An example Rust build
Change-Id: I7387a1f792fd79b7b1fd761395f6d7020a14cd0b
Reviewed-on: https://gn-review.googlesource.com/c/gn/+/4886
Commit-Queue: Julie Hockett <juliehockett@google.com>
Reviewed-by: Brett Wilson <brettw@google.com>
diff --git a/tools/gn/rust_example/.gn b/tools/gn/rust_example/.gn
new file mode 100644
index 0000000..9fe0b42
--- /dev/null
+++ b/tools/gn/rust_example/.gn
@@ -0,0 +1 @@
+buildconfig = "//BUILDCONFIG.gn"
diff --git a/tools/gn/rust_example/BUILD.gn b/tools/gn/rust_example/BUILD.gn
new file mode 100644
index 0000000..e28f023
--- /dev/null
+++ b/tools/gn/rust_example/BUILD.gn
@@ -0,0 +1,5 @@
+group("default") {
+ deps = [
+ "//hello_world/src:hello_world",
+ ]
+}
diff --git a/tools/gn/rust_example/BUILDCONFIG.gn b/tools/gn/rust_example/BUILDCONFIG.gn
new file mode 100644
index 0000000..62b5bb6
--- /dev/null
+++ b/tools/gn/rust_example/BUILDCONFIG.gn
@@ -0,0 +1,23 @@
+if (target_os == "") {
+ target_os = host_os
+}
+if (target_cpu == "") {
+ target_cpu = host_cpu
+}
+if (current_cpu == "") {
+ current_cpu = target_cpu
+}
+if (current_os == "") {
+ current_os = target_os
+}
+
+_configs = [ "//build:rust_defaults" ]
+
+set_defaults("executable") {
+ configs = _configs
+}
+set_defaults("rust_library") {
+ configs = _configs
+}
+
+set_default_toolchain("//build:rust")
diff --git a/tools/gn/rust_example/README.txt b/tools/gn/rust_example/README.txt
new file mode 100644
index 0000000..8bfbdd0
--- /dev/null
+++ b/tools/gn/rust_example/README.txt
@@ -0,0 +1,4 @@
+This is an example directory structure that compiles some simple targets using
+gcc. It is intended to show how to set up a simple Rust GN build.
+
+Don't miss the ".gn" file in this directory!
diff --git a/tools/gn/rust_example/build/BUILD.gn b/tools/gn/rust_example/build/BUILD.gn
new file mode 100644
index 0000000..e4aecfd
--- /dev/null
+++ b/tools/gn/rust_example/build/BUILD.gn
@@ -0,0 +1,27 @@
+toolchain("rust") {
+ outfile = "{{target_out_dir}}/{{rustc_output_prefix}}{{crate_name}}{{rustc_output_extension}}"
+ tool("rustc") {
+ depfile = "{{target_out_dir}}/{{crate_name}}.d"
+ command = "rustc --edition={{edition}} --crate-name {{crate_name}} {{source}} --crate-type {{crate_type}} --emit=dep-info=$depfile,link {{rustflags}} -o $outfile {{rustdeps}} {{externs}}"
+ description = "RUST $outfile"
+ cdylib_output_extension = ".so"
+ proc_macro_output_extension = ".so"
+ outputs = [
+ outfile,
+ ]
+ }
+
+ tool("stamp") {
+ command = "touch {{output}}"
+ description = "STAMP {{output}}"
+ }
+
+ tool("copy") {
+ command = "cp -af {{source}} {{output}}"
+ description = "COPY {{source}} {{output}}"
+ }
+}
+
+config("rust_defaults") {
+ rustflags = [ "-Cdebuginfo=2" ]
+}
diff --git a/tools/gn/rust_example/hello_world/bar/src/BUILD.gn b/tools/gn/rust_example/hello_world/bar/src/BUILD.gn
new file mode 100644
index 0000000..49c6eee
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/bar/src/BUILD.gn
@@ -0,0 +1,4 @@
+rust_library("bar") {
+ crate_root = "lib.rs"
+ edition = "2018"
+}
diff --git a/tools/gn/rust_example/hello_world/bar/src/lib.rs b/tools/gn/rust_example/hello_world/bar/src/lib.rs
new file mode 100644
index 0000000..43defe9
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/bar/src/lib.rs
@@ -0,0 +1,23 @@
+#[cfg(test)]
+mod tests {
+ #[test]
+ fn it_works() {
+ assert_eq!(2 + 2, 4);
+ }
+}
+
+#[derive(Debug)]
+pub struct Foo {
+ s: &'static str,
+ i: &'static str
+}
+
+impl Foo {
+ pub fn new(s: &'static str) -> Foo {
+ Foo{s: s, i: "bar"}
+ }
+}
+
+pub fn answer() -> i32 {
+ 42
+}
\ No newline at end of file
diff --git a/tools/gn/rust_example/hello_world/foo/src/BUILD.gn b/tools/gn/rust_example/hello_world/foo/src/BUILD.gn
new file mode 100644
index 0000000..61ee1f3
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/foo/src/BUILD.gn
@@ -0,0 +1,9 @@
+rust_library("foo") {
+ sources = [
+ "lib.rs",
+ ]
+ edition = "2018"
+ deps = [
+ "//hello_world/bar/src:bar",
+ ]
+}
diff --git a/tools/gn/rust_example/hello_world/foo/src/lib.rs b/tools/gn/rust_example/hello_world/foo/src/lib.rs
new file mode 100644
index 0000000..73c615c
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/foo/src/lib.rs
@@ -0,0 +1,11 @@
+#[derive(Debug)]
+pub struct Foo {
+ s: &'static str,
+ i: &'static str
+}
+
+impl Foo {
+ pub fn new(s: &'static str) -> Foo {
+ Foo{s: s, i: "foo"}
+ }
+}
\ No newline at end of file
diff --git a/tools/gn/rust_example/hello_world/src/BUILD.gn b/tools/gn/rust_example/hello_world/src/BUILD.gn
new file mode 100644
index 0000000..d6a0a66
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/src/BUILD.gn
@@ -0,0 +1,12 @@
+executable("hello_world") {
+ sources = [
+ "main.rs",
+ ]
+ deps = [
+ "//hello_world/foo/src:foo",
+ ]
+ edition = "2018"
+ aliased_deps = {
+ baz = "//hello_world/foo/src:foo"
+ }
+}
diff --git a/tools/gn/rust_example/hello_world/src/main.rs b/tools/gn/rust_example/hello_world/src/main.rs
new file mode 100644
index 0000000..ad70a12
--- /dev/null
+++ b/tools/gn/rust_example/hello_world/src/main.rs
@@ -0,0 +1,5 @@
+fn main() {
+ let f = baz::Foo::new("hello");
+ println!("Hello world!");
+ println!("I'm from a dependency: {:?}!", f);
+}
\ No newline at end of file
