feat: rebuild, list, rollback — Phase 5 completion

- kappa rebuild: diffs config vs installed DB, reports changed/added/removed packages, detects kernel/init/bootloader/service changes - kappa list: shows installed packages with versions, hashes, provides - kappa rollback: lists available generations from /kappa/db/generations - list + rollback don't require a file argument (no-file subcommands) - Rebuild wired to compute_changes() → per-package change detection Full pipeline: resolve → fetch → build → install → list/rollback/rebuild
2026-07-30 05:53:00 -04:00
parent c276465f3a
commit 7712f88386
3 changed files with 169 additions and 3 deletions
@@ -0,0 +1,84 @@
+#include "kappa/rebuild/rebuild.hpp"
+#include "kappa/install/install.hpp"
+
+#include <format>
+#include <set>
+
+namespace kappa::rebuild {
+
+ChangeSet compute_changes(const dsl::SystemConfig& cfg) {
+    ChangeSet cs;
+    auto installed = install::read_installed();
+
+    std::set<std::string> installed_names;
+    for (auto& e : installed) { installed_names.insert(e.name); }
+
+    std::set<std::string> config_names;
+    for (auto& p : cfg.packages) { config_names.insert(p.name); }
+
+    for (auto& p : cfg.packages) {
+        if (!installed_names.contains(p.name)) {
+            cs.added.push_back(p.name);
+            continue;
+        }
+
+        bool found = false;
+        for (auto& e : installed) {
+            if (e.name != p.name) { continue; }
+            found = true;
+
+            bool ver_changed = !p.version.empty()
+                            && e.version != p.version;
+            bool feat_changed = !p.features.empty();
+            bool cfg_changed = !p.config.empty();
+
+            if (ver_changed || feat_changed || cfg_changed) {
+                cs.changed.push_back(p.name);
+            }
+            break;
+        }
+        if (!found) { cs.added.push_back(p.name); }
+    }
+
+    for (auto& e : installed) {
+        if (!config_names.contains(e.name)) {
+            cs.removed.push_back(e.name);
+        }
+    }
+
+    for (auto& e : installed) {
+        if (e.name == "kernel" && e.hash != cfg.boot.kernel) {
+            cs.kernel_changed = true;
+        }
+        if (e.name == "init" && e.hash != cfg.boot.init) {
+            cs.init_changed = true;
+        }
+        if (e.name == "bootloader" && e.hash != cfg.boot.bootloader) {
+            cs.bootloader_changed = true;
+        }
+    }
+
+    for (auto& svc : cfg.services) {
+        if (!svc.enable) { continue; }
+        bool found = false;
+        for (auto& e : installed) {
+            if (e.name == ("svc:" + svc.name)) {
+                found = true;
+                for (auto& [k, v] : svc.config) {
+                    auto it = std::find(e.provides.begin(), e.provides.end(),
+                                       k + "=" + v);
+                    if (it == e.provides.end()) {
+                        cs.services_changed = true;
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+        if (!found) { cs.services_changed = true; break; }
+    }
+
+    return cs;
+}
+
+} // namespace kappa::rebuild