diff --git a/pkg/log/log.go b/pkg/log/log.go
index c9152c9..5762011 100644
--- a/pkg/log/log.go
+++ b/pkg/log/log.go
@@ -4,7 +4,9 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"os/exec"
 	"path/filepath"
+	"strings"
 	"time"
 )
 
@@ -43,6 +45,12 @@ func Write(msg []byte) {
 	logFile.Write(msg)
 }
 
+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 Close() error {
 	if logFile == nil {
 		return nil
diff --git a/pkg/pacman/sync/sync.go b/pkg/pacman/sync/sync.go
index a59b10f..772fb98 100644
--- a/pkg/pacman/sync/sync.go
+++ b/pkg/pacman/sync/sync.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io"
 	"os"
-	"os/exec"
 	"strings"
 	"time"
 
@@ -25,9 +24,7 @@ func SyncPackages(packages []string, logWriter io.Writer) error {
 	}
 
 	args := append([]string{"-S", "--needed", "--noconfirm"}, packages...)
-	cmdStr := "pacman " + strings.Join(args, " ")
-	fmt.Fprintf(logWriter, "[cmd] %s\n", cmdStr)
-	cmd := exec.Command("pacman", args...)
+	cmd := log.Command("pacman", args...)
 	cmd.Stdout = logWriter
 	cmd.Stderr = logWriter
 	err := cmd.Run()
@@ -47,8 +44,7 @@ func RefreshDB(logWriter io.Writer) error {
 		logWriter = os.Stderr
 	}
 
-	fmt.Fprintf(logWriter, "[cmd] pacman -Syy\n")
-	cmd := exec.Command("pacman", "-Syy")
+	cmd := log.Command("pacman", "-Syy")
 	cmd.Stdout = logWriter
 	cmd.Stderr = logWriter
 	if err := cmd.Run(); err != nil {
@@ -72,9 +68,7 @@ func MarkAs(packages []string, flag string, logWriter io.Writer) error {
 	}
 
 	args := append([]string{"-D", "--" + flagName}, packages...)
-	cmdStr := "pacman " + strings.Join(args, " ")
-	fmt.Fprintf(logWriter, "[cmd] %s\n", cmdStr)
-	cmd := exec.Command("pacman", args...)
+	cmd := log.Command("pacman", args...)
 	cmd.Stdout = logWriter
 	cmd.Stderr = logWriter
 	err := cmd.Run()
@@ -102,9 +96,7 @@ func RemoveOrphans(orphans []string, logWriter io.Writer) (int, error) {
 	args := make([]string, 0, 3+len(orphans))
 	args = append(args, "pacman", "-Rns", "--noconfirm")
 	args = append(args, orphans...)
-	cmdStr := strings.Join(args, " ")
-	fmt.Fprintf(logWriter, "[cmd] %s\n", cmdStr)
-	removeCmd := exec.Command(args[0], args[1:]...)
+	removeCmd := log.Command(args[0], args[1:]...)
 	removeCmd.Stdout = logWriter
 	removeCmd.Stderr = logWriter
 	err := removeCmd.Run()
@@ -134,19 +126,15 @@ func InstallAUR(pkgName string, packageBase string, logWriter io.Writer) error {
 		}
 	}
 
-	tmpDir := "/tmp/declpac-aur-" + pkgName
-	mkdirCmdStr := "su - " + sudoUser + " -c 'rm -rf " + tmpDir + " && mkdir -p " + tmpDir + "'"
-	fmt.Fprintf(logWriter, "[cmd] %s\n", mkdirCmdStr)
-	mkdirCmd := exec.Command("su", "-", sudoUser, "-c", "rm -rf "+tmpDir+" && mkdir -p "+tmpDir)
+	tmpDir := "/tmp/declpac/" + pkgName
+	mkdirCmd := log.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/" + packageBase + ".git"
-	cloneCmdStr := "su - " + sudoUser + " -c 'git clone " + cloneURL + " " + tmpDir + "'"
-	fmt.Fprintf(logWriter, "[cmd] %s\n", cloneCmdStr)
-	cloneCmd := exec.Command("su", "-", sudoUser, "-c", "git clone "+cloneURL+" "+tmpDir)
+	cloneCmd := log.Command("su", "-", sudoUser, "-c", "git clone "+cloneURL+" "+tmpDir)
 	cloneCmd.Stdout = logWriter
 	cloneCmd.Stderr = logWriter
 	if err := cloneCmd.Run(); err != nil {
@@ -154,9 +142,7 @@ func InstallAUR(pkgName string, packageBase string, logWriter io.Writer) error {
 	}
 	log.Debug("InstallAUR: cloned (%.2fs)", time.Since(start).Seconds())
 
-	makepkgCmdStr := "su - " + sudoUser + " -c 'cd " + tmpDir + " && makepkg -s --noconfirm'"
-	fmt.Fprintf(logWriter, "[cmd] %s\n", makepkgCmdStr)
-	makepkgCmd := exec.Command("su", "-", sudoUser, "-c", "cd "+tmpDir+" && makepkg -s --noconfirm")
+	makepkgCmd := log.Command("su", "-", sudoUser, "-c", "cd "+tmpDir+" && makepkg -s --noconfirm")
 	makepkgCmd.Stdout = logWriter
 	makepkgCmd.Stderr = logWriter
 	if err := makepkgCmd.Run(); err != nil {
@@ -169,9 +155,7 @@ func InstallAUR(pkgName string, packageBase string, logWriter io.Writer) error {
 		return fmt.Errorf("failed to find built package: %w", err)
 	}
 
-	installCmdStr := "pacman -U --noconfirm " + pkgFile
-	fmt.Fprintf(logWriter, "[cmd] %s\n", installCmdStr)
-	installCmd := exec.Command("pacman", "-U", "--noconfirm", pkgFile)
+	installCmd := log.Command("pacman", "-U", "--noconfirm", pkgFile)
 	installCmd.Stdout = logWriter
 	installCmd.Stderr = logWriter
 	if err := installCmd.Run(); err != nil {