add temporary targeting ability

main.go

@@ -99,6 +99,7 @@ var (
 	githubScanIssueComments = githubScan.Flag("issue-comments", "Include issue descriptions and comments in scan.").Bool()
 	githubScanPRComments    = githubScan.Flag("pr-comments", "Include pull request descriptions and comments in scan.").Bool()
 	githubScanGistComments  = githubScan.Flag("gist-comments", "Include gist comments in scan.").Bool()
+	githubTarget            = githubScan.Flag("target", "scan a target").Hidden().String()
 
 	// GitHub Cross Fork Object Reference Experimental Feature
 	githubExperimentalScan = cli.Command("github-experimental", "Run an experimental GitHub scan. Must specify at least one experimental sub-module to run: object-discovery.")
@@ -627,6 +628,7 @@ func runSingleScan(ctx context.Context, cmd string, cfg engine.Config) (metrics,
 			IncludePullRequestComments: *githubScanPRComments,
 			IncludeGistComments:        *githubScanGistComments,
 			Filter:                     filter,
+			Target:                     *githubTarget,
 		}
 		if err := eng.ScanGitHub(ctx, cfg); err != nil {
 			return scanMetrics, fmt.Errorf("failed to scan Github: %v", err)

pkg/engine/github.go

@@ -1,7 +1,10 @@
 package engine
 
 import (
+	"strings"
+
 	gogit "github.com/go-git/go-git/v5"
+	"github.com/trufflesecurity/trufflehog/v3/pkg/pb/source_metadatapb"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/known/anypb"
 
@@ -58,6 +61,24 @@ func (e *Engine) ScanGitHub(ctx context.Context, c sources.GithubConfig) error {
 		return err
 	}
 	githubSource.WithScanOptions(scanOptions)
+
+	if c.Target != "" {
+		parts := strings.Split(c.Target, "@")
+		target := sources.ChunkingTarget{
+			QueryCriteria: &source_metadatapb.MetaData{
+				Data: &source_metadatapb.MetaData_Github{
+					Github: &source_metadatapb.Github{
+						Link:   c.Repos[0],
+						File:   parts[0],
+						Commit: parts[1],
+					},
+				},
+			},
+		}
+		_, err = e.sourceManager.Run(ctx, sourceName, githubSource, target)
+		return err
+	}
+
 	_, err = e.sourceManager.Run(ctx, sourceName, githubSource)
 	return err
 }

pkg/sources/sources.go

@@ -236,6 +236,8 @@ type GithubConfig struct {
 	SkipBinaries bool
 	// IncludeWikis indicates whether to include repository wikis in the scan.
 	IncludeWikis bool
+
+	Target string
 }
 
 // GitHubExperimentalConfig defines the optional configuration for an experimental GitHub source.