Add Rust FFI bridge for Manifold uploads

Summary: Rust crate wrapping corpmanifold for cross-platform Manifold writes

Reviewed By: janezhang10

Differential Revision: D98157675

fbshipit-source-id: c1378109332a468df4d3d9fd38a8328906927489

Author: Chandhana Solainathan

eden/fs/Cargo.toml

@@ -95,6 +95,7 @@ members = [
   "inodes/overlay/services",
   "rust/edenfs-asserted-states",
   "rust/edenfs-asserted-states-client",
+  "rust/manifold_ffi",
   "rust/redirect_ffi",
   "service",
   "service/clients",

eden/fs/rust/manifold_ffi/BUCK

@@ -0,0 +1,17 @@
+load("@fbsource//tools/build_defs:rust_library.bzl", "rust_library")
+
+oncall("scm_client_infra")
+
+rust_library(
+    name = "manifold-ffi",
+    srcs = glob(["src/**/*.rs"]),
+    crate_root = "src/lib.rs",
+    cxx_bridge = "src/lib.rs",
+    deps = [
+        "fbsource//third-party/rust:anyhow",
+        "fbsource//third-party/rust:cxx",
+        "//common/rust/shed/fbinit:fbinit",
+        "//eden/scm/lib/edenfs_ffi/cxxerror:cxxerror",
+        "//scm/telemetry/corpmanifold:corpmanifold",
+    ],
+)

eden/fs/rust/manifold_ffi/Cargo.toml

@@ -0,0 +1,14 @@
+# @generated by autocargo from //eden/fs/rust/manifold_ffi:manifold-ffi
+
+[package]
+name = "manifold-ffi"
+version = "0.1.0"
+authors = ["Facebook Source Control Team <sourcecontrol-dev@fb.com>"]
+edition = "2024"
+license = "GPLv2+"
+
+[dependencies]
+anyhow = "1.0.102"
+cxx = "1.0.119"
+cxxerror = { version = "0.1.0", path = "../../../scm/lib/edenfs_ffi/cxxerror" }
+fbinit = { version = "0.2.0", git = "https://github.com/facebookexperimental/rust-shed.git", branch = "main" }

eden/fs/rust/manifold_ffi/src/lib.rs

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This software may be used and distributed according to the terms of the
+ * GNU General Public License version 2.
+ */
+
+use anyhow::Context;
+use corpmanifold::manifold::ManifoldClient;
+use corpmanifold::manifold::RequestContext;
+use cxxerror::Result;
+
+#[cxx::bridge(namespace = "facebook::eden")]
+mod ffi {
+    extern "Rust" {
+        /// Upload content to a Manifold bucket.
+        fn manifold_write(
+            bucket: &str,
+            api_key: &str,
+            key: &str,
+            content: &[u8],
+            timeout_msec: i32,
+            expiration_secs: u32,
+            client_identity: &str,
+        ) -> Result<()>;
+    }
+}
+
+fn manifold_write(
+    bucket: &str,
+    api_key: &str,
+    key: &str,
+    content: &[u8],
+    timeout_msec: i32,
+    expiration_secs: u32,
+    client_identity: &str,
+) -> Result<()> {
+    let client = ManifoldClient::new(
+        unsafe { fbinit::assume_init() },
+        client_identity,
+        RequestContext {
+            bucket_name: bucket.to_owned(),
+            api_key: api_key.to_owned(),
+            timeout_msec,
+        },
+    )
+    .with_context(|| format!("Failed to create Manifold client for bucket {}", bucket))?;
+
+    client
+        .write(key.to_owned(), content.to_vec(), expiration_secs)
+        .with_context(|| format!("Failed to write key {} to Manifold bucket {}", key, bucket))?;
+
+    Ok(())
+}