From 17e89057dbc9dcba5fb27f09cc3088c7efd739d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Aure=CC=81lie=20Delhaie?= <roboform@hotmail.fr>
Date: Wed, 13 Apr 2022 19:44:14 +0200
Subject: [PATCH] First version

---
 .idea/.gitignore   |  8 +++++
 .idea/archiver.iml |  9 +++++
 .idea/modules.xml  |  8 +++++
 README.md          |  3 ++
 go.mod             |  3 ++
 main.go            | 90 ++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 121 insertions(+)
 create mode 100644 .idea/.gitignore
 create mode 100644 .idea/archiver.iml
 create mode 100644 .idea/modules.xml
 create mode 100644 README.md
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/archiver.iml b/.idea/archiver.iml
new file mode 100644
index 0000000..5e764c4
--- /dev/null
+++ b/.idea/archiver.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 0000000..f027caf
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/archiver.iml" filepath="$PROJECT_DIR$/.idea/archiver.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1a1739e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# archiver
+
+This script allows to copy a folder to make a backup, I compress it in a .tar.gz file and I send it on a remote server with rsync
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..a67aac6
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module archiver
+
+go 1.18
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..3a9ba27
--- /dev/null
+++ b/main.go
@@ -0,0 +1,90 @@
+package main
+
+import (
+	"errors"
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"time"
+)
+
+func main() {
+	path := flag.String("path", "", "Path to the folder to archive")
+	backupFolder := flag.String("backup", "./archive", "Path to the backup folder")
+	count := flag.Int("count", 3, "Number of backup to keep in the archive")
+	flag.Parse()
+	if len(*path) == 0 {
+		fmt.Println("missing --path argument")
+		os.Exit(2)
+	}
+	if *count < 1 {
+		fmt.Println("--count must be greater than 0")
+		os.Exit(3)
+	}
+	if _, err := os.Stat(*path); err != nil {
+		err = os.MkdirAll(*path, 0750)
+		if err != nil {
+			fmt.Println(err)
+			os.Exit(4)
+		}
+	}
+	absSourcePath, err := filepath.Abs(*path)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(5)
+	}
+	absDstPath, err := filepath.Abs(*backupFolder)
+	if err != nil {
+		fmt.Println(err)
+		os.Exit(5)
+	}
+	if err := makeBackup(absSourcePath, absDstPath, *count); err != nil {
+		fmt.Println(err)
+		os.Exit(7)
+	}
+}
+
+// makeBackup make a backup
+func makeBackup(source, dst string, count int) error {
+	err := cleanOldBackup(dst, count-1)
+	if err != nil {
+		return err
+	}
+	name := time.Now().Format("2006_01_02__15_04_05")
+	output, err := exec.Command("cp", "-r", source, filepath.Join(dst, name)).CombinedOutput()
+	if err != nil {
+		return errors.New(string(output))
+	}
+	return nil
+}
+
+// cleanOldBackup clean up old archives so as not to exceed the quota
+func cleanOldBackup(backupFolder string, count int) error {
+	files, err := ioutil.ReadDir(backupFolder)
+	if err != nil {
+		return err
+	}
+	for len(files) > count {
+		oldestTime := time.Now()
+		var oldestFile os.FileInfo
+		for _, file := range files {
+
+			if file.ModTime().Before(oldestTime) {
+				oldestFile = file
+				oldestTime = file.ModTime()
+			}
+		}
+		err = os.RemoveAll(filepath.Join(backupFolder, oldestFile.Name()))
+		if err != nil {
+			return err
+		}
+		files, err = ioutil.ReadDir(backupFolder)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}