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use std::borrow::Cow;
use std::ffi::{OsStr, OsString};
use std::iter;
use std::path::{Path, PathBuf};
use std::process::Command;
use log::{debug, warn};
use tokio::{fs, io};
use crate::util::AsJavaPath;
use crate::version::{CompleteVersion, FeatureMatcher, OperatingSystem};
use super::rules::CompatCheck;
use super::strsub::{self, SubFunc};
use super::{Launch, LaunchInfo};
#[derive(Clone, Copy)]
struct LaunchArgSub<'a, 'l, F: FeatureMatcher>(&'a LaunchInfo<'l, F>);
// FIXME: this is not correct
#[cfg(windows)]
const PATH_SEP: &str = ";";
#[cfg(not(windows))]
const PATH_SEP: &str = ":";
impl<'rep, 'l, F: FeatureMatcher> SubFunc<'rep> for LaunchArgSub<'rep, 'l, F> {
fn substitute(&self, key: &str) -> Option<Cow<'rep, str>> {
match key {
"assets_index_name" => self.0.asset_index_name.as_ref().map(|s| Cow::Borrowed(s.as_str())),
"assets_root" => Some(self.0.launcher.assets.get_home().as_java_path().to_string_lossy()),
"auth_access_token" => Some(Cow::Borrowed("-")), // TODO
"auth_player_name" => Some(Cow::Borrowed("Player")), // TODO
"auth_session" => Some(Cow::Borrowed("-")), // TODO
"auth_uuid" => Some(Cow::Borrowed("00000000-0000-0000-0000-000000000000")), // TODO
"auth_xuid" => Some(Cow::Borrowed("00000000-0000-0000-0000-000000000000")), // TODO
"classpath" => Some(Cow::Borrowed(self.0.classpath.as_str())),
"classpath_separator" => Some(Cow::Borrowed(PATH_SEP)),
"game_assets" => self.0.virtual_assets_path.as_ref()
.map(|s| s.as_path().as_java_path().to_string_lossy()),
"game_directory" => Some(self.0.instance_home.as_java_path().to_string_lossy()),
"language" => Some(Cow::Borrowed("en-us")), // ???
"launcher_name" => Some(Cow::Borrowed("ozone (olauncher 3)")), // TODO
"launcher_version" => Some(Cow::Borrowed("yeah")), // TODO
"library_directory" => Some(self.0.launcher.libraries.home.as_java_path().to_string_lossy()),
"natives_directory" => Some(self.0.natives_path.as_java_path().to_string_lossy()),
"primary_jar" => self.0.client_jar.as_ref().map(|p| p.as_path().as_java_path().to_string_lossy()),
"quickPlayMultiplayer" => None, // TODO
"quickPlayPath" => None, // TODO
"quickPlayRealms" => None, // TODO
"quickPlaySingleplayer" => None, // TODO
"resolution_height" => None, // TODO
"resolution_width" => None, // TODO
"user_properties" => Some(Cow::Borrowed("{}")), // TODO
"user_property_map" => Some(Cow::Borrowed("[]")), // TODO
"user_type" => Some(Cow::Borrowed("legacy")), // TODO
"version_name" => Some(Cow::Borrowed(&self.0.version_id.as_ref())),
"version_type" => self.0.version_type.as_ref().map(|s| Cow::Borrowed(s.to_str())),
_ => {
if let Some(asset_key) = key.strip_prefix("asset=") {
return self.0.asset_index.as_ref()
.map_or(None, |idx| idx.objects.get(asset_key))
.map(|obj| Cow::Owned(self.0.launcher.assets.get_object_path(obj).as_java_path().to_string_lossy().into_owned()))
}
None
}
}
}
}
#[derive(Clone, Copy)]
pub enum ArgumentType {
JVM,
Game
}
pub fn build_arguments<'l, F: FeatureMatcher>(launch: &LaunchInfo<'l, F>, version: &CompleteVersion, arg_type: ArgumentType) -> Vec<OsString> {
let sub = LaunchArgSub(launch);
let system_info = &launch.launcher.system_info;
if let Some(arguments) = version.arguments.as_ref().map_or(None, |args| match arg_type {
ArgumentType::JVM => args.jvm.as_ref(),
ArgumentType::Game => args.game.as_ref()
}) {
arguments.iter()
.filter(|wa| wa.rules_apply(system_info, launch.feature_matcher).is_ok())
.flat_map(|wa| &wa.value)
.map(|s| OsString::from(strsub::replace_string(s, &sub).into_owned())).collect()
} else if let Some(arguments) = version.minecraft_arguments.as_ref() {
match arg_type {
ArgumentType::JVM => {
[
"-Djava.library.path=${natives_directory}",
"-Dminecraft.launcher.brand=${launcher_name}",
"-Dminecraft.launcher.version=${launcher_version}",
"-Dminecraft.client.jar=${primary_jar}",
"-cp",
"${classpath}"
].into_iter()
.chain(iter::once("-XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump")
.take_while(|_| system_info.os == OperatingSystem::Windows))
.chain(iter::once(["-Dos.name=Windows 10", "-Dos.version=10.0"])
.take_while(|_| launch.feature_matcher.matches("__ozone_win10_hack"))
.flatten())
.chain(iter::once(["-Xdock:icon=${asset=icons/minecraft.icns}", "-Xdock:name=Minecraft"])
.take_while(|_| system_info.os == OperatingSystem::MacOS)
.flatten())
.map(|s| OsString::from(strsub::replace_string(s, &sub).into_owned()))
.collect()
},
ArgumentType::Game => {
arguments.split(' ')
.chain(iter::once("--demo")
.take_while(|_| launch.feature_matcher.matches("is_demo_user")))
.chain(iter::once(["--width", "${resolution_width}", "--height", "${resolution_height}"])
.take_while(|_| launch.feature_matcher.matches("has_custom_resolution"))
.flatten())
.map(|s| OsString::from(strsub::replace_string(s, &sub).into_owned()))
.collect()
}
}
} else {
Vec::default()
}
}
pub fn run_the_game(launch: &Launch) -> Result<(), Box<dyn std::error::Error>> {
if launch.runtime_legacy_launch {
Command::new(launch.runtime_path.as_path().as_java_path())
.args(launch.jvm_args.iter()
.map(|o| o.as_os_str())
.chain(iter::once(OsStr::new(launch.main_class.as_str())))
.chain(launch.game_args.iter().map(|o| o.as_os_str())))
.current_dir(launch.instance_path.as_path().as_java_path()).spawn()?.wait()?;
} else {
todo!("jni launch not supported :(")
}
Ok(())
}
#[allow(dead_code)]
mod windows {
pub const JNI_SEARCH_PATH: Option<&str> = Some("server/jvm.dll");
pub const JAVA_SEARCH_PATH: Option<&str> = Some("bin/java.exe");
pub const JRE_PLATFORM_KNOWN: bool = true;
}
#[allow(dead_code)]
mod linux {
pub const JNI_SEARCH_PATH: Option<&str> = Some("server/libjvm.so");
pub const JAVA_SEARCH_PATH: Option<&str> = Some("bin/java");
pub const JRE_PLATFORM_KNOWN: bool = true;
}
#[allow(dead_code)]
mod macos {
pub const JNI_SEARCH_PATH: Option<&str> = Some("server/libjvm.dylib");
pub const JAVA_SEARCH_PATH: Option<&str> = Some("bin/java");
pub const JRE_PLATFORM_KNOWN: bool = true;
}
#[allow(dead_code)]
mod unknown {
pub const JNI_SEARCH_PATH: Option<&str> = None;
pub const JAVA_SEARCH_PATH: Option<&str> = None;
pub const JRE_PLATFORM_KNOWN: bool = false;
}
#[cfg(target_os = "windows")]
use self::windows::*;
#[cfg(target_os = "linux")]
use self::linux::*;
#[cfg(target_os = "macos")]
use self::macos::*;
#[cfg(not(any(target_os = "windows", target_os = "linux", target_os = "macos")))]
use self::unknown::*;
fn search_java_sync(base: impl AsRef<Path>, legacy: bool) -> Result<Option<PathBuf>, io::Error> {
assert!(JRE_PLATFORM_KNOWN);
let search_path = Path::new(match legacy {
true => JAVA_SEARCH_PATH,
_ => JNI_SEARCH_PATH
}.unwrap());
let walker = walkdir::WalkDir::new(base.as_ref()).into_iter()
.filter_map(|e| e.ok())
.filter(|e| e.file_type().is_dir());
for entry in walker {
let check_path = [base.as_ref(), entry.path(), Path::new(search_path)].into_iter().collect::<PathBuf>();
match std::fs::metadata(check_path.as_path()) {
Err(e) if e.kind() == io::ErrorKind::NotFound => (),
Err(e) => return Err(e),
Ok(meta) if meta.is_file() => return Ok(Some(check_path)),
_ => ()
}
}
Ok(None) // not found (sadface)
}
pub async fn find_java(base: impl AsRef<Path>, legacy: bool) -> Result<Option<PathBuf>, io::Error> {
let meta = fs::metadata(&base).await?;
if meta.is_dir() { // do search
if !JRE_PLATFORM_KNOWN {
warn!("Unknown platform! Cannot search for java executable in {}. Please specify the executable file manually.", base.as_ref().display());
return Ok(None);
}
let (tx, rx) = tokio::sync::oneshot::channel();
let base = base.as_ref().to_path_buf(); // idc
tokio::task::spawn_blocking(move || {
let res = search_java_sync(base, legacy);
let _ = tx.send(res); // I really don't care if the reader hung up
}).await.expect("jre search panicked");
rx.await.expect("jre search didn't send us a result")
} else { // we are pointed directly at a file. assume it's what we want
debug!("JRE path {} is a file ({}). Assuming it's what we want.", base.as_ref().display(), legacy);
Ok(Some(base.as_ref().to_path_buf()))
}
}
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