1 files changed, 100 insertions, 0 deletions
diff --git a/app_build/webpull/main.go b/app_build/webpull/main.go
new file mode 100644
index 0000000..46c90b9
--- /dev/null
+++ b/app_build/webpull/main.go
@@ -0,0 +1,100 @@
+package main
+
+import (
+	"fmt"
+	"errors"
+	"io"
+	"os/exec"
+	"os"
+	"log"
+	"net/http"
+	"strings"
+)
+
+func myexec(w io.Writer, main string, params ...string) error {
+	cmd := exec.Command(main, params...)
+	cmd.Stdout = w
+	cmd.Stderr = w
+	err := cmd.Run()
+	if err != nil {
+		fmt.Fprintf(w, "Failed to run: %s %s\n", main, strings.Join(params, " "))
+	}
+	return err
+}
+
+func update(w io.Writer) error {
+	fmt.Fprintf(w, "Start update...\n")
+	_, err := os.Stat("./.git")
+	if err != nil {
+		fmt.Fprintf(w, ".git folder does not exist, creating it...\n")
+		err := myexec(w, "git", "init")
+		if err != nil {
+			return err
+		}
+	}
+
+	err = myexec(w, "git", "remote", "get-url", "origin")
+	if err != nil {
+		repo, exists := os.LookupEnv("WEBPULL_REPO")
+		if !exists {
+			fmt.Fprintf(w, "You must define WEBPULL_REPO env variable...\n")
+			return errors.New("Missing environment variable WEBPULL_REPO")
+		}
+		fmt.Fprintf(w, "git remote is not yet set...\n")
+		err := myexec(w, "git", "remote", "add", "origin", repo)
+		if err != nil {
+			return err
+		}
+	}
+
+	err = myexec(w, "git", "pull", "origin", "master")
+	if err != nil {
+		fmt.Fprintf(w, "Failed to pull...\n")
+		return err
+	}
+
+	_, err = os.Stat("./.webpull")
+	if err != nil {
+		fmt.Fprintf(w, "You must create an executable file named '.webpull' at the root of your repository.\nIf you have nothing to run, just create an empty bash script...\n")
+		return err
+	}
+
+	err = myexec(w, "./.webpull")
+	if err != nil {
+		fmt.Fprintf(w, "An error occured during script execution\n")
+		return err
+	}
+
+	fmt.Fprintf(w, "Success.\n")
+	return nil
+}
+
+func main() {
+	token, exists := os.LookupEnv("WEBPULL_TOKEN")
+	if !exists {
+		log.Fatal("Environment variable 'WEBPULL_TOKEN' must be defined")
+	}
+
+	if update(os.Stdout) != nil {
+		log.Fatal("Initial 'update' failed")
+	}
+
+	fs := http.FileServer(http.Dir("./static"))
+	http.HandleFunc("/update", func(w http.ResponseWriter, r *http.Request) {
+		keys, ok := r.URL.Query()["token"]
+		if !ok || len(keys[0]) < 1 {
+			http.Error(w, "Missing 'token' query parameter", 401)
+			return
+		}
+
+		if keys[0] != token {
+			http.Error(w, "Wrong token", 401)
+			return
+		}
+
+		update(w)
+	})
+	http.Handle("/", fs)
+
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}