Add copy_sha256.sh

Author: ShotaKashihara

misc/copy_sha256.sh

@@ -0,0 +1,15 @@
+if [ $# -eq 0 ]; then
+    echo "A tag argument is needed!(ex: ./copy_sha256 1.2.3)"
+    exit 1
+fi
+tag=$1
+echo "Tag: '${tag}'"
+filename="${tag}.tar.gz"
+echo "Filename: '${filename}'"
+curl -LOk "https://github.com/ShotaKashihara/atcoder-cli-swift/archive/${filename}"
+result=$(shasum -a 256 $filename)
+echo "Result: '${result}'"
+sha256=$(echo ${result} | cut -d ' ' -f 1)
+echo $sha256 | tr -d '\n' | pbcopy
+echo "sha256('${sha256}') was copied to your clipboard🎉"
+rm $filename