refactor build infrastructure for single rust binary

Makefile.am

@@ -26,8 +26,7 @@ TESTING_TOR_BINARY=$(top_builddir)/src/or/tor$(EXEEXT)
 endif
 
 if USE_RUST
-rust_ldadd=$(top_builddir)/src/rust/target/release/@TOR_RUST_UTIL_STATIC_NAME@
-rust_ldadd+=$(top_builddir)/src/rust/target/release/@TOR_RUST_PROTOVER_STATIC_NAME@
+rust_ldadd=$(top_builddir)/src/rust/target/release/@TOR_RUST_STATIC_NAME@
 else
 rust_ldadd=
 endif

configure.ac

@@ -439,16 +439,12 @@ if test "x$enable_rust" = "xyes"; then
   dnl For now both MSVC and MinGW rust libraries will output static libs with
   dnl the MSVC naming convention.
   if test "$bwin32" = "true"; then
-    TOR_RUST_UTIL_STATIC_NAME=tor_util.lib
-    TOR_RUST_PROTOVER_STATIC_NAME=libprotover.lib
+    TOR_RUST_STATIC_NAME=tor_rust.lib
   else
-    TOR_RUST_UTIL_STATIC_NAME=libtor_util.a
-    TOR_RUST_PROTOVER_STATIC_NAME=libprotover.a
+    TOR_RUST_STATIC_NAME=libtor_rust.a
   fi
 
-  AC_SUBST(TOR_RUST_UTIL_STATIC_NAME)
-  AC_SUBST(TOR_RUST_PROTOVER_STATIC_NAME)
-  AC_SUBST(TOR_RUST_C_STRING_STATIC_NAME)
+  AC_SUBST(TOR_RUST_STATIC_NAME)
   AC_SUBST(CARGO_ONLINE)
   AC_SUBST(RUST_DL)
 

src/rust/Cargo.lock

@@ -42,5 +42,13 @@ dependencies = [
  "libc 0.2.22 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "tor_rust"
+version = "0.1.0"
+dependencies = [
+ "protover 0.0.1",
+ "tor_util 0.0.1",
+]
+
 [metadata]
 "checksum libc 0.2.22 (registry+https://github.com/rust-lang/crates.io-index)" = "babb8281da88cba992fa1f4ddec7d63ed96280a1a53ec9b919fd37b53d71e502"

src/rust/Cargo.toml

 [workspace]
-members = ["tor_util", "protover", "smartlist", "external", "tor_allocate"]
+members = ["tor_util", "protover", "smartlist", "external", "tor_allocate", "tor_rust"]
 
 [profile.release]
 debug = true

src/rust/include.am

-include src/rust/tor_util/include.am
-include src/rust/protover/include.am
+include src/rust/tor_rust/include.am
 
 EXTRA_DIST +=\
 	src/rust/Cargo.toml \

src/rust/tor_rust/Cargo.toml

+[package]
+authors = ["The Tor Project"]
+name = "tor_rust"
+version = "0.1.0"
+
+[lib]
+name = "tor_rust"
+path = "lib.rs"
+crate_type = ["rlib", "staticlib"]
+
+[dependencies.tor_util]
+path = "../tor_util"
+
+[dependencies.protover]
+path = "../protover"
+

src/rust/tor_util/include.am → src/rust/tor_rust/include.am

 EXTRA_DIST +=\
-	src/rust/tor_util/Cargo.toml \
-	src/rust/tor_util/lib.rs \
-	src/rust/tor_util/ffi.rs \
-	src/rust/tor_util/rust_string.rs
+	src/rust/tor_rust/Cargo.toml \
+	src/rust/tor_rust/lib.rs \
+	src/rust/tor_rust/tor_rust.rs
 
-src/rust/target/release/@TOR_RUST_UTIL_STATIC_NAME@: FORCE
-	( cd "$(abs_top_srcdir)/src/rust/tor_util" ; \
+src/rust/target/release/@TOR_RUST_STATIC_NAME@: FORCE
+	( cd "$(abs_top_srcdir)/src/rust/tor_rust" ; \
 		CARGO_TARGET_DIR="$(abs_top_builddir)/src/rust/target" \
 		CARGO_HOME="$(abs_top_builddir)/src/rust" \
 		$(CARGO) build --release --quiet $(CARGO_ONLINE) )

src/rust/tor_rust/lib.rs

+extern crate tor_util;
+extern crate protover;
+
+pub use tor_util::*;
+pub use protover::*;