Add treebuilder interface and Gentoo prototype

pkg/tree/builder.go

@@ -0,0 +1,28 @@
+// Copyright © 2019 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 tree
+
+import (
+	pkg "github.com/mudler/luet/pkg/package"
+)
+
+// reads a luet tree and generates the package lists
+type Builder interface {
+	Scan(string) error // compiles a tree
+	Load(string) error // pre-scanned tree
+
+	Generate() (pkg.PackageSet, error) // generates world
+}

pkg/tree/builder/gentoo/builder_suite_test.go

@@ -0,0 +1,28 @@
+// Copyright © 2019 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 gentoo_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestGentooBuilder(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Gentoo Suite")
+}

pkg/tree/builder/gentoo/gentoo.go

@@ -0,0 +1,71 @@
+// Copyright © 2019 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 gentoo
+
+// NOTE: Look here as an example of the builder definition executor
+// https://gist.github.com/adnaan/6ca68c7985c6f851def3
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	tree "github.com/mudler/luet/pkg/tree"
+
+	pkg "github.com/mudler/luet/pkg/package"
+)
+
+func NewGentooBuilder(e EbuildParser) tree.Parser {
+	return &GentooBuilder{EbuildParser: e}
+}
+
+type GentooBuilder struct{ EbuildParser EbuildParser }
+
+type GentooTree struct{ Packages pkg.PackageSet }
+
+type EbuildParser interface {
+	ScanEbuild(path string) ([]pkg.Package, error)
+}
+
+func (gt *GentooTree) GetPackageSet() pkg.PackageSet {
+	return gt.Packages
+}
+
+func (gb *GentooBuilder) Generate(dir string) (pkg.Tree, error) {
+	tree := &GentooTree{Packages: pkg.NewPackages([]pkg.Package{})}
+
+	err := filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() {
+			return nil
+		}
+		if strings.Contains(info.Name(), "ebuild") {
+			pkgs, err := gb.EbuildParser.ScanEbuild(path)
+			if err != nil {
+				return err
+			}
+			tree.Packages.AddPackages(pkgs)
+
+		}
+		return nil
+	})
+	if err != nil {
+		return tree, err
+	}
+	return tree, nil
+}

pkg/tree/builder/gentoo/gentoo_test.go

@@ -0,0 +1,44 @@
+// Copyright © 2019 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 gentoo_test
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	pkg "github.com/mudler/luet/pkg/package"
+	. "github.com/mudler/luet/pkg/tree/builder/gentoo"
+)
+
+type FakeParser struct {
+}
+
+func (f *FakeParser) ScanEbuild(path string) ([]pkg.Package, error) {
+	return []pkg.Package{&pkg.DefaultPackage{Name: "Fake"}}, nil
+}
+
+var _ = Describe("GentooBuilder", func() {
+
+	Context("Simple test", func() {
+		It("parses correctly deps", func() {
+			gb := NewGentooBuilder(&FakeParser{})
+			tree, err := gb.Generate("../../../../tests/fixtures/overlay")
+			Expect(err).ToNot(HaveOccurred())
+			Expect(len(tree.GetPackageSet().GetPackages())).To(Equal(11))
+		})
+	})
+
+})

pkg/tree/parser.go

@@ -0,0 +1,23 @@
+// Copyright © 2019 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 tree
+
+import pkg "github.com/mudler/luet/pkg/package"
+
+// parses ebuilds (?) and generates data which is readable by the builder
+type Parser interface {
+	Generate(string) (pkg.Tree, error) // Generate scannable luet tree (by builder)
+}

pkg/tree/tree_suite_test.go

@@ -0,0 +1,28 @@
+// Copyright © 2019 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 tree_test
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestTree(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Tree Suite")
+}