Add pacman (alpm) parser support (#943)

Co-authored-by: Christopher Phillips <christopher.phillips@anchore.com>

test/integration/catalog_packages_cases_test.go

@@ -221,6 +221,13 @@ var dirOnlyTestCases = []testCase{
 }
 
 var commonTestCases = []testCase{
+	{
+		name:    "find alpm packages",
+		pkgType: pkg.AlpmPkg,
+		pkgInfo: map[string]string{
+			"pacman": "6.0.1-5",
+		},
+	},
 	{
 		name:    "find rpmdb packages",
 		pkgType: pkg.RpmPkg,

test/integration/catalog_packages_test.go

@@ -90,7 +90,6 @@ func TestPkgCoverageImage(t *testing.T) {
 			pkgCount := 0
 
 			for a := range sbom.Artifacts.PackageCatalog.Enumerate(c.pkgType) {
-
 				if a.Language.String() != "" {
 					observedLanguages.Add(a.Language.String())
 				}
@@ -167,7 +166,6 @@ func TestPkgCoverageDirectory(t *testing.T) {
 			actualPkgCount := 0
 
 			for actualPkg := range sbom.Artifacts.PackageCatalog.Enumerate(test.pkgType) {
-
 				observedLanguages.Add(actualPkg.Language.String())
 				observedPkgs.Add(string(actualPkg.Type))
 

test/integration/convert_test.go

@@ -42,32 +42,28 @@ func TestConvertCmd(t *testing.T) {
 			f, err := ioutil.TempFile("", "test-convert-sbom-")
 			require.NoError(t, err)
 			defer func() {
-				err := f.Close()
-				require.NoError(t, err)
 				os.Remove(f.Name())
 			}()
 
 			err = format.Encode(f, sbom)
 			require.NoError(t, err)
 
-			stdr, stdw, err := os.Pipe()
-			require.NoError(t, err)
-			originalStdout := os.Stdout
-			os.Stdout = stdw
-
 			ctx := context.Background()
 			app := &config.Application{Outputs: []string{format.ID().String()}}
 
+			// stdout reduction of test noise
+			rescue := os.Stdout // keep backup of the real stdout
+			os.Stdout, _ = os.OpenFile(os.DevNull, os.O_APPEND|os.O_WRONLY, os.ModeAppend)
+			defer func() {
+				os.Stdout = rescue
+			}()
+
 			err = convert.Run(ctx, app, []string{f.Name()})
 			require.NoError(t, err)
-			stdw.Close()
-
-			out, err := ioutil.ReadAll(stdr)
+			file, err := ioutil.ReadFile(f.Name())
 			require.NoError(t, err)
 
-			os.Stdout = originalStdout
-
-			formatFound := syft.IdentifyFormat(out)
+			formatFound := syft.IdentifyFormat(file)
 			if format.ID() == table.ID {
 				require.Nil(t, formatFound)
 				return

test/integration/test-fixtures/image-pkg-coverage/pkgs/var/lib/pacman/local/ALPM_DB_VERSION

@@ -0,0 +1 @@
+9

test/integration/test-fixtures/image-pkg-coverage/pkgs/var/lib/pacman/local/pacman-6.0.1-5/desc

@@ -0,0 +1,57 @@
+%NAME%
+pacman
+
+%VERSION%
+6.0.1-5
+
+%BASE%
+pacman
+
+%DESC%
+A library-based package manager with dependency support
+
+%URL%
+https://www.archlinux.org/pacman/
+
+%ARCH%
+x86_64
+
+%BUILDDATE%
+1652116331
+
+%INSTALLDATE%
+1654074247
+
+%PACKAGER%
+Morten Linderud <foxboron@archlinux.org>
+
+%SIZE%
+4925474
+
+%REASON%
+1
+
+%GROUPS%
+base-devel
+
+%LICENSE%
+GPL
+
+%VALIDATION%
+pgp
+
+%DEPENDS%
+bash
+glibc
+libarchive
+curl
+gpgme
+pacman-mirrorlist
+archlinux-keyring
+
+%OPTDEPENDS%
+perl-locale-gettext: translation support in makepkg-template
+
+%PROVIDES%
+libalpm.so=13-64
+

test/integration/test-fixtures/image-pkg-coverage/pkgs/var/lib/pacman/local/pacman-6.0.1-5/files

@@ -0,0 +1,30 @@
+%FILES%
+etc/
+etc/makepkg.conf
+etc/pacman.conf
+usr/
+usr/bin/
+usr/bin/makepkg
+usr/bin/makepkg-template
+usr/bin/pacman
+usr/bin/pacman-conf
+usr/bin/pacman-db-upgrade
+usr/bin/pacman-key
+usr/bin/repo-add
+usr/bin/repo-elephant
+usr/bin/repo-remove
+usr/bin/testpkg
+usr/bin/vercmp
+usr/include/
+usr/include/alpm.h
+usr/include/alpm_list.h
+usr/lib/
+usr/lib/libalpm.so
+usr/lib/libalpm.so.13
+usr/lib/libalpm.so.13.0.1
+usr/lib/pkgconfig/
+usr/lib/pkgconfig/libalpm.pc
+
+%BACKUP%
+etc/pacman.conf	de541390e52468165b96511c4665bff4
+etc/makepkg.conf	79fce043df7dfc676ae5ecb903762d8b