feat: Add find command for searching by regex

cmd/stbak/cmd/find.go

@@ -0,0 +1,74 @@
+package cmd
+
+import (
+	"context"
+	"regexp"
+
+	"github.com/pojntfx/stfs/pkg/converters"
+	"github.com/pojntfx/stfs/pkg/formatting"
+	"github.com/pojntfx/stfs/pkg/persisters"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	"github.com/volatiletech/sqlboiler/v4/boil"
+)
+
+const (
+	expressionFlag = "expression"
+)
+
+var findCmd = &cobra.Command{
+	Use:     "find",
+	Aliases: []string{"f"},
+	Short:   "Find a file or directory by matching against a regex",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if err := viper.BindPFlags(cmd.PersistentFlags()); err != nil {
+			return err
+		}
+
+		if viper.GetBool(verboseFlag) {
+			boil.DebugMode = true
+		}
+
+		metadataPersister := persisters.NewMetadataPersister(viper.GetString(metadataFlag))
+		if err := metadataPersister.Open(); err != nil {
+			return err
+		}
+
+		headers, err := metadataPersister.GetHeaders(context.Background())
+		if err != nil {
+			return err
+		}
+
+		first := true
+		for _, dbhdr := range headers {
+			if regexp.MustCompile(viper.GetString(expressionFlag)).Match([]byte(dbhdr.Name)) {
+				if first {
+					if err := formatting.PrintCSV(formatting.TARHeaderCSV); err != nil {
+						return err
+					}
+
+					first = false
+				}
+
+				hdr, err := converters.DBHeaderToTarHeader(dbhdr)
+				if err != nil {
+					return err
+				}
+
+				if err := formatting.PrintCSV(formatting.GetTARHeaderAsCSV(dbhdr.Record, dbhdr.Block, hdr)); err != nil {
+					return err
+				}
+			}
+		}
+
+		return nil
+	},
+}
+
+func init() {
+	findCmd.PersistentFlags().StringP(expressionFlag, "e", "", "Regex to match the file/directory name against")
+
+	viper.AutomaticEnv()
+
+	rootCmd.AddCommand(findCmd)
+}