commit 992706d9b77cdcac115d9a9482786885a3bf523b
Author: Tovi Jaeschke-Rogers <tovi.jaeschke-rogers@four.io>
Date:   Thu Jul 8 05:59:53 2021 +0930

    Add Tar archive functionality

diff --git a/Archive/Archive.go b/Archive/Archive.go
new file mode 100644
index 0000000..8d0e0b3
--- /dev/null
+++ b/Archive/Archive.go
@@ -0,0 +1,129 @@
+package Archive
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func Gzip(source, target string) error {
+	var (
+		reader, writer *os.File
+		archiver       *gzip.Writer
+		filename       string
+		e              error
+	)
+
+	reader, e = os.Open(source)
+	if e != nil {
+		return e
+	}
+
+	//filename = filepath.Base(source)
+	//target = filepath.Join(target, fmt.Sprintf("%s.gz", filename))
+
+	writer, e = os.Create(target)
+	if e != nil {
+		return e
+	}
+
+	defer writer.Close()
+
+	archiver = gzip.NewWriter(writer)
+	archiver.Name = filename
+	defer archiver.Close()
+
+	_, e = io.Copy(archiver, reader)
+	return e
+}
+
+func Tar(source, target string) error {
+	var (
+		tarfile, file *os.File
+		tarball       *tar.Writer
+		info          os.FileInfo
+		header        *tar.Header
+		e             error
+	)
+
+	tarfile, e = os.Create(target)
+	if e != nil {
+		return e
+	}
+	defer tarfile.Close()
+
+	tarball = tar.NewWriter(tarfile)
+	defer tarball.Close()
+
+	info, e = os.Stat(source)
+	if e != nil {
+		return e
+	}
+
+	var baseDir string
+	if info.IsDir() {
+		baseDir = filepath.Base(source)
+	}
+
+	return filepath.Walk(source,
+		func(path string, info os.FileInfo, e error) error {
+			if e != nil {
+				return e
+			}
+
+			header, e = tar.FileInfoHeader(info, info.Name())
+			if e != nil {
+				return e
+			}
+
+			if baseDir != "" {
+				header.Name = filepath.Join(
+					baseDir,
+					strings.TrimPrefix(
+						strings.Join(strings.Split(path, "/")[1:], "/"),
+						source,
+					),
+				)
+			}
+
+			e = tarball.WriteHeader(header)
+			if e != nil {
+				return e
+			}
+
+			if info.IsDir() {
+				return nil
+			}
+
+			file, e = os.Open(path)
+			if e != nil {
+				return e
+			}
+			defer file.Close()
+
+			_, e = io.Copy(tarball, file)
+			return e
+		})
+}
+
+func TarGzip(source, target string) error {
+	var (
+		tarPath string = strings.ReplaceAll(target, ".gz", "")
+		e       error
+	)
+
+	e = Tar(source, tarPath)
+	if e != nil {
+		return e
+	}
+
+	e = Gzip(tarPath, target)
+	if e != nil {
+		return e
+	}
+
+	return os.Remove(tarPath)
+}
diff --git a/Archive/Unarchive.go b/Archive/Unarchive.go
new file mode 100644
index 0000000..eaa2530
--- /dev/null
+++ b/Archive/Unarchive.go
@@ -0,0 +1,111 @@
+package Archive
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"io"
+	"io/fs"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+func UnGzip(source, target string) error {
+	var (
+		reader, writer *os.File
+		archive        *gzip.Reader
+		e              error
+	)
+
+	reader, e = os.Open(source)
+	if e != nil {
+		return e
+	}
+	defer reader.Close()
+
+	archive, e = gzip.NewReader(reader)
+	if e != nil {
+		return e
+	}
+	defer archive.Close()
+
+	target = filepath.Join(target, archive.Name)
+
+	writer, e = os.Create(target)
+	if e != nil {
+		return e
+	}
+	defer writer.Close()
+
+	_, e = io.Copy(writer, archive)
+	return e
+}
+
+func Untar(tarball, target string) error {
+	var (
+		reader    *os.File
+		tarReader *tar.Reader
+		header    *tar.Header
+		info      fs.FileInfo
+		file      *os.File
+		path      string
+		e         error
+	)
+
+	reader, e = os.Open(tarball)
+	if e != nil {
+		return e
+	}
+
+	defer reader.Close()
+	tarReader = tar.NewReader(reader)
+
+	for {
+		header, e = tarReader.Next()
+		if e == io.EOF {
+			break
+		}
+		if e != nil {
+			return e
+		}
+
+		path = "/" + strings.Join(strings.Split(header.Name, "/")[1:], "/")
+
+		info = header.FileInfo()
+		if info.IsDir() {
+			e = os.MkdirAll(path, info.Mode())
+			if e != nil {
+				return e
+			}
+			continue
+		}
+
+		file, e = os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, info.Mode())
+		if e != nil {
+			return e
+		}
+
+		defer file.Close()
+
+		_, e = io.Copy(file, tarReader)
+		if e != nil {
+			return e
+		}
+	}
+
+	return nil
+}
+
+func UntarGzip(source, target string) error {
+	var (
+		tarPath string = strings.ReplaceAll(source, ".gz", "")
+		e       error
+	)
+
+	e = UnGzip(source, tarPath)
+	if e != nil {
+		return e
+	}
+
+	return Untar(tarPath, target)
+}
diff --git a/Client/Database/Init.go b/Client/Database/Init.go
new file mode 100644
index 0000000..9410e25
--- /dev/null
+++ b/Client/Database/Init.go
@@ -0,0 +1,24 @@
+package Database
+
+import (
+	"database/sql"
+	"log"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+var (
+	DB *sql.DB
+)
+
+func init() {
+	var e error
+	DB, e = sql.Open("sqlite3", "./foo.db")
+	if e != nil {
+		panic(e)
+	}
+}
+
+func InitDB() {
+	log.Println("Initialising Database...")
+}
diff --git a/Client/main.go b/Client/main.go
new file mode 100644
index 0000000..4675230
--- /dev/null
+++ b/Client/main.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+
+	"PackageManager/Archive"
+)
+
+func main() {
+	//e := Archive.TarGzip("/tmp/test", "/tmp/test.tar.gz")
+	e := Archive.UntarGzip("/tmp/test.tar.gz", "/tmp/test")
+	fmt.Println(e)
+}