Add -o parameter

CHANGES.md

@@ -1,2 +1,5 @@
-# 0.1.0 (2019-10-09)
+# v0.2.0 (2019-10-10)
+- Add `-o` parameter to output clipboard instead.
+
+# v0.1.0 (2019-10-09)
 - Initial release.

README.md

@@ -10,9 +10,27 @@ Copy stdin contents to clipboard:
 echo foo | cb
 ```
 
-Copy stdin contents to clipboard, truncating 1 trailing line break if it exists:
+Omit exactly one trailing line break if it exists:
 ```sh
 echo foo | cb -n
+# or
+echo -n foo | cb
+```
+
+Manually write the clipboard:
+```sh
+cb
+Hello World!^D # ^D = Ctrl+D (send EOF)
+```
+
+Write clipboard to stdout:
+```sh
+cb -o
+```
+
+Write clipboard to file:
+```sh
+cb -o file.txt
 ```
 
 ## Installation

main.go

@@ -10,17 +10,27 @@ import (
 )
 
 func main() {
-	flagTruncNewLine := flag.Bool("n", false, "Set to truncate one trailing line break if it exists.")
+	flagTruncNewLine := flag.Bool("n", false, "Set to omit exactly one trailing line break from the clipboard should it exist.")
+	outputClipboard := flag.Bool("o", false, "Set to output the clipboard instead of setting it.")
 	flag.Parse()
 
 	var cb string
 	var err error
+	var filePath string
 	if flag.NArg() == 0 {
-		data, ioErr := ioutil.ReadAll(os.Stdin)
-		cb, err = string(data), ioErr
+		if *outputClipboard {
+			cb, err = clipboard.ReadAll()
+		} else {
+			data, ioErr := ioutil.ReadAll(os.Stdin)
+			cb, err = string(data), ioErr
+		}
 	} else if flag.NArg() == 1 {
-		filePath := flag.Arg(0)
-		cb, err = readTextFile(filePath)
+		filePath = flag.Arg(0)
+		if *outputClipboard {
+			cb, err = clipboard.ReadAll()
+		} else {
+			cb, err = readTextFile(filePath)
+		}
 	} else {
 		fatalf("provide file path or input on stdin")
 	}
@@ -32,7 +42,16 @@ func main() {
 		cb = cb[:len(cb)-1]
 	}
 
-	err = clipboard.WriteAll(cb)
+	if *outputClipboard {
+		if filePath == "" {
+			_, err = fmt.Printf(cb)
+		} else {
+			err = ioutil.WriteFile(filePath, []byte(cb), 0755)
+		}
+	} else {
+		err = clipboard.WriteAll(cb)
+	}
+
 	if err != nil {
 		fatalf("%v", err)
 	}