Make error message more verbose

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

1 files changed, 4 insertions, 0 deletions

diff --git a/src/package/version.rs b/src/package/version.rs
index 9705c8d..359c80f 100644
--- a/src/package/version.rs
+++ b/src/package/version.rs
@@ -10,6 +10,7 @@
 
 use std::ops::Deref;
 
+use anyhow::Context;
 use anyhow::Error;
 use anyhow::Result;
 use pom::parser::Parser as PomParser;
@@ -63,7 +64,10 @@ impl std::convert::TryFrom<&str> for PackageVersionConstraint {
     fn try_from(s: &str) -> Result<Self> {
         PackageVersionConstraint::parser()
             .parse(s.as_bytes())
+            .context("Failed to parse package version constraint")
+            .context("A package version constraint must have a comparator and a version string, like so: =0.1.0")
             .map_err(Error::from)
+
     }
 }