Add build cmd in the cli

cmd/build.go

@@ -0,0 +1,99 @@
+// 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 cmd
+
+import (
+	"os"
+	"runtime"
+
+	"github.com/mudler/luet/pkg/compiler"
+	"github.com/mudler/luet/pkg/compiler/backend"
+	. "github.com/mudler/luet/pkg/logger"
+	pkg "github.com/mudler/luet/pkg/package"
+	tree "github.com/mudler/luet/pkg/tree"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+var buildCmd = &cobra.Command{
+	Use:   "build <cat> <name> <version>",
+	Short: "build a package or a tree",
+	Long:  `build packages or trees from luet tree definitions`,
+	Run: func(cmd *cobra.Command, args []string) {
+
+		src := viper.GetString("tree")
+		dst := viper.GetString("output")
+		concurrency := viper.GetInt("concurrency")
+		backendType := viper.GetString("backend")
+		privileged := viper.GetBool("privileged")
+
+		if len(args) != 3 {
+			Fatal("Incorrect number of arguments")
+		}
+
+		category := args[0]
+		name := args[1]
+		version := args[2]
+
+		var compilerBackend compiler.CompilerBackend
+
+		switch backendType {
+		case "img":
+			compilerBackend = backend.NewSimpleImgBackend()
+		case "docker":
+			compilerBackend = backend.NewSimpleDockerBackend()
+		}
+
+		generalRecipe := tree.NewCompilerRecipe()
+
+		Info("Loading", src)
+		err := generalRecipe.Load(src)
+		if err != nil {
+			Fatal("Error: " + err.Error())
+		}
+		compiler := compiler.NewLuetCompiler(compilerBackend, generalRecipe.Tree())
+		spec, err := compiler.FromPackage(&pkg.DefaultPackage{Name: name, Category: category, Version: version})
+		if err != nil {
+			Fatal("Error: " + err.Error())
+		}
+
+		spec.SetOutputPath(dst)
+		artifact, err := compiler.Compile(concurrency, privileged, spec)
+		if err != nil {
+			Fatal("Error: " + err.Error())
+		}
+
+		Info("Artifact generated:", artifact.GetPath())
+	},
+}
+
+func init() {
+	path, err := os.Getwd()
+	if err != nil {
+		Fatal(err)
+	}
+	buildCmd.Flags().String("tree", path, "Source luet tree")
+	viper.BindPFlag("tree", buildCmd.Flags().Lookup("tree"))
+	buildCmd.Flags().String("output", path, "Destination folder")
+	viper.BindPFlag("output", buildCmd.Flags().Lookup("output"))
+	buildCmd.Flags().String("backend", "docker", "backend used (docker,img)")
+	viper.BindPFlag("backend", buildCmd.Flags().Lookup("backend"))
+	buildCmd.Flags().Int("concurrency", runtime.NumCPU(), "Concurrency")
+	viper.BindPFlag("concurrency", buildCmd.Flags().Lookup("concurrency"))
+	buildCmd.Flags().Bool("privileged", false, "Privileged (Keep permissions)")
+	viper.BindPFlag("privileged", buildCmd.Flags().Lookup("privileged"))
+	RootCmd.AddCommand(buildCmd)
+}