fix: Show error messages on fatal failures #32

internal/flows/common.go

@@ -0,0 +1,76 @@
+package flows
+
+import (
+	"context"
+
+	"github.com/safedep/pmg/analyzer"
+	"github.com/safedep/pmg/config"
+	"github.com/safedep/pmg/guard"
+	"github.com/safedep/pmg/internal/ui"
+	"github.com/safedep/pmg/packagemanager"
+)
+
+type commonFlow struct {
+	pm packagemanager.PackageManager
+}
+
+// Creates a common flow of execution for all package managers. This should work for most
+// of the cases unless a package manager has its own unique requirements. Configuration
+// should be passed through the context (Global Config)
+func Common(pm packagemanager.PackageManager) *commonFlow {
+	return &commonFlow{
+		pm: pm,
+	}
+}
+
+func (f *commonFlow) Run(ctx context.Context, args []string) error {
+	config, err := config.FromContext(ctx)
+	if err != nil {
+		ui.Fatalf("Failed to get config: %s", err)
+	}
+
+	packageResolverConfig := packagemanager.NewDefaultNpmDependencyResolverConfig()
+	packageResolverConfig.IncludeTransitiveDependencies = config.Transitive
+	packageResolverConfig.TransitiveDepth = config.TransitiveDepth
+	packageResolverConfig.IncludeDevDependencies = config.IncludeDevDependencies
+
+	packageResolver, err := packagemanager.NewNpmDependencyResolver(packageResolverConfig)
+	if err != nil {
+		ui.Fatalf("Failed to create dependency resolver: %s", err)
+	}
+
+	var analyzers []analyzer.PackageVersionAnalyzer
+
+	if config.Paranoid {
+		malysisActiveScanAnalyzer, err := analyzer.NewMalysisActiveScanAnalyzer(analyzer.DefaultMalysisActiveScanAnalyzerConfig())
+		if err != nil {
+			ui.Fatalf("Failed to create malware analyzer: %s", err)
+		}
+
+		analyzers = append(analyzers, malysisActiveScanAnalyzer)
+	} else {
+		malysisQueryAnalyzer, err := analyzer.NewMalysisQueryAnalyzer(analyzer.MalysisQueryAnalyzerConfig{})
+		if err != nil {
+			ui.Fatalf("Failed to create malware analyzer: %s", err)
+		}
+
+		analyzers = append(analyzers, malysisQueryAnalyzer)
+	}
+
+	interaction := guard.PackageManagerGuardInteraction{
+		SetStatus:                ui.SetStatus,
+		ClearStatus:              ui.ClearStatus,
+		GetConfirmationOnMalware: ui.GetConfirmationOnMalware,
+		Block:                    ui.Block,
+	}
+
+	guardConfig := guard.DefaultPackageManagerGuardConfig()
+	guardConfig.DryRun = config.DryRun
+
+	proxy, err := guard.NewPackageManagerGuard(guardConfig, f.pm, packageResolver, analyzers, interaction)
+	if err != nil {
+		ui.Fatalf("Failed to create package manager guard: %s", err)
+	}
+
+	return proxy.Run(ctx, args)
+}