Extract with new image API

pkg/api/core/image/extract_test.go

@@ -0,0 +1,110 @@
+// Copyright © 2021 Ettore Di Giacinto <mudler@gentoo.org>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this program; if not, see <http://www.gnu.org/licenses/>.
+
+package image_test
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+
+	"github.com/google/go-containerregistry/pkg/name"
+	v1 "github.com/google/go-containerregistry/pkg/v1"
+	daemon "github.com/google/go-containerregistry/pkg/v1/daemon"
+	. "github.com/mudler/luet/pkg/api/core/image"
+	"github.com/mudler/luet/pkg/api/core/types"
+	"github.com/mudler/luet/pkg/helpers/file"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Extract", func() {
+	Context("extract files from images", func() {
+		Context("ExtractFiles", func() {
+			ctx := types.NewContext()
+			var tmpfile *os.File
+			var ref name.Reference
+			var img v1.Image
+			var err error
+
+			BeforeEach(func() {
+				ctx = types.NewContext()
+
+				tmpfile, err = ioutil.TempFile("", "extract")
+				Expect(err).ToNot(HaveOccurred())
+				defer os.RemoveAll(tmpfile.Name()) // clean up
+
+				ref, err = name.ParseReference("alpine")
+				Expect(err).ToNot(HaveOccurred())
+
+				img, err = daemon.Image(ref)
+				Expect(err).ToNot(HaveOccurred())
+			})
+
+			It("Extract all files", func() {
+				tmpdir, err := Extract(
+					ctx,
+					img,
+					ExtractFiles(ctx, "", []string{}, []string{}),
+				)
+				Expect(err).ToNot(HaveOccurred())
+				defer os.RemoveAll(tmpdir) // clean up
+
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "bin"))).To(BeTrue())
+				Expect(file.Exists(filepath.Join(tmpdir, "bin", "sh"))).To(BeTrue())
+			})
+
+			It("Extract specific dir", func() {
+				tmpdir, err := Extract(
+					ctx,
+					img,
+					ExtractFiles(ctx, "usr", []string{}, []string{}),
+				)
+				Expect(err).ToNot(HaveOccurred())
+				defer os.RemoveAll(tmpdir) // clean up
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "sbin"))).To(BeTrue())
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "bin"))).To(BeTrue())
+				Expect(file.Exists(filepath.Join(tmpdir, "bin", "sh"))).To(BeFalse())
+			})
+
+			It("Extract a dir with includes/excludes", func() {
+				tmpdir, err := Extract(
+					ctx,
+					img,
+					ExtractFiles(ctx, "usr", []string{"bin"}, []string{"sbin"}),
+				)
+				Expect(err).ToNot(HaveOccurred())
+				defer os.RemoveAll(tmpdir) // clean up
+
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "bin"))).To(BeTrue())
+				Expect(file.Exists(filepath.Join(tmpdir, "bin", "sh"))).To(BeFalse())
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "sbin"))).To(BeFalse())
+			})
+
+			It("Extract with includes/excludes", func() {
+				tmpdir, err := Extract(
+					ctx,
+					img,
+					ExtractFiles(ctx, "", []string{"usr", "usr/bin"}, []string{"^bin"}),
+				)
+				Expect(err).ToNot(HaveOccurred())
+				defer os.RemoveAll(tmpdir) // clean up
+
+				Expect(file.Exists(filepath.Join(tmpdir, "usr", "bin"))).To(BeTrue())
+				Expect(file.Exists(filepath.Join(tmpdir, "bin", "sh"))).To(BeFalse())
+			})
+		})
+	})
+})