Ensure code DB path exists & exclude patterns option (#345)

Signed-off-by: Omkar Phansopkar <omkarphansopkar@gmail.com>

cmd/code/scan.go

@@ -2,6 +2,7 @@ package code
 
 import (
 	"context"
+	"regexp"
 
 	"github.com/safedep/vet/internal/command"
 	"github.com/safedep/vet/internal/ui"
@@ -15,6 +16,7 @@ var (
 	dbPath                    string
 	appDirs                   []string
 	importDirs                []string
+	excludePatterns           []string
 	skipDependencyUsagePlugin bool
 )
 
@@ -31,6 +33,8 @@ func newScanCommand() *cobra.Command {
 	cmd.Flags().StringVar(&dbPath, "db", "", "Path to create the sqlite database")
 	cmd.Flags().StringArrayVar(&appDirs, "app", []string{"."}, "Directories to scan for application code files")
 	cmd.Flags().StringArrayVar(&importDirs, "import-dir", []string{}, "Directories to scan for import files")
+	cmd.Flags().StringArrayVarP(&excludePatterns, "exclude", "", []string{},
+		"Name patterns to ignore while scanning a codebase")
 	cmd.Flags().BoolVar(&skipDependencyUsagePlugin, "skip-dependency-usage-plugin", false, "Skip dependency usage plugin analysis")
 
 	_ = cmd.MarkFlagRequired("db")
@@ -59,9 +63,15 @@ func internalStartScan() error {
 		return err
 	}
 
+	excludePatternsRegexps := []*regexp.Regexp{}
+	for _, pattern := range excludePatterns {
+		excludePatternsRegexps = append(excludePatternsRegexps, regexp.MustCompile(pattern))
+	}
+
 	codeScanner, err := code.NewScanner(code.ScannerConfig{
 		AppDirectories:            appDirs,
 		ImportDirectories:         importDirs,
+		ExcludePatterns:           excludePatternsRegexps,
 		Languages:                 allowedLanguages,
 		SkipDependencyUsagePlugin: skipDependencyUsagePlugin,
 		Callbacks: &code.ScannerCallbackRegistry{

pkg/storage/ent_sqlite.go

@@ -3,6 +3,8 @@ package storage
 import (
 	"context"
 	"fmt"
+	"os"
+	"path/filepath"
 
 	_ "github.com/mattn/go-sqlite3"
 	"github.com/safedep/vet/ent"
@@ -29,6 +31,12 @@ func NewEntSqliteStorage(config EntSqliteClientConfig) (Storage[*ent.Client], er
 		mode = "ro"
 	}
 
+	// Ensure the path exists
+	dir := filepath.Dir(config.Path)
+	if err := os.MkdirAll(dir, os.ModePerm); err != nil {
+		return nil, fmt.Errorf("failed to create DB path %s: %w", dir, err)
+	}
+
 	dbConn := fmt.Sprintf("file:%s?mode=%s&cache=private&_fk=1", config.Path, mode)
 	client, err := ent.Open("sqlite3", dbConn)
 	if err != nil {