Add help text about environment functions

Signed-off-by: Matthias Beyer <matthias.beyer@atos.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/cli.rs b/src/cli.rs
index 4c629f8..db99b53 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -26,6 +26,14 @@ pub fn cli<'a>() -> App<'a> {
         .version(crate_version!())
         .about("Generic Build Orchestration System for building linux packages with docker")
 
+        .after_help(r#"
+            The folowing environment variables can be passed to butido:
+
+                RUST_LOG - to enable logging, for exact usage see the rust cookbook
+                PAGER    - to change the pager
+                NOPAGER  - to disable automatic use of the PAGER
+        "#)
+
         .arg(Arg::new("hide_bars")
             .required(false)
             .multiple(false)