Add CLI interface for docker image name

Signed-off-by: Matthias Beyer <mail@beyermatthias.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/cli.rs b/src/cli.rs
index a3eff47..884d5b4 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -29,6 +29,14 @@ pub fn cli<'a>() -> App<'a> {
             .help("Pass these variables to each build job (expects \"key=value\" or name of variable available in ENV)")
         )
 
+        .arg(Arg::with_name("image")
+            .required(true)
+            .multiple(false)
+            .short('I')
+            .long("image")
+            .help("Name of the docker image to use")
+        )
+
 }
 
 /// Naive check whether 's' is a 'key=value' pair or an existing environment variable