From 768b22ab031be36d65fbbd97b4600ad268f8d818 Mon Sep 17 00:00:00 2001
From: suguo <ysg@myschools.me>
Date: Thu, 1 Sep 2022 06:43:03 +0800
Subject: [PATCH] init

---
 .gitignore |  3 ++-
 go.mod     |  3 +++
 main.go    | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 1 deletion(-)
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
index f4d432a..c7ed815 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,4 +14,5 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
-
+.vscode/
+version
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..d46fd17
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module myschools.me/suguo/version
+
+go 1.19
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..5b6c568
--- /dev/null
+++ b/main.go
@@ -0,0 +1,65 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/user"
+	"strconv"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		return
+	}
+
+	u, err := user.Current()
+	if err != nil {
+		fmt.Print("none")
+		return
+	}
+	dir := fmt.Sprintf("%s/.version", u.HomeDir)
+	if err := os.MkdirAll(dir, os.ModePerm); err != nil {
+		fmt.Print("none")
+		return
+	}
+	fname := fmt.Sprintf(`%s/%s`, dir, os.Args[1])
+	v, err := versionGet(&fname)
+	if err != nil {
+		fmt.Print("none")
+	}
+	versionSet(&fname, v)
+	fmt.Print(v)
+}
+
+func versionGet(fname *string) (v uint64, err error) {
+	f, err := os.OpenFile(*fname, os.O_RDONLY|os.O_CREATE, 0600)
+	if err != nil {
+		return
+	}
+	defer f.Close()
+
+	b, err := ioutil.ReadAll(f)
+	if err != nil {
+		return
+	}
+
+	v, _ = strconv.ParseUint(string(b), 10, 64)
+	v++
+	return
+}
+
+func versionSet(fname *string, v uint64) error {
+	f, err := os.OpenFile(*fname, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	buf := strconv.FormatUint(v, 10)
+	if _, err := f.WriteString(buf); err != nil {
+		return err
+	}
+
+	return nil
+}