feat(build): add cargo deps and build.rs for mangen poc

Signed-off-by: Sandro-Alessio Gierens <sandro@gierens.de>

Cargo.toml

@@ -57,3 +57,7 @@ lazy_static = "1.4"
 serial_test = "2.0"
 # cli
 trycmd = "0.14"
+
+[build-dependencies]
+clap_mangen = { version = "0.2.13" }
+clap = { version = "4.4", features = ["derive", "env"] }

build.rs

@@ -0,0 +1,22 @@
+#[allow(dead_code)]
+fn mangen() -> std::io::Result<()> {
+    let out_dir = std::path::PathBuf::from(std::env::var_os("OUT_DIR").ok_or(std::io::ErrorKind::NotFound)?);
+
+    let cmd = clap::Command::new("wikijs")
+        .arg(clap::arg!(-u --url <URL>));
+        // .arg(clap::arg!(-c --count <NUM>));
+
+    let man = clap_mangen::Man::new(cmd);
+    let mut buffer: Vec<u8> = Default::default();
+    man.render(&mut buffer)?;
+
+    std::fs::write(out_dir.join("wikijs.1"), buffer)?;
+
+    Ok(())
+}
+
+fn main() -> std::io::Result<()> {
+    #[cfg(feature = "cli")]
+    mangen()?;
+    Ok(())
+}