Add background package

This rewrite has better comments and returns better error messages.

1 files changed, 25 insertions, 0 deletions

diff --git a/background/set_darwin.go b/background/set_darwin.go
new file mode 100644
index 0000000..43e86b7
--- /dev/null
+++ b/background/set_darwin.go
@@ -0,0 +1,25 @@
+// +build darwin
+
+package background
+
+import (
+	"fmt"
+	"os/exec"
+	"strconv"
+)
+
+// SetFromFile takes a string as an input, it must be absolute path to
+// the background. Checks are not made to check if the path exists or
+// it is actually an image, that must be verified before passing it to
+// SetFromFile. SetFromFile will exit returning in error if there is
+// any.
+func SetFromFile(path string) error {
+	err := exec.Command("osascript", "-e",
+		`tell application "System Events" to tell every desktop to set picture to `+strconv.Quote(path)).Run()
+	if err != nil {
+		err = fmt.Errorf("%s\n%s",
+			"set_darwin.go: failed to set background",
+			err.Error())
+	}
+	return err
+}