assistant2: Restrict directory context picker to development builds (#22302)

This PR temporarily restricts the directory context picker to
development builds until the implementation is finished.

Release Notes:

- N/A

Cargo.lock

@@ -493,6 +493,7 @@ dependencies = [
  "project",
  "proto",
  "rand 0.8.5",
+ "release_channel",
  "rope",
  "schemars",
  "serde",

crates/assistant2/Cargo.toml

@@ -50,6 +50,7 @@ parking_lot.workspace = true
 picker.workspace = true
 project.workspace = true
 proto.workspace = true
+release_channel.workspace = true
 rope.workspace = true
 schemars.workspace = true
 serde.workspace = true

crates/assistant2/src/context_picker.rs

@@ -10,6 +10,7 @@ use gpui::{
     WeakModel, WeakView,
 };
 use picker::{Picker, PickerDelegate};
+use release_channel::ReleaseChannel;
 use ui::{prelude::*, ListItem, ListItemSpacing};
 use util::ResultExt;
 use workspace::Workspace;
@@ -50,23 +51,27 @@ impl ContextPicker {
         confirm_behavior: ConfirmBehavior,
         cx: &mut ViewContext<Self>,
     ) -> Self {
-        let mut entries = vec![
+        let mut entries = Vec::new();
-            ContextPickerEntry {
+        entries.push(ContextPickerEntry {
-                name: "File".into(),
+            name: "File".into(),
-                kind: ContextKind::File,
+            kind: ContextKind::File,
-                icon: IconName::File,
+            icon: IconName::File,
-            },
+        });
-            ContextPickerEntry {
+        let release_channel = ReleaseChannel::global(cx);
+        // The directory context picker isn't fully implemented yet, so limit it
+        // to development builds.
+        if release_channel == ReleaseChannel::Dev {
+            entries.push(ContextPickerEntry {
                 name: "Folder".into(),
                 kind: ContextKind::Directory,
                 icon: IconName::Folder,
-            },
+            });
-            ContextPickerEntry {
+        }
-                name: "Fetch".into(),
+        entries.push(ContextPickerEntry {
-                kind: ContextKind::FetchedUrl,
+            name: "Fetch".into(),
-                icon: IconName::Globe,
+            kind: ContextKind::FetchedUrl,
-            },
+            icon: IconName::Globe,
-        ];
+        });
 
         if thread_store.is_some() {
             entries.push(ContextPickerEntry {