Add fix for sync DBs not loaded

openspec/changes/fix-sync-dbs-not-loaded/.openspec.yaml

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+schema: spec-driven
+created: 2026-04-14

openspec/changes/fix-sync-dbs-not-loaded/design.md

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+## Context
+
+The dyalpm library's `SyncDBs()` returns an empty slice because it doesn't automatically load sync databases from pacman.conf. This causes `resolvePackages()` to skip the sync DB search entirely and fall through to checking the AUR, which fails for official repo packages.
+
+## Goals / Non-Goals
+
+**Goals:**
+- Register sync databases so `resolvePackages()` can find official repo packages
+
+**Non-Goals:**
+- Modify package installation logic
+- Add support for custom repositories
+
+## Decisions
+
+1. **Register each repo manually** - After `handle.SyncDBs()` returns empty, loop through known repos (core, extra, multilib) and call `handle.RegisterSyncDB()` for each.
+
+2. **Use hardcoded repo list** - Arch Linux standard repos are core, extra, multilib. This matches pacman.conf.
+
+3. **Silent failure for missing repos** - If a repo isn't configured in pacman.conf, `RegisterSyncDB` will return a valid but empty DB. Filter by checking if `PkgCache()` has any packages.
+
+## Risks / Trade-offs
+
+- Hardcoded repo names may need updating if Arch adds/removes standard repos → Low risk, rare change
+- Repo registration could fail silently → Mitigated by checking PkgCache count

openspec/changes/fix-sync-dbs-not-loaded/proposal.md

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+## Why
+
+The program fails to find packages that exist in official repositories (like `cmake` in `extra`). The dyalpm library's `SyncDBs()` returns an empty list, so the code never searches the sync databases and falls through to checking the AUR, which also doesn't have the package.
+
+## What Changes
+
+- Register sync databases manually after initializing the dyalpm handle
+- Loop through known repos (core, extra, multilib) and call `RegisterSyncDB` for each
+- Handle the case where a repo might not be configured in pacman.conf
+
+## Capabilities
+
+### New Capabilities
+- None - this is a bug fix to existing functionality
+
+### Modified Capabilities
+- None
+
+## Impact
+
+- `pkg/pacman/pacman.go`: Modify `New()` function to register sync DBs after getting them from the handle

openspec/changes/fix-sync-dbs-not-loaded/specs/package-resolution/spec.md

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+## ADDED Requirements
+
+No new requirements - this is a bug fix to existing package resolution functionality.
+
+## MODIFIED Requirements
+
+No modified requirements.

openspec/changes/fix-sync-dbs-not-loaded/tasks.md

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+## 1. Implement sync DB registration
+
+- [ ] 1.1 Modify Pac struct to include a method for registering sync DBs
+- [ ] 1.2 In New(), after getting empty syncDBs from handle, loop through ["core", "extra", "multilib"] and call RegisterSyncDB for each
+- [ ] 1.3 Filter out repos that have no packages (not configured in pacman.conf)
+
+## 2. Test the fix
+
+- [ ] 2.1 Run `./declpac --dry-run --state <(echo "cmake")` and verify it resolves cmake from extra repo
+- [ ] 2.2 Test with other official repo packages (e.g., "git" from extra, "base" from core)