From 6c9b513d1cc04102e42a6cf1a27951b490cc1180 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Emilio=20Cobos=20=C3=81lvarez?= <emilio@crisal.io>
Date: Tue, 9 Jun 2026 01:36:18 +0200
Subject: [PATCH] Allow extension to work while offline.

Keep the relative path to the latest version to fall back on when
fetching the GitHub release fails.

Ideally we could even optimistically use that while updating in the
background, or something, but that's not implemented in this commit.
---
 src/typst.rs | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/typst.rs b/src/typst.rs
index cab2f1e..00ce23d 100644
--- a/src/typst.rs
+++ b/src/typst.rs
@@ -53,7 +53,23 @@ impl TypstExtension {
                 require_assets: true,
                 pre_release: false,
             },
-        )?;
+        );
+
+        let release = match release {
+            Ok(r) => r,
+            Err(e) => {
+                if let Ok(path) = fs::read_to_string("latest-binary") {
+                    if fs::metadata(&path).is_ok_and(|stat| stat.is_file()) {
+                        return Ok(TinymistBinary {
+                            path,
+                            args: binary_args,
+                            environment: None,
+                        });
+                    }
+                }
+                return Err(e);
+            }
+        };
 
         let (platform, arch) = zed::current_platform();
         let mut asset_name = format!(
@@ -108,6 +124,8 @@ impl TypstExtension {
                     fs::remove_dir_all(entry.path()).ok();
                 }
             }
+
+            let _ = fs::write("latest-binary", &binary_path);
         }
 
         self.cached_binary_path = Some(binary_path.clone());