extern crate pkg_config;
use std::env;
use std::fs::{self, File};
use std::io::ErrorKind;
use std::io::prelude::*;
use std::path::{Path, PathBuf};
use std::process::Command;
macro_rules! t {
($e:expr) => (match $e {
Ok(n) => n,
Err(e) => fail(&format!("\n{} failed with {}\n", stringify!($e), e)),
})
}
fn main() {
register_dep("SSH2");
register_dep("OPENSSL");
let has_pkgconfig = Command::new("pkg-config").output().is_ok();
if env::var("LIBGIT2_SYS_USE_PKG_CONFIG").is_ok() {
if pkg_config::find_library("libgit2").is_ok() {
return
}
}
let mut cflags = env::var("CFLAGS").unwrap_or(String::new());
let target = env::var("TARGET").unwrap();
let windows = target.contains("windows");
let mingw = target.contains("windows-gnu");
let msvc = target.contains("msvc");
if msvc {
cflags.push_str(" /GL-");
} else {
cflags.push_str(" -ffunction-sections -fdata-sections");
if target.contains("i686") {
cflags.push_str(" -m32");
} else if target.contains("x86_64") {
cflags.push_str(" -m64");
}
if !target.contains("i686") {
cflags.push_str(" -fPIC");
}
}
if windows || !has_pkgconfig {
if msvc {
cflags.push_str(" /DGIT_SSH");
} else {
cflags.push_str(" -DGIT_SSH");
}
if let Ok(libssh2_include) = env::var("DEP_SSH2_INCLUDE") {
if msvc {
cflags.push_str(&format!(" /I{}", libssh2_include));
} else {
cflags.push_str(&format!(" -I{}", libssh2_include));
}
}
}
let src = PathBuf::from(&env::var("CARGO_MANIFEST_DIR").unwrap());
let dst = PathBuf::from(&env::var("OUT_DIR").unwrap());
let _ = fs::create_dir(&dst.join("build"));
let mut cmd = Command::new("cmake");
cmd.arg(&src.join("libgit2"))
.current_dir(&dst.join("build"));
if mingw {
cmd.arg("-G").arg("Unix Makefiles");
} else if msvc {
if target.contains("i686") {
cmd.arg("-G").arg("Visual Studio 12 2013");
} else if target.contains("x86_64") {
cmd.arg("-G").arg("Visual Studio 12 2013 Win64");
} else {
panic!("unsupported msvc target: {}", target);
}
cmd.arg("-DSTATIC_CRT=OFF");
}
let profile = match &env::var("PROFILE").unwrap()[..] {
"bench" | "release" => "Release",
_ if msvc => "Release", _ => "Debug",
};
run(cmd.arg("-DBUILD_SHARED_LIBS=OFF")
.arg("-DBUILD_CLAR=OFF")
.arg("-DCURL=OFF")
.arg(&format!("-DCMAKE_BUILD_TYPE={}", profile))
.arg(&format!("-DCMAKE_INSTALL_PREFIX={}", dst.display()))
.arg(&format!("-DCMAKE_C_FLAGS={}", cflags)), "cmake");
let flags = dst.join("build/CMakeFiles/git2.dir/flags.make");
let mut contents = String::new();
if !msvc {
t!(t!(File::open(flags)).read_to_string(&mut contents));
if !contents.contains("-DGIT_SSH") {
fail("libgit2 failed to find libssh2, and SSH support is required");
}
}
run(Command::new("cmake")
.arg("--build").arg(".")
.arg("--target").arg("install")
.arg("--config").arg(profile)
.current_dir(&dst.join("build")), "cmake");
println!("cargo:root={}", dst.display());
if target.contains("windows") {
println!("cargo:rustc-link-lib=winhttp");
println!("cargo:rustc-link-lib=rpcrt4");
println!("cargo:rustc-link-lib=ole32");
println!("cargo:rustc-link-lib=crypt32");
println!("cargo:rustc-link-lib=static=git2");
println!("cargo:rustc-link-search=native={}/lib", dst.display());
return
}
if env::var("HOST") == env::var("TARGET") {
prepend("PKG_CONFIG_PATH", dst.join("lib/pkgconfig"));
if pkg_config::Config::new().statik(true).find("libgit2").is_ok() {
return
}
}
println!("cargo:rustc-link-lib=static=git2");
println!("cargo:rustc-link-search=native={}", dst.join("lib").display());
if target.contains("apple") {
println!("cargo:rustc-link-lib=iconv");
}
}
fn run(cmd: &mut Command, program: &str) {
println!("running: {:?}", cmd);
let status = match cmd.status() {
Ok(status) => status,
Err(ref e) if e.kind() == ErrorKind::NotFound => {
fail(&format!("failed to execute command: {}\nis `{}` not installed?",
e, program));
}
Err(e) => fail(&format!("failed to execute command: {}", e)),
};
if !status.success() {
fail(&format!("command did not execute successfully, got: {}", status));
}
}
fn register_dep(dep: &str) {
match env::var(&format!("DEP_{}_ROOT", dep)) {
Ok(s) => {
prepend("CMAKE_PREFIX_PATH", PathBuf::from(&s));
prepend("PKG_CONFIG_PATH", Path::new(&s).join("lib/pkgconfig"));
}
Err(..) => {}
}
}
fn prepend(var: &str, val: PathBuf) {
let prefix = env::var(var).unwrap_or(String::new());
let mut v = vec![val];
v.extend(env::split_paths(&prefix));
env::set_var(var, &env::join_paths(v).unwrap());
}
fn fail(s: &str) -> ! {
panic!("\n{}\n\nbuild script failed, must exit now", s)
}