Patch-Source: https://github.com/rustic-rs/rustic_core/pull/110 (backported)
--
From a5360816832236b814da86cd8518c02b3fc3eb05 Mon Sep 17 00:00:00 2001
From: Jakub Jirutka <jakub@jirutka.cz>
Date: Sat, 30 Dec 2023 20:28:47 +0100
Subject: [PATCH] feat: Add tls-native, tls-rustls features to allow building
 w/o Rustls

diff --git a/Cargo.toml b/Cargo.toml
index 1582c6b..4d60eef 100644
--- a/vendor/rustic_core/Cargo.toml
+++ b/vendor/rustic_core/Cargo.toml
@@ -35,10 +35,13 @@ harness = true
 edition = "2021"

 [features]
-default = []
+default = ["tls-rustls"]
 cli = ["merge", "clap"]
 merge = ["dep:merge"]
 clap = ["dep:clap"]
+# tls-native and tls-rustls are mutually exclusive.
+tls-native = ["reqwest/native-tls"]
+tls-rustls = ["reqwest/rustls-tls-native-roots"]

 [package.metadata.docs.rs]
 all-features = true
@@ -96,7 +99,7 @@ walkdir = "2.4.0"

 # rest backend
 backoff = "0.4.0"
-reqwest = { version = "0.11.22", default-features = false, features = ["json", "rustls-tls-native-roots", "stream", "blocking"] }
+reqwest = { version = "0.11.22", default-features = false, features = ["json", "stream", "blocking"] }
 url = "2.4.1"

 # rclone backend
diff --git a/src/lib.rs b/src/lib.rs
index 04bda03..387b218 100644
--- a/vendor/rustic_core/src/lib.rs
+++ b/vendor/rustic_core/src/lib.rs
@@ -139,6 +139,9 @@ This crate exposes a few features for controlling dependency usage.
 #![allow(rustdoc::private_intra_doc_links)]
 #![allow(clippy::needless_raw_string_hashes)]

+#[cfg(all(feature = "tls-native", feature = "tls-rustls"))]
+compile_error!("features \"tls-native\" and \"tls-rustls\" cannot be enabled at the same time. Please disable one of them.");
+
 pub(crate) mod archiver;
 pub(crate) mod backend;
 pub(crate) mod blob;
--
2.43.0