Initial commit

log/compress.go

@@ -0,0 +1,52 @@
+package log
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/ulikunitz/xz"
+)
+
+func compress(path string) {
+	in, err := os.Open(path)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: failed to open: %v", path, err)
+		return
+	}
+
+	defer in.Close()
+
+	outPath := filepath.Join(filepath.Dir(path), "archives", filepath.Base(path)+".xz")
+
+	os.MkdirAll(filepath.Dir(outPath), 0700)
+
+	out, err := os.Create(outPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: failed to create target: %v", path, err)
+		return
+	}
+
+	defer out.Close()
+
+	w, err := xz.NewWriter(out)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: failed to create writer: %v", path, err)
+		return
+	}
+
+	if _, err := io.Copy(w, in); err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: write failed: %v", path, err)
+		return
+	}
+
+	if err := w.Close(); err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: close failed: %v", path, err)
+		return
+	}
+
+	if err := os.Remove(path); err != nil {
+		fmt.Fprintf(os.Stderr, "compress %s: failed to remove source: %v", path, err)
+	}
+}