From 04b4262cdf4bbb4e2698d8ce51a261bf294a2da3 Mon Sep 17 00:00:00 2001
From: Robin Krahl <robin.krahl@ireas.org>
Date: Sat, 5 Sep 2020 13:18:41 +0200
Subject: Add --output-format argument

This patch adds the --output-format argument that makes it possible to
select a format for the data that nitrocli prints to stdout.  Currently,
the only supported format is text output, i. e. a human-readable
representation.

TODO: man page, changelog
---
 src/args.rs | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

(limited to 'src/args.rs')

diff --git a/src/args.rs b/src/args.rs
index f54025e..758af8c 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -16,6 +16,9 @@ pub struct Args {
   /// Disables the cache for all secrets.
   #[structopt(long, global = true)]
   pub no_cache: bool,
+  /// Selects the output format.
+  #[structopt(long, global = true, possible_values = &OutputFormat::all_str())]
+  pub output_format: Option<OutputFormat>,
   #[structopt(subcommand)]
   pub cmd: Command,
 }
@@ -68,6 +71,26 @@ impl<'de> serde::Deserialize<'de> for DeviceModel {
   }
 }
 
+Enum! {
+  /// The format for the nitrocli output.
+  OutputFormat, [
+    Text => "text",
+  ]
+}
+
+impl<'de> serde::Deserialize<'de> for OutputFormat {
+  fn deserialize<D>(deserializer: D) -> Result<OutputFormat, D::Error>
+  where
+    D: serde::Deserializer<'de>,
+  {
+    use serde::de::Error as _;
+    use std::str::FromStr as _;
+
+    let s = String::deserialize(deserializer)?;
+    OutputFormat::from_str(&s).map_err(D::Error::custom)
+  }
+}
+
 Command! {
   /// A top-level command for nitrocli.
   Command, [
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