Merge branch 'eero/diroid' into 'master'

[NODE-1355] Create tool to help with migration to e2fsdroid

One chunk of https://gitlab.com/dfinity-lab/public/ic/-/merge_requests/19059. 

See merge request dfinity-lab/public/ic!19273

Cargo.toml

@@ -124,6 +124,7 @@ members = [
     "rs/http_utils",
     "rs/ic_os/deterministic_ips",
     "rs/ic_os/dflate",
+    "rs/ic_os/diroid",
     "rs/ic_os/config",
     "rs/ic_os/fstrim_tool",
     "rs/ic_os/guestos_tool",

rs/ic_os/diroid/BUILD.bazel

@@ -0,0 +1,17 @@
+load("@rules_rust//rust:defs.bzl", "rust_binary")
+
+package(default_visibility = ["//visibility:public"])
+
+DEPENDENCIES = [
+    "@crate_index//:walkdir",
+]
+
+MACRO_DEPENDENCIES = []
+
+rust_binary(
+    name = "diroid",
+    srcs = glob(["src/**/*.rs"]),
+    proc_macro_deps = MACRO_DEPENDENCIES,
+    version = "0.1.0",
+    deps = DEPENDENCIES,
+)

rs/ic_os/diroid/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "diroid"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+walkdir = "2.5.0"

rs/ic_os/diroid/README.md

@@ -0,0 +1,4 @@
+# diroid
+
+`diroid` is a tool that generates an `e2fsdroid` `fs_config` file for a given directory tree.
+This file describes the metadata associated with files as they are placed into the filesystem.

rs/ic_os/diroid/src/main.rs

@@ -0,0 +1,25 @@
+use std::env;
+use std::os::unix::fs::MetadataExt;
+
+use walkdir::WalkDir;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        panic!("Incorrect arguments!");
+    }
+
+    for entry in WalkDir::new(&args[1]) {
+        let entry = entry.unwrap();
+
+        let metadata = entry.metadata().unwrap();
+        println!(
+            "{} {} {} {:o}",
+            entry.path().strip_prefix(&args[1]).unwrap().display(),
+            metadata.uid(),
+            metadata.gid(),
+            metadata.mode()
+        );
+    }
+}