Unlucky Launcher v0.2.0

首个 iced + Material 3 Expressive 版本的源码快照。
完整历史与日常提交在 dev 分支；main 只放阶段性快照。

crates/core/tests/setting/migration_chain.rs

@@ -0,0 +1,295 @@
+//! 迁移链：N→N+1 顺序校验、真实迁移跑通、收据闸门防重放、store 接线。
+
+use std::path::PathBuf;
+
+use serde_json::{json, Map, Value};
+use unlucky_core::platform::receipt::{
+    decide, fingerprint_bytes, fingerprint_file, read as read_receipt, MigrationReceipt,
+    ReceiptKind, ReplayDecision,
+};
+use unlucky_core::setting::catalog::SettingSchema;
+use unlucky_core::setting::migrate::{
+    MigrationChain, MigrationGate, MigrationReport, SettingMigration,
+};
+use unlucky_core::setting::schema::{
+    SchemaId, SchemaRef, SchemaVersion, SCHEMA_KEY, SCHEMA_VERSION_KEY,
+};
+use unlucky_core::setting::spec::{AiPolicy, SettingSpec};
+use unlucky_core::setting::store::SettingStore;
+
+use crate::common::TempDir;
+
+/// 1.0.0 → 2.0.0：`download.concurrency` 改名 `download.threads`。
+struct RenameThreads;
+
+impl SettingMigration for RenameThreads {
+    fn from(&self) -> SchemaVersion {
+        SchemaVersion::new(1, 0, 0)
+    }
+
+    fn to(&self) -> SchemaVersion {
+        SchemaVersion::new(2, 0, 0)
+    }
+
+    fn describe(&self) -> &'static str {
+        "download.concurrency → download.threads"
+    }
+
+    fn apply(&self, root: &mut Map<String, Value>) -> Result<(), String> {
+        let Some(download) = root.get_mut("download").and_then(Value::as_object_mut) else {
+            return Ok(());
+        };
+        if let Some(value) = download.remove("concurrency") {
+            download.insert("threads".to_owned(), value);
+        }
+        Ok(())
+    }
+}
+
+/// 2.0.0 → 3.0.0：补一个镜像偏好默认值。
+struct AddMirrorPreference;
+
+impl SettingMigration for AddMirrorPreference {
+    fn from(&self) -> SchemaVersion {
+        SchemaVersion::new(2, 0, 0)
+    }
+
+    fn to(&self) -> SchemaVersion {
+        SchemaVersion::new(3, 0, 0)
+    }
+
+    fn describe(&self) -> &'static str {
+        "补齐 download.mirror_preference"
+    }
+
+    fn apply(&self, root: &mut Map<String, Value>) -> Result<(), String> {
+        let Some(download) = root.get_mut("download").and_then(Value::as_object_mut) else {
+            return Err("缺少 download 对象".to_owned());
+        };
+        download
+            .entry("mirror_preference".to_owned())
+            .or_insert_with(|| json!("auto"));
+        Ok(())
+    }
+}
+
+fn two_step_chain() -> MigrationChain {
+    let mut chain = MigrationChain::new();
+    chain.push(Box::new(RenameThreads)).expect("第一环");
+    chain.push(Box::new(AddMirrorPreference)).expect("第二环");
+    chain
+}
+
+#[test]
+fn chain_requires_contiguous_major_steps() {
+    let mut chain = MigrationChain::new();
+    chain
+        .push(Box::new(AddMirrorPreference))
+        .expect("首环随意起点");
+    assert_eq!(chain.len(), 1);
+
+    let err = chain.push(Box::new(RenameThreads)).expect_err("逆序要报错");
+    assert!(err.to_string().contains("顺序错误"), "{err}");
+    assert_eq!(chain.latest(), Some(SchemaVersion::new(3, 0, 0)));
+    assert_eq!(chain.describe().len(), 1);
+    assert!(!chain.is_empty());
+}
+
+#[test]
+fn duplicate_and_skipping_steps_are_rejected() {
+    let mut chain = MigrationChain::new();
+    chain.push(Box::new(RenameThreads)).expect("首环");
+    assert!(chain.push(Box::new(RenameThreads)).is_err(), "重复起始版本");
+    assert!(chain.push(Box::new(AddMirrorPreference)).is_ok());
+
+    struct SkipMajor;
+    impl SettingMigration for SkipMajor {
+        fn from(&self) -> SchemaVersion {
+            SchemaVersion::new(3, 0, 0)
+        }
+        fn to(&self) -> SchemaVersion {
+            SchemaVersion::new(5, 0, 0)
+        }
+        fn describe(&self) -> &'static str {
+            "跳版本（非法）"
+        }
+        fn apply(&self, _root: &mut Map<String, Value>) -> Result<(), String> {
+            Ok(())
+        }
+    }
+    let err = chain
+        .push(Box::new(SkipMajor))
+        .expect_err("跨两个 major 要报错");
+    assert!(err.to_string().contains("major"), "{err}");
+}
+
+#[test]
+fn migrates_sequentially_and_bumps_schema_version() {
+    let chain = two_step_chain();
+    let mut root = json!({ "download": { "concurrency": 32 } })
+        .as_object()
+        .cloned()
+        .expect("对象");
+    root.insert(SCHEMA_VERSION_KEY.to_owned(), json!(1));
+
+    let report = chain
+        .migrate(SchemaVersion::new(1, 0, 0), &mut root)
+        .expect("迁移");
+    assert_eq!(
+        report,
+        MigrationReport {
+            from: SchemaVersion::new(1, 0, 0),
+            to: SchemaVersion::new(3, 0, 0),
+            applied: vec![
+                "download.concurrency → download.threads",
+                "补齐 download.mirror_preference",
+            ],
+        }
+    );
+    assert!(!report.is_noop());
+    assert_eq!(root["download"]["threads"], json!(32));
+    assert_eq!(root["download"]["mirror_preference"], json!("auto"));
+    assert!(root["download"].get("concurrency").is_none());
+    assert_eq!(root[SCHEMA_VERSION_KEY], json!(3));
+}
+
+#[test]
+fn unknown_start_version_breaks_the_chain() {
+    let chain = two_step_chain();
+    let mut root = Map::new();
+    let err = chain
+        .migrate(SchemaVersion::new(9, 0, 0), &mut root)
+        .expect_err("没有 9.0.0 起始步");
+    assert!(err.to_string().contains("链里没有"), "{err}");
+    assert!(chain.plan_from(SchemaVersion::new(2, 0, 0)).is_ok());
+}
+
+#[test]
+fn failing_step_reports_migration_error() {
+    let mut chain = MigrationChain::new();
+    chain.push(Box::new(RenameThreads)).expect("第一环");
+    chain.push(Box::new(AddMirrorPreference)).expect("第二环");
+
+    let mut root = json!({ "download": 3 }).as_object().cloned().expect("对象");
+    let err = chain
+        .migrate(SchemaVersion::new(1, 0, 0), &mut root)
+        .expect_err("download 不是对象");
+    assert!(err.to_string().contains("迁移"), "{err}");
+}
+
+#[test]
+fn receipt_gate_prevents_replay() {
+    let temp = TempDir::new("migration-gate");
+    let source = temp.write("legacy/hmcl.json", "{\"x\":1}");
+    let target = temp.child("config/launcher.json");
+    let fingerprint = fingerprint_file(&source).expect("算指纹").expect("文件在");
+
+    let receipt_path = temp.child("config/migration-receipt.json");
+    let gate = MigrationGate::new(&receipt_path, 1_700_000_000_000);
+    assert_eq!(gate.now_ms(), 1_700_000_000_000);
+    assert!(gate.should_run(&fingerprint).expect("无收据"));
+
+    let receipt =
+        MigrationReceipt::legacy_config(source, target, fingerprint.clone(), gate.now_ms());
+    gate.record(&receipt).expect("写收据");
+    assert!(!gate.should_run(&fingerprint).expect("同源指纹应跳过"));
+    assert_eq!(
+        gate.evaluate(&fingerprint).expect("评估"),
+        ReplayDecision::SkipSameSource
+    );
+    assert_eq!(
+        gate.evaluate("其他指纹").expect("评估"),
+        ReplayDecision::ReplayChangedSource
+    );
+
+    let stored = read_receipt(&receipt_path)
+        .expect("读收据")
+        .expect("有收据");
+    assert_eq!(stored.kind, ReceiptKind::LegacyConfig);
+    assert_eq!(stored.source_fingerprint, fingerprint);
+}
+
+#[test]
+fn receipt_decisions_and_fingerprints() {
+    let receipt = MigrationReceipt::legacy_config(
+        PathBuf::from("/a"),
+        PathBuf::from("/b"),
+        fingerprint_bytes(b"abc"),
+        7,
+    );
+    assert_eq!(decide(None, "x"), ReplayDecision::ReplayNoReceipt);
+    assert_eq!(
+        decide(Some(&receipt), &fingerprint_bytes(b"abc")),
+        ReplayDecision::SkipSameSource
+    );
+    assert_eq!(
+        decide(Some(&receipt), "changed"),
+        ReplayDecision::ReplayChangedSource
+    );
+    assert_eq!(ReplayDecision::SkipSameSource.as_str(), "skip_same_source");
+    assert!(!ReplayDecision::SkipSameSource.should_replay());
+    assert_eq!(fingerprint_bytes(b"abc").len(), 64);
+    assert_ne!(
+        unlucky_core::platform::receipt::fingerprint_data_dir_move(
+            &PathBuf::from("/a"),
+            &PathBuf::from("/b")
+        ),
+        unlucky_core::platform::receipt::fingerprint_data_dir_move(
+            &PathBuf::from("/a"),
+            &PathBuf::from("/c")
+        )
+    );
+}
+
+fn schema_v2() -> SettingSchema {
+    SettingSchema::new(SchemaId::LAUNCHER, SchemaVersion::new(2, 0, 0)).with(SettingSpec::int(
+        "download.threads",
+        8,
+        (1, 256),
+        AiPolicy::silent(),
+        "下载并发数（2.0.0 起的键名）",
+    ))
+}
+
+#[test]
+fn store_applies_chain_then_saves_new_version() {
+    let temp = TempDir::new("migration-store");
+    let old_url = SchemaRef::new(SchemaId::LAUNCHER, SchemaVersion::new(1, 0, 0)).url();
+    temp.write(
+        "config/launcher.json",
+        &json!({
+            SCHEMA_KEY: old_url,
+            SCHEMA_VERSION_KEY: 1,
+            "download": { "concurrency": 32 }
+        })
+        .to_string(),
+    );
+
+    let mut store = SettingStore::load(temp.child("config/launcher.json"), schema_v2());
+    assert_eq!(store.doc().version(), SchemaVersion::new(1, 0, 0));
+    assert!(!store.is_dirty(), "加载不是改动");
+
+    let mut chain = MigrationChain::new();
+    chain.push(Box::new(RenameThreads)).expect("一环足矣");
+    let report = store.apply_chain(&chain).expect("迁移").expect("有迁移");
+    assert_eq!(report.to, SchemaVersion::new(2, 0, 0));
+    assert_eq!(store.doc().version(), SchemaVersion::new(2, 0, 0));
+    assert_eq!(
+        store.effective("download.threads"),
+        Some(&json!(32)),
+        "值要跟着键名一起搬"
+    );
+    assert!(store.is_dirty(), "迁移结果必须回写");
+
+    store.save().expect("保存");
+    let saved: Value = serde_json::from_str(&temp.read("config/launcher.json")).expect("JSON");
+    assert_eq!(saved[SCHEMA_VERSION_KEY], json!(2));
+    assert!(saved[SCHEMA_KEY]
+        .as_str()
+        .expect("$schema")
+        .ends_with("launcher/2.0.0"));
+    assert_eq!(saved["download"]["threads"], json!(32));
+
+    let mut up_to_date = SettingStore::load(temp.child("config/launcher.json"), schema_v2());
+    assert!(up_to_date.apply_chain(&chain).expect("已最新").is_none());
+}