// Package main provides a Go vanity import server for dappco.re.
//
// When a Go tool requests ?go-get=1, this server responds with HTML
// containing tags that map dappco.re module
// paths to their Git repositories on forge.lthn.io.
//
// For browser requests (no ?go-get=1), it redirects to the Forgejo
// repository web UI.
package main
import (
"fmt"
"log"
"net/http"
"os"
"strings"
)
var modules = map[string]string{
"core": "host-uk/core",
"build": "host-uk/build",
}
const (
forgeBase = "https://forge.lthn.io"
vanityHost = "dappco.re"
defaultAddr = ":8080"
)
func main() {
addr := os.Getenv("ADDR")
if addr == "" {
addr = defaultAddr
}
// Allow overriding forge base URL
forge := os.Getenv("FORGE_URL")
if forge == "" {
forge = forgeBase
}
// Parse additional modules from VANITY_MODULES env (format: "mod1=owner/repo,mod2=owner/repo")
if extra := os.Getenv("VANITY_MODULES"); extra != "" {
for _, entry := range strings.Split(extra, ",") {
parts := strings.SplitN(strings.TrimSpace(entry), "=", 2)
if len(parts) == 2 {
modules[parts[0]] = parts[1]
}
}
}
http.HandleFunc("/", handler(forge))
log.Printf("vanity-import listening on %s (%d modules)", addr, len(modules))
for mod, repo := range modules {
log.Printf(" %s/%s → %s/%s.git", vanityHost, mod, forge, repo)
}
log.Fatal(http.ListenAndServe(addr, nil))
}
func handler(forge string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Extract the first path segment as the module name
path := strings.TrimPrefix(r.URL.Path, "/")
if path == "" {
// Root request — redirect to forge org page
http.Redirect(w, r, forge+"/host-uk", http.StatusFound)
return
}
// Module is the first path segment (e.g., "core" from "/core/pkg/mcp")
mod := strings.SplitN(path, "/", 2)[0]
repo, ok := modules[mod]
if !ok {
http.NotFound(w, r)
return
}
// If go-get=1, serve the vanity import HTML
if r.URL.Query().Get("go-get") == "1" {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
fmt.Fprintf(w, `
Redirecting to %s/%s...
`, vanityHost, mod, forge, repo,
vanityHost, mod, forge, repo, forge, repo, forge, repo,
forge, repo,
forge, repo, forge, repo)
return
}
// Browser request — redirect to Forgejo
http.Redirect(w, r, forge+"/"+repo, http.StatusFound)
}
}