Initial Commit with starter kit

LICENSE

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+MIT License
+
+Copyright (c) 2020 ICFP Programming Contest
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

app/go.mod

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+module app
+
+go 1.14

app/main.go

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+package main
+
+import (
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"strings"
+)
+
+func main() {
+	serverURL := os.Args[1]
+	playerKey := os.Args[2]
+
+	log.Printf("ServerUrl: %s; PlayerKey: %s", serverURL, playerKey)
+
+	res, err := http.Post(serverURL, "text/plain", strings.NewReader(playerKey))
+	if err != nil {
+		log.Printf("Unexpected server response:\n%v", err)
+		os.Exit(1)
+	}
+	defer res.Body.Close()
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		log.Printf("Unexpected server response:\n%v", err)
+		os.Exit(1)
+	}
+
+	if res.StatusCode != http.StatusOK {
+		log.Printf("Unexpected server response:")
+		log.Printf("HTTP code: %d", res.StatusCode)
+		log.Printf("Response body: %s", body)
+		os.Exit(2)
+	}
+
+	log.Printf("Server response: %s", body)
+}

build.sh

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+#!/bin/sh
+
+cd app
+go build -o app .

run.sh

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+#!/bin/sh
+
+app/app "$@" || echo "run error code: $?"