chore(quinistry): Prepare for depot merge

fun/quinistry/main.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+)
+
+func main() {
+	log.Println("Starting quinistry")
+
+	image := GetImageOfCurrentExecutable()
+
+	layerUri := fmt.Sprintf("/v2/quinistry/blobs/%s", image.LayerDigest)
+	configUri := fmt.Sprintf("/v2/quinistry/blobs/%s", image.ConfigDigest)
+
+	log.Fatal(http.ListenAndServe(":8080", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Acknowledge that we speak V2
+		if r.RequestURI == "/v2/" {
+			logRequest("Acknowleding V2 API", r)
+			fmt.Fprintln(w)
+			return
+		}
+
+		// Serve manifest
+		if r.RequestURI == "/v2/quinistry/manifests/latest" {
+			logRequest("Serving manifest", r)
+			w.Header().Set(ContentType, ManifestMediaType)
+			w.Header().Add(DigestHeader, image.ManifestDigest)
+			w.Write(image.Manifest)
+			return
+		}
+
+		// Serve actual image layer
+		if r.RequestURI == layerUri {
+			logRequest("Serving image layer blob", r)
+			w.Header().Add(DigestHeader, image.LayerDigest)
+			w.Write(image.Layer)
+			return
+		}
+
+		// Serve image config
+		if r.RequestURI == configUri {
+			logRequest("Serving config", r)
+			w.Header().Set("Content-Type", ImageConfigMediaType)
+			w.Header().Set(DigestHeader, image.ConfigDigest)
+			w.Write(image.Config)
+			return
+		}
+
+		log.Printf("Unhandled request: %v\n", *r)
+	})))
+}
+
+func logRequest(msg string, r *http.Request) {
+	log.Printf("%s: %s %s\n", msg, r.Method, r.RequestURI)
+}