From 9197930e642cdcead416a4cf9ffa64650614ae6c Mon Sep 17 00:00:00 2001
From: Matthias Beyer <matthias.beyer@ifm.com>
Date: Mon, 20 Jun 2022 13:17:37 +0200
Subject: Add command to export configuration as JSON

Signed-off-by: Matthias Beyer <matthias.beyer@ifm.com>
---
 Cargo.lock        | 1 +
 tedge/Cargo.toml  | 1 +
 tedge/src/cli.rs  | 3 +++
 tedge/src/main.rs | 9 +++++++++
 4 files changed, 14 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 1f24035b..54444664 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3385,6 +3385,7 @@ dependencies = [
  "plugin_notification",
  "plugin_sysstat",
  "pretty",
+ "serde_json",
  "tedge_api",
  "tedge_core",
  "tedge_lib",
diff --git a/tedge/Cargo.toml b/tedge/Cargo.toml
index 533526af..464f1d2d 100644
--- a/tedge/Cargo.toml
+++ b/tedge/Cargo.toml
@@ -23,6 +23,7 @@ termimad = "0.20.1"
 term_size = "0.3.2"
 owo-colors = "3.4.0"
 textwrap = "0.15.0"
+serde_json = "1"
 
 tedge_api = { path = "../crates/core/tedge_api" }
 tedge_core = { path = "../crates/core/tedge_core" }
diff --git a/tedge/src/cli.rs b/tedge/src/cli.rs
index 821b1cd9..79f47231 100644
--- a/tedge/src/cli.rs
+++ b/tedge/src/cli.rs
@@ -63,4 +63,7 @@ pub(crate) enum CliCommand {
         /// Print the doc only for this plugin
         plugin_name: Option<String>,
     },
+
+    #[clap(name = "export-config")]
+    ExportConfig { config: PathBuf },
 }
diff --git a/tedge/src/main.rs b/tedge/src/main.rs
index 6800c45a..73ce9fbc 100644
--- a/tedge/src/main.rs
+++ b/tedge/src/main.rs
@@ -210,6 +210,15 @@ async fn main() -> miette::Result<()> {
 
             Ok(())
         }
+
+        cli::CliCommand::ExportConfig { config } => {
+            let (_cancel_sender, application) =
+                registry.app_builder.with_config_from_path(config).await?;
+
+            let out = std::io::stdout();
+            serde_json::to_writer(out.lock(), application.config()).into_diagnostic()?;
+            Ok(())
+        }
     }
 }
 
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