Vendor things

third-party/vendor/clang-sys/tests/build.rs

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+#![allow(dead_code)]
+
+extern crate glob;
+extern crate serial_test;
+extern crate tempfile;
+
+use std::collections::HashMap;
+use std::env;
+use std::fs;
+use std::path::PathBuf;
+use std::sync::Arc;
+use std::sync::Mutex;
+
+use serial_test::serial;
+use tempfile::TempDir;
+
+#[macro_use]
+#[path = "../build/macros.rs"]
+mod macros;
+
+#[path = "../build/common.rs"]
+mod common;
+#[path = "../build/dynamic.rs"]
+mod dynamic;
+#[path = "../build/static.rs"]
+mod r#static;
+
+#[derive(Debug, Default)]
+struct RunCommandMock {
+    invocations: Vec<(String, String, Vec<String>)>,
+    responses: HashMap<Vec<String>, String>,
+}
+
+#[derive(Debug)]
+struct Env {
+    os: String,
+    pointer_width: String,
+    env: Option<String>,
+    vars: HashMap<String, (Option<String>, Option<String>)>,
+    cwd: PathBuf,
+    tmp: TempDir,
+    files: Vec<String>,
+    commands: Arc<Mutex<RunCommandMock>>,
+}
+
+impl Env {
+    fn new(os: &str, pointer_width: &str) -> Self {
+        Env {
+            os: os.into(),
+            pointer_width: pointer_width.into(),
+            env: None,
+            vars: HashMap::new(),
+            cwd: env::current_dir().unwrap(),
+            tmp: tempfile::Builder::new().prefix("clang_sys_test").tempdir().unwrap(),
+            files: vec![],
+            commands: Default::default(),
+        }
+        .var("CLANG_PATH", None)
+        .var("LD_LIBRARY_PATH", None)
+        .var("LIBCLANG_PATH", None)
+        .var("LIBCLANG_STATIC_PATH", None)
+        .var("LLVM_CONFIG_PATH", None)
+        .var("PATH", None)
+    }
+
+    fn env(mut self, env: &str) -> Self {
+        self.env = Some(env.into());
+        self
+    }
+
+    fn var(mut self, name: &str, value: Option<&str>) -> Self {
+        let previous = env::var(name).ok();
+        self.vars.insert(name.into(), (value.map(|v| v.into()), previous));
+        self
+    }
+
+    fn dir(mut self, path: &str) -> Self {
+        self.files.push(path.into());
+        let path = self.tmp.path().join(path);
+        fs::create_dir_all(path).unwrap();
+        self
+    }
+
+    fn file(mut self, path: &str, contents: &[u8]) -> Self {
+        self.files.push(path.into());
+        let path = self.tmp.path().join(path);
+        fs::create_dir_all(path.parent().unwrap()).unwrap();
+        fs::write(self.tmp.path().join(path), contents).unwrap();
+        self
+    }
+
+    fn dll(self, path: &str, pointer_width: &str) -> Self {
+        // PE header.
+        let mut contents = [0; 64];
+        contents[0x3C..0x3C + 4].copy_from_slice(&i32::to_le_bytes(10));
+        contents[10..14].copy_from_slice(&[b'P', b'E', 0, 0]);
+        let magic = if pointer_width == "64" { 523 } else { 267 };
+        contents[34..36].copy_from_slice(&u16::to_le_bytes(magic));
+
+        self.file(path, &contents)
+    }
+
+    fn so(self, path: &str, pointer_width: &str) -> Self {
+        // ELF header.
+        let class = if pointer_width == "64" { 2 } else { 1 };
+        let contents = [127, 69, 76, 70, class];
+
+        self.file(path, &contents)
+    }
+
+    fn command(self, command: &str, args: &[&str], response: &str) -> Self {
+        let command = command.to_string();
+        let args = args.iter().map(|a| a.to_string()).collect::<Vec<_>>();
+
+        let mut key = vec![command];
+        key.extend(args);
+        self.commands.lock().unwrap().responses.insert(key, response.into());
+
+        self
+    }
+
+    fn enable(self) -> Self {
+        env::set_var("_CLANG_SYS_TEST", "yep");
+        env::set_var("_CLANG_SYS_TEST_OS", &self.os);
+        env::set_var("_CLANG_SYS_TEST_POINTER_WIDTH", &self.pointer_width);
+        if let Some(env) = &self.env {
+            env::set_var("_CLANG_SYS_TEST_ENV", env);
+        }
+
+        for (name, (value, _)) in &self.vars {
+            if let Some(value) = value {
+                env::set_var(name, value);
+            } else {
+                env::remove_var(name);
+            }
+        }
+
+        env::set_current_dir(&self.tmp).unwrap();
+
+        let commands = self.commands.clone();
+        let mock = &mut *common::RUN_COMMAND_MOCK.lock().unwrap();
+        *mock = Some(Box::new(move |command, path, args| {
+            let command = command.to_string();
+            let path = path.to_string();
+            let args = args.iter().map(|a| a.to_string()).collect::<Vec<_>>();
+
+            let mut commands = commands.lock().unwrap();
+            commands.invocations.push((command.clone(), path, args.clone()));
+
+            let mut key = vec![command];
+            key.extend(args);
+            commands.responses.get(&key).cloned()
+        }));
+
+        self
+    }
+}
+
+impl Drop for Env {
+    fn drop(&mut self) {
+        env::remove_var("_CLANG_SYS_TEST");
+        env::remove_var("_CLANG_SYS_TEST_OS");
+        env::remove_var("_CLANG_SYS_TEST_POINTER_WIDTH");
+        env::remove_var("_CLANG_SYS_TEST_ENV");
+
+        for (name, (_, previous)) in &self.vars {
+            if let Some(previous) = previous {
+                env::set_var(name, previous);
+            } else {
+                env::remove_var(name);
+            }
+        }
+
+        if let Err(error) = env::set_current_dir(&self.cwd) {
+            println!("Failed to reset working directory: {:?}", error);
+        }
+    }
+}
+
+//================================================
+// Dynamic
+//================================================
+
+// Linux -----------------------------------------
+
+#[test]
+#[serial]
+fn test_linux_directory_preference() {
+    let _env = Env::new("linux", "64")
+        .so("usr/lib/libclang.so.1", "64")
+        .so("usr/local/lib/libclang.so.1", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("usr/local/lib".into(), "libclang.so.1".into())),
+    );
+}
+
+#[test]
+#[serial]
+fn test_linux_version_preference() {
+    let _env = Env::new("linux", "64")
+        .so("usr/lib/libclang-3.so", "64")
+        .so("usr/lib/libclang-3.5.so", "64")
+        .so("usr/lib/libclang-3.5.0.so", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("usr/lib".into(), "libclang-3.5.0.so".into())),
+    );
+}
+
+#[test]
+#[serial]
+fn test_linux_directory_and_version_preference() {
+    let _env = Env::new("linux", "64")
+        .so("usr/local/llvm/lib/libclang-3.so", "64")
+        .so("usr/local/lib/libclang-3.5.so", "64")
+        .so("usr/lib/libclang-3.5.0.so", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("usr/lib".into(), "libclang-3.5.0.so".into())),
+    );
+}
+
+// Windows ---------------------------------------
+
+#[cfg(target_os = "windows")]
+#[test]
+#[serial]
+fn test_windows_bin_sibling() {
+    let _env = Env::new("windows", "64")
+        .dir("Program Files\\LLVM\\lib")
+        .dll("Program Files\\LLVM\\bin\\libclang.dll", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("Program Files\\LLVM\\bin".into(), "libclang.dll".into())),
+    );
+}
+
+#[cfg(target_os = "windows")]
+#[test]
+#[serial]
+fn test_windows_mingw_gnu() {
+    let _env = Env::new("windows", "64")
+        .env("gnu")
+        .dir("MSYS\\MinGW\\lib")
+        .dll("MSYS\\MinGW\\bin\\clang.dll", "64")
+        .dir("Program Files\\LLVM\\lib")
+        .dll("Program Files\\LLVM\\bin\\libclang.dll", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("MSYS\\MinGW\\bin".into(), "clang.dll".into())),
+    );
+}
+
+#[cfg(target_os = "windows")]
+#[test]
+#[serial]
+fn test_windows_mingw_msvc() {
+    let _env = Env::new("windows", "64")
+        .env("msvc")
+        .dir("MSYS\\MinGW\\lib")
+        .dll("MSYS\\MinGW\\bin\\clang.dll", "64")
+        .dir("Program Files\\LLVM\\lib")
+        .dll("Program Files\\LLVM\\bin\\libclang.dll", "64")
+        .enable();
+
+    assert_eq!(
+        dynamic::find(true),
+        Ok(("Program Files\\LLVM\\bin".into(), "libclang.dll".into())),
+    );
+}