1 // Copyright 2020 The Bazel Authors. All rights reserved. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 use std::env; 15 use std::fs::File; 16 use std::io::prelude::*; 17 main()18fn main() { 19 let bleh = env::var("CARGO_FEATURE_BLEH").unwrap(); 20 let some_env = env::var("SOME_ENV").unwrap(); 21 let out_dir = env::var("OUT_DIR").unwrap(); 22 let data = std::fs::read("test.txt").unwrap(); 23 assert!(!bleh.is_empty()); 24 assert_eq!(some_env, "42"); 25 println!( 26 r#"cargo:rustc-env=FOO=BAR 27 cargo:rustc-env=BAR=FOO 28 cargo:rustc-flags=--cfg=blah="bleh" 29 cargo:rustc-flags=--cfg=data="{}" 30 cargo:rustc-cfg=foobar"#, 31 std::str::from_utf8(&data).unwrap() 32 ); 33 let mut file = File::create(format!("{}/hello.world.txt", out_dir)).unwrap(); 34 file.write_all(b"Hello, world!").unwrap(); 35 } 36