Reorganize. Update to use go modules.

2 files changed, 189 insertions, 0 deletions

diff --git a/archive/archive.go b/archive/archive.go
new file mode 100644
index 0000000..639a864
--- /dev/null
+++ b/archive/archive.go
@@ -0,0 +1,104 @@
+package archive
+
+import (
+	"archive/tar"
+	"path/filepath"
+
+	"compress/gzip"
+
+	"io"
+	"os"
+
+	"strings"
+)
+
+type Archive struct {
+	Output string
+	Input  []string
+	file   *os.File
+}
+
+func (a *Archive) Tar(compressionType string) error {
+	var err error
+	if a.file, err = os.Create(a.Output); err != nil {
+		return err
+	}
+
+	defer a.file.Close()
+
+	var twriter *tar.Writer
+
+	// Set the compression type... if any
+	switch compressionType {
+	case "gz":
+		gzwriter, err := gzip.NewWriterLevel(a.file, gzip.BestSpeed)
+		if err != nil {
+			return err
+		}
+		defer gzwriter.Close()
+		// Write to the gzip writer
+		twriter = tar.NewWriter(gzwriter)
+	default:
+		// Write directly to the file
+		twriter = tar.NewWriter(a.file)
+	}
+
+	// Close off the tar writer when we're done
+	defer twriter.Close()
+
+	for _, v := range a.Input {
+		if err := filepath.Walk(v, tarWalkfn(twriter)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+
+}
+
+func tarWalkfn(writer *tar.Writer) filepath.WalkFunc {
+	// This is an interesting trick to get around scoping issues
+	return func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if info.IsDir() {
+			return nil
+		}
+
+		f, err := os.Open(path)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		// Convert Windows paths to Unix paths
+		path = strings.Replace(path, "\\", "/", -1)
+
+		// TODO; See if tar.FileInfoheader() could be used instead
+		// without the pathing issues I encountered
+		h := &tar.Header{
+			Name: path,
+			Size: info.Size(),
+			// I don't like it... but it helps with platform compatibility
+			Mode:    0664,
+			ModTime: info.ModTime(),
+		}
+
+		err = writer.WriteHeader(h)
+		if err != nil {
+			return err
+		}
+
+		_, err = io.Copy(writer, f)
+		if err != nil {
+			// TODO: Figure out how to add more useful information to
+			// These errors
+			// fmt.Fprintln(os.Stderr, f.Name())
+			return err
+		}
+
+		return nil
+	}
+}
diff --git a/archive/unarchive.go b/archive/unarchive.go
new file mode 100644
index 0000000..8a5617e
--- /dev/null
+++ b/archive/unarchive.go
@@ -0,0 +1,85 @@
+package archive
+
+import (
+	"archive/tar"
+	fp "path/filepath"
+
+	"compress/gzip"
+
+	"io"
+	"os"
+
+	"strings"
+)
+
+type Unarchive struct {
+	Input     string
+	tarReader *tar.Reader
+}
+
+// Extracts a tar arcive to the current working directory
+// This will overwrite everything. So be careful
+func (u *Unarchive) UnTar(compressionType string) error {
+	f, err := os.Open(u.Input)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	var treader *tar.Reader
+
+	switch compressionType {
+	case "gz":
+		gzreader, err := gzip.NewReader(f)
+		if err != nil {
+			return err
+		}
+		// Read from the gzip reader instead of the file
+		treader = tar.NewReader(gzreader)
+	default:
+		// Read from the file directly
+		treader = tar.NewReader(f)
+	}
+
+	for {
+		hdr, err := treader.Next()
+		if err == io.EOF {
+			// We've reached the end! Whoee
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		// Fix windows slashes...
+		fileName := strings.Replace(hdr.Name, "\\", "/", -1)
+
+		info := hdr.FileInfo()
+		if info.IsDir() {
+			// I don't like hard-coded permissions but it
+			// it helps with overall platform compatibility
+			if err = os.MkdirAll(fileName, 0775); err != nil {
+				return err
+			}
+			continue
+		}
+
+		if err = os.MkdirAll(fp.Dir(fileName), 0775); err != nil {
+			return err
+		}
+
+		// Create a file handle to work with
+		// f, err := os.Create(fileName)
+		f, err := os.OpenFile(fileName, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0664)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+		if _, err := io.Copy(f, treader); err != nil {
+			return err
+		}
+
+	}
+
+	return nil
+}