extern crate dirs;
extern crate fs_extra;
use std::error::Error;
use std::fmt;
#[allow(unused_imports)]
use std::fs::{File, OpenOptions};
use std::io::prelude::*;
use std::path::{Path, PathBuf};
use std::{env, fs};
use glob::glob;
use java_locator;
use sha2::{Digest, Sha256};
const VERSION: &'static str = "0.18.0-SNAPSHOT";
const JAVA_FX_VERSION: &'static str = "19.0.2.1";
fn main() -> Result<(), J4rsBuildError> {
let out_dir = env::var("OUT_DIR")?;
let source_jar_location = format!("../java/target/j4rs-{}-jar-with-dependencies.jar", VERSION);
if File::open(&source_jar_location).is_ok() {
println!("cargo:rerun-if-changed={}", source_jar_location);
}
let target_os_res = env::var("CARGO_CFG_TARGET_OS");
let target_os = target_os_res.as_ref().map(|x| &**x).unwrap_or("unknown");
if target_os == "android" {
generate_src(&out_dir)?;
return Ok(());
}
copy_jars_from_java(&source_jar_location)?;
let _ = copy_jars_to_exec_directory(&out_dir)?;
generate_src(&out_dir)?;
if cfg!(feature = "javafx") {
println!("cargo:warning=JAVAFX");
println!("cargo:rustc-env=J4RS_JAVAFX=TRUE")
}
Ok(())
}
fn generate_src(out_dir: &str) -> Result<(), J4rsBuildError> {
let dest_path = Path::new(&out_dir).join("j4rs_init.rs");
let mut f = File::create(&dest_path)?;
let contents = format!(
"
pub(crate) fn j4rs_version() -> &'static str {{
\"{}\"
}}
pub(crate) fn java_fx_version() -> &'static str {{
\"{}\"
}}
",
VERSION,
JAVA_FX_VERSION
);
f.write_all(contents.as_bytes())?;
Ok(())
}
fn copy_jars_from_java(jar_source_path: &str) -> Result<(), J4rsBuildError> {
if let Ok(mut source_jar_file) = File::open(&jar_source_path) {
let home = env::var("CARGO_MANIFEST_DIR")?;
let jassets_path_buf = Path::new(&home).join("jassets");
let jassets_path = jassets_path_buf.to_str().unwrap().to_owned();
let destination_jar_file_res = {
let djpb = Path::new(&jassets_path)
.join(format!("j4rs-{}-jar-with-dependencies.jar", VERSION));
File::open(djpb)
};
let do_copy = if destination_jar_file_res.is_ok() {
let mut destination_jar_file = destination_jar_file_res.unwrap();
!are_same_files(&mut source_jar_file, &mut destination_jar_file).unwrap_or(true)
} else {
true
};
if do_copy {
fs_extra::remove_items(vec![jassets_path.clone()].as_ref())?;
let _ = fs::create_dir_all(jassets_path_buf.clone())
.map_err(|error| panic!("Cannot create dir '{:?}': {:?}", jassets_path_buf, error));
let ref options = fs_extra::dir::CopyOptions::new();
let _ = fs_extra::copy_items(vec![jar_source_path].as_ref(), jassets_path, options)?;
}
}
Ok(())
}
fn are_same_files(f1: &mut File, f2: &mut File) -> Result<bool, J4rsBuildError> {
let mut buffer1: Vec<u8> = Vec::new();
let mut hasher1 = Sha256::new();
let mut buffer2: Vec<u8> = Vec::new();
let mut hasher2 = Sha256::new();
f1.read_to_end(&mut buffer1)?;
hasher1.update(&buffer1);
let hash1 = hasher1.finalize();
f2.read_to_end(&mut buffer2)?;
hasher2.update(&buffer2);
let hash2 = hasher2.finalize();
Ok(hash1 == hash2)
}
fn copy_jars_to_exec_directory(out_dir: &str) -> Result<PathBuf, J4rsBuildError> {
let mut exec_dir_path_buf = PathBuf::from(out_dir);
exec_dir_path_buf.pop();
exec_dir_path_buf.pop();
exec_dir_path_buf.pop();
let jassets_output = exec_dir_path_buf.clone();
let jassets_output_dir = jassets_output.to_str().unwrap();
let home = env::var("CARGO_MANIFEST_DIR")?;
let jassets_path_buf = Path::new(&home).join("jassets");
let jassets_path = jassets_path_buf.to_str().unwrap().to_owned();
let jassets_jar_file_res = {
let japb =
Path::new(&jassets_path).join(format!("j4rs-{}-jar-with-dependencies.jar", VERSION));
File::open(japb)
};
let jassets_output_file_res = {
let jaopb = Path::new(&jassets_output_dir)
.join("jassets")
.join(format!("j4rs-{}-jar-with-dependencies.jar", VERSION));
File::open(jaopb)
};
let do_copy = if jassets_jar_file_res.is_ok() && jassets_output_file_res.is_ok() {
let mut jassets_jar_file = jassets_jar_file_res.unwrap();
let mut jassets_output_jar_file = jassets_output_file_res.unwrap();
!are_same_files(&mut jassets_jar_file, &mut jassets_output_jar_file).unwrap_or(true)
} else {
true
};
if do_copy {
fs_extra::remove_items(vec![format!("{}/jassets", jassets_output_dir)].as_ref())?;
let ref options = fs_extra::dir::CopyOptions::new();
let _ = fs_extra::copy_items(vec![jassets_path].as_ref(), jassets_output_dir, options)?;
}
let jassets_output_files = glob(format!("{}/jassets/**/*", jassets_output_dir).as_str())?;
for glob_res in jassets_output_files {
println!("cargo:rerun-if-changed={}", glob_res?.to_str().unwrap());
}
Ok(exec_dir_path_buf)
}
#[derive(Debug)]
struct J4rsBuildError {
description: String,
}
impl fmt::Display for J4rsBuildError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.description)
}
}
impl Error for J4rsBuildError {
fn description(&self) -> &str {
self.description.as_str()
}
}
impl From<std::env::VarError> for J4rsBuildError {
fn from(err: std::env::VarError) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}
impl From<std::io::Error> for J4rsBuildError {
fn from(err: std::io::Error) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}
impl From<java_locator::errors::JavaLocatorError> for J4rsBuildError {
fn from(err: java_locator::errors::JavaLocatorError) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}
impl From<fs_extra::error::Error> for J4rsBuildError {
fn from(err: fs_extra::error::Error) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}
impl From<glob::PatternError> for J4rsBuildError {
fn from(err: glob::PatternError) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}
impl From<glob::GlobError> for J4rsBuildError {
fn from(err: glob::GlobError) -> J4rsBuildError {
J4rsBuildError {
description: format!("{:?}", err),
}
}
}