From bbf12b8c56b253a4e5c09c01a91aa6a0319634d9 Mon Sep 17 00:00:00 2001
From: Chris Wanstrath <chris@ozmm.org>
Date: Mon, 30 Mar 2026 18:42:51 -0700
Subject: [PATCH] Install sccache from prebuilt binary instead of compiling
 from source

Downloading the release tarball is significantly faster than
cargo install, which must compile sccache and all its dependencies.
---
 src/vm.ts | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/vm.ts b/src/vm.ts
index f24bdcb..2d24f66 100644
--- a/src/vm.ts
+++ b/src/vm.ts
@@ -183,8 +183,11 @@ async function installPersistentTooling(log?: (msg: string) => void): Promise<vo
   const hasSccache = await $`container exec --user ${USER} ${CONTAINER_NAME} test -x /sandlot/.cargo/bin/sccache`.nothrow().quiet()
   if (hasSccache.exitCode !== 0) {
     log?.("Installing sccache")
+    const sccacheVersion = "v0.14.0"
+    const sccacheArchive = `sccache-${sccacheVersion}-aarch64-unknown-linux-musl.tar.gz`
+    const sccacheUrl = `https://github.com/mozilla/sccache/releases/download/${sccacheVersion}/${sccacheArchive}`
     await run(
-      $`container exec --user ${USER} ${CONTAINER_NAME} env ${`RUSTUP_HOME=${CONTAINER_ENV.RUSTUP_HOME}`} ${`CARGO_HOME=${CONTAINER_ENV.CARGO_HOME}`} ${`PATH=${CONTAINER_ENV.CARGO_HOME}/bin:$PATH`} cargo install sccache --locked`,
+      $`container exec --user ${USER} ${CONTAINER_NAME} bash -c ${`curl -fsSL ${sccacheUrl} | tar xz -C /tmp && cp /tmp/sccache-${sccacheVersion}-aarch64-unknown-linux-musl/sccache /sandlot/.cargo/bin/sccache && chmod +x /sandlot/.cargo/bin/sccache && rm -rf /tmp/sccache-${sccacheVersion}-aarch64-unknown-linux-musl`}`,
       "sccache installation")
     await $`container exec --user ${USER} ${CONTAINER_NAME} bash -c ${"mkdir -p /sandlot/.sccache"}`.nothrow().quiet()
   }