1 files changed, 31 insertions, 0 deletions
diff --git a/src/cmd/list_backup_versions.rs b/src/cmd/list_backup_versions.rs
new file mode 100644
index 0000000..859d91c
--- /dev/null
+++ b/src/cmd/list_backup_versions.rs
@@ -0,0 +1,31 @@
+//! The `backup` subcommand.
+
+use crate::config::ClientConfig;
+use crate::dbgen::{schema_version, DEFAULT_SCHEMA_MAJOR, SCHEMA_MAJORS};
+use crate::error::ObnamError;
+
+use structopt::StructOpt;
+
+/// List supported backup schema versions.
+#[derive(Debug, StructOpt)]
+pub struct ListSchemaVersions {
+    /// List only the default version.
+    #[structopt(long)]
+    default_only: bool,
+}
+
+impl ListSchemaVersions {
+    /// Run the command.
+    pub fn run(&self, _config: &ClientConfig) -> Result<(), ObnamError> {
+        if self.default_only {
+            let schema = schema_version(DEFAULT_SCHEMA_MAJOR)?;
+            println!("{}", schema);
+        } else {
+            for major in SCHEMA_MAJORS {
+                let schema = schema_version(*major)?;
+                println!("{}", schema);
+            }
+        }
+        Ok(())
+    }
+}