changed old manifest.toml to Packet.lua and some improvements for future 100% Packet.lua implementation

internal/packet/auxiliar_functions.go

@@ -0,0 +1,55 @@
+package packet
+
+import lua "github.com/yuin/gopher-lua"
+
+func getStringFromTable(table *lua.LTable, key string) string {
+	value := table.RawGetString(key)
+	if value.Type() == lua.LTString {
+		return value.String()
+	}
+	return ""
+}
+
+func getStringArrayFromTable(L *lua.LState, table *lua.LTable, key string) []string {
+	value := table.RawGetString(key)
+	if value.Type() != lua.LTTable {
+		return []string{}
+	}
+
+	arrayTable := value.(*lua.LTable)
+	var result []string
+
+	arrayTable.ForEach(func(_, value lua.LValue) {
+		if value.Type() == lua.LTString {
+			result = append(result, value.String())
+		}
+	})
+
+	return result
+}
+
+func getFunctionFromTable(table *lua.LTable, key string) *lua.LFunction {
+	value := table.RawGetString(key)
+	if value.Type() == lua.LTFunction {
+		return value.(*lua.LFunction)
+	}
+	return nil
+}
+
+func getDependenciesFromTable(L *lua.LState, table *lua.LTable, key string) map[string]string {
+	value := table.RawGetString(key)
+	if value.Type() != lua.LTTable {
+		return map[string]string{}
+	}
+
+	depsTable := value.(*lua.LTable)
+	dependencies := make(map[string]string)
+
+	depsTable.ForEach(func(key, value lua.LValue) {
+		if key.Type() == lua.LTString && value.Type() == lua.LTString {
+			dependencies[key.String()] = value.String()
+		}
+	})
+
+	return dependencies
+}

internal/packet/main.go

@@ -1,5 +1,19 @@
 package packet
 
+import (
+	"archive/tar"
+	"fmt"
+	"io"
+	"packets/configs"
+	errors_packets "packets/internal/errors"
+	"path/filepath"
+	"runtime"
+
+	"github.com/klauspost/compress/zstd"
+	"github.com/pelletier/go-toml/v2"
+	lua "github.com/yuin/gopher-lua"
+)
+
 type PacketLua struct {
 	Name         string
 	Id           string
@@ -14,5 +28,115 @@ type PacketLua struct {
 	GitUrl    string
 	GitBranch string
 
-	BuildDependencies string
+	BuildDependencies map[string]string
+
+	Prepare *lua.LFunction
+	Build   *lua.LFunction
+	Install *lua.LFunction
+	Remove  *lua.LFunction
+}
+
+// ReadPacket read a Packet.lua and alredy set global vars
+func ReadPacket(f []byte) (PacketLua, error) {
+	cfg, err := configs.GetConfigTOML()
+	if err != nil {
+		return PacketLua{}, err
+	}
+	L := lua.NewState()
+	defer L.Close()
+
+	osObject := L.GetGlobal("os").(*lua.LTable)
+	ioObject := L.GetGlobal("io").(*lua.LTable)
+
+	L.SetGlobal("os", lua.LNil)
+	L.SetGlobal("io", lua.LNil)
+
+	if err := L.DoString(string(f)); err != nil {
+		return PacketLua{}, err
+	}
+	L.SetGlobal("os", osObject)
+	L.SetGlobal("io", ioObject)
+
+	L.SetGlobal("BIN_DIR", lua.LString(cfg.Config.Bin_d))
+	L.SetGlobal("ARCH", lua.LString(runtime.GOARCH))
+	L.SetGlobal("OS", lua.LString(runtime.GOOS))
+
+	tableLua := L.Get(-1)
+
+	if tableLua.Type() != lua.LTTable {
+		return PacketLua{}, fmt.Errorf("invalid Packet.lua format: the file do not return a table")
+	}
+
+	table := tableLua.(*lua.LTable)
+
+	pkgTableLua := table.RawGetString("package")
+	if pkgTableLua.Type() != lua.LTTable {
+		return PacketLua{}, fmt.Errorf("invalid Packet.lua format: can't find package table")
+	}
+	pkgTable := pkgTableLua.(*lua.LTable)
+
+	packetLua := &PacketLua{
+		Name:        getStringFromTable(pkgTable, "name"),
+		Id:          getStringFromTable(pkgTable, "id"),
+		Version:     getStringFromTable(pkgTable, "version"),
+		Author:      getStringFromTable(pkgTable, "author"),
+		Description: getStringFromTable(pkgTable, "description"),
+		PkgType:     getStringFromTable(pkgTable, "type"),
+
+		Dependencies:      getDependenciesFromTable(L, pkgTable, "dependencies"),
+		BuildDependencies: getDependenciesFromTable(L, pkgTable, "build_dependencies"),
+
+		GitUrl:    getStringFromTable(pkgTable, "git_url"),
+		GitBranch: getStringFromTable(pkgTable, "git_branch"),
+
+		Prepare: getFunctionFromTable(pkgTable, "prepare"),
+		Build:   getFunctionFromTable(pkgTable, "build"),
+		Install: getFunctionFromTable(pkgTable, "install"),
+		Remove:  getFunctionFromTable(pkgTable, "remove"),
+	}
+
+	if packetLua.Install == nil || packetLua.Remove == nil {
+		return PacketLua{}, fmt.Errorf("install or remove function is not valid")
+	}
+
+	return *packetLua, nil
+}
+
+func (packetLua PacketLua) ExecuteRemove(L *lua.LState) error {
+	L.Push(packetLua.Remove)
+	return L.PCall(0, 0, nil)
+}
+
+func ReadPacketFromFile(file io.Reader) (PacketLua, error) {
+
+	zstdReader, err := zstd.NewReader(file)
+	if err != nil {
+		return PacketLua{}, err
+	}
+	defer zstdReader.Close()
+
+	tarReader := tar.NewReader(zstdReader)
+	for {
+		header, err := tarReader.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return PacketLua{}, err
+		}
+
+		if filepath.Base(header.Name) == "Packet.lua" {
+			decoder := toml.NewDecoder(tarReader)
+
+			var packetLua PacketLua
+
+			if err := decoder.Decode(&packetLua); err != nil {
+				return PacketLua{}, err
+			}
+
+			return packetLua, nil
+		}
+
+	}
+	return PacketLua{}, errors_packets.ErrCantFindPacketDotLua
 }

internal/packet/utils.go

@@ -0,0 +1 @@
+package packet