update error message

tooling/nargo_toml/src/errors.rs

@@ -73,7 +73,7 @@ pub enum ManifestError {
 
 #[derive(Error, Debug, PartialEq, Eq, Clone)]
 pub enum SemverError {
-    #[error("Incompatible compiler version in package {package_name}. Required version is {required_compiler_version} but the compiler version is {compiler_version_found}")]
+    #[error("Incompatible compiler version in package {package_name}. Required compiler version is {required_compiler_version} but the compiler version is {compiler_version_found}.\n Update the compiler_version field in Nargo.toml to >={compiler_version_found} or compile this project with version {compiler_version_found}")]
     IncompatibleVersion {
         package_name: CrateName,
         required_compiler_version: String,

tooling/nargo_toml/src/semver.rs

@@ -39,7 +39,7 @@ pub(crate) fn semver_check_package(
             return Err(SemverError::IncompatibleVersion {
                 package_name: package.name.clone(),
                 required_compiler_version: version.clone(),
-                compiler_version_found: compiler_version.to_string(),
+                compiler_version_found: strip_build_meta_data(compiler_version),
             });
         };
     }
@@ -56,6 +56,13 @@ pub(crate) fn semver_check_package(
     Ok(())
 }
 
+// Strip the build meta data from the version string since it is ignored by semver.
+fn strip_build_meta_data(version: &Version) -> String {
+    let version_string = version.to_string();
+    let mut split = version_string.split('+');    
+    split.next().expect("split was called on an empty string").to_string()
+}
+
 #[cfg(test)]
 mod tests {
     use std::{collections::BTreeMap, path::PathBuf, str::FromStr};