fix(license): add FilePath to results to allow for license path filtering via trivyignore file

docs/docs/configuration/filtering.md

@@ -494,4 +494,4 @@ Please refer to the [VEX documentation](../supply-chain/vex.md) for the details.
 
 
 [^1]: license name is used as id for `.trivyignore.yaml` files.
-[^2]: This doesn't work for package licenses. The `path` field can only be used for license files (licenses obtained using the [--license-full flag](../scanner/license.md#full-scanning)).
+[^2]: This doesn't work for os package licenses (e.g. apk, dpkg, rpm). For projects which manage dependencies through a dependency file (e.g. go.mod, yarn.lock) `path` should point to that particular file.

pkg/scanner/local/scan.go

@@ -297,7 +297,6 @@ func (s Scanner) scanLicenses(target types.ScanTarget, options types.ScanOptions
 				Confidence: 1.0,
 			})
 		}
-
 	}
 	results = append(results, types.Result{
 		Target:   "OS Packages",
@@ -312,10 +311,13 @@ func (s Scanner) scanLicenses(target types.ScanTarget, options types.ScanOptions
 			for _, license := range lib.Licenses {
 				category, severity := scanner.Scan(license)
 				langLicenses = append(langLicenses, types.DetectedLicense{
-					Severity:   severity,
-					Category:   category,
-					PkgName:    lib.Name,
-					Name:       license,
+					Severity: severity,
+					Category: category,
+					PkgName:  lib.Name,
+					Name:     license,
+					// Lock files use app.FilePath - https://github.com/aquasecurity/trivy/blob/6ccc0a554b07b05fd049f882a1825a0e1e0aabe1/pkg/fanal/types/artifact.go#L245-L246
+					// Applications use lib.FilePath - https://github.com/aquasecurity/trivy/blob/6ccc0a554b07b05fd049f882a1825a0e1e0aabe1/pkg/fanal/types/artifact.go#L93-L94
+					FilePath:   lo.Ternary(lib.FilePath != "", lib.FilePath, app.FilePath),
 					Confidence: 1.0,
 				})
 			}

pkg/scanner/local/scan_test.go

@@ -148,6 +148,127 @@ func TestScanner_Scan(t *testing.T) {
 				Eosl:   true,
 			},
 		},
+		{
+			name: "happy path license scanner",
+			args: args{
+				target:   "alpine:latest",
+				layerIDs: []string{"sha256:5216338b40a7b96416b8b9858974bbe4acc3096ee60acbc4dfb1ee02aecceb10"},
+				options: types.ScanOptions{
+					Scanners: types.Scanners{types.LicenseScanner},
+				},
+			},
+			fixtures: []string{"testdata/fixtures/happy.yaml"},
+			applyLayersExpectation: ApplierApplyLayersExpectation{
+				Args: ApplierApplyLayersArgs{
+					BlobIDs: []string{"sha256:5216338b40a7b96416b8b9858974bbe4acc3096ee60acbc4dfb1ee02aecceb10"},
+				},
+				Returns: ApplierApplyLayersReturns{
+					Detail: ftypes.ArtifactDetail{
+						OS: ftypes.OS{
+							Family: ftypes.Alpine,
+							Name:   "3.11",
+						},
+						Packages: []ftypes.Package{
+							{
+								Name:       "musl",
+								Version:    "1.2.3",
+								SrcName:    "musl",
+								SrcVersion: "1.2.3",
+								Licenses:   []string{"MIT"},
+								Layer: ftypes.Layer{
+									DiffID: "sha256:ebf12965380b39889c99a9c02e82ba465f887b45975b6e389d42e9e6a3857888",
+								},
+							},
+						},
+						Applications: []ftypes.Application{
+							{
+								Type:     ftypes.GoModule,
+								FilePath: "/app/go.mod",
+								Libraries: []ftypes.Package{
+									{
+										Name:     "github.com/google/uuid",
+										Version:  "1.6.0",
+										FilePath: "",
+										Layer: ftypes.Layer{
+											DiffID: "sha256:0ea33a93585cf1917ba522b2304634c3073654062d5282c1346322967790ef33",
+										},
+										Licenses: []string{"LGPL"},
+									},
+								},
+							},
+							{
+								Type:     ftypes.PythonPkg,
+								FilePath: "",
+								Libraries: []ftypes.Package{
+									{
+										Name:     "urllib3",
+										Version:  "3.2.1",
+										FilePath: "/usr/lib/python/site-packages/urllib3-3.2.1/METADATA",
+										Layer: ftypes.Layer{
+											DiffID: "sha256:0ea33a93585cf1917ba522b2304634c3073654062d5282c1346322967790ef33",
+										},
+										Licenses: []string{"MIT"},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			wantResults: types.Results{
+				{
+					Target: "OS Packages",
+					Class:  types.ClassLicense,
+					Licenses: []types.DetectedLicense{
+						{
+							Severity:   "UNKNOWN",
+							Category:   "unknown",
+							PkgName:    "musl",
+							Name:       "MIT",
+							Confidence: 1,
+						},
+					},
+				},
+				{
+					Target: "/app/go.mod",
+					Class:  types.ClassLicense,
+					Licenses: []types.DetectedLicense{
+						{
+							Severity:   "UNKNOWN",
+							Category:   "unknown",
+							PkgName:    "github.com/google/uuid",
+							FilePath:   "/app/go.mod",
+							Name:       "LGPL",
+							Confidence: 1,
+							Link:       "",
+						},
+					},
+				},
+				{
+					Target: "Python",
+					Class:  types.ClassLicense,
+					Licenses: []types.DetectedLicense{
+						{
+							Severity:   "UNKNOWN",
+							Category:   "unknown",
+							PkgName:    "urllib3",
+							FilePath:   "/usr/lib/python/site-packages/urllib3-3.2.1/METADATA",
+							Name:       "MIT",
+							Confidence: 1,
+						},
+					},
+				},
+				{
+					Target: "Loose File License(s)",
+					Class:  types.ClassLicenseFile,
+				},
+			},
+			wantOS: ftypes.OS{
+				Family: "alpine",
+				Name:   "3.11",
+				Eosl:   false,
+			},
+		},
 		{
 			name: "happy path with list all packages",
 			args: args{