[DO NOT MERGE] Make download dir read-only

build_system/prepare.rs

@@ -8,6 +8,11 @@ use crate::path::{Dirs, RelPath};
 use crate::utils::{copy_dir_recursively, ensure_empty_dir, spawn_and_wait};
 
 pub(crate) fn prepare(dirs: &Dirs) {
+    if dirs.download_dir.exists() {
+        let mut make_readwrite_cmd = Command::new("chmod");
+        make_readwrite_cmd.arg("-R").arg("u+w").arg(".").current_dir(&dirs.download_dir);
+        spawn_and_wait(make_readwrite_cmd);
+    }
     std::fs::create_dir_all(&dirs.download_dir).unwrap();
     crate::tests::RAND_REPO.fetch(dirs);
     crate::tests::REGEX_REPO.fetch(dirs);
@@ -140,6 +145,10 @@ impl GitRepo {
         }
 
         self.verify_checksum(dirs);
+
+        let mut make_readonly_cmd = Command::new("chmod");
+        make_readonly_cmd.arg("-R").arg("-w").arg(download_dir);
+        spawn_and_wait(make_readonly_cmd);
     }
 
     pub(crate) fn patch(&self, dirs: &Dirs) {
@@ -150,6 +159,10 @@ impl GitRepo {
             &self.download_dir(dirs),
             &self.source_dir().to_path(dirs),
         );
+
+        let mut make_readonly_cmd = Command::new("chmod");
+        make_readonly_cmd.arg("-R").arg("-w").arg(self.source_dir().to_path(dirs));
+        spawn_and_wait(make_readonly_cmd);
     }
 }