Verify downloaded rust-analyzer and clang binaries by checking the artifact digest (#35642)

Release Notes:

- Added GitHub artifact digest verification for rust-analyzer and clangd
binary downloads, skipping downloads if cached binary digest is up to
date
- Added verification that cached rust-analyzer and clangd binaries are
executable, if not they are redownloaded

---------

Co-authored-by: Kirill Bulatov <kirill@zed.dev>

crates/util/src/archive.rs

@@ -2,6 +2,8 @@ use std::path::Path;
 
 use anyhow::{Context as _, Result};
 use async_zip::base::read;
+#[cfg(not(windows))]
+use futures::AsyncSeek;
 use futures::{AsyncRead, io::BufReader};
 
 #[cfg(windows)]
@@ -62,7 +64,15 @@ pub async fn extract_zip<R: AsyncRead + Unpin>(destination: &Path, reader: R) ->
     futures::io::copy(&mut BufReader::new(reader), &mut file)
         .await
         .context("saving archive contents into the temporary file")?;
-    let mut reader = read::seek::ZipFileReader::new(BufReader::new(file))
+    extract_seekable_zip(destination, file).await
+}
+
+#[cfg(not(windows))]
+pub async fn extract_seekable_zip<R: AsyncRead + AsyncSeek + Unpin>(
+    destination: &Path,
+    reader: R,
+) -> Result<()> {
+    let mut reader = read::seek::ZipFileReader::new(BufReader::new(reader))
         .await
         .context("reading the zip archive")?;
     let destination = &destination

crates/util/src/fs.rs

@@ -95,9 +95,9 @@ pub async fn move_folder_files_to_folder<P: AsRef<Path>>(
 #[cfg(unix)]
 /// Set the permissions for the given path so that the file becomes executable.
 /// This is a noop for non-unix platforms.
-pub async fn make_file_executable(path: &PathBuf) -> std::io::Result<()> {
+pub async fn make_file_executable(path: &Path) -> std::io::Result<()> {
     fs::set_permissions(
-        &path,
+        path,
         <fs::Permissions as fs::unix::PermissionsExt>::from_mode(0o755),
     )
     .await
@@ -107,6 +107,6 @@ pub async fn make_file_executable(path: &PathBuf) -> std::io::Result<()> {
 #[allow(clippy::unused_async)]
 /// Set the permissions for the given path so that the file becomes executable.
 /// This is a noop for non-unix platforms.
-pub async fn make_file_executable(_path: &PathBuf) -> std::io::Result<()> {
+pub async fn make_file_executable(_path: &Path) -> std::io::Result<()> {
     Ok(())
 }