build: add drone build

.drone.yml

@@ -0,0 +1,23 @@
+kind: pipeline
+name: default
+
+steps:
+- name: build
+  image: golang:1.17.2
+  commands:
+    - git tag $DRONE_TAG
+    - bash make.sh
+    - echo -n "latest,${DRONE_TAG#v}" > .tags
+
+- name: gitea_release
+  image: plugins/gitea-release
+  settings:
+    api_key:
+      from_secret: gitea_api_key
+    base_url: https://kumoly.io
+    files: dist/*
+    checksum:
+      - sha256
+
+trigger:
+  event: tag

.gitignore

@@ -0,0 +1 @@
+dist

README.md

@@ -11,3 +11,22 @@ enc := Encrypt(msg, key)
 dec, _ := Decrypt(enc, key)
 fmt.Printf("%s -> %s -> %s\n", msg, enc, dec)
 ```
+
+## Helper cli
+
+```shell
+usage: xorenc [e|d] msg key
+
+$ xorenc e test secret
+BwAQBg==
+
+$ xorenc d BwAQBg== secret
+test
+```
+
+### Install
+
+```sh
+sudo rm -f /usr/local/bin/xorenc
+sudo sh -c "curl -fsSL RELEASE_URL | tar -C /usr/local/bin/ -xz"
+```

cmd/xorenc/main.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"strings"
+
+	"kumoly.io/lib/xorencrypt"
+)
+
+var Version = "0.0.0"
+var Build = "alpha"
+
+var verFlag bool
+
+func init() {
+	flag.BoolVar(&verFlag, "v", false, "shoe version")
+}
+
+func main() {
+	flag.Parse()
+	if verFlag {
+		fmt.Printf("%s - %s\n", Version, Build)
+		return
+	}
+	if len(os.Args) < 3 {
+		fmt.Println("usage: xorencrypt [e|d] msg key")
+		os.Exit(1)
+	}
+	key := ""
+	if len(os.Args) > 3 {
+		key = os.Args[3]
+	}
+	msg := os.Args[2]
+
+	if strings.HasPrefix(os.Args[1], "e") {
+		fmt.Println(xorencrypt.Encrypt(msg, key))
+	} else {
+		str, err := xorencrypt.Decrypt(msg, key)
+		if err != nil {
+			panic(err)
+		}
+		fmt.Println(str)
+	}
+}

make.sh

@@ -0,0 +1,33 @@
+
+VERSION=$(git describe --tags --abbrev=0)
+if [ $? -ne 0 ]; then VERSION=$DRONE_TAG; fi
+BUILD=$(git rev-parse --short HEAD)
+if [ $? -ne 0 ]; then BUILD=${DRONE_COMMIT:0:7}; fi
+
+PROJ=xorenc
+DIST=dist
+
+LDFLAGS="-ldflags \"-X main.Version=${VERSION} -X main.Build=${BUILD} -w -s\""
+FAILURES=""
+
+PLATFORMS="darwin/amd64 darwin/arm64"
+PLATFORMS="$PLATFORMS windows/amd64"
+PLATFORMS="$PLATFORMS linux/amd64"
+
+
+for PLATFORM in $PLATFORMS; do
+  GOOS=${PLATFORM%/*}
+  GOARCH=${PLATFORM#*/}
+  BIN_FILENAME="${PROJ}"
+  if [[ "${GOOS}" == "windows" ]]; then BIN_FILENAME="${BIN_FILENAME}.exe"; fi
+  CMD="GOOS=${GOOS} GOARCH=${GOARCH} go build ${LDFLAGS} -o ${DIST}/${BIN_FILENAME} cmd/xorenc/main.go"
+  echo "${CMD}"
+  eval $CMD || FAILURES="${FAILURES} ${PLATFORM}"
+  sh -c "cd ${DIST} && tar -czf ${PROJ}-${VERSION}-${GOOS}-${GOARCH}.tar.gz ${BIN_FILENAME} && rm ${BIN_FILENAME}"
+done
+
+if [[ "${FAILURES}" != "" ]]; then
+  echo ""
+  echo "${SCRIPT_NAME} failed on: ${FAILURES}"
+  exit 1
+fi