Initial commit

2021-06-13 19:15:21 +08:00 · 2021-06-13 19:15:21 +08:00 · 2e881b11ef
commit 2e881b11ef
3 changed files with 134 additions and 0 deletions
--- a/config.json
+++ b/config.json
@ -0,0 +1,16 @@
+{
+	"__comment__": "What comment? Just go read the code.",
+
+	"GitServerPrefix": "https://git.edgaru089.ml",
+	"GoSourceFile": "https://git.edgaru089.ml/{/path}/src/branch/master{/dir}",
+	"GoSourceLine": "https://git.edgaru089.ml/{/path}/src/branch/master{/dir}/{file}#L{line}",
+
+	"Repos": {
+		"go/gl02": {
+			"ImportPath": "edgaru089.ml/go/gl02",
+			"ShortPath": "go/gl02",
+			"RepoType": "git",
+			"RepoPath": "https://git.edgaru089.ml/go/gl02.git"
+		}
+	}
+}
--- a/main.go
+++ b/main.go
@ -0,0 +1,107 @@
+package main
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"html/template"
+	"log"
+	"net/http"
+	"os"
+
+	_ "embed"
+)
+
+type Repo struct {
+	ImportPath string // like example.com/package/code
+	ShortPath  string // like package/code
+
+	RepoType string // like git or svn
+	RepoPath string // like https://git.example.com/package/code.git or git@git.example.com:package/code.git
+}
+
+type Config struct {
+	GitServerPrefix string // Like https://github.com or https://git.example.com (without ending slash)
+
+	// go-source tag strings. Example:
+	//     GoSourceFile: https://git.example.com/{/path}/src/branch/master{/dir}
+	//     GoSourceLine: https://git.example.com/{/path}/src/branch/master{/dir}/{file}#L{line}
+	GoSourceFile, GoSourceLine string
+
+	Repos map[string]*Repo // mapped by ShortPath, like package/code
+}
+
+//go:embed template.html
+var httpTemplate string
+
+var (
+	ConfigFile, TemplateFile string
+	ListenAddress            string
+)
+
+func init() {
+	flag.StringVar(&ConfigFile, "config", "config.json", "Config file")
+	flag.StringVar(&TemplateFile, "template", "template.html", "template HTML file")
+	flag.StringVar(&ListenAddress, "listen", "0.0.0.0:32148", "listen address")
+}
+
+type Server struct {
+	config   Config
+	template *template.Template
+}
+
+func (s *Server) ServeHTTP(resp http.ResponseWriter, req *http.Request) {
+	log.Print("request: ", req.URL.Path)
+	id := req.URL.Path[1:]
+	if repo, ok := s.config.Repos[id]; ok {
+		err := s.template.Execute(resp, repo)
+		if err != nil {
+			resp.WriteHeader(500)
+			resp.Write([]byte("Internal Server Error\n\n"))
+			resp.Write([]byte(fmt.Sprintf("Error: Executing Template: %s, id=%s\n\nRepo=%v", err.Error(), id, repo)))
+		}
+	} else {
+		resp.WriteHeader(404)
+	}
+}
+
+func main() {
+	var c Config
+
+	flag.Parse()
+
+	file, err := os.Open(ConfigFile)
+	if err != nil {
+		fmt.Fprint(os.Stderr, "cannot open config file: ", err)
+		os.Exit(1)
+	}
+
+	dec := json.NewDecoder(file)
+	err = dec.Decode(&c)
+	if err != nil {
+		fmt.Fprint(os.Stderr, "error parsing config file:", err)
+		os.Exit(1)
+	}
+
+	tempbyte, err := os.ReadFile(TemplateFile)
+	if err != nil {
+		fmt.Fprint(os.Stderr, "error reading template file:", err)
+		os.Exit(1)
+	}
+
+	s := &Server{config: c, template: template.New("")}
+	s.template.Funcs(template.FuncMap{
+		"config": func() Config {
+			return c
+		},
+	})
+	_, err = s.template.Parse(string(tempbyte))
+	if err != nil {
+		fmt.Fprint(os.Stderr, "error parsing template file:", err)
+		os.Exit(1)
+	}
+
+	log.Print("listening on ", ListenAddress)
+	http.ListenAndServe(ListenAddress, s)
+
+}
--- a/template.html
+++ b/template.html
@ -0,0 +1,11 @@
+<!doctype html>
+<html>
+	<head>
+		<meta name="go-import" content="{{.ImportPath}} {{.RepoType}} {{.RepoPath}}">
+		<meta name="go-source" content="{{.ImportPath}} _ {{config.GitServerPrefix -}} / {{- .ShortPath -}} /src/branch/master{/dir} {{config.GitServerPrefix -}} / {{- .ShortPath -}} /src/branch/master{/dir}/{file}#L{line}">
+	</head>
+	<body>
+		go get {{.ImportPath}}
+	</body>
+</html>
+