Add safety check before package pruning

Verifies all state packages are installed locally before running
markAllAsDeps and orphan cleanup.

.gitignore

@@ -32,4 +32,4 @@ go.work.sum
 # .vscode/
 
 # Binary output
-/declpac
+bin/

.opencode/commands/opsx-fixup.md

@@ -0,0 +1,28 @@
+---
+description: Fixup diverging archived openspec change artifacts
+---
+
+Fixup archived openspec change artifacts in @openspec/changes/archive/ that have diverged from the codebase.
+
+For each archived change directory:
+1. Read the .md artifact
+2. Review related code to verify consistency
+3. Fix any mismatches (status, fields, missing links, etc.)
+
+Only run make-commit if changes were made, with a specific message like "Fixup: add missing X field to Y change".
+
+---
+
+**Steps**
+
+1. **For each archived openspec change**
+
+   Read the change artifact.
+
+   Go through the related code.
+
+   Correct the change artifact where needed.
+
+2. **Run make-commit if changes were made**
+
+   skill [name=make-commit] message: "Fixup: <specific fix>"

.opencode/skills/grill-me/SKILL.md

@@ -0,0 +1,10 @@
+---
+name: grill-me
+description: Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".
+---
+
+Interview me relentlessly about every aspect of this plan until we reach a shared understanding. Walk down each branch of the design tree, resolving dependencies between decisions one-by-one. For each question, provide your recommended answer.
+
+Ask the questions one at a time.
+
+If a question can be answered by exploring the codebase, explore the codebase instead.

.opencode/skills/make-commit/SKILL.md

@@ -7,13 +7,26 @@ description: >
 license: GPL-3.0
 metadata:
   author: riyyi
-  version: "1.0"
+  version: "1.1"
 ---
 
 Make a git commit, distinguishing between user and AI contributions.
 
 ---
 
+**Commit message format**
+
+A valid commit message consists of a required **title** and an optional **body**:
+
+Rules:
+- **Title** (required): max 72 characters, starts with a capital letter —
+  unless referring to a tool/project that explicitly uses lowercase (e.g.,
+  "go", "npm", "rustc"). No trailing period.
+- **Body** (optional): any further elaboration. Each line max 72 characters.
+  Wrap manually — do not rely on the terminal to wrap.
+
+---
+
 **Steps**
 
 1. **[REQUIRED] Ask user if this commit is by them or by AI**
@@ -25,49 +38,63 @@ Make a git commit, distinguishing between user and AI contributions.
    - "By me" - User made the commit
    - "By AI" - AI made the commit
 
-2. **Check for commit message**
+2. **Compose the commit message**
 
-   **Capitalization rule**: Commit messages should start with a capital letter,
-   unless it refers to a tool or project that explicitly uses lowercase as its
-   name (e.g., "go", "npm", "rustc").
-
-   If the user did NOT provide a commit message, generate one from staged changes:
+   If the user did NOT provide a commit message, generate one from staged
+   changes:
    ```bash
-   git diff --staged --stat
+   git --no-pager diff --staged
    ```
-   Create a reasonable commit message based on the changes.
+   Write a commit message following the format above.
 
-   If thed user DID provide a message, format it into a proper commit message.
+   If the user **DID** provide a message, treat it as raw input and apply the
+   format rules to it.
 
-3. **Show commit message and confirm**
+3. **Validate the commit message**
+
+   Before presenting the message to the user, check it against every rule:
+
+   - [ ] Title is present and non-empty
+   - [ ] Title is at most 72 characters
+   - [ ] Title starts with a capital letter (or an intentionally lowercase name)
+   - [ ] Title has no trailing period
+   - [ ] Every line in the body is at most 72 characters
+
+   Fix any violations silently before showing the message to the user.
+
+4. **Show commit message and confirm**
 
    Use the **question tool** to ask:
    > "Is this commit message okay, or would you like to make tweaks?"
+   > ```
    > <message>
+   > ```
 
    Options:
    - "Looks good" - Proceed with this message
-   - "Make tweaks" - User will provide a new message
+   - "Make tweaks" - User will provide a new message or describe changes
 
-   **If user wants tweaks**: Ask them for the new commit message.
+   **If user wants tweaks**: apply the same validation (step 3) to the revised
+   message before committing.
 
-4. **Make the commit**
+5. **Make the commit**
 
-   Use the commit message provided by the user.
-
-   **If by user:**
+   For a title-only message:
    ```bash
-   git commit -m "<message>"
+   git commit -m "<title>"
    ```
-   (Uses git config user as both committer and author)
 
-   **If by AI:**
+   For a message with a body, pass `-m` twice (git inserts the blank line):
    ```bash
-   git commit -m "<message>" --author="AI Bot <ai@local>"
+   git commit -m "<title>" -m "<body>"
+   ```
+
+   Append `--author="AI Bot <ai@local>"` when the commit is by AI:
+   ```bash
+   git commit -m "<title>" [-m "<body>"] --author="AI Bot <ai@local>"
    ```
-   (Uses git config for committer, but sets author to AI Bot)
 
 **Output**
 
-- Tell user the commit was made
-- If AI commit, mention that the author was set to "AI Bot <ai@local>"
+- Tell user the commit was made.
+- If AI commit, mention that the author was set to "AI Bot <ai@local>".

AGENTS.md

@@ -2,6 +2,30 @@
 
 ## Skills: Always Active
 
-At the start of every conversation, load the following skills using the `skill` tool before responding to the user:
+At the start of every conversation, load the following skills using the `skill`
+tool before responding to the user:
 
 1. **caveman** — Always use caveman mode (full intensity) for all responses
+
+## Code Organization
+
+### Go: File Structure
+- Variables must appear at the top of each file.
+- Types must appear after variables.
+- Constructors must appear after types.
+- Public (exported) functions must appear after constructors.
+- Private (unexported) functions must appear at the bottom of each file.
+- Within each section, definitions must be sorted alphabetically by name.
+- The sections must be separated by exactly these dividers, filling in the section:
+
+	// -----------------------------------------
+	// <section>
+
+### Go: Line Length
+
+Keep Go lines as short as reasonably possible.
+
+- **Hard limit:** 120 characters — never exceed this.
+- **Preferred:** 100 characters or fewer in normal cases.
+- **Target:** 80 characters if breaking the line produces cleaner, more readable
+  code (e.g. chained calls, long argument lists, multi-condition `if` statements).

Makefile

@@ -1,9 +1,23 @@
-.PHONY: fmt vet check githook
+.PHONY: build fmt fmtcheck vet check githook install uninstall
+
+PKG := github.com/Riyyi/declpac
+BIN := declpac
+BUILD_DIR := bin
+BUILD := $(BUILD_DIR)/$(BIN)
+PREFIX ?= /usr/local
+DESTDIR ?=
 
 STAGED_GO := $(shell git diff --cached --name-only --diff-filter=ACM | grep '\.go$$')
 STAGED_PKGS := $(shell echo "$(STAGED_GO)" | tr ' ' '\n' | xargs -I{} dirname {} | sort -u | sed 's|^|./|')
 
+build:
+	@mkdir -p $(BUILD_DIR)
+	go build -o $(BUILD) ./cmd/declpac
+
 fmt:
+	@gofmt -w cmd pkg
+
+fmtcheck:
 	@if [ -z "$(STAGED_GO)" ]; then exit 0; fi; \
 	unformatted=$$(gofmt -l $(STAGED_GO)); \
 	if [ -n "$$unformatted" ]; then \
@@ -15,7 +29,7 @@ vet:
 	@if [ -z "$(STAGED_GO)" ]; then exit 0; fi; \
 	go vet $(STAGED_PKGS)
 
-check: fmt vet
+check: fmtcheck vet
 
 githook:
 	@mkdir -p .git/hooks
@@ -23,3 +37,10 @@ githook:
 	@echo 'make check' >> .git/hooks/pre-commit
 	@chmod +x .git/hooks/pre-commit
 	@echo "Installed pre-commit hook: .git/hooks/pre-commit"
+
+install: build
+	@mkdir -p $(DESTDIR)$(PREFIX)/bin
+	@install -m 0755 $(BUILD) $(DESTDIR)$(PREFIX)/bin/$(BIN)
+
+uninstall:
+	@rm -f $(DESTDIR)$(PREFIX)/bin/$(BIN)

README.md

@@ -5,8 +5,8 @@ Declarative package manager for Arch Linux that syncs your system with a declare
 ## Features
 
 - Declarative state management — define your desired package list in files or stdin
-- Smart orphan cleanup — removes packages no longer needed
-- Explicit package tracking — marks declared packages as explicit
+- Explicit package tracking — marks declared packages as explicit (with `--prune`)
+- Smart orphan cleanup — removes packages no longer needed (with `--prune`)
 - AUR support — builds and installs AUR packages automatically
 - Machine-readable output — perfect for scripting
 
@@ -27,22 +27,22 @@ sudo mv declpac /usr/local/bin/
 - pacman
 - makepkg (for AUR support)
 - git (for AUR support)
-- Root privileges
+- sudo/doas (root privileges)
 
 ## Usage
 
 ```bash
 # Single state file
-sudo declpac --state packages.txt
+declpac --state packages.txt
 
 # Multiple state files
-sudo declpac --state base.txt --state apps.txt
+declpac --state base.txt --state apps.txt
 
 # From stdin
-cat packages.txt | sudo declpac
+cat packages.txt | declpac
 
 # Preview changes without applying
-sudo declpac --dry-run --state packages.txt
+declpac --dry-run --state packages.txt
 ```
 
 ### State File Format
@@ -57,12 +57,20 @@ docker
 # this is a comment
 ```
 
+### Implicit State File
+
+If `$XDG_CONFIG_HOME/declpac` (or `~/.config/declpac` on fallback) exists, its
+contents are automatically included in the package list.
+
 ### Options
 
 | Flag | Alias | Description |
 |------|-------|-------------|
-| `--state` | `-s` | State file to read package list from (can be used multiple times) |
+| `--state` | `-s` | State file(s) to read package list from (can be used multiple times) |
+| `--nocheck` | | Skip safety check (allow significant package count reductions) |
 | `--dry-run` | | Preview changes without applying them |
+| `--prune` | | Mark packages as explicit and cleanup orphans |
+| `--verbose` | `-v` | Enable verbose output |
 | `--help` | `-h` | Show help message |
 
 ## How It Works
@@ -72,8 +80,8 @@ docker
 3. **Categorize** — Check if packages are in official repos or AUR
 4. **Sync** — Install/update packages via pacman
 5. **Build** — Build and install AUR packages via makepkg
-6. **Mark** — Mark declared packages as explicit, all others as dependencies
-7. **Cleanup** — Remove orphaned packages
+6. **Mark** (with `--prune`) — Mark declared packages as explicit, all others as dependencies
+7. **Cleanup** (with `--prune`) — Remove orphaned packages
 
 ### Database Freshness
 
@@ -81,70 +89,11 @@ If the pacman database is older than 24 hours, it is automatically refreshed.
 
 ### Logging
 
-Operations are logged to `/var/log/declpac.log`.
-
-## Output
-
-```
-# Packages installed/removed
-Installed 5 packages, removed 2 packages
-
-# No changes needed
-Installed 0 packages, removed 0 packages
-
-# Dry-run preview
-Installed 3 packages, removed 1 packages
-Would install: vim, git, docker
-Would remove: python2
-
-# Error
-error: package not found: <package-name>
-```
-
-### Exit Codes
-
-| Code | Meaning |
-|------|---------|
-| 0 | Success |
-| 1 | Error |
-
-## Examples
-
-### Minimal System
-
-```bash
-echo -e "base\nbase-devel\nlinux-headers\nvim\ngit\ncurl" > ~/.config/declpac/minimal.txt
-sudo declpac --state ~/.config/declpac/minimal.txt
-```
-
-### Development Environment
-
-```bash
-# development.txt
-go
-nodejs
-python
-rust
-docker
-
-sudo declpac --state development.txt
-```
-
-### Dry-Run
-
-```bash
-sudo declpac --dry-run --state packages.txt
-```
+Operation are logged to `$XDG_STATE_HOME/declpac.log`
+(or `~/.local/state/declpac.log` on fallback)
 
 ## Troubleshooting
 
-### Permission denied
-
-Use sudo:
-```bash
-sudo declpac --state packages.txt
-```
-
 ### Package not found
 
 Check if the package exists:
@@ -166,12 +115,14 @@ declpac/
 │   └── main.go         # Entry point
 ├── pkg/
 │   ├── input/          # State file/stdin reading
-│   ├── merge/          # Package merging
-│   ├── fetch/         # Package resolution (pacman/AUR)
+│   ├── fetch/          # Package resolution
+│   │   ├── aur/        # AUR support
+│   │   └── alpm/       # ALPM support
 │   ├── pacman/         # Pacman operations
-│   ├── validation/    # Database freshness check
-│   ├── output/        # Output formatting
-│   └── state/         # Logging
+│   │   ├── read/       # Read packages
+│   │   └── sync/       # Sync packages
+│   ├── log/            # Logging
+│   └── output/         # Output formatting
 └── README.md
 ```
 

cmd/declpac/main.go

@@ -8,18 +8,20 @@ import (
 
 	"github.com/urfave/cli/v3"
 
+	"github.com/Riyyi/declpac/pkg/auth"
 	"github.com/Riyyi/declpac/pkg/input"
-	"github.com/Riyyi/declpac/pkg/merge"
+	"github.com/Riyyi/declpac/pkg/log"
 	"github.com/Riyyi/declpac/pkg/output"
 	"github.com/Riyyi/declpac/pkg/pacman"
-	"github.com/Riyyi/declpac/pkg/state"
-	"github.com/Riyyi/declpac/pkg/validation"
+	"github.com/Riyyi/declpac/pkg/pacman/read"
 )
 
 type Config struct {
 	StateFiles []string
-	NoConfirm  bool
+	NoCheck    bool
 	DryRun     bool
+	Prune      bool
+	Verbose    bool
 }
 
 func main() {
@@ -35,13 +37,30 @@ func main() {
 				Usage:       "State file(s) to read package list from",
 				Destination: &cfg.StateFiles,
 			},
+			&cli.BoolFlag{
+				Name:        "nocheck",
+				Usage:       "Skip safety check",
+				Destination: &cfg.NoCheck,
+			},
 			&cli.BoolFlag{
 				Name:        "dry-run",
 				Usage:       "Simulate the sync without making changes",
 				Destination: &cfg.DryRun,
 			},
+			&cli.BoolFlag{
+				Name:        "prune",
+				Usage:       "Mark packages and cleanup orphans",
+				Destination: &cfg.Prune,
+			},
+			&cli.BoolFlag{
+				Name:        "verbose",
+				Aliases:     []string{"v"},
+				Usage:       "Enable verbose output",
+				Destination: &cfg.Verbose,
+			},
 		},
 		Action: func(ctx context.Context, cmd *cli.Command) error {
+			log.Verbose = cfg.Verbose
 			return run(cfg)
 		},
 	}
@@ -53,46 +72,47 @@ func main() {
 
 func run(cfg *Config) error {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] run: starting...\n")
+	log.Debug("run: starting...")
 
 	packages, err := input.ReadPackages(cfg.StateFiles)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error: %v\n", err)
 		return err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] run: packages read (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("run: packages read (%.2fs)", time.Since(start).Seconds())
 
-	merged := merge.Merge(packages)
+	merged, err := input.Merge(packages)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error: %v\n", err)
+		return err
+	}
 
 	if cfg.DryRun {
-		result, err := pacman.DryRun(merged)
+		result, err := read.DryRun(merged)
 		if err != nil {
 			fmt.Fprintf(os.Stderr, "error: %v\n", err)
 			return err
 		}
 		fmt.Println(output.Format(result))
-		fmt.Fprintf(os.Stderr, "[debug] run: dry-run done (%.2fs)\n", time.Since(start).Seconds())
+		log.Debug("run: dry-run done (%.2fs)", time.Since(start).Seconds())
 		return nil
 	}
 
-	if err := state.OpenLog(); err != nil {
+	auth.Start()
+
+	if err := log.OpenLog(); err != nil {
 		fmt.Fprintf(os.Stderr, "error: %v\n", err)
 		return err
 	}
-	defer state.Close()
+	defer log.Close()
 
-	if err := validation.CheckDBFreshness(); err != nil {
-		fmt.Fprintf(os.Stderr, "error: %v\n", err)
-		return err
-	}
-
-	result, err := pacman.Sync(merged)
+	result, err := pacman.Sync(merged, cfg.NoCheck, cfg.Prune)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error: %v\n", err)
 		return err
 	}
 
 	fmt.Println(output.Format(result))
-	fmt.Fprintf(os.Stderr, "[debug] run: sync done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("run: sync done (%.2fs)", time.Since(start).Seconds())
 	return nil
 }

openspec/changes/archive/2026-04-17-add-operation-logging/design.md

@@ -19,47 +19,27 @@
 
 | Pattern | Functions | How |
 |---------|------------|-----|
-| Streaming | MarkAllAsDeps, MarkAsExplicit, InstallAUR | `io.MultiWriter` to tee to both terminal and log |
-| Captured | SyncPackages, CleanupOrphans | capture with `CombinedOutput()`, write to log, write to terminal |
+| Captured | All state-modifying functions | capture output, write to log with single timestamp at start, write to terminal |
+
+### One Timestamp Per Tool Call
+Instead of streaming with MultiWriter (multiple timestamps), each state-modifying function:
+1. Writes timestamp + operation name to log
+2. Runs command, captures output
+3. Writes captured output to log
+4. Writes output to terminal
+
+This ensures exactly 1 timestamp print per tool call.
 
 ### Error Handling
 - Write error to log BEFORE returning from function
 - Print error to stderr so user sees it
 
 ### Dependencies
-- Add to imports: `io`, `os`, `path/filepath`
-
-### Structure
-
-```go
-// pkg/state/state.go
-var logFile *os.File
-
-func OpenLog() error {
-    logPath := filepath.Join("/var/log", "declpac.log")
-    f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-    if err != nil {
-        return err
-    }
-    logFile = f
-    return nil
-}
-
-func GetLogWriter() io.Writer {
-    return logFile
-}
-
-func Close() error {
-    if logFile == nil {
-        return nil
-    }
-    return logFile.Close()
-}
-```
+- Add to imports: `os`, `path/filepath`
 
 ### Flow in Sync() or main entrypoint
 1. Call `OpenLog()` at program start, defer close
-2. Each state-modifying function uses `state.GetLogWriter()` via MultiWriter
+2. Each state-modifying function calls `state.Write()` with timestamp prefix
 
 ### Wire into main.go
 - Open log at start of `run()`

openspec/changes/archive/2026-04-17-add-operation-logging/proposal.md

@@ -7,7 +7,7 @@ debugging and audit.
 ## What Changes
 
 - Add state directory initialization creating `~/.local/state/declpac` if not exists
-- Open/manage a single log file at `$XDG_STATE_HOME/declpac` (e.g., `~/.local/state/declpac/declpac`)
+- Open/manage a single log file at `/var/log/declpac.log`
 - Instrument all state-modifying exec calls in `pkg/pacman/pacman.go` to tee or append output to this file
 - Skip debug messages (internal timing logs)
 - Capture and write errors before returning

openspec/changes/archive/2026-04-17-add-operation-logging/tasks.md

@@ -18,15 +18,11 @@ In `cmd/declpac/main.go` `run()`:
 
 Modify `pkg/pacman/pacman.go`:
 
-All state-modifying functions use `state.Write()` instead of `state.GetLogWriter().Write()`:
-
-```
-// OLD
-state.GetLogWriter().Write(output)
-
-// NEW
-state.Write(output)  // auto-prepends timestamp
-```
+Each state-modifying function writes timestamp ONCE at start, then captures output:
+- Write `timestamp - operation name` to log
+- Run command, capture output
+- Write captured output to log
+- Write output to terminal
 
 **Functions updated:**
 - `SyncPackages()` - write output with timestamp

openspec/changes/archive/2026-04-17-declpac-cli-tool/tasks.md

@@ -47,7 +47,7 @@
 - [x] 6.1 Get list of currently installed packages before sync
 - [x] 6.2 Mark declared state packages as explicitly installed via pacman -D --explicit
 - [x] 6.3 Run pacman sync operation (5.x series)
-- [x] 6.4 Run pacman -Rsu to remove orphaned packages
+- [x] 6.4 Run pacman -Rns to remove orphaned packages
 - [x] 6.5 Capture and report number of packages removed
 - [x] 6.6 Handle case where no orphans exist (no packages removed)
 

openspec/changes/archive/2026-04-17-fix-sync-dbs-not-loaded/proposal.md

@@ -18,4 +18,4 @@ The program fails to find packages that exist in official repositories (like `cm
 
 ## Impact
 
-- `pkg/pacman/pacman.go`: Modify `New()` function to register sync DBs after getting them from the handle
+- `pkg/fetch/fetch.go`: Modify `New()` function to register sync DBs after getting them from the handle

pkg/auth/auth.go

@@ -0,0 +1,104 @@
+package auth
+
+import (
+	"fmt"
+	"os/exec"
+	"regexp"
+	"strconv"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var tool string
+var timeout time.Duration = 5 * time.Minute
+var refreshCommand []string = []string{"-n", "true"}
+
+// -----------------------------------------
+// public
+
+func Command(name string, args ...string) *exec.Cmd {
+	if tool == "" {
+		return log.Command(name, args...)
+	}
+	args = append([]string{name}, args...)
+	return log.Command(tool, args...)
+}
+
+func Run() {
+	exec.Command(tool, refreshCommand...).Run()
+}
+
+func Start() error {
+	err := detect()
+	if err != nil {
+		return err
+	}
+
+	// Automatically refresh privilege elevation to prevent user prompts
+	go func() {
+		for {
+			Run()
+			time.Sleep(timeout)
+		}
+	}()
+
+	return nil
+}
+
+// -----------------------------------------
+// private
+
+func detect() error {
+	tool = getTool()
+	if tool == "" {
+		return fmt.Errorf("no privilege elevation tool detected in PATH")
+	}
+
+	parseTimeout()
+	// We have to be a little faster than the actual timeout
+	timeout -= 30 * time.Second
+
+	return nil
+}
+
+func execLookPath(name string) string {
+	path, err := exec.LookPath(name)
+	if err != nil {
+		return ""
+	}
+	return path
+}
+
+func getTool() string {
+	sudo := execLookPath("sudo")
+	doas := execLookPath("doas")
+
+	if sudo != "" {
+		return "sudo"
+	}
+	if doas != "" {
+		return "doas"
+	}
+
+	return ""
+}
+
+func parseTimeout() {
+	switch tool {
+	case "sudo":
+		out, err := exec.Command("sudo", "sudo", "-V").CombinedOutput()
+		if err != nil {
+			return
+		}
+		re := regexp.MustCompile(`Authentication timestamp timeout: (\d+)\..*`)
+		matches := re.FindStringSubmatch(string(out))
+		if len(matches) == 2 {
+			if minutes, err := strconv.Atoi(matches[1]); err == nil {
+				timeout = time.Duration(minutes) * time.Minute
+			}
+		}
+	case "doas":
+		exec.Command("doas", "true").Run()
+	}
+}

pkg/fetch/alpm/alpm.go

@@ -0,0 +1,148 @@
+package alpm
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/Jguer/dyalpm"
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var (
+	Root        = "/"
+	PacmanState = "/var/lib/pacman"
+)
+
+type Handle struct {
+	handle  dyalpm.Handle
+	localDB dyalpm.Database
+	syncDBs []dyalpm.Database
+}
+
+func (h *Handle) LocalPackages() (map[string]dyalpm.Package, error) {
+	start := time.Now()
+	log.Debug("LocalPackages: starting...")
+
+	localPkgs := make(map[string]dyalpm.Package)
+
+	err := h.localDB.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+		localPkgs[pkg.Name()] = pkg
+		return nil
+	})
+	if err != nil {
+		return nil, fmt.Errorf("failed to iterate local package cache: %w", err)
+	}
+
+	log.Debug("LocalPackages: done (%.2fs)", time.Since(start).Seconds())
+	return localPkgs, nil
+}
+
+func (h *Handle) FindProvidingPackage(depName string) (string, bool) {
+	pkg := h.handle.FindDBSatisfier(h.syncDBs, depName)
+	if pkg != nil {
+		return pkg.Name(), true
+	}
+	return "", false
+}
+
+func (h *Handle) Release() error {
+	if h.handle != nil {
+		h.handle.Release()
+	}
+	return nil
+}
+
+func (h *Handle) SyncPackages(pkgNames []string) (map[string]dyalpm.Package, error) {
+	start := time.Now()
+	log.Debug("SyncPackages: starting...")
+
+	syncPkgs := make(map[string]dyalpm.Package)
+	pkgSet := make(map[string]bool)
+	for _, name := range pkgNames {
+		pkgSet[name] = true
+	}
+
+	for _, db := range h.syncDBs {
+		err := db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+			if pkgSet[pkg.Name()] {
+				if _, exists := syncPkgs[pkg.Name()]; !exists {
+					syncPkgs[pkg.Name()] = pkg
+				}
+			}
+			return nil
+		})
+		if err != nil {
+			return nil, fmt.Errorf("failed to iterate sync database %s: %w", db.Name(), err)
+		}
+	}
+
+	log.Debug("SyncPackages: done (%.2fs)", time.Since(start).Seconds())
+	return syncPkgs, nil
+}
+
+func New() (*Handle, error) {
+	start := time.Now()
+	log.Debug("alpm.New: starting...")
+
+	handle, err := dyalpm.Initialize(Root, PacmanState)
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize alpm: %w", err)
+	}
+
+	localDB, err := handle.LocalDB()
+	if err != nil {
+		handle.Release()
+		return nil, fmt.Errorf("failed to get local database: %w", err)
+	}
+
+	syncDBs, err := handle.SyncDBs()
+	if err != nil {
+		handle.Release()
+		return nil, fmt.Errorf("failed to get sync databases: %w", err)
+	}
+
+	if len(syncDBs) == 0 {
+		syncDBs, err = registerSyncDBs(handle)
+		if err != nil {
+			handle.Release()
+			return nil, fmt.Errorf("failed to register sync databases: %w", err)
+		}
+	}
+
+	log.Debug("alpm.New: done (%.2fs)", time.Since(start).Seconds())
+	return &Handle{
+		handle:  handle,
+		localDB: localDB,
+		syncDBs: syncDBs,
+	}, nil
+}
+
+// -----------------------------------------
+// private
+
+func registerSyncDBs(handle dyalpm.Handle) ([]dyalpm.Database, error) {
+	log.Debug("registerSyncDBs: starting...")
+
+	repos := []string{"core", "extra", "multilib"}
+	var dbs []dyalpm.Database
+
+	for _, repo := range repos {
+		db, err := handle.RegisterSyncDB(repo, 0)
+		if err != nil {
+			continue
+		}
+
+		count := 0
+		db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
+			count++
+			return nil
+		})
+
+		if count > 0 {
+			dbs = append(dbs, db)
+		}
+	}
+
+	log.Debug("registerSyncDBs: done (%d dbs)", len(dbs))
+	return dbs, nil
+}

pkg/fetch/aur/aur.go

@@ -0,0 +1,100 @@
+package aur
+
+import (
+	"encoding/json"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+var AURInfoURL = "https://aur.archlinux.org/rpc?v=5&type=info"
+
+type Package struct {
+	Name        string   `json:"Name"`
+	PackageBase string   `json:"PackageBase"`
+	Version     string   `json:"Version"`
+	URL         string   `json:"URL"`
+	Depends     []string `json:"Depends"`
+	MakeDepends []string `json:"MakeDepends"`
+}
+
+func (p Package) AllDepends() []string {
+	return append(p.Depends, p.MakeDepends...)
+}
+
+type Response struct {
+	Results []Package `json:"results"`
+}
+
+type Client struct {
+	cache map[string]Package
+}
+
+func New() *Client {
+	return &Client{
+		cache: make(map[string]Package),
+	}
+}
+
+func (c *Client) Fetch(packages []string) (map[string]Package, error) {
+	start := time.Now()
+	log.Debug("aur.Fetch: starting...")
+
+	result := make(map[string]Package)
+
+	if len(packages) == 0 {
+		return result, nil
+	}
+
+	var uncached []string
+	for _, pkg := range packages {
+		if _, ok := c.cache[pkg]; !ok {
+			uncached = append(uncached, pkg)
+		}
+	}
+
+	if len(uncached) == 0 {
+		log.Debug("aur.Fetch: done (cached) (%.2fs)", time.Since(start).Seconds())
+		for _, pkg := range packages {
+			result[pkg] = c.cache[pkg]
+		}
+		return result, nil
+	}
+
+	v := url.Values{}
+	for _, pkg := range packages {
+		v.Add("arg[]", pkg)
+	}
+
+	resp, err := http.Get(AURInfoURL + "&" + v.Encode())
+	if err != nil {
+		return result, err
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return result, err
+	}
+
+	var aurResp Response
+	if err := json.Unmarshal(body, &aurResp); err != nil {
+		return result, err
+	}
+
+	for _, r := range aurResp.Results {
+		c.cache[r.Name] = r
+		result[r.Name] = r
+	}
+
+	log.Debug("aur.Fetch: done (%.2fs)", time.Since(start).Seconds())
+	return result, nil
+}
+
+func (c *Client) Get(name string) (Package, bool) {
+	pkg, ok := c.cache[name]
+	return pkg, ok
+}

pkg/fetch/fetch.go

@@ -1,104 +1,54 @@
 package fetch
 
 import (
-	"encoding/json"
 	"fmt"
-	"io"
-	"net/http"
-	"net/url"
-	"os"
-	"os/exec"
-	"strings"
 	"time"
 
-	"github.com/Jguer/dyalpm"
+	"github.com/Riyyi/declpac/pkg/fetch/alpm"
+	"github.com/Riyyi/declpac/pkg/fetch/aur"
+	"github.com/Riyyi/declpac/pkg/log"
 )
 
-var (
-	Root       = "/"
-	LockFile   = "/var/lib/pacman/db.lock"
-	AURInfoURL = "https://aur.archlinux.org/rpc?v=5&type=info"
-)
-
-type Fetcher struct {
-	aurCache map[string]AURPackage
-	handle   dyalpm.Handle
-	localDB  dyalpm.Database
-	syncDBs  []dyalpm.Database
-}
-
 type PackageInfo struct {
 	Name      string
 	InAUR     bool
 	Exists    bool
 	Installed bool
-	AURInfo   *AURPackage
-	syncPkg   dyalpm.Package
+	Provided  string
+	AURInfo   *aur.Package
 }
 
-type AURResponse struct {
-	Results []AURPackage `json:"results"`
+type Fetcher struct {
+	alpmHandle *alpm.Handle
+	aurClient  *aur.Client
 }
 
-type AURPackage struct {
-	Name        string `json:"Name"`
-	PackageBase string `json:"PackageBase"`
-	Version     string `json:"Version"`
-	URL         string `json:"URL"`
-}
+// -----------------------------------------
+// constructor
 
 func New() (*Fetcher, error) {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] Fetcher New: starting...\n")
+	log.Debug("fetch.Fetcher New: starting...")
 
-	handle, err := dyalpm.Initialize(Root, "/var/lib/pacman")
+	alpmHandle, err := alpm.New()
 	if err != nil {
-		return nil, fmt.Errorf("failed to initialize alpm: %w", err)
+		return nil, err
 	}
 
-	localDB, err := handle.LocalDB()
-	if err != nil {
-		handle.Release()
-		return nil, fmt.Errorf("failed to get local database: %w", err)
-	}
+	aurClient := aur.New()
 
-	syncDBs, err := handle.SyncDBs()
-	if err != nil {
-		handle.Release()
-		return nil, fmt.Errorf("failed to get sync databases: %w", err)
-	}
-
-	if len(syncDBs) == 0 {
-		syncDBs, err = registerSyncDBs(handle)
-		if err != nil {
-			handle.Release()
-			return nil, fmt.Errorf("failed to register sync databases: %w", err)
-		}
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] Fetcher New: done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("fetch.Fetcher New: done (%.2fs)", time.Since(start).Seconds())
 	return &Fetcher{
-		aurCache: make(map[string]AURPackage),
-		handle:   handle,
-		localDB:  localDB,
-		syncDBs:  syncDBs,
+		alpmHandle: alpmHandle,
+		aurClient:  aurClient,
 	}, nil
 }
 
-func (f *Fetcher) Close() error {
-	if f.handle != nil {
-		f.handle.Release()
-	}
-	return nil
-}
-
-func (f *Fetcher) GetAURPackage(name string) (AURPackage, bool) {
-	pkg, ok := f.aurCache[name]
-	return pkg, ok
-}
+// -----------------------------------------
+// public
 
 func (f *Fetcher) BuildLocalPkgMap() (map[string]interface{}, error) {
-	localPkgs, err := f.buildLocalPkgMap()
+	localPkgs, err := f.alpmHandle.LocalPackages()
 	if err != nil {
 		return nil, err
 	}
@@ -109,106 +59,47 @@ func (f *Fetcher) BuildLocalPkgMap() (map[string]interface{}, error) {
 	return result, nil
 }
 
-func registerSyncDBs(handle dyalpm.Handle) ([]dyalpm.Database, error) {
-	fmt.Fprintf(os.Stderr, "[debug] registerSyncDBs: starting...\n")
-
-	repos := []string{"core", "extra", "multilib"}
-	var dbs []dyalpm.Database
-
-	for _, repo := range repos {
-		db, err := handle.RegisterSyncDB(repo, 0)
-		if err != nil {
-			continue
+func (f *Fetcher) Close() error {
+	return f.alpmHandle.Release()
 }
 
-		count := 0
-		db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
-			count++
-			return nil
-		})
-
-		if count > 0 {
-			dbs = append(dbs, db)
-		}
+func (f *Fetcher) FetchAur(packages []string) (map[string]aur.Package, error) {
+	return f.aurClient.Fetch(packages)
 }
 
-	fmt.Fprintf(os.Stderr, "[debug] registerSyncDBs: done (%d dbs)\n", len(dbs))
-	return dbs, nil
+func (f *Fetcher) FindProvidingPackage(depName string) (string, bool) {
+	return f.alpmHandle.FindProvidingPackage(depName)
 }
 
-func (f *Fetcher) buildLocalPkgMap() (map[string]dyalpm.Package, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] buildLocalPkgMap: starting...\n")
-
-	localPkgs := make(map[string]dyalpm.Package)
-
-	err := f.localDB.PkgCache().ForEach(func(pkg dyalpm.Package) error {
-		localPkgs[pkg.Name()] = pkg
-		return nil
-	})
-
-	if err != nil {
-		return nil, fmt.Errorf("failed to iterate local package cache: %w", err)
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] buildLocalPkgMap: done (%.2fs)\n", time.Since(start).Seconds())
-	return localPkgs, nil
-}
-
-func (f *Fetcher) checkSyncDBs(pkgNames []string) (map[string]dyalpm.Package, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] checkSyncDBs: starting...\n")
-
-	syncPkgs := make(map[string]dyalpm.Package)
-	pkgSet := make(map[string]bool)
-	for _, name := range pkgNames {
-		pkgSet[name] = true
-	}
-
-	for _, db := range f.syncDBs {
-		err := db.PkgCache().ForEach(func(pkg dyalpm.Package) error {
-			if pkgSet[pkg.Name()] {
-				if _, exists := syncPkgs[pkg.Name()]; !exists {
-					syncPkgs[pkg.Name()] = pkg
-				}
-			}
-			return nil
-		})
-		if err != nil {
-			return nil, fmt.Errorf("failed to iterate sync database %s: %w", db.Name(), err)
-		}
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] checkSyncDBs: done (%.2fs)\n", time.Since(start).Seconds())
-	return syncPkgs, nil
+func (f *Fetcher) GetAURPackage(name string) (aur.Package, bool) {
+	return f.aurClient.Get(name)
 }
 
 func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error) {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] Resolve: starting...\n")
+	log.Debug("fetch.Resolve: starting...")
 
 	result := make(map[string]*PackageInfo)
 	for _, pkg := range packages {
 		result[pkg] = &PackageInfo{Name: pkg, Exists: false}
 	}
 
-	syncPkgs, err := f.checkSyncDBs(packages)
+	syncPkgs, err := f.alpmHandle.SyncPackages(packages)
 	if err != nil {
 		return nil, err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] Resolve: sync db check done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("fetch.Resolve: sync db check done (%.2fs)", time.Since(start).Seconds())
 
-	for pkg, syncPkg := range syncPkgs {
+	for pkg := range syncPkgs {
 		result[pkg].Exists = true
 		result[pkg].InAUR = false
-		result[pkg].syncPkg = syncPkg
 	}
 
-	localPkgs, err := f.buildLocalPkgMap()
+	localPkgs, err := f.alpmHandle.LocalPackages()
 	if err != nil {
 		return nil, err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] Resolve: local pkgs built (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("fetch.Resolve: local pkgs built (%.2fs)", time.Since(start).Seconds())
 
 	for pkg := range localPkgs {
 		if info, ok := result[pkg]; ok {
@@ -224,7 +115,9 @@ func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error) {
 	}
 
 	if len(notInSync) > 0 {
-		f.ensureAURCache(notInSync)
+		if _, err := f.aurClient.Fetch(notInSync); err != nil {
+			log.Debug("fetch.Resolve: aur fetch error: %v", err)
+		}
 
 		for _, pkg := range packages {
 			info := result[pkg]
@@ -232,12 +125,19 @@ func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error) {
 				continue
 			}
 
-			if aurInfo, ok := f.aurCache[pkg]; ok {
+			if aurInfo, ok := f.aurClient.Get(pkg); ok {
 				info.InAUR = true
 				info.AURInfo = &aurInfo
 				continue
 			}
 
+			if providedBy, ok := f.FindProvidingPackage(pkg); ok {
+				log.Debug("fetch.Resolve: %s provided by %s", pkg, providedBy)
+				info.Provided = providedBy
+				info.Exists = true
+				continue
+			}
+
 			return nil, fmt.Errorf("package not found: %s", pkg)
 		}
 	}
@@ -249,93 +149,6 @@ func (f *Fetcher) Resolve(packages []string) (map[string]*PackageInfo, error) {
 		}
 	}
 
-	fmt.Fprintf(os.Stderr, "[debug] Resolve: done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("fetch.Resolve: done (%.2fs)", time.Since(start).Seconds())
 	return result, nil
 }
-
-func (f *Fetcher) ensureAURCache(packages []string) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] ensureAURCache: starting...\n")
-
-	if len(packages) == 0 {
-		return
-	}
-
-	var uncached []string
-	for _, pkg := range packages {
-		if _, ok := f.aurCache[pkg]; !ok {
-			uncached = append(uncached, pkg)
-		}
-	}
-
-	if len(uncached) == 0 {
-		fmt.Fprintf(os.Stderr, "[debug] ensureAURCache: done (%.2fs)\n", time.Since(start).Seconds())
-		return
-	}
-
-	_, err := f.fetchAURInfo(uncached)
-	if err != nil {
-		fmt.Fprintf(os.Stderr, "[debug] ensureAURCache: fetch error: %v\n", err)
-	}
-	fmt.Fprintf(os.Stderr, "[debug] ensureAURCache: done (%.2fs)\n", time.Since(start).Seconds())
-}
-
-func (f *Fetcher) fetchAURInfo(packages []string) (map[string]AURPackage, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] fetchAURInfo: starting...\n")
-
-	result := make(map[string]AURPackage)
-
-	if len(packages) == 0 {
-		return result, nil
-	}
-
-	v := url.Values{}
-	for _, pkg := range packages {
-		v.Add("arg[]", pkg)
-	}
-
-	resp, err := http.Get(AURInfoURL + "&" + v.Encode())
-	if err != nil {
-		return result, err
-	}
-	defer resp.Body.Close()
-
-	body, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return result, err
-	}
-
-	var aurResp AURResponse
-	if err := json.Unmarshal(body, &aurResp); err != nil {
-		return result, err
-	}
-
-	for _, r := range aurResp.Results {
-		f.aurCache[r.Name] = r
-		result[r.Name] = r
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] fetchAURInfo: done (%.2fs)\n", time.Since(start).Seconds())
-	return result, nil
-}
-
-func (f *Fetcher) ListOrphans() ([]string, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] ListOrphans: starting...\n")
-
-	cmd := exec.Command("pacman", "-Qdtq")
-	orphans, err := cmd.Output()
-	if err != nil {
-		return nil, nil
-	}
-
-	list := strings.TrimSpace(string(orphans))
-	if list == "" {
-		fmt.Fprintf(os.Stderr, "[debug] ListOrphans: done (%.2fs)\n", time.Since(start).Seconds())
-		return nil, nil
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] ListOrphans: done (%.2fs)\n", time.Since(start).Seconds())
-	return strings.Split(list, "\n"), nil
-}

pkg/input/input.go

@@ -2,15 +2,43 @@ package input
 
 import (
 	"bufio"
+	"errors"
 	"os"
+	"path/filepath"
 	"strings"
+
+	"github.com/Riyyi/declpac/pkg/lib"
 )
 
+var ErrEmptyList = errors.New("package list is empty")
+
+// -----------------------------------------
+// public
+
+func Merge(packages map[string]bool) ([]string, error) {
+	result := make([]string, 0, len(packages))
+	for name := range packages {
+		result = append(result, name)
+	}
+	if len(result) == 0 {
+		return nil, ErrEmptyList
+	}
+	return result, nil
+}
+
 func ReadPackages(stateFiles []string) (map[string]bool, error) {
 	packages := make(map[string]bool)
 
 	for _, file := range stateFiles {
-		if err := readStateFile(file, packages); err != nil {
+		expanded := lib.ExpandPath(file)
+		if err := readStateFile(expanded, packages); err != nil {
+			return nil, err
+		}
+	}
+
+	implicitStateFile := getImplicitStateFile()
+	if fileExists(implicitStateFile) {
+		if err := readStateFile(implicitStateFile, packages); err != nil {
 			return nil, err
 		}
 	}
@@ -22,6 +50,31 @@ func ReadPackages(stateFiles []string) (map[string]bool, error) {
 	return packages, nil
 }
 
+// -----------------------------------------
+// private
+
+func fileExists(path string) bool {
+	_, err := os.Stat(path)
+	return err == nil
+}
+
+func getImplicitStateFile() string {
+	cfgDir := os.Getenv("XDG_CONFIG_HOME")
+	if cfgDir == "" {
+		cfgDir = "~/.config"
+	}
+	cfgDir = lib.ExpandPath(cfgDir)
+	return filepath.Join(cfgDir, "declpac")
+}
+
+func normalizePackageName(name string) string {
+	name = strings.TrimSpace(name)
+	if name == "" || strings.HasPrefix(name, "#") {
+		return ""
+	}
+	return name
+}
+
 func readStateFile(path string, packages map[string]bool) error {
 	file, err := os.Open(path)
 	if err != nil {
@@ -60,11 +113,3 @@ func readStdin(packages map[string]bool) error {
 
 	return scanner.Err()
 }
-
-func normalizePackageName(name string) string {
-	name = strings.TrimSpace(name)
-	if name == "" || strings.HasPrefix(name, "#") {
-		return ""
-	}
-	return name
-}

pkg/lib/lib.go

@@ -0,0 +1,21 @@
+package lib
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// -----------------------------------------
+// public
+
+func ExpandPath(path string) string {
+	if strings.HasPrefix(path, "~/") {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return path
+		}
+		return filepath.Join(home, path[2:])
+	}
+	return path
+}

pkg/log/log.go

@@ -0,0 +1,74 @@
+package log
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/lib"
+)
+
+var logFile *os.File
+var Verbose bool
+
+// -----------------------------------------
+// public
+
+func Close() error {
+	if logFile == nil {
+		return nil
+	}
+	return logFile.Close()
+}
+
+func Command(name string, args ...string) *exec.Cmd {
+	cmdStr := name + " " + strings.Join(args, " ")
+	fmt.Fprintf(logFile, "[cmd] %s\n", cmdStr)
+	return exec.Command(name, args...)
+}
+
+func Debug(format string, args ...any) {
+	if !Verbose {
+		return
+	}
+	fmt.Fprintf(os.Stderr, "[debug] "+format+"\n", args...)
+}
+
+func GetLogWriter() io.Writer {
+	return logFile
+}
+
+func OpenLog() error {
+	stateDir := os.Getenv("XDG_STATE_HOME")
+	if stateDir == "" {
+		stateDir = "~/.local/state"
+	}
+	stateDir = lib.ExpandPath(stateDir)
+
+	logPath := filepath.Join(stateDir, "declpac.log")
+	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+
+	logFile = f
+	writeTimestamp()
+	return nil
+}
+
+func Write(msg []byte) {
+	logFile.Write(msg)
+}
+
+// -----------------------------------------
+// private
+
+func writeTimestamp() {
+	ts := time.Now().Format("2006-01-02 15:04:05")
+	header := fmt.Sprintf("\n--- %s ---\n", ts)
+	logFile.Write([]byte(header))
+}

pkg/merge/merge.go

@@ -1,9 +0,0 @@
-package merge
-
-func Merge(packages map[string]bool) []string {
-	result := make([]string, 0, len(packages))
-	for name := range packages {
-		result = append(result, name)
-	}
-	return result
-}

pkg/output/output.go

@@ -12,15 +12,18 @@ type Result struct {
 	ToRemove  []string
 }
 
+// -----------------------------------------
+// public
+
 func Format(r *Result) string {
 	var b strings.Builder
-	b.WriteString(fmt.Sprintf("Installed %d packages, removed %d packages", r.Installed, r.Removed))
+	b.WriteString(fmt.Sprintf("installed %d packages, removed %d packages", r.Installed, r.Removed))
 	if len(r.ToInstall) > 0 {
-		b.WriteString("\nWould install: ")
+		b.WriteString("\nwould install: ")
 		b.WriteString(strings.Join(r.ToInstall, ", "))
 	}
 	if len(r.ToRemove) > 0 {
-		b.WriteString("\nWould remove: ")
+		b.WriteString("\nwould remove: ")
 		b.WriteString(strings.Join(r.ToRemove, ", "))
 	}
 	return b.String()

pkg/pacman/pacman.go

@@ -2,146 +2,133 @@ package pacman
 
 import (
 	"fmt"
-	"io"
 	"os"
-	"os/exec"
-	"path/filepath"
-	"regexp"
-	"strings"
+	"slices"
 	"time"
 
 	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/log"
 	"github.com/Riyyi/declpac/pkg/output"
-	"github.com/Riyyi/declpac/pkg/state"
-	"github.com/Riyyi/declpac/pkg/validation"
+	"github.com/Riyyi/declpac/pkg/pacman/read"
+	"github.com/Riyyi/declpac/pkg/pacman/sync"
 )
 
-func MarkAllAsDeps() error {
+func Sync(packages []string, noCheck bool, prune bool) (*output.Result, error) {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] MarkAllAsDeps: starting...\n")
+	log.Debug("Sync: starting...")
 
-	listCmd := exec.Command("pacman", "-Qq")
-	output, err := listCmd.Output()
-	if err != nil {
-		return fmt.Errorf("failed to list packages: %w", err)
-	}
-
-	packages := strings.Split(strings.TrimSpace(string(output)), "\n")
-	if len(packages) == 0 || packages[0] == "" {
-		fmt.Fprintf(os.Stderr, "[debug] MarkAllAsDeps: no packages to mark (%.2fs)\n", time.Since(start).Seconds())
-		return nil
-	}
-
-	args := append([]string{"-D", "--asdeps"}, packages...)
-	cmd := exec.Command("pacman", args...)
-	state.Write([]byte("MarkAllAsDeps...\n"))
-	cmd.Stdout = io.MultiWriter(os.Stdout, state.GetLogWriter())
-	cmd.Stderr = io.MultiWriter(os.Stderr, state.GetLogWriter())
-	err = cmd.Run()
-	if err != nil {
-		state.Write([]byte(fmt.Sprintf("error: %v\n", err)))
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] MarkAllAsDeps: done (%.2fs)\n", time.Since(start).Seconds())
-	return err
-}
-
-func MarkAsExplicit(packages []string) error {
-	if len(packages) == 0 {
-		return nil
-	}
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] MarkAsExplicit: starting...\n")
-
-	args := append([]string{"-D", "--asexplicit"}, packages...)
-	cmd := exec.Command("pacman", args...)
-	state.Write([]byte("MarkAsExplicit...\n"))
-	cmd.Stdout = io.MultiWriter(os.Stdout, state.GetLogWriter())
-	cmd.Stderr = io.MultiWriter(os.Stderr, state.GetLogWriter())
-	err := cmd.Run()
-	if err != nil {
-		state.Write([]byte(fmt.Sprintf("error: %v\n", err)))
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] MarkAsExplicit: done (%.2fs)\n", time.Since(start).Seconds())
-	return err
-}
-
-func Sync(packages []string) (*output.Result, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] Sync: starting...\n")
-
-	before, err := getInstalledCount()
+	explicitList, err := read.ExplicitList()
 	if err != nil {
 		return nil, err
 	}
+	explicitCount := len(explicitList)
 
-	if err := validation.CheckDBFreshness(); err != nil {
+	if !noCheck && len(packages) < explicitCount/2 {
+		errMsg := "safety check: state packages (%d) less than half of explicitly installed (%d), override with --nocheck"
+		return nil, fmt.Errorf(errMsg, len(packages), explicitCount)
+	}
+
+	list, err := read.List()
+	if err != nil {
 		return nil, err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] Sync: database fresh (%.2fs)\n", time.Since(start).Seconds())
+	before := len(list)
+
+	fresh, err := read.DBFreshness()
+	if err != nil {
+		return nil, err
+	}
+	if !fresh {
+		if err := sync.RefreshDB(log.GetLogWriter()); err != nil {
+			return nil, err
+		}
+	}
+	log.Debug("Sync: database fresh (%.2fs)", time.Since(start).Seconds())
 
 	f, err := fetch.New()
 	if err != nil {
 		return nil, err
 	}
 	defer f.Close()
-	fmt.Fprintf(os.Stderr, "[debug] Sync: initialized fetcher (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("Sync: initialized fetcher (%.2fs)", time.Since(start).Seconds())
 
-	fmt.Fprintf(os.Stderr, "[debug] Sync: categorizing packages...\n")
+	log.Debug("Sync: categorizing packages...")
 	pacmanPkgs, aurPkgs, err := categorizePackages(f, packages)
 	if err != nil {
 		return nil, err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] Sync: packages categorized (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("Sync: packages categorized (%.2fs)", time.Since(start).Seconds())
 
 	if len(pacmanPkgs) > 0 {
-		fmt.Fprintf(os.Stderr, "[debug] Sync: syncing %d pacman packages...\n", len(pacmanPkgs))
-		_, err = SyncPackages(pacmanPkgs)
-		if err != nil {
+		log.Debug("Sync: syncing %d pacman packages...", len(pacmanPkgs))
+		if err := sync.SyncPackages(pacmanPkgs, log.GetLogWriter()); err != nil {
 			return nil, err
 		}
-		fmt.Fprintf(os.Stderr, "[debug] Sync: pacman packages synced (%.2fs)\n", time.Since(start).Seconds())
+		log.Debug("Sync: pacman packages synced (%.2fs)", time.Since(start).Seconds())
 	}
 
 	for _, pkg := range aurPkgs {
-		fmt.Fprintf(os.Stderr, "[debug] Sync: installing AUR package %s...\n", pkg)
-		if err := InstallAUR(f, pkg); err != nil {
+		if slices.Contains(list, pkg) {
+			continue
+		}
+		log.Debug("Sync: installing AUR package %s...", pkg)
+		aurInfo, ok := f.GetAURPackage(pkg)
+		if !ok {
+			return nil, fmt.Errorf("AUR package not found in cache: %s", pkg)
+		}
+		if err := sync.InstallAUR(f, pkg, aurInfo.PackageBase, false, log.GetLogWriter()); err != nil {
 			return nil, err
 		}
-		fmt.Fprintf(os.Stderr, "[debug] Sync: AUR package %s installed (%.2fs)\n", pkg, time.Since(start).Seconds())
+		log.Debug("Sync: AUR package %s installed (%.2fs)", pkg, time.Since(start).Seconds())
 	}
 
-	fmt.Fprintf(os.Stderr, "[debug] Sync: marking all as deps...\n")
-	if err := MarkAllAsDeps(); err != nil {
-		fmt.Fprintf(os.Stderr, "warning: could not mark all as deps: %v\n", err)
+	var removed int
+	if prune {
+		log.Debug("Sync: running prune sanity check...")
+		if err := pruneSanityCheck(packages); err != nil {
+			return nil, err
 		}
-	fmt.Fprintf(os.Stderr, "[debug] Sync: all marked as deps (%.2fs)\n", time.Since(start).Seconds())
+		log.Debug("Sync: prune sanity check passed (%.2fs)", time.Since(start).Seconds())
 
-	fmt.Fprintf(os.Stderr, "[debug] Sync: marking state packages as explicit...\n")
-	if err := MarkAsExplicit(packages); err != nil {
+		log.Debug("Sync: marking all as deps...")
+		if err := markAllAsDeps(); err != nil {
+			return nil, err
+		}
+		log.Debug("Sync: all marked as deps (%.2fs)", time.Since(start).Seconds())
+
+		log.Debug("Sync: marking state packages as explicit...")
+		if err := sync.MarkAs(packages, "explicit", log.GetLogWriter()); err != nil {
 			fmt.Fprintf(os.Stderr, "warning: could not mark state packages as explicit: %v\n", err)
 		}
-	fmt.Fprintf(os.Stderr, "[debug] Sync: state packages marked as explicit (%.2fs)\n", time.Since(start).Seconds())
+		log.Debug("Sync: state packages marked as explicit (%.2fs)", time.Since(start).Seconds())
 
-	removed, err := CleanupOrphans()
+		removed, err = cleanupOrphans()
 		if err != nil {
 			return nil, err
 		}
+	}
+
+	list, _ = read.List()
+	if err != nil {
+		return nil, err
+	}
+	after := len(list)
 
-	after, _ := getInstalledCount()
 	installedCount := max(after-before, 0)
 
-	fmt.Fprintf(os.Stderr, "[debug] Sync: done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("Sync: done (%.2fs)", time.Since(start).Seconds())
 	return &output.Result{
 		Installed: installedCount,
 		Removed:   removed,
 	}, nil
 }
 
+// -----------------------------------------
+// private
+
 func categorizePackages(f *fetch.Fetcher, packages []string) (pacmanPkgs, aurPkgs []string, err error) {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] categorizePackages: starting...\n")
+	log.Debug("categorizePackages: starting...")
 
 	resolved, err := f.Resolve(packages)
 	if err != nil {
@@ -161,215 +148,70 @@ func categorizePackages(f *fetch.Fetcher, packages []string) (pacmanPkgs, aurPkg
 		}
 	}
 
-	fmt.Fprintf(os.Stderr, "[debug] categorizePackages: done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("categorizePackages: done (%.2fs)", time.Since(start).Seconds())
 	return pacmanPkgs, aurPkgs, nil
 }
 
-func InstallAUR(f *fetch.Fetcher, pkgName string) error {
+func cleanupOrphans() (int, error) {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] InstallAUR: starting...\n")
+	log.Debug("cleanupOrphans: starting...")
 
-	aurInfo, ok := f.GetAURPackage(pkgName)
-	if !ok {
-		return fmt.Errorf("AUR package not found in cache: %s", pkgName)
-	}
-
-	sudoUser := os.Getenv("SUDO_USER")
-	if sudoUser == "" {
-		sudoUser = os.Getenv("USER")
-		if sudoUser == "" {
-			sudoUser = "root"
-		}
-	}
-
-	tmpDir := "/tmp/declpac-aur-" + pkgName
-	mkdirCmd := exec.Command("su", "-", sudoUser, "-c", "rm -rf "+tmpDir+" && mkdir -p "+tmpDir)
-	if err := mkdirCmd.Run(); err != nil {
-		return fmt.Errorf("failed to create temp directory: %w", err)
-	}
-	defer os.RemoveAll(tmpDir)
-
-	cloneURL := "https://aur.archlinux.org/" + aurInfo.PackageBase + ".git"
-	state.Write([]byte("Cloning " + cloneURL + "\n"))
-	cloneCmd := exec.Command("su", "-", sudoUser, "-c", "git clone "+cloneURL+" "+tmpDir)
-	cloneCmd.Stdout = io.MultiWriter(os.Stdout, state.GetLogWriter())
-	cloneCmd.Stderr = io.MultiWriter(os.Stderr, state.GetLogWriter())
-	if err := cloneCmd.Run(); err != nil {
-		errMsg := fmt.Sprintf("failed to clone AUR repo: %v\n", err)
-		state.Write([]byte("error: " + errMsg))
-		return fmt.Errorf("failed to clone AUR repo: %w", err)
-	}
-	fmt.Fprintf(os.Stderr, "[debug] InstallAUR: cloned (%.2fs)\n", time.Since(start).Seconds())
-
-	state.Write([]byte("Building package...\n"))
-	makepkgCmd := exec.Command("su", "-", sudoUser, "-c", "cd "+tmpDir+" && makepkg -s --noconfirm")
-	makepkgCmd.Stdout = io.MultiWriter(os.Stdout, state.GetLogWriter())
-	makepkgCmd.Stderr = io.MultiWriter(os.Stderr, state.GetLogWriter())
-	if err := makepkgCmd.Run(); err != nil {
-		errMsg := fmt.Sprintf("makepkg failed to build AUR package: %v\n", err)
-		state.Write([]byte("error: " + errMsg))
-		return fmt.Errorf("makepkg failed to build AUR package: %w", err)
-	}
-	fmt.Fprintf(os.Stderr, "[debug] InstallAUR: built (%.2fs)\n", time.Since(start).Seconds())
-
-	pkgFile, err := findPKGFile(tmpDir)
+	orphans, err := read.ListOrphans()
 	if err != nil {
-		return fmt.Errorf("failed to find built package: %w", err)
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return 0, err
 	}
 
-	state.Write([]byte("Installing package...\n"))
-	installCmd := exec.Command("pacman", "-U", "--noconfirm", pkgFile)
-	installCmd.Stdout = io.MultiWriter(os.Stdout, state.GetLogWriter())
-	installCmd.Stderr = io.MultiWriter(os.Stderr, state.GetLogWriter())
-	if err := installCmd.Run(); err != nil {
-		errMsg := fmt.Sprintf("failed to install package: %v\n", err)
-		state.Write([]byte("error: " + errMsg))
-		return fmt.Errorf("failed to install package: %w", err)
+	removed, err := sync.RemoveOrphans(orphans, log.GetLogWriter())
+	if err != nil {
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return 0, err
 	}
-	fmt.Fprintf(os.Stderr, "[debug] InstallAUR: built (%.2fs)\n", time.Since(start).Seconds())
 
-	fmt.Fprintf(os.Stderr, "[debug] InstallAUR: done (%.2fs)\n", time.Since(start).Seconds())
+	log.Debug("cleanupOrphans: done (%.2fs)", time.Since(start).Seconds())
+	return removed, nil
+}
+
+func markAllAsDeps() error {
+	start := time.Now()
+	log.Debug("markAllAsDeps: starting...")
+
+	packages, err := read.List()
+	if err != nil || len(packages) == 0 {
+		return fmt.Errorf("failed to list packages: %w", err)
+	}
+
+	if err := sync.MarkAs(packages, "deps", log.GetLogWriter()); err != nil {
+		log.Write([]byte(fmt.Sprintf("error: %v\n", err)))
+		return err
+	}
+
+	log.Debug("markAllAsDeps: done (%.2fs)", time.Since(start).Seconds())
 	return nil
 }
 
-func findPKGFile(dir string) (string, error) {
-	entries, err := os.ReadDir(dir)
-	if err != nil {
-		return "", err
-	}
-	for _, entry := range entries {
-		name := entry.Name()
-		if strings.HasSuffix(name, ".pkg.tar.zst") || strings.HasSuffix(name, ".pkg.tar.gz") {
-			return filepath.Join(dir, name), nil
-		}
-	}
-	return "", fmt.Errorf("no package file found in %s", dir)
-}
-
-func getInstalledCount() (int, error) {
+// pruneSanityCheck checks if the installation of all state packages succeeded,
+// before attempting to do package marking and orphan cleanup.
+func pruneSanityCheck(statePackages []string) error {
 	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] getInstalledCount: starting...\n")
+	log.Debug("pruneSanityCheck: starting...")
 
-	cmd := exec.Command("pacman", "-Qq")
-	output, err := cmd.Output()
+	localPackages, err := read.List()
 	if err != nil {
-		return 0, nil
-	}
-	count := strings.Count(string(output), "\n") + 1
-	if strings.TrimSpace(string(output)) == "" {
-		count = 0
+		return fmt.Errorf("failed to list local packages: %w", err)
 	}
 
-	fmt.Fprintf(os.Stderr, "[debug] getInstalledCount: done (%.2fs)\n", time.Since(start).Seconds())
-	return count, nil
-}
-
-func SyncPackages(packages []string) (int, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] SyncPackages: starting...\n")
-
-	args := append([]string{"-S", "--needed"}, packages...)
-	cmd := exec.Command("pacman", args...)
-	output, err := cmd.CombinedOutput()
-	if err != nil {
-		errMsg := fmt.Sprintf("pacman sync failed: %s", output)
-		state.Write([]byte(errMsg))
-		return 0, fmt.Errorf("pacman sync failed: %s", output)
-	}
-
-	if len(output) > 0 {
-		state.Write(output)
-	}
-
-	re := regexp.MustCompile(`upgrading (\S+)`)
-	matches := re.FindAllStringSubmatch(string(output), -1)
-
-	fmt.Fprintf(os.Stderr, "[debug] SyncPackages: done (%.2fs)\n", time.Since(start).Seconds())
-	return len(matches), nil
-}
-
-func CleanupOrphans() (int, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] CleanupOrphans: starting...\n")
-
-	f, err := fetch.New()
-	if err != nil {
-		return 0, err
-	}
-	defer f.Close()
-
-	orphans, err := f.ListOrphans()
-	if err != nil || len(orphans) == 0 {
-		fmt.Fprintf(os.Stderr, "[debug] CleanupOrphans: done (%.2fs)\n", time.Since(start).Seconds())
-		return 0, nil
-	}
-
-	removeCmd := exec.Command("pacman", "-Rns")
-	output, err := removeCmd.CombinedOutput()
-	if err != nil {
-		errMsg := fmt.Sprintf("%s: %s", err, output)
-		state.Write([]byte(errMsg))
-		return 0, fmt.Errorf("%s: %s", err, output)
-	}
-
-	if len(output) > 0 {
-		state.Write(output)
-	}
-
-	count := len(orphans)
-
-	fmt.Fprintf(os.Stderr, "[debug] CleanupOrphans: done (%.2fs)\n", time.Since(start).Seconds())
-	return count, nil
-}
-
-func DryRun(packages []string) (*output.Result, error) {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: starting...\n")
-
-	f, err := fetch.New()
-	if err != nil {
-		return nil, err
-	}
-	defer f.Close()
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: initialized fetcher (%.2fs)\n", time.Since(start).Seconds())
-
-	resolved, err := f.Resolve(packages)
-	if err != nil {
-		return nil, err
-	}
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: packages resolved (%.2fs)\n", time.Since(start).Seconds())
-
-	localPkgs, err := f.BuildLocalPkgMap()
-	if err != nil {
-		return nil, err
-	}
-
-	var toInstall []string
-	var aurPkgs []string
-	for _, pkg := range packages {
-		info := resolved[pkg]
-		if info == nil || (!info.Exists && !info.InAUR) {
-			return nil, fmt.Errorf("package not found: %s", pkg)
-		}
-		if info.InAUR {
-			aurPkgs = append(aurPkgs, pkg)
-		} else if _, installed := localPkgs[pkg]; !installed {
-			toInstall = append(toInstall, pkg)
+	var missing []string
+	for _, pkg := range statePackages {
+		if !slices.Contains(localPackages, pkg) {
+			missing = append(missing, pkg)
 		}
 	}
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: packages categorized (%.2fs)\n", time.Since(start).Seconds())
 
-	orphans, err := f.ListOrphans()
-	if err != nil {
-		return nil, err
+	if len(missing) > 0 {
+		return fmt.Errorf("safety check: missing state packages: %v", missing)
 	}
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: orphans listed (%.2fs)\n", time.Since(start).Seconds())
 
-	fmt.Fprintf(os.Stderr, "[debug] DryRun: done (%.2fs)\n", time.Since(start).Seconds())
-	return &output.Result{
-		Installed: len(toInstall) + len(aurPkgs),
-		Removed:   len(orphans),
-		ToInstall: append(toInstall, aurPkgs...),
-		ToRemove:  orphans,
-	}, nil
+	log.Debug("pruneSanityCheck: done (%.2fs)", time.Since(start).Seconds())
+	return nil
 }

pkg/pacman/read/read.go

@@ -0,0 +1,149 @@
+package read
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/log"
+	"github.com/Riyyi/declpac/pkg/output"
+)
+
+var LockFile = "/var/lib/pacman/db.lock"
+
+func DBFreshness() (bool, error) {
+	info, err := os.Stat(LockFile)
+	if err != nil {
+		return false, nil
+	}
+
+	age := time.Since(info.ModTime())
+	return age <= 24*time.Hour, nil
+}
+
+func DryRun(packages []string) (*output.Result, error) {
+	start := time.Now()
+	log.Debug("DryRun: starting...")
+
+	f, err := fetch.New()
+	if err != nil {
+		return nil, err
+	}
+	defer f.Close()
+	log.Debug("DryRun: initialized fetcher (%.2fs)", time.Since(start).Seconds())
+
+	resolved, err := f.Resolve(packages)
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("DryRun: packages resolved (%.2fs)", time.Since(start).Seconds())
+
+	var toInstall []string
+	var aurPkgs []string
+	for _, pkg := range packages {
+		info := resolved[pkg]
+		if info == nil || (!info.Exists && !info.InAUR) {
+			return nil, fmt.Errorf("package not found: %s", pkg)
+		}
+		if info.InAUR && !info.Installed {
+			aurPkgs = append(aurPkgs, pkg)
+		} else if !info.Installed {
+			toInstall = append(toInstall, pkg)
+		}
+	}
+	log.Debug("DryRun: packages categorized (%.2fs)", time.Since(start).Seconds())
+
+	orphans, err := ListOrphans()
+	if err != nil {
+		return nil, err
+	}
+	log.Debug("DryRun: orphans listed (%.2fs)", time.Since(start).Seconds())
+
+	pkgSet := make(map[string]bool)
+	for _, p := range packages {
+		pkgSet[p] = true
+	}
+	var toRemove []string
+	for _, o := range orphans {
+		if !pkgSet[o] {
+			toRemove = append(toRemove, o)
+		}
+	}
+
+	log.Debug("DryRun: done (%.2fs)", time.Since(start).Seconds())
+	return &output.Result{
+		Installed: len(toInstall) + len(aurPkgs),
+		Removed:   len(toRemove),
+		ToInstall: append(toInstall, aurPkgs...),
+		ToRemove:  toRemove,
+	}, nil
+}
+
+func ExplicitList() ([]string, error) {
+	start := time.Now()
+	log.Debug("ExplicitList: starting...")
+
+	cmd := exec.Command("pacman", "-Qqe")
+	output, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+
+	list := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if len(list) > 0 && list[0] == "" {
+		list = nil
+	}
+
+	log.Debug("ExplicitList: done (%.2fs)", time.Since(start).Seconds())
+	return list, nil
+}
+
+func List() ([]string, error) {
+	start := time.Now()
+	log.Debug("List: starting...")
+
+	cmd := exec.Command("pacman", "-Qq")
+	output, err := cmd.Output()
+	if err != nil {
+		return nil, err
+	}
+
+	list := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if list[0] == "" {
+		list = nil
+	}
+
+	log.Debug("List: done (%.2fs)", time.Since(start).Seconds())
+	return list, nil
+}
+
+func ListOrphans() ([]string, error) {
+	start := time.Now()
+	log.Debug("ListOrphans: starting...")
+
+	cmd := exec.Command("pacman", "-Qdtq")
+	var stderr bytes.Buffer
+	cmd.Stderr = &stderr
+
+	output, err := cmd.Output()
+	if err != nil {
+		var exitErr *exec.ExitError
+		if errors.As(err, &exitErr) && exitErr.ExitCode() == 1 && stderr.Len() == 0 {
+			return nil, nil
+		}
+		return nil, err
+	}
+
+	orphans := strings.Split(strings.TrimSpace(string(output)), "\n")
+	if len(orphans) > 0 && orphans[0] == "" {
+		orphans = orphans[1:]
+	}
+
+	log.Debug("ListOrphans: done (%.2fs)", time.Since(start).Seconds())
+	return orphans, nil
+}

pkg/pacman/sync/sync.go

@@ -0,0 +1,318 @@
+package sync
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"os/user"
+	"strings"
+	"time"
+
+	"github.com/Riyyi/declpac/pkg/auth"
+	"github.com/Riyyi/declpac/pkg/fetch"
+	"github.com/Riyyi/declpac/pkg/fetch/aur"
+	"github.com/Riyyi/declpac/pkg/log"
+)
+
+type Result struct {
+	Installed int
+	Removed   int
+}
+
+// -----------------------------------------
+// public
+
+func InstallAUR(f *fetch.Fetcher, pkgName string, packageBase string, asDeps bool, logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("InstallAUR: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	aurInfo := getAURInfo(f, pkgName, packageBase)
+	if err := resolveAndInstallDeps(f, aurInfo, logWriter); err != nil {
+		return err
+	}
+
+	tmpDir := getTempDirName() + "/" + pkgName
+	if err := createTempDir(tmpDir); err != nil {
+		return err
+	}
+	defer os.RemoveAll(tmpDir)
+
+	if err := cloneRepo(packageBase, tmpDir, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: cloned (%.2fs)", time.Since(start).Seconds())
+
+	if err := buildPackage(tmpDir, asDeps, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: built (%.2fs)", time.Since(start).Seconds())
+
+	pkgFile, err := findPKGFile(pkgName, tmpDir)
+	if err != nil {
+		return fmt.Errorf("failed to find built package: %w", err)
+	}
+
+	if err := installBuiltPackage(pkgFile, logWriter); err != nil {
+		return err
+	}
+	log.Debug("InstallAUR: done (%.2fs)", time.Since(start).Seconds())
+
+	return nil
+}
+
+func MarkAs(packages []string, flag string, logWriter io.Writer) error {
+	if len(packages) == 0 {
+		return nil
+	}
+	start := time.Now()
+	flagName := map[string]string{"deps": "asdeps", "explicit": "asexplicit"}[flag]
+	log.Debug("MarkAs(%s): starting...", flag)
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	args := append([]string{"-D", "--" + flagName}, packages...)
+	cmd := auth.Command("pacman", args...)
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("mark as %s failed: %w", flag, err)
+	}
+
+	log.Debug("MarkAs(%s): done (%.2fs)", flag, time.Since(start).Seconds())
+	return nil
+}
+
+func RefreshDB(logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("RefreshDB: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	cmd := auth.Command("pacman", "-Syy")
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("failed to refresh pacman database: %w", err)
+	}
+
+	log.Debug("RefreshDB: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}
+
+func RemoveOrphans(orphans []string, logWriter io.Writer) (int, error) {
+	start := time.Now()
+	log.Debug("RemoveOrphans: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	if len(orphans) == 0 {
+		log.Debug("RemoveOrphans: done (no orphans) (%.2fs)", time.Since(start).Seconds())
+		return 0, nil
+	}
+
+	args := make([]string, 0, 3+len(orphans))
+	args = append(args, "pacman", "-Rns", "--noconfirm")
+	args = append(args, orphans...)
+	removeCmd := auth.Command(args[0], args[1:]...)
+	removeCmd.Stdout = logWriter
+	removeCmd.Stderr = logWriter
+	err := removeCmd.Run()
+	if err != nil {
+		return 0, fmt.Errorf("remove orphans failed: %w", err)
+	}
+
+	count := len(orphans)
+
+	log.Debug("RemoveOrphans: done (%d) (%.2fs)", count, time.Since(start).Seconds())
+	return count, nil
+}
+
+func SyncPackages(packages []string, logWriter io.Writer) error {
+	start := time.Now()
+	log.Debug("SyncPackages: starting...")
+
+	if logWriter == nil {
+		logWriter = os.Stderr
+	}
+
+	args := append([]string{"-S", "--needed", "--noconfirm"}, packages...)
+	cmd := auth.Command("pacman", args...)
+	cmd.Stdout = logWriter
+	cmd.Stderr = logWriter
+	err := cmd.Run()
+	if err != nil {
+		return fmt.Errorf("pacman sync failed: %w", err)
+	}
+
+	log.Debug("SyncPackages: done (%.2fs)", time.Since(start).Seconds())
+	return nil
+}
+
+// -----------------------------------------
+// private
+
+func buildPackage(tmpDir string, asDeps bool, logWriter io.Writer) error {
+	makepkgArgs := []string{"-D", tmpDir, "-s", "--noconfirm"}
+	if asDeps {
+		makepkgArgs = append(makepkgArgs, "--asdeps")
+	}
+	makepkgCmd := log.Command("makepkg", makepkgArgs...)
+	makepkgCmd.Stdout = logWriter
+	makepkgCmd.Stderr = logWriter
+	if err := makepkgCmd.Run(); err != nil {
+		return fmt.Errorf("makepkg failed to build AUR package: %w", err)
+	}
+	return nil
+}
+
+func cloneRepo(packageBase string, tmpDir string, logWriter io.Writer) error {
+	cloneURL := "https://aur.archlinux.org/" + packageBase + ".git"
+	cloneCmd := log.Command("git", "clone", cloneURL, tmpDir)
+	cloneCmd.Stdout = logWriter
+	cloneCmd.Stderr = logWriter
+	if err := cloneCmd.Run(); err != nil {
+		return fmt.Errorf("failed to clone AUR repo: %w", err)
+	}
+	return nil
+}
+
+func createTempDir(tmpDir string) error {
+	if tmpDir == "" || tmpDir == "/" || !strings.HasPrefix(tmpDir, "/tmp") {
+		return fmt.Errorf("safety check: prevented malformed rm -rf call")
+	}
+
+	rmdirCmd := log.Command("rm", "-rf", tmpDir)
+	if err := rmdirCmd.Run(); err != nil {
+		return fmt.Errorf("failed to remove temp directory: %w", err)
+	}
+
+	mkdirCmd := log.Command("mkdir", "-p", tmpDir)
+	if err := mkdirCmd.Run(); err != nil {
+		return fmt.Errorf("failed to create temp directory: %w", err)
+	}
+
+	return nil
+}
+
+func findPKGFile(pkgName string, dir string) (string, error) {
+	entries, err := os.ReadDir(dir)
+	if err != nil {
+		return "", err
+	}
+	for _, entry := range entries {
+		name := entry.Name()
+		if !strings.HasSuffix(name, ".pkg.tar.zst") && !strings.HasSuffix(name, ".pkg.tar.gz") {
+			continue
+		}
+		// Skip packages that do not start with the exact package name, ex: sunshine-bin -> sunshine
+		if !strings.HasPrefix(name, pkgName) {
+			continue
+		}
+		// Skip packages that provide a debug package, ex: sunshine-bin -> sunshine-debug
+		if strings.HasPrefix(name, pkgName+"-debug") {
+			continue
+		}
+		return strings.Join([]string{dir, name}, "/"), nil
+	}
+	return "", fmt.Errorf("no package file found in %s", dir)
+}
+
+func getAURInfo(f *fetch.Fetcher, pkgName string, packageBase string) *aur.Package {
+	if packageBase == "" {
+		return nil
+	}
+	info, ok := f.GetAURPackage(pkgName)
+	if !ok {
+		return nil
+	}
+	return &info
+}
+
+func getTempDirName() string {
+	user, err := user.Current()
+	if err != nil {
+		return "/tmp/declpac"
+	}
+
+	return "/tmp/declpac-" + user.Username
+}
+
+func installBuiltPackage(pkgFile string, logWriter io.Writer) error {
+	installCmd := auth.Command("pacman", "-U", "--noconfirm", pkgFile)
+	installCmd.Stdout = logWriter
+	installCmd.Stderr = logWriter
+	if err := installCmd.Run(); err != nil {
+		return fmt.Errorf("failed to install package: %w", err)
+	}
+	return nil
+}
+
+func resolveAndInstallDeps(f *fetch.Fetcher, aurInfo *aur.Package, logWriter io.Writer) error {
+	if aurInfo == nil {
+		return nil
+	}
+
+	depends := aurInfo.AllDepends()
+	if len(depends) == 0 {
+		return nil
+	}
+
+	resolved, err := f.Resolve(depends)
+	if err != nil {
+		return fmt.Errorf("failed to resolve dependencies: %w", err)
+	}
+
+	var repoDeps, aurDeps []string
+	for _, dep := range depends {
+		info := resolved[dep]
+		if info.Installed {
+			continue
+		}
+		pkg := dep
+		if info.Provided != "" {
+			pkg = info.Provided
+		}
+		if info.Exists {
+			repoDeps = append(repoDeps, pkg)
+		} else if info.InAUR {
+			aurDeps = append(aurDeps, pkg)
+		}
+	}
+
+	if len(repoDeps) > 0 {
+		if err := SyncPackages(repoDeps, logWriter); err != nil {
+			return fmt.Errorf("failed to install repo dependencies: %w", err)
+		}
+	}
+
+	if len(aurDeps) == 0 {
+		return nil
+	}
+
+	fetched, err := f.FetchAur(aurDeps)
+	if err != nil {
+		log.Debug("sync.resolveAndInstallDeps: aur fetch error: %v", err)
+	}
+	for _, dep := range aurDeps {
+		depInfo, ok := fetched[dep]
+		if !ok {
+			continue
+		}
+		if err := InstallAUR(f, dep, depInfo.PackageBase, true, logWriter); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/state/state.go

@@ -1,43 +0,0 @@
-package state
-
-import (
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"time"
-)
-
-var logFile *os.File
-
-func OpenLog() error {
-	logPath := filepath.Join("/var/log", "declpac.log")
-	f, err := os.OpenFile(logPath, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
-	if err != nil {
-		return err
-	}
-	logFile = f
-	return nil
-}
-
-func GetLogWriter() io.Writer {
-	return logFile
-}
-
-func Write(msg []byte) {
-	PrependWithTimestamp(logFile, msg)
-}
-
-func Close() error {
-	if logFile == nil {
-		return nil
-	}
-	return logFile.Close()
-}
-
-func PrependWithTimestamp(w io.Writer, msg []byte) {
-	ts := time.Now().Format("2006-01-02 15:04:05")
-	header := fmt.Sprintf("\n--- %s ---\n", ts)
-	w.Write([]byte(header))
-	w.Write(msg)
-}

pkg/validation/validation.go

@@ -1,33 +0,0 @@
-package validation
-
-import (
-	"fmt"
-	"os"
-	"os/exec"
-	"time"
-)
-
-var LockFile = "/var/lib/pacman/db.lock"
-
-func CheckDBFreshness() error {
-	start := time.Now()
-	fmt.Fprintf(os.Stderr, "[debug] CheckDBFreshness: starting...\n")
-
-	info, err := os.Stat(LockFile)
-	if err != nil {
-		return nil
-	}
-
-	age := time.Since(info.ModTime())
-	if age > 24*time.Hour {
-		cmd := exec.Command("pacman", "-Syy")
-		cmd.Stdout = os.Stdout
-		cmd.Stderr = os.Stderr
-		if err := cmd.Run(); err != nil {
-			return fmt.Errorf("failed to refresh pacman database: %w", err)
-		}
-	}
-
-	fmt.Fprintf(os.Stderr, "[debug] CheckDBFreshness: done (%.2fs)\n", time.Since(start).Seconds())
-	return nil
-}

skills-lock.json

@@ -5,6 +5,12 @@
       "source": "JuliusBrussee/caveman",
       "sourceType": "github",
       "computedHash": "a818cdc41dcfaa50dd891c5cb5e5705968338de02e7e37949ca56e8c30ad4176"
+    },
+    "grill-me": {
+      "source": "mattpocock/skills",
+      "sourceType": "github",
+      "skillPath": "skills/productivity/grill-me/SKILL.md",
+      "computedHash": "784f0dbb7403b0f00324bce9a112f715342777a0daee7bbb7385f9c6f0a170ea"
     }
   }
 }