Add dart support (#919)

Co-authored-by: Alex Goodman <alex.goodman@anchore.com>

test/integration/catalog_packages_cases_test.go

@@ -186,6 +186,19 @@ var dirOnlyTestCases = []testCase{
 			"alcaeus/mongo-php-adapter": "1.1.11",
 		},
 	},
+	{
+		name:        "find pubspec lock packages",
+		pkgType:     pkg.DartPubPkg,
+		pkgLanguage: pkg.Dart,
+		pkgInfo: map[string]string{
+			"ansicolor":  "1.1.1",
+			"archive":    "2.0.13",
+			"args":       "1.6.0",
+			"key_binder": "1.11.20",
+			"ale":        "3.3.0",
+			"analyzer":   "0.40.7",
+		},
+	},
 }
 
 var commonTestCases = []testCase{

test/integration/catalog_packages_test.go

@@ -1,9 +1,10 @@
 package integration
 
 import (
-	"github.com/stretchr/testify/require"
 	"testing"
 
+	"github.com/stretchr/testify/require"
+
 	"github.com/anchore/syft/syft/linux"
 	"github.com/anchore/syft/syft/pkg/cataloger"
 	"github.com/google/go-cmp/cmp"
@@ -64,6 +65,7 @@ func TestPkgCoverageImage(t *testing.T) {
 	// for image scans we should not expect to see any of the following package types
 	definedLanguages.Remove(pkg.Go.String())
 	definedLanguages.Remove(pkg.Rust.String())
+	definedLanguages.Remove(pkg.Dart.String())
 
 	observedPkgs := internal.NewStringSet()
 	definedPkgs := internal.NewStringSet()
@@ -75,6 +77,7 @@ func TestPkgCoverageImage(t *testing.T) {
 	definedPkgs.Remove(string(pkg.KbPkg))
 	definedPkgs.Remove(string(pkg.GoModulePkg))
 	definedPkgs.Remove(string(pkg.RustPkg))
+	definedPkgs.Remove(string(pkg.DartPubPkg))
 
 	var cases []testCase
 	cases = append(cases, commonTestCases...)

test/integration/test-fixtures/image-pkg-coverage/pkgs/dart/pubspec.lock

@@ -0,0 +1,49 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  ale:
+    dependency: transitive
+    description:
+      name: ale
+      url: "https://pub.hosted.org"
+    source: hosted
+    version: "3.3.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.40.7"
+  ansicolor:
+    dependency: transitive
+    description:
+      name: ansicolor
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.1"
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.13"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.0"
+  key_binder:
+    dependency: "direct main"
+    description:
+      path: "."
+      ref: HEAD
+      resolved-ref: "3f7b3a6350e73c7dcac45301c0e18fbd42af02f7"
+      url: "git@github.com:Workiva/key_binder.git"
+    source: git
+    version: "1.11.20"
+sdks:
+  dart: ">=2.12.0 <3.0.0"