1 files changed, 42 insertions, 0 deletions
diff --git a/src/commands/env_of.rs b/src/commands/env_of.rs
new file mode 100644
index 0000000..4ce5161
--- /dev/null
+++ b/src/commands/env_of.rs
@@ -0,0 +1,42 @@
+use anyhow::Error;
+use anyhow::Context;
+use anyhow::Result;
+use clap_v3::ArgMatches;
+
+use crate::package::PackageName;
+use crate::package::PackageVersionConstraint;
+use crate::repository::Repository;
+
+pub async fn env_of(matches: &ArgMatches, repo: Repository) -> Result<()> {
+    use filters::filter::Filter;
+    use std::io::Write;
+
+    let package_filter = {
+        let name       = matches.value_of("package_name").map(String::from).map(PackageName::from).unwrap();
+        let constraint = matches.value_of("package_version_constraint").map(String::from).map(PackageVersionConstraint::new).unwrap()?;
+        trace!("Checking for package with name = {} and version = {:?}", name, constraint);
+
+        crate::util::filters::build_package_filter_by_name(name)
+            .and(crate::util::filters::build_package_filter_by_version_constraint(constraint))
+    };
+
+    let mut stdout = std::io::stdout();
+    repo.packages()
+        .filter(|package| package_filter.filter(package))
+        .inspect(|pkg| trace!("Found package: {:?}", pkg))
+        .map(|pkg| {
+            if let Some(hm) = pkg.environment() {
+                for (key, value) in hm {
+                    writeln!(stdout, "{} = '{}'", key, value)?;
+                }
+            } else {
+                writeln!(stdout, "No environment")?;
+            }
+
+            Ok(())
+        })
+        .collect::<Result<_>>()
+}
+
+
+