fix: skip filling in empty fields in APK metadata

syft/pkg/cataloger/apkdb/parse_apk_db.go

@@ -71,6 +71,14 @@ func parseApkDB(_ source.FileResolver, env *generic.Environment, reader source.L
 			log.Warnf("unable to parse field data from line %q", line)
 			continue
 		}
+		if len(field.name) == 0 {
+			log.Warnf("failed to parse field name from line %q", line)
+			continue
+		}
+		if len(field.value) == 0 {
+			log.Debugf("line %q: parsed field %q appears to have an empty value, skipping", line, field.name)
+			continue
+		}
 
 		entryParsingInProgress = true
 

syft/pkg/cataloger/apkdb/parse_apk_db_test.go

@@ -160,6 +160,43 @@ func TestSinglePackageDetails(t *testing.T) {
 				},
 			},
 		},
+		{
+			fixture: "test-fixtures/empty-deps-and-provides",
+			expected: pkg.ApkMetadata{
+				Package:       "alpine-baselayout-data",
+				OriginPackage: "alpine-baselayout",
+				Version:       "3.4.0-r0",
+				Description:   "Alpine base dir structure and init scripts",
+				Maintainer:    "Natanael Copa <ncopa@alpinelinux.org>",
+				License:       "GPL-2.0-only",
+				Architecture:  "x86_64",
+				URL:           "https://git.alpinelinux.org/cgit/aports/tree/main/alpine-baselayout",
+				Size:          11664,
+				InstalledSize: 77824,
+				Dependencies:  []string{},
+				Provides:      []string{},
+				Checksum:      "Q15ffjKT28lB7iSXjzpI/eDdYRCwM=",
+				GitCommit:     "bd965a7ebf7fd8f07d7a0cc0d7375bf3e4eb9b24",
+				Files: []pkg.ApkFileRecord{
+					{Path: "/etc"},
+					{Path: "/etc/fstab"},
+					{Path: "/etc/group"},
+					{Path: "/etc/hostname"},
+					{Path: "/etc/hosts"},
+					{Path: "/etc/inittab"},
+					{Path: "/etc/modules"},
+					{Path: "/etc/mtab", OwnerUID: "0", OwnerGID: "0", Permissions: "0777"},
+					{Path: "/etc/nsswitch.conf"},
+					{Path: "/etc/passwd"},
+					{Path: "/etc/profile"},
+					{Path: "/etc/protocols"},
+					{Path: "/etc/services"},
+					{Path: "/etc/shadow", OwnerUID: "0", OwnerGID: "148", Permissions: "0640"},
+					{Path: "/etc/shells"},
+					{Path: "/etc/sysctl.conf"},
+				},
+			},
+		},
 		{
 			fixture: "test-fixtures/base",
 			expected: pkg.ApkMetadata{

syft/pkg/cataloger/apkdb/test-fixtures/empty-deps-and-provides

@@ -0,0 +1,35 @@
+P:alpine-baselayout-data
+V:3.4.0-r0
+A:x86_64
+L:GPL-2.0-only
+T:Alpine base dir structure and init scripts
+o:alpine-baselayout
+m:Natanael Copa <ncopa@alpinelinux.org>
+U:https://git.alpinelinux.org/cgit/aports/tree/main/alpine-baselayout
+D:
+p:
+c:bd965a7ebf7fd8f07d7a0cc0d7375bf3e4eb9b24
+i:[]
+t:1667573027
+S:11664
+I:77824
+k:0
+C:Q15ffjKT28lB7iSXjzpI/eDdYRCwM=
+F:etc
+R:fstab
+R:group
+R:hostname
+R:hosts
+R:inittab
+R:modules
+R:mtab
+a:0:0:0777
+R:nsswitch.conf
+R:passwd
+R:profile
+R:protocols
+R:services
+R:shadow
+a:0:148:0640
+R:shells
+R:sysctl.conf