diff --git a/.github/workflows/goreleaser.yml b/.github/workflows/goreleaser.yml
new file mode 100644
index 0000000..9d1b148
--- /dev/null
+++ b/.github/workflows/goreleaser.yml
@@ -0,0 +1,20 @@
+name: goreleaser
+
+on:
+  - push
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@master
+      - name: Set up Go
+        uses: actions/setup-go@master
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v1
+        with:
+          version: latest
+          args: release --rm-dist
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9b1c8b1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/dist
diff --git a/.goreleaser.yml b/.goreleaser.yml
new file mode 100644
index 0000000..df71f76
--- /dev/null
+++ b/.goreleaser.yml
@@ -0,0 +1,20 @@
+builds:
+  - main: ./cmd/pbcopy
+    binary: pbcopy
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+    goarch:
+      - amd64
+checksum:
+  name_template: 'pbcopy-checksums.txt'
+archives:
+  - name_template: "pbcopy-{{ .Os }}-{{ .Arch }}"
+changelog:
+  sort: asc
+  filters:
+    exclude:
+      - '^docs:'
+      - '^test:'
diff --git a/cmd/pbcopy/main.go b/cmd/pbcopy/main.go
new file mode 100644
index 0000000..f98e4e6
--- /dev/null
+++ b/cmd/pbcopy/main.go
@@ -0,0 +1,108 @@
+package main
+
+import (
+	"bytes"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func normalEsc(b64 string) string {
+	return "\x1B]52;;" + b64 + "\x1B\x5C"
+}
+
+func tmuxEsc(b64 string) string {
+	return "\x1BPtmux;\x1B\x1B]52;;" + b64 + "\x1B\x1B\x5C\x5C\x1B\x5C"
+}
+
+func screenEsc(b64 string) string {
+	out := []string{}
+	for i := 0; ; i++ {
+		begin, end := i*76, (i+1)*76
+		if end > len(b64) {
+			end = len(b64)
+		}
+		if begin == 0 {
+			out = append(out, "\x1BP\x1B]52;;"+b64[begin:end])
+		} else {
+			out = append(out, "\x1B\x5C\x1BP"+b64[begin:end])
+		}
+		if end == len(b64) {
+			break
+		}
+	}
+	out = append(out, "\x07\x1B\x5C")
+	return strings.Join(out, "")
+}
+
+func isTmuxCC(pid string) bool {
+	out, err := exec.Command("ps", "-p", pid, "-o", "command=").Output()
+	if err != nil {
+		return false
+	}
+	out = bytes.TrimRight(out, "\n\r")
+	for _, argv := range strings.Split(string(out), " ") {
+		if argv == "-CC" {
+			return true
+		}
+	}
+	return false
+}
+
+func chooseEsc() func(string) string {
+	if env := os.Getenv("TMUX"); env != "" {
+		envs := strings.Split(env, ",")
+		if len(envs) > 1 {
+			pid := envs[1]
+			if isTmuxCC(pid) {
+				return normalEsc
+			}
+		}
+		return tmuxEsc
+	} else if env := os.Getenv("TERM"); strings.HasPrefix(env, "screen") {
+		return screenEsc
+	}
+	return normalEsc
+}
+
+func run() error {
+	var r io.Reader
+	switch len(os.Args) {
+	case 1:
+		r = os.Stdin
+	default:
+		if os.Args[1] == "-h" || os.Args[1] == "--help" {
+			fmt.Print("Usage:\n  pbcopy FILE\n  some-command | pbcopy\n")
+			os.Exit(1)
+		}
+		var err error
+		r, err = os.Open(os.Args[1])
+		if err != nil {
+			return err
+		}
+	}
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		return err
+	}
+	b = bytes.TrimRight(b, "\n\r")
+	if len(b) == 0 {
+		return nil
+	}
+
+	esc := chooseEsc()
+	b64 := base64.RawStdEncoding.EncodeToString(b)
+	fmt.Print(esc(b64))
+	return nil
+}
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}