Add a couple of dummy mozilla-central crates to assist with the monor…

Cargo.toml

@@ -69,6 +69,9 @@ members = [
     "examples/*/",
     "testing/separated/*/",
     "testing/sync-test",
+
+    "monorepo-hacks/workspace-hack",
+    "monorepo-hacks/mozbuild",
 ]
 
 exclude = [
@@ -159,3 +162,8 @@ lto = "thin"
 uniffi = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "59b035078322fbc0a605cc3c784cc38214113450" }
 uniffi_bindgen = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "59b035078322fbc0a605cc3c784cc38214113450" }
 uniffi_pipeline = { git = "https://github.com/mozilla/uniffi-rs.git", rev = "59b035078322fbc0a605cc3c784cc38214113450" }
+# dummy crates for m-c integration hacks.
+mozilla-central-workspace-hack = { path = "monorepo-hacks/workspace-hack" }
+mozbuild = { path = "monorepo-hacks/mozbuild" }
+# temporary ohttp override enabling the above hacks while we wait for a new version.
+ohttp = { git = "https://github.com/martinthomson/ohttp", revision = "324f876e79394c9b815dcacda3fd4f48f105fdf2" }

components/support/nimbus-fml/Cargo.toml

@@ -52,3 +52,4 @@ itertools = "0"
 regex = "1.9"
 viaduct = { path = "../../viaduct/" }
 termcolor = "1.4.1"
+mozilla-central-workspace-hack = { version = "0.1", features = ["nimbus-fml"], optional = true }

megazords/full/Cargo.toml

@@ -33,3 +33,4 @@ init_rust_components = { path = "../../components/init_rust_components" }
 merino = { path = "../../components/merino" }
 relay = { path = "../../components/relay" }
 ads-client = { path = "../../components/ads-client" }
+mozilla-central-workspace-hack = { version = "0.1", features = ["megazord"], optional = true }

monorepo-hacks/README.md

@@ -0,0 +1,15 @@
+This directory holds a couple of crates which are hacks to help us on the
+path to moving this repo into mozilla-central.
+
+They exist only to keep Cargo and/or the Rust compiler happy, so the
+same code/config can be used in both repos. They serve no actual purpose
+and are never actually called in this repo.
+
+They are:
+
+* workspace-hack/* contains a dummy `mozilla-central-workspace-hack` crate, which
+  is referenced from a few "top-level" crates built in m-c.
+
+* mozbuild/* contains a dummy `mozbuild` crate, which is referenced by the ohttp
+  crate when the "app-svc" feature is enabled. That feature auto-detects whether
+  it is in this repo or in mozilla-central.

monorepo-hacks/mozbuild/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "mozbuild"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

monorepo-hacks/mozbuild/src/lib.rs

@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// A dummy mozbuild which exists purely so ohttp can be built in this repo.
+// This implementation is never actually called, it just needs to exist
+// to keep the compiler happy.
+
+use std::path::Path;
+
+// from https://searchfox.org/firefox-main/source/build/rust/mozbuild/lib.rs
+
+// Path::new is not const at the moment. This is a non-generic version
+// of Path::new, similar to libstd's implementation of Path::new.
+#[inline(always)]
+const fn const_path(s: &'static str) -> &'static std::path::Path {
+    unsafe { &*(s as *const str as *const std::path::Path) }
+}
+
+pub const TOPOBJDIR: &Path = const_path("");
+
+pub mod config {
+    pub const MOZ_FOLD_LIBS: bool = true;
+    pub const BINDGEN_SYSTEM_FLAGS: [&str; 0] = [];
+    pub const NSS_CFLAGS: [&str; 0] = [];
+    pub const NSPR_CFLAGS: [&str; 0] = [];
+}

monorepo-hacks/workspace-hack/Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "mozilla-central-workspace-hack"
+version = "0.1.0"
+license = "MPL-2.0"
+description = "Workspace hack for mozilla-central"
+edition = "2024"
+
+# This is a copy of the workspace hack in mozilla-central - https://searchfox.org/firefox-main/source/build/workspace-hack
+# It exists only so that the crates in this repo which need the "workspace hack" once in mozilla-central
+# automagically get it.
+# It serves no purpose in application-services other than to allow our
+# crates to be build in mozilla-central without modification.
+
+[features]
+megazord = []
+embedded-uniffi-bindgen = []
+nimbus-fml = []

monorepo-hacks/workspace-hack/src/lib.rs

@@ -0,0 +1,11 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}

tools/embedded-uniffi-bindgen/Cargo.toml

@@ -17,3 +17,4 @@ clap = {version = "4.2", default-features = false, features = ["std", "derive"]}
 serde = { version = "1", features = ["derive"] }
 uniffi_bindgen = { version = "0.31" }
 uniffi_pipeline = { version = "0.31" }
+mozilla-central-workspace-hack = { version = "0.1", features = ["embedded-uniffi-bindgen"], optional = true }