Use native check-cfg lint in cargo beta

.github/workflows/build.yml

@@ -32,8 +32,6 @@ jobs:
         run: |
           rustup target add thumbv7m-none-eabi
           sudo apt-get -y install gcc-arm-none-eabi
-      - name: Check for unknown cfg tags
-        run: ci/check-cfg-flags.py
       - name: shellcheck the CI script
         if: "matrix.platform == 'ubuntu-latest'"
         run: |

Cargo.toml

@@ -42,3 +42,25 @@ panic = "abort"
 
 [patch.crates-io.possiblyrandom]
 path = "possiblyrandom"
+
+[workspace.lints.rust.unexpected_cfgs]
+level = "forbid"
+# When adding a new cfg attribute, ensure that it is added to this list.
+#
+# Note that Cargo automatically declares corresponding cfgs for every feature
+# defined in the member-level [features] tables as "expected".
+check-cfg = [
+    "cfg(fuzzing)",
+    "cfg(secp256k1_fuzz)",
+    "cfg(hashes_fuzz)",
+    "cfg(test)",
+    "cfg(debug_assertions)",
+    "cfg(c_bindings)",
+    "cfg(ldk_bench)",
+    "cfg(taproot)",
+    "cfg(async_signing)",
+    "cfg(require_route_graph_test)",
+    "cfg(dual_funding)",
+    "cfg(splicing)",
+    "cfg(async_payments)",
+]

lightning-background-processor/Cargo.toml

@@ -30,3 +30,6 @@ tokio = { version = "1.35", features = [ "macros", "rt", "rt-multi-thread", "syn
 lightning = { version = "0.0.123-beta", path = "../lightning", features = ["_test_utils"] }
 lightning-invoice = { version = "0.31.0-beta", path = "../lightning-invoice" }
 lightning-persister = { version = "0.0.123-beta", path = "../lightning-persister" }
+
+[lints]
+workspace = true

lightning-block-sync/Cargo.toml

@@ -28,3 +28,6 @@ chunked_transfer = { version = "1.4", optional = true }
 [dev-dependencies]
 lightning = { version = "0.0.123-beta", path = "../lightning", features = ["_test_utils"] }
 tokio = { version = "1.35", features = [ "macros", "rt" ] }
+
+[lints]
+workspace = true

lightning-custom-message/Cargo.toml

@@ -16,3 +16,6 @@ rustdoc-args = ["--cfg", "docsrs"]
 [dependencies]
 bitcoin = "0.31.2"
 lightning = { version = "0.0.123-beta", path = "../lightning" }
+
+[lints]
+workspace = true

lightning-invoice/Cargo.toml

@@ -18,6 +18,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 default = ["std"]
 no-std = ["lightning/no-std"]
 std = ["bitcoin/std", "lightning/std", "bech32/std"]
+strict = []
 
 [dependencies]
 bech32 = { version = "0.9.1", default-features = false }
@@ -31,3 +32,6 @@ lightning = { version = "0.0.123-beta", path = "../lightning", default-features
 hex = { package = "hex-conservative", version = "0.1.1", default-features = false }
 serde_json = { version = "1"}
 hashbrown = { version = "0.13", default-features = false }
+
+[lints]
+workspace = true

lightning-net-tokio/Cargo.toml

@@ -22,3 +22,6 @@ tokio = { version = "1.35", features = [ "rt", "sync", "net", "time" ] }
 [dev-dependencies]
 tokio = { version = "1.35", features = [ "macros", "rt", "rt-multi-thread", "sync", "net", "time" ] }
 lightning = { version = "0.0.123-beta", path = "../lightning", features = ["_test_utils"] }
+
+[lints]
+workspace = true

lightning-persister/Cargo.toml

@@ -26,3 +26,6 @@ criterion = { version = "0.4", optional = true, default-features = false }
 [dev-dependencies]
 lightning = { version = "0.0.123-beta", path = "../lightning", features = ["_test_utils"] }
 bitcoin = { version = "0.31.2", default-features = false }
+
+[lints]
+workspace = true

lightning-rapid-gossip-sync/Cargo.toml

@@ -23,3 +23,6 @@ criterion = { version = "0.4", optional = true, default-features = false }
 
 [dev-dependencies]
 lightning = { version = "0.0.123-beta", path = "../lightning", features = ["_test_utils"] }
+
+[lints]
+workspace = true

lightning-transaction-sync/Cargo.toml

@@ -39,3 +39,6 @@ electrsd = { version = "0.27.3", default-features = false, features = ["legacy",
 
 [target.'cfg(all(not(target_os = "windows"), no_download))'.dev-dependencies]
 electrsd = { version = "0.27.3", default-features = false, features = ["legacy"] }
+
+[lints]
+workspace = true

lightning/Cargo.toml

@@ -65,3 +65,6 @@ criterion = { version = "0.4", optional = true, default-features = false }
 
 [target.'cfg(taproot)'.dependencies]
 musig2 = { git = "https://github.com/arik-so/rust-musig2", rev = "739533fc" }
+
+[lints]
+workspace = true

possiblyrandom/Cargo.toml

@@ -19,3 +19,6 @@ getrandom = { version = "0.2", optional = true, default-features = false }
 # Enable getrandom if we are on a platform that (likely) supports it
 [target.'cfg(not(any(target_os = "unknown", target_os = "none")))'.dependencies]
 getrandom = { version = "0.2", default-features = false }
+
+[lints]
+workspace = true