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