From ae8c2addabbf701d9ea5ca1fcae9687cbdca1d02 Mon Sep 17 00:00:00 2001
From: Manos Pitsidianakis <el13635@mail.ntua.gr>
Date: Wed, 8 Sep 2021 22:09:32 +0300
Subject: [PATCH] Show compile time features in with command argument

Show compile time feature flags with compiled-with subcommand

Closes #115
---
 docs/meli.1 |  2 ++
 src/bin.rs  | 23 +++++++++++++++++++++++
 2 files changed, 25 insertions(+)

diff --git a/docs/meli.1 b/docs/meli.1
index 3ab53a679..ebae49231 100644
--- a/docs/meli.1
+++ b/docs/meli.1
@@ -48,6 +48,8 @@ Print documentation page and exit (Piping to a pager is recommended.)
 Print default theme keys and values in TOML syntax, to be used as a blueprint.
 .It Cm print-loaded-themes
 Print all loaded themes in TOML syntax.
+.It Cm compiled-with
+Print compile time feature flags of this binary.
 .It Cm view
 View mail from input file.
 .El
diff --git a/src/bin.rs b/src/bin.rs
index c7a26decd..750cf292d 100644
--- a/src/bin.rs
+++ b/src/bin.rs
@@ -180,6 +180,10 @@ enum SubCommand {
     /// print documentation page and exit (Piping to a pager is recommended.).
     Man(ManOpt),
 
+    #[structopt(display_order = 4)]
+    /// print compile time feature flags of this binary
+    CompiledWith,
+
     /// View mail from input file.
     View {
         #[structopt(value_name = "INPUT", parse(from_os_str))]
@@ -290,6 +294,25 @@ fn run_app(opt: Opt) -> Result<()> {
         Some(SubCommand::Man(_manopt)) => {
             return Err(MeliError::new("error: this version of meli was not build with embedded documentation. You might have it installed as manpages (eg `man meli`), otherwise check https://meli.delivery"));
         }
+        Some(SubCommand::CompiledWith) => {
+            #[cfg(feature = "notmuch")]
+            println!("notmuch");
+            #[cfg(feature = "jmap")]
+            println!("jmap");
+            #[cfg(feature = "sqlite3")]
+            println!("sqlite3");
+            #[cfg(feature = "smtp")]
+            println!("smtp");
+            #[cfg(feature = "regexp")]
+            println!("regexp");
+            #[cfg(feature = "dbus-notifications")]
+            println!("dbus-notifications");
+            #[cfg(feature = "cli-docs")]
+            println!("cli-docs");
+            #[cfg(feature = "gpgme")]
+            println!("gpgme");
+            return Ok(());
+        }
         Some(SubCommand::PrintLoadedThemes) => {
             let s = conf::FileSettings::new()?;
             print!("{}", s.terminal.themes.to_string());