Reorganise CLI crate

crates/cli/src/commands/config.rs

@@ -0,0 +1,78 @@
+// Copyright 2021, 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use clap::Parser;
+use mas_config::{ConfigurationSection, RootConfig};
+use schemars::gen::SchemaSettings;
+use tracing::info;
+
+#[derive(Parser, Debug)]
+pub(super) struct Options {
+    #[clap(subcommand)]
+    subcommand: Subcommand,
+}
+
+#[derive(Parser, Debug)]
+enum Subcommand {
+    /// Dump the current config as YAML
+    Dump,
+
+    /// Print the JSON Schema that validates configuration files
+    Schema,
+
+    /// Check a config file
+    Check,
+
+    /// Generate a new config file
+    Generate,
+}
+
+impl Options {
+    pub async fn run(&self, root: &super::Options) -> anyhow::Result<()> {
+        use Subcommand as SC;
+        match &self.subcommand {
+            SC::Dump => {
+                let config: RootConfig = root.load_config()?;
+
+                serde_yaml::to_writer(std::io::stdout(), &config)?;
+
+                Ok(())
+            }
+            SC::Schema => {
+                let settings = SchemaSettings::draft07().with(|s| {
+                    s.option_nullable = false;
+                    s.option_add_null_type = false;
+                });
+                let gen = settings.into_generator();
+                let schema = gen.into_root_schema_for::<RootConfig>();
+
+                serde_yaml::to_writer(std::io::stdout(), &schema)?;
+
+                Ok(())
+            }
+            SC::Check => {
+                let _config: RootConfig = root.load_config()?;
+                info!(path = ?root.config, "Configuration file looks good");
+                Ok(())
+            }
+            SC::Generate => {
+                let config = RootConfig::load_and_generate().await?;
+
+                serde_yaml::to_writer(std::io::stdout(), &config)?;
+
+                Ok(())
+            }
+        }
+    }
+}