Merge branch 'feat/p3-fix-game-java-discover-cfg-gating-jav'
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commit
37ccaaf23f
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@@ -186,13 +186,24 @@ pub fn dedupe(runtimes: Vec<JavaRuntime>) -> Vec<JavaRuntime> {
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kept
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}
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/// 去重键:去掉 Windows 的 `\\?\` 前缀、统一分隔符、大小写不敏感(Windows)。
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/// 去重键:剥掉 Windows 的 `\\?\` 前缀、分隔符一律折成 `/`、大小写只在 Windows 折叠。
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///
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/// 前两步与平台无关:同一条 `bin/java[.exe]` 用 `/` 还是 `\` 拼出来都是同一个文件,
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/// 键必须相同——`JAVA_HOME` 的写法与扫盘拼出来的路径常在这点上不一致,键不齐就重复列。
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/// 大小写折叠**只能**跟着平台走:NTFS 不区分大小写,而 POSIX 上 `Java` 与 `java` 是两个
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/// 目录,折了会把两份真实安装误并成一个。
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///
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/// 代价(已知且有意的取舍):POSIX 上文件名里的字面反斜杠也会被当分隔符。JDK 安装路径带
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/// 反斜杠属于病态情况,换来的是「同一条 java 的两种拼法永远同键」这条平台无关的不变量。
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#[must_use]
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pub fn path_key(path: &Path) -> String {
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let text = path.display().to_string();
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let text = text.strip_prefix(r"\\?\").unwrap_or(&text).to_string();
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let text = text
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.strip_prefix(r"\\?\")
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.unwrap_or(&text)
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.replace('\\', "/");
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if cfg!(windows) {
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text.replace('/', "\\").to_ascii_lowercase()
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text.to_ascii_lowercase()
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} else {
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text
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}
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@@ -236,11 +247,56 @@ mod tests {
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}
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#[test]
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fn path_key_normalises_separators() {
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let left = path_key(std::path::Path::new("C:/a/b/java.exe"));
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let right = path_key(std::path::Path::new("C:\\a\\b\\java.exe"));
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assert_eq!(left, right);
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assert!(!path_key(std::path::Path::new(r"\\?\C:\a\java.exe")).starts_with(r"\\"));
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fn path_key_normalises_separators_on_every_platform() {
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// 平台无关的不变量:同一条 `bin/java` 用 `/` 还是 `\` 拼出来,键必须相同。
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// (M49:原来这里只在 Windows 上成立,Linux 上 `\` 原样留着 → 断言挂。)
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let forward = path_key(std::path::Path::new("C:/a/b/java.exe"));
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let backward = path_key(std::path::Path::new("C:\\a\\b\\java.exe"));
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assert_eq!(forward, backward);
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assert!(
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!forward.contains('\\'),
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"键里不该残留反斜杠(与平台无关):{forward}"
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);
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assert!(
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!forward.starts_with(r"\\"),
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"`\\\\?\\` 前缀不进键:{forward}"
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);
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}
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#[test]
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fn one_install_normalises_to_one_key_whatever_the_spelling() {
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// 回归钉子:`JAVA_HOME` 与扫盘常对同一个 java 给出不同写法,四种拼法必须同键。
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let spellings = [
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"C:/Program Files/Java/jdk-21/bin/java.exe",
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r"C:\Program Files\Java\jdk-21\bin\java.exe",
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r"\\?\C:\Program Files\Java\jdk-21\bin\java.exe",
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r"C:\Program Files\Java\jdk-21/bin/java.exe",
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];
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let key = path_key(std::path::Path::new(spellings[0]));
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for spelling in spellings {
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assert_eq!(
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path_key(std::path::Path::new(spelling)),
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key,
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"同一安装的两种写法必须同键:{spelling}"
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);
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}
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}
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#[test]
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fn path_key_folds_case_only_where_the_filesystem_does() {
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// 大小写折叠跟平台走,两侧都钉住:NTFS 不区分大小写 → 折;
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// POSIX 上 `Java` 与 `java` 是两个目录 → 不折(折了会把两份真实安装误并)。
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let upper = path_key(std::path::Path::new(
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"C:/Program Files/Java/jdk-21/bin/java.exe",
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));
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let lower = path_key(std::path::Path::new(
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"c:/program files/java/jdk-21/bin/java.exe",
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));
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if cfg!(windows) {
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assert_eq!(upper, lower, "Windows:大小写不同的同一路径应同键");
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} else {
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assert_ne!(upper, lower, "POSIX:大小写是有效区别,不应同键");
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}
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}
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#[test]
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@@ -96,17 +96,20 @@ fn scanned_java_is_still_used_when_nothing_else_matches() {
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#[test]
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fn dedupe_collapses_one_install_found_twice() {
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// `JAVA_HOME` 指向 Program Files 里的 JDK → 同一个 java 不应列两次。
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// 第二条的「另一种写法」随平台给:Windows 上大小写和分隔符都可能不一致(NTFS 不区分
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// 大小写),POSIX 上大小写是有效区别,只能靠分隔符拼出同一路径的第二种写法。
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let duplicate = if cfg!(windows) {
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"c:/program files/java/jdk-21/bin/java.exe"
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} else {
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"C:\\Program Files\\Java\\jdk-21/bin/java.exe"
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};
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let candidates = discover::dedupe(vec![
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runtime(
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"C:/Program Files/Java/jdk-21/bin/java.exe",
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21,
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JavaOrigin::JavaHome,
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),
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runtime(
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"c:/program files/java/jdk-21/bin/java.exe",
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21,
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JavaOrigin::System,
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),
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runtime(duplicate, 21, JavaOrigin::System),
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]);
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assert_eq!(candidates.len(), 1);
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assert_eq!(candidates[0].origin, JavaOrigin::JavaHome);
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