feat(ci): add tools for download

.github/workflows/ddns-go.yml

@@ -3,7 +3,7 @@ name: ddns-go
 on:
   push:
   schedule:
-    - cron: '0 0 * * 0'
+    - cron: 0 0 * * 0
 
 jobs:
   cmp:
@@ -17,16 +17,14 @@ jobs:
     uses: WaterLemons2k/.github/.github/workflows/git.yml@main
     with:
       run: |
-        # 向 README.md 和 README.zh-CN.md 的第 4 行写入版本号
-        sed -i "4c Version: ${{ needs.cmp.outputs.version }}" README.md
-        sed -i "4c 版本：${{ needs.cmp.outputs.version }}" README.zh-CN.md
+        VERSION="${{ needs.cmp.outputs.version }}"
 
-        # https://unix.stackexchange.com/a/82610
-        for i in 1 2 3; do wget $(curl https://api.github.com/repos/jeessy2/ddns-go/releases/tags/${{ needs.cmp.outputs.version }} | jq -r '.assets[].browser_download_url' | grep linux_x86_64) && break || echo "Retry $i" && sleep 1; done # 失败时重试 3 次
-        tar -xvzf *.tar.gz ddns-go
-        rm *.tar.gz
-        echo "${{ needs.cmp.outputs.version }}" > VERSION
-      commit_message: 'feat: bump ddns-go to ${{ needs.cmp.outputs.version }}'
+        sed -i "4c Version: $VERSION" README.md
+        sed -i "4c 版本：$VERSION" README.zh-CN.md
+        echo "$VERSION" > VERSION
+
+        go run -C tools . $VERSION
+      commit_message: "feat: bump ddns-go to ${{ needs.cmp.outputs.version }}"
 
   docker:
     needs: [cmp, git]

Dockerfile

@@ -1,10 +1,12 @@
 FROM scratch
 LABEL maintainer="waterlemons2k <[email protected]>"
+
 COPY ca-certificates.crt /etc/ssl/certs/
 COPY ddns-go /app/
 COPY Shanghai /usr/share/zoneinfo/Asia/
+
 ENV TZ=Asia/Shanghai
 EXPOSE 9876
 
 ENTRYPOINT ["/app/ddns-go"]
-CMD ["-l", ":9876", "-f", "300"]
+CMD ["-l", ":9876", "-f", "300"]

README.md

@@ -33,4 +33,4 @@ If you need the minimum image size and don't have the above requirements, you ca
 
   ```bash
   docker run -d --name ddns-go --restart=always -p 9876:9876 -v /opt/ddns-go:/root waterlemons2k/ddns-go
-  ```
+  ```

README.zh-CN.md

@@ -15,7 +15,7 @@
 
 ## 使用
 
-- 挂载主机目录, 使用docker host模式。可把 `/opt/ddns-go` 替换为你主机任意目录, 配置文件为隐藏文件
+- 挂载主机目录, 使用 docker host 模式。可把 `/opt/ddns-go` 替换为你主机任意目录, 配置文件为隐藏文件
 
   ```bash
   docker run -d --name ddns-go --restart=always --net=host -v /opt/ddns-go:/root waterlemons2k/ddns-go
@@ -29,8 +29,8 @@
   docker run -d --name ddns-go --restart=always --net=host -v /opt/ddns-go:/root waterlemons2k/ddns-go -l :9877 -f 600
   ```
 
-- [可选] 不使用docker host模式
+- [可选] 不使用 docker host 模式
 
   ```bash
   docker run -d --name ddns-go --restart=always -p 9876:9876 -v /opt/ddns-go:/root waterlemons2k/ddns-go
-  ```
+  ```

tools/download.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/WaterLemons2k/Docker-ddns-go/tools/json"
+	"github.com/WaterLemons2k/Docker-ddns-go/tools/untar"
+)
+
+// Release represents a GitHub release.
+//
+// https://docs.github.com/en/rest/releases/releases#get-a-release-by-tag-name
+type Release struct {
+	Assets []Asset `json:"assets"`
+}
+
+// Asset represents a GitHub release asset.
+type Asset struct {
+	Name string `json:"name"`
+	URL  string `json:"browser_download_url"`
+}
+
+const (
+	// assetName indicates that the file with assetName in the asset will be downloaded.
+	assetName = "linux_x86_64"
+
+	// repo is the name of the GitHub repository without the owner part.
+	repo = "ddns-go"
+)
+
+var client = &http.Client{Timeout: 10 * time.Second}
+
+func main() {
+	if len(os.Args) != 2 {
+		fmt.Println("Usage: go run -C tools . <version>")
+		return
+	}
+	version := os.Args[1]
+
+	url := fmt.Sprintf("https://api.github.com/repos/jeessy2/%s/releases/tags/v%s", repo, version)
+
+	body := getBody(url)
+	defer body.Close()
+
+	var release Release
+	if err := json.Parse(body, &release); err != nil {
+		log.Fatal(err)
+	}
+
+	for _, asset := range release.Assets {
+		// We only focus on asset with assetName
+		if !strings.Contains(asset.Name, assetName) {
+			continue
+		}
+
+		body := getBody(asset.URL)
+		defer body.Close()
+		fmt.Println(asset.Name, "downloaded. Extracting", repo, "from the tar.gz file...")
+
+		// Extracts the file with repo from the tar.gz file
+		untar.SpecificFile(body, repo)
+		break
+	}
+}
+
+// getBody gets the response body from the given url.
+func getBody(url string) io.ReadCloser {
+	resp, err := client.Get(url)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	return resp.Body
+}

tools/go.mod

@@ -0,0 +1,3 @@
+module github.com/WaterLemons2k/Docker-ddns-go/tools
+
+go 1.20

tools/json/json.go

@@ -0,0 +1,16 @@
+package json
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// Parse parses the JSON-encoded body and stores the result in the value pointed to by v.
+func Parse(body io.Reader, v any) error {
+	data, err := io.ReadAll(body)
+	if err != nil {
+		return err
+	}
+
+	return json.Unmarshal(data, v)
+}

tools/untar/untar.go

@@ -0,0 +1,50 @@
+// Package untar untars a tarball to disk.
+package untar
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// SpecificFile extracts the file with the specified filename from
+// the tar.gz file in src and writes it to the file.
+func SpecificFile(src io.Reader, filename string) {
+	gz, err := gzip.NewReader(src)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer gz.Close()
+
+	t := tar.NewReader(gz)
+	for {
+		header, err := t.Next()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+
+			log.Fatal(err)
+		}
+
+		// Extracts only regular file with the specified filename
+		if !(header.Typeflag == tar.TypeReg && strings.Contains(header.Name, filename)) {
+			continue
+		}
+
+		// Write the extracted file to the parent directory of the executable
+		out, err := os.Create(filepath.Join("..", header.Name))
+		if err != nil {
+			log.Fatal(err)
+		}
+		defer out.Close()
+
+		if _, err = io.Copy(out, t); err != nil {
+			log.Fatal(err)
+		}
+	}
+}