Make the `password_cmd` config setting work

Given a string from `password_cmd`, we should execute it as a shell
command and assume the result is a password. That password then gets
submitted to TimeTask's login form for authentication.

Had to do a bit of wrangling to get the command to execute by
`exec.Command()`, but managed to get it working in a bit of a roundabout
way.

Found these resources in my searches:
- https://stackoverflow.com/questions/39930109/golang-execute-command#39930127
https://stackoverflow.com/questions/28783637/how-to-make-golang-execute-a-string
- https://stackoverflow.com/questions/20437336/how-to-execute-system-command-in-golang-with-unknown-arguments
- https://github.com/codeskyblue/go-sh

1 files changed, 4 insertions, 1 deletions

diff --git a/main.go b/main.go
index ae18a87..ab0fc4a 100644
--- a/main.go
+++ b/main.go
@@ -87,9 +87,12 @@ func main() {
 		*description,
 	)
 
+	password, err := passwordCmd(config.Auth.PasswordCmd)
+	kingpin.FatalIfError(err, "password command failed")
+
 	resp, client, err := timetask.Login(
 		config.Auth.Username,
-		config.Auth.PasswordCmd,
+		password,
 	)
 	kingpin.FatalIfError(err, "Login request failed")
 	log.Printf("%+v\n", resp)