feat(show): expand license output with name, OSI flag, and URL

Mirror Composer's Command\ShowCommand::printLicenses(): emit one line
per license identifier, expanded to "<full name> (<id>) [(OSI
approved)] <url>" when the id is in the SPDX database, or just the id
otherwise. The URL is built by mozart-spdx-licenses' new
LicenseInfo::url() so the construction lives in the SPDX crate, like
Composer's SpdxLicenses::getLicenseByIdentifier().

1 files changed, 27 insertions, 0 deletions

diff --git a/crates/mozart-spdx-licenses/src/lib.rs b/crates/mozart-spdx-licenses/src/lib.rs
index a551988..0747703 100644
--- a/crates/mozart-spdx-licenses/src/lib.rs
+++ b/crates/mozart-spdx-licenses/src/lib.rs
@@ -12,6 +12,18 @@ pub struct LicenseInfo {
     pub deprecated: bool,
 }
 
+impl LicenseInfo {
+    /// Canonical SPDX URL for this license. Mirrors Composer's
+    /// `SpdxLicenses::getLicenseByIdentifier()` which constructs the URL from
+    /// the identifier rather than storing it in the data file.
+    pub fn url(&self) -> String {
+        format!(
+            "https://spdx.org/licenses/{}.html#licenseText",
+            self.identifier
+        )
+    }
+}
+
 /// Information about an SPDX license exception.
 #[derive(Debug, Clone)]
 pub struct ExceptionInfo {
@@ -451,6 +463,21 @@ mod tests {
     }
 
     #[test]
+    fn license_url_uses_canonical_id() {
+        let db = spdx();
+        let mit = db.get_license_by_identifier("MIT").unwrap();
+        assert_eq!(mit.url(), "https://spdx.org/licenses/MIT.html#licenseText");
+
+        // Lookup is case-insensitive, but the URL uses the canonical casing
+        // from the database, mirroring Composer's `getLicenseByIdentifier`.
+        let mit_lower = db.get_license_by_identifier("mit").unwrap();
+        assert_eq!(
+            mit_lower.url(),
+            "https://spdx.org/licenses/MIT.html#licenseText"
+        );
+    }
+
+    #[test]
     fn exception_lookup() {
         let db = spdx();
         let exc = db