feat: docker compose backup

internal/backup/executor.go

@@ -0,0 +1,51 @@
+package backup
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+)
+
+// ComposeExecutor runs docker compose commands.
+type ComposeExecutor struct {
+	ProjectPath string
+	ComposeFile string
+}
+
+// NewComposeExecutor creates an executor for a project.
+func NewComposeExecutor(projectPath, composeFile string) *ComposeExecutor {
+	return &ComposeExecutor{
+		ProjectPath: projectPath,
+		ComposeFile: composeFile,
+	}
+}
+
+// Stop runs `docker compose -f <file> stop`.
+func (e *ComposeExecutor) Stop(ctx context.Context) error {
+	args := []string{"compose", "-f", e.ComposeFile, "stop"}
+	cmd := exec.CommandContext(ctx, "docker", args...)
+	cmd.Dir = e.ProjectPath
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("docker compose stop: %w\n%s", err, string(out))
+	}
+	return nil
+}
+
+// Start runs `docker compose -f <file> up -d`.
+func (e *ComposeExecutor) Start(ctx context.Context) error {
+	args := []string{"compose", "-f", e.ComposeFile, "up", "-d"}
+	cmd := exec.CommandContext(ctx, "docker", args...)
+	cmd.Dir = e.ProjectPath
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("docker compose up -d: %w\n%s", err, string(out))
+	}
+	return nil
+}
+
+// IsDockerAvailable checks whether docker is on PATH.
+func IsDockerAvailable() bool {
+	_, err := exec.LookPath("docker")
+	return err == nil
+}