Merge commit '0f6aab9da6fe982218a01f4a5b896e65fcced437' as 'third_party/flatbuffers'

third_party/flatbuffers/tests/rust_usage_test/outdir/.gitignore

@@ -0,0 +1 @@
+src/generated

third_party/flatbuffers/tests/rust_usage_test/outdir/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "outdir"
+version = "0.1.0"
+authors = ["Casper Neo <cneo@google.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+flatbuffers = { path = "../../../rust/flatbuffers" }
+serde = "1.0"

third_party/flatbuffers/tests/rust_usage_test/outdir/build.rs

@@ -0,0 +1,57 @@
+fn main() {
+    use std::process::Command;
+    let project_root = std::env::current_dir()
+        .unwrap()
+        .parent() // flatbuffers/tests/rust_usage test
+        .unwrap()
+        .parent() // flatbuffers/tests
+        .unwrap()
+        .parent() // flatbuffers/
+        .unwrap()
+        .to_path_buf();
+    let sample_schema = {
+        let mut s = project_root.to_path_buf();
+        s.push("samples");
+        s.push("monster.fbs");
+        s
+    };
+
+    let flatc = {
+        let mut f = project_root.to_path_buf();
+        f.push("flatc");
+        f
+    };
+
+    let out_dir = {
+        let mut d = std::path::Path::new(&std::env::var("OUT_DIR").unwrap()).to_path_buf();
+        d.push("flatbuffers");
+        d
+    };
+
+    Command::new(&flatc)
+        .arg("-o")
+        .arg(&out_dir)
+        .arg("--rust")
+        .arg("--rust-module-root-file")
+        .arg(&sample_schema)
+        .output()
+        .expect("Failed to generate file");
+
+    assert!(out_dir.exists());
+
+    let generated = std::path::Path::new("src/generated");
+    #[cfg(target_os = "windows")]
+    {
+        if generated.exists() {
+            std::fs::remove_dir(generated).unwrap();
+        }
+        std::os::windows::fs::symlink_dir(out_dir, generated).unwrap();
+    }
+    #[cfg(not(target_os = "windows"))]
+    {
+        if generated.exists() {
+            std::fs::remove_file(generated).unwrap();
+        }
+        std::os::unix::fs::symlink(out_dir, generated).unwrap();
+    }
+}

third_party/flatbuffers/tests/rust_usage_test/outdir/src/main.rs

@@ -0,0 +1,29 @@
+// In this example, a build.rs file generates the code and then copies it into generated/
+extern crate flatbuffers;
+#[allow(unused_imports, dead_code)]
+mod generated;
+use generated::my_game::sample::{Monster, MonsterArgs};
+
+fn main() {
+    let mut fbb = flatbuffers::FlatBufferBuilder::new();
+    let name = Some(fbb.create_string("bob"));
+    let m = Monster::create(
+        &mut fbb,
+        &MonsterArgs {
+            hp: 1,
+            mana: 2,
+            name,
+            ..Default::default()
+        },
+    );
+    fbb.finish(m, None);
+    let mon = flatbuffers::root::<Monster>(fbb.finished_data()).unwrap();
+    assert_eq!(mon.hp(), 1);
+    assert_eq!(mon.mana(), 2);
+    assert_eq!(mon.name().unwrap(), "bob");
+}
+
+#[test]
+fn test_main() {
+    main()
+}