5e7..00d14d0ea 100644..100755
--- a/zellij-utils/assets/compact-bar.wasm
+++ b/zellij-utils/assets/compact-bar.wasm
diff --git a/zellij-utils/assets/plugins/compact-bar.wasm b/zellij-utils/assets/plugins/compact-bar.wasm
index 00d14d0ea..0e3598d0b 100755
--- a/zellij-utils/assets/plugins/compact-bar.wasm
+++ b/zellij-utils/assets/plugins/compact-bar.wasm
diff --git a/zellij-utils/assets/plugins/status-bar.wasm b/zellij-utils/assets/plugins/status-bar.wasm
index 66e6b10d4..a1d0c8179 100755
--- a/zellij-utils/assets/plugins/status-bar.wasm
+++ b/zellij-utils/assets/plugins/status-bar.wasm
diff --git a/zellij-utils/assets/plugins/strider.wasm b/zellij-utils/assets/plugins/strider.wasm
index 287385a54..37da81bcc 100755
--- a/zellij-utils/assets/plugins/strider.wasm
+++ b/zellij-utils/assets/plugins/strider.wasm
diff --git a/zellij-utils/assets/plugins/tab-bar.wasm b/zellij-utils/assets/plugins/tab-bar.wasm
index b22bcf103..38f17dfc1 100755
--- a/zellij-utils/assets/plugins/tab-bar.wasm
+++ b/zellij-utils/assets/plugins/tab-bar.wasm
diff --git a/zellij-utils/assets/status-bar.wasm b/zellij-utils/assets/status-bar.wasm
index 5b4f6eb06..66e6b10d4 100644..100755
--- a/zellij-utils/assets/status-bar.wasm
+++ b/zellij-utils/assets/status-bar.wasm
diff --git a/zellij-utils/assets/strider.wasm b/zellij-utils/assets/strider.wasm
index 0af68b2f2..287385a54 100644..100755
--- a/zellij-utils/assets/strider.wasm
+++ b/zellij-utils/assets/strider.wasm
diff --git a/zellij-utils/assets/tab-bar.wasm b/zellij-utils/assets/tab-bar.wasm
index 1166de83c..b22bcf103 100644..100755
--- a/zellij-utils/assets/tab-bar.wasm
+++ b/zellij-utils/assets/tab-bar.wasm
diff --git a/zellij-utils/src/cli.rs b/zellij-utils/src/cli.rs
index aa8a27ea3..14bcfae7a 100644
--- a/zellij-utils/src/cli.rs
+++ b/zellij-utils/src/cli.rs
@@ -7,6 +7,7 @@ use crate::{
 use clap::{Parser, Subcommand};
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
+use url::Url;
 
 #[derive(Parser, Default, Debug, Clone, Serialize, Deserialize)]
 #[clap(version, name = "zellij")]
@@ -373,4 +374,7 @@ pub enum CliAction {
     NextSwapLayout,
     /// Query all tab names
     QueryTabNames,
+    StartOrReloadPlugin {
+        url: Url,
+    },
 }
diff --git a/zellij-utils/src/errors.rs b/zellij-utils/src/errors.rs
index e23c22bb0..8b49112b9 100644
--- a/zellij-utils/src/errors.rs
+++ b/zellij-utils/src/errors.rs
@@ -326,10 +326,13 @@ pub enum ScreenContext {
     NextSwapLayout,
     QueryTabNames,
     NewTiledPluginPane,
+    StartOrReloadPluginPane,
     NewFloatingPluginPane,
     AddPlugin,
     UpdatePluginLoadingStage,
     ProgressPluginLoadingOffset,
+    StartPluginLoadingIndication,
+    RequestStateUpdateForPlugins,
 }
 
 /// Stack call representations corresponding to the different types of [`PtyInstruction`]s.
@@ -355,6 +358,7 @@ pub enum PluginContext {
     Update,
     Render,
     Unload,
+    Reload,
     Resize,
     Exit,
     AddClient,
@@ -489,6 +493,9 @@ open an issue on GitHub:
 
     #[error("Client {client_id} is too slow to handle incoming messages")]
     ClientTooSlow { client_id: u16 },
+
+    #[error("The plugin does not exist")]
+    PluginDoesNotExist,
 }
 
 #[cfg(not(target_family = "wasm"))]
diff --git a/zellij-utils/src/input/actions.rs b/zellij-utils/src/input/actions.rs
index d03fd1202..c288b8d2b 100644
--- a/zellij-utils/src/input/actions.rs
+++ b/zellij-utils/src/input/actions.rs
@@ -16,6 +16,7 @@ use serde::{Deserialize, Serialize};
 
 use std::path::PathBuf;
 use std::str::FromStr;
+use url::Url;
 
 use crate::position::Position;
 
@@ -231,6 +232,7 @@ pub enum Action {
     /// Open a new tiled (embedded, non-floating) plugin pane
     NewTiledPluginPane(RunPluginLocation, Option<String>), // String is an optional name
     NewFloatingPluginPane(RunPluginLocation, Option<String>), // String is an optional name
+    StartOrReloadPlugin(Url),
 }
 
 impl Action {
@@ -471,6 +473,7 @@ impl Action {
             CliAction::PreviousSwapLayout => Ok(vec![Action::PreviousSwapLayout]),
             CliAction::NextSwapLayout => Ok(vec![Action::NextSwapLayout]),
             CliAction::QueryTabNames => Ok(vec![Action::QueryTabNames]),
+            CliAction::StartOrReloadPlugin { url } => Ok(vec![Action::StartOrReloadPlugin(url)]),
         }
     }
 }
diff --git a/zellij-utils/src/input/layout.rs b/zellij-utils/src/input/layout.rs
index 830f7c028..713b2775a 100644
--- a/zellij-utils/src/input/layout.rs
+++ b/zellij-utils/src/input/layout.rs
@@ -207,7 +207,7 @@ impl Run {
     }
 }
 
-#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq)]
+#[derive(Debug, Serialize, Deserialize, Clone, PartialEq, Eq, Hash)]
 pub struct RunPlugin {
     #[serde(default)]
     pub _allow_exec_host_cmd: bool,