Make template renders inherit perms of template

manager/src/builder.rs

@@ -10,7 +10,8 @@ use std::io::ErrorKind;
 use std::path::PathBuf;
 use std::process::Command;
 use std::str::from_utf8;
-use tokio::fs::{copy, create_dir, read_dir, read_to_string, write};
+use tokio::fs::{copy, create_dir, read_dir, read_to_string, File};
+use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use tokio::join;
 
 pub const TEMPLATE_EXTENSION: &str = "tpl";
@@ -115,10 +116,22 @@ async fn file(cfg: &Config, env: &Env, relative: PathBuf) -> Result<(), Error> {
 
     if template_path.extension() == Some(OsStr::new(TEMPLATE_EXTENSION)) {
         // perform templating
-        let file_str = read_to_string(&template_path)
+        let mut template_file = File::open(&template_path)
             .await
             .with_location(&template_path)?;
 
+        let mut file_str = String::new();
+        template_file
+            .read_to_string(&mut file_str)
+            .await
+            .with_location(&template_path)?;
+
+        let permissions = template_file
+            .metadata()
+            .await
+            .with_location(&template_path)?
+            .permissions();
+
         let mut rendered = Vec::<u8>::new();
         parse_template(&file_str)
             .with_location(&template_path)?
@@ -129,8 +142,19 @@ async fn file(cfg: &Config, env: &Env, relative: PathBuf) -> Result<(), Error> {
         // remove template file extension
         new_path.set_extension("");
 
+        let mut rendered_file = File::create(&new_path).await.with_location(&new_path)?;
+
         // write the rendered file
-        write(&new_path, &rendered).await.with_location(&new_path)?;
+        rendered_file
+            .write_all(rendered.as_bytes())
+            .await
+            .with_location(&new_path)?;
+
+        // make sure the permissions match the original
+        rendered_file
+            .set_permissions(permissions)
+            .await
+            .with_location(&new_path)?;
     } else {
         // else just copy the file
         debug!("copying {:?}", template_path);