| use std::io::{self, Write}; |
| #[cfg(windows)] |
| use std::os::windows::fs as windows; |
| use std::path::Path; |
| use std::process; |
| #[cfg(windows)] |
| use std::{env, fs}; |
| |
| const MISSING: &str = " |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| When building `cxx` from a git clone, git's symlink support needs |
| to be enabled on platforms that have it off by default (Windows). |
| Either use: |
| |
| $ git config --global core.symlinks true |
| |
| prior to cloning, or else use: |
| |
| $ git clone -c core.symlinks=true https://github.com/dtolnay/cxx |
| |
| for the clone. |
| |
| Symlinks are only required when compiling locally from a clone of |
| the git repository---they are NOT required when building `cxx` as |
| a Cargo-managed (possibly transitive) build dependency downloaded |
| through crates.io. |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| "; |
| |
| #[cfg(windows)] |
| const DENIED: &str = " |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| When building `cxx` from a git clone on Windows we need Developer |
| Mode enabled for symlink support. |
| |
| To enable Developer Mode: go under Settings to Update & Security, |
| then 'For developers', and turn on the toggle for Developer Mode. |
| |
| For more explanation of symlinks in Windows, see these resources: |
| > https://blogs.windows.com/windowsdeveloper/2016/12/02/symlinks-windows-10/ |
| > https://docs.microsoft.com/windows/uwp/get-started/enable-your-device-for-development |
| |
| Symlinks are only required when compiling locally from a clone of |
| the git repository---they are NOT required when building `cxx` as |
| a Cargo-managed (possibly transitive) build dependency downloaded |
| through crates.io. |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| "; |
| |
| fn main() { |
| if Path::new("src/syntax/mod.rs").exists() { |
| return; |
| } |
| |
| #[allow(unused_mut)] |
| let mut message = MISSING; |
| |
| #[cfg(windows)] |
| if let Some(out_dir) = env::var_os("OUT_DIR") { |
| let parent_dir = Path::new(&out_dir).join("symlink"); |
| let from_dir = parent_dir.join("from"); |
| let to_dir = parent_dir.join("to"); |
| if fs::create_dir_all(&from_dir).is_ok() |
| && fs::remove_dir(&to_dir).is_ok() |
| && windows::symlink_dir(&from_dir, &to_dir).is_err() |
| { |
| message = DENIED; |
| } |
| } |
| |
| let _ = io::stderr().write_all(message.as_bytes()); |
| process::exit(1); |
| } |