generate all the man pages in the manpage xtask

xtask/src/manpage.rs

@@ -1,25 +1,36 @@
 use std::path::PathBuf;
 
 use clap::{CommandFactory as _, Parser};
+use git_identity::cli;
 
 /// Render the manpage of git-identity from its clap definition
 #[derive(Parser)]
 pub struct Cli {
-    /// The file in which to write the newly generated manpage
+    /// The directory in which to write the newly generated manpages
     ///
-    /// By default, this is "target/git-identity.1"
-    out_file: Option<PathBuf>,
+    /// By default, this is "./target"
+    out_dir: Option<PathBuf>,
 }
 
 pub fn main(cli: Cli) -> anyhow::Result<()> {
-    let man = clap_mangen::Man::new(git_identity::cli::Cli::command());
-    let mut buffer: Vec<u8> = Default::default();
+    let out_dir = cli.out_dir.unwrap_or_else(|| PathBuf::from("./target"));
+
+    let render = |name: &'static str, command: clap::Command| -> anyhow::Result<()> {
+        let man = clap_mangen::Man::new(command.name(name));
+
+        let mut buffer = Vec::<u8>::new();
         man.render(&mut buffer)?;
 
-    std::fs::write(
-        cli.out_file.unwrap_or_else(|| "./target/git-identity.1".into()),
-        buffer,
-    )?;
+        let mut out_path = out_dir.clone();
+        out_path.push(man.get_filename());
+
+        std::fs::write(out_path, buffer)?;
+
+        Ok(())
+    };
+
+    render("git-identity", cli::Cli::command())?;
+    render("git-identity-import", cli::ImportCli::command())?;
 
     Ok(())
 }