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|
use std::path::PathBuf;
use std::process::Command;
#[cfg(target_os = "windows")]
use std::os::windows::process::CommandExt;
pub fn strip_unc_prefix(path: PathBuf) -> PathBuf {
#[cfg(target_os = "windows")]
{
// Remove the UNC prefix (\\?\) from Windows paths
let s = path.to_string_lossy().to_string();
if s.starts_with(r"\\?\") {
return PathBuf::from(&s[4..]);
}
}
path
}
pub fn find_sdkman_java() -> Option<PathBuf> {
let home = std::env::var("HOME").ok()?;
let sdkman_path = PathBuf::from(&home).join(".sdkman/candidates/java/current/bin/java");
if sdkman_path.exists() {
Some(sdkman_path)
} else {
None
}
}
fn run_which_command_with_timeout() -> Option<String> {
let mut cmd = Command::new(if cfg!(windows) { "where" } else { "which" });
cmd.arg("java");
#[cfg(target_os = "windows")]
// Hide the console window on Windows
cmd.creation_flags(0x08000000);
match cmd.output() {
Ok(output) => {
if output.status.success() {
Some(String::from_utf8_lossy(&output.stdout).to_string())
} else {
None
}
}
Err(_) => None,
}
}
pub fn get_java_candidates() -> Vec<PathBuf> {
let mut candidates = Vec::new();
// Only attempt 'which' or 'where' if is not Windows
// CAUTION: linux 'which' may return symlinks, so we need to canonicalize later
if let Some(paths_str) = run_which_command_with_timeout() {
for line in paths_str.lines() {
let path = PathBuf::from(line.trim());
if path.exists() {
let resolved = std::fs::canonicalize(&path).unwrap_or(path);
let final_path = strip_unc_prefix(resolved);
candidates.push(final_path);
}
}
}
#[cfg(target_os = "linux")]
{
let linux_paths = [
"/usr/lib/jvm",
"/usr/java",
"/opt/java",
"/opt/jdk",
"/opt/openjdk",
];
for base in &linux_paths {
if let Ok(entries) = std::fs::read_dir(base) {
for entry in entries.flatten() {
let java_path = entry.path().join("bin/java");
if java_path.exists() {
candidates.push(java_path);
}
}
}
}
let home = std::env::var("HOME").unwrap_or_default();
// Check common SDKMAN! java candidates
if let Some(sdkman_java) = find_sdkman_java() {
candidates.push(sdkman_java);
}
}
#[cfg(target_os = "macos")]
{
let mac_paths = [
"/Library/Java/JavaVirtualMachines",
"/System/Library/Java/JavaVirtualMachines",
"/usr/local/opt/openjdk/bin/java",
"/opt/homebrew/opt/openjdk/bin/java",
];
for path in &mac_paths {
let p = PathBuf::from(path);
if p.is_dir() {
if let Ok(entries) = std::fs::read_dir(&p) {
for entry in entries.flatten() {
let java_path = entry.path().join("Contents/Home/bin/java");
if java_path.exists() {
candidates.push(java_path);
}
}
}
} else if p.exists() {
candidates.push(p);
}
}
// Check common Homebrew java candidates for aarch64 macs
let homebrew_arm = PathBuf::from("/opt/homebrew/Cellar/openjdk");
if homebrew_arm.exists() {
if let Ok(entries) = std::fs::read_dir(&homebrew_arm) {
for entry in entries.flatten() {
let java_path = entry
.path()
.join("libexec/openjdk.jdk/Contents/Home/bin/java");
if java_path.exists() {
candidates.push(java_path);
}
}
}
}
// Check common SDKMAN! java candidates
if let Some(sdkman_java) = find_sdkman_java() {
candidates.push(sdkman_java);
}
}
#[cfg(target_os = "windows")]
{
let program_files =
std::env::var("ProgramFiles").unwrap_or_else(|_| "C:\\Program Files".to_string());
let program_files_x86 = std::env::var("ProgramFiles(x86)")
.unwrap_or_else(|_| "C:\\Program Files (x86)".to_string());
let local_app_data = std::env::var("LOCALAPPDATA").unwrap_or_default();
// Common installation paths for various JDK distributions
let mut win_paths = vec![];
for base in &[&program_files, &program_files_x86, &local_app_data] {
win_paths.push(format!("{}\\Java", base));
win_paths.push(format!("{}\\Eclipse Adoptium", base));
win_paths.push(format!("{}\\AdoptOpenJDK", base));
win_paths.push(format!("{}\\Microsoft\\jdk", base));
win_paths.push(format!("{}\\Zulu", base));
win_paths.push(format!("{}\\Amazon Corretto", base));
win_paths.push(format!("{}\\BellSoft\\LibericaJDK", base));
win_paths.push(format!("{}\\Programs\\Eclipse Adoptium", base));
}
for base in &win_paths {
let base_path = PathBuf::from(base);
if base_path.exists() {
if let Ok(entries) = std::fs::read_dir(&base_path) {
for entry in entries.flatten() {
let java_path = entry.path().join("bin\\java.exe");
if java_path.exists() {
candidates.push(java_path);
}
}
}
}
}
}
// Check JAVA_HOME java candidate
if let Ok(java_home) = std::env::var("JAVA_HOME") {
let bin_name = if cfg!(windows) { "java.exe" } else { "java" };
let java_path = PathBuf::from(&java_home).join("bin").join(bin_name);
if java_path.exists() {
candidates.push(java_path);
}
}
candidates
}
|