feat: gix clone <url> is now permitted without specifying a destination directory. (#683)

Note that the implementation doesn't take into account potential redirects and renames
as it's implemented only with the first URL it sees (not the redirected ones).

Author: Byron

Diff for: gitoxide-core/src/repository/clone.rs

@@ -12,16 +12,16 @@ pub const PROGRESS_RANGE: std::ops::RangeInclusive<u8> = 1..=3;
 pub(crate) mod function {
     use std::ffi::OsStr;
 
-    use anyhow::bail;
+    use anyhow::{bail, Context};
     use git_repository as git;
     use git_repository::{bstr::BString, remote::fetch::Status, Progress};
 
     use super::Options;
     use crate::{repository::fetch::function::print_updates, OutputFormat};
 
     pub fn clone<P>(
-        remote: impl AsRef<OsStr>,
-        directory: impl AsRef<std::path::Path>,
+        url: impl AsRef<OsStr>,
+        directory: Option<impl Into<std::path::PathBuf>>,
         overrides: Vec<BString>,
         mut progress: P,
         mut out: impl std::io::Write,
@@ -41,8 +41,16 @@ pub(crate) mod function {
             bail!("JSON output isn't yet supported for fetching.");
         }
 
+        let url: git::Url = url.as_ref().try_into()?;
+        let directory = directory.map(|dir| Ok(dir.into())).unwrap_or_else(|| {
+            git::path::from_bstr(url.path.as_ref())
+                .as_ref()
+                .file_stem()
+                .map(Into::into)
+                .context("Filename extraction failed - path too short")
+        })?;
         let mut prepare = git::clone::PrepareFetch::new(
-            remote.as_ref(),
+            url,
             directory,
             bare.then(|| git::create::Kind::Bare)
                 .unwrap_or(git::create::Kind::WithWorktree),

Diff for: src/plumbing/options/mod.rs

@@ -182,7 +182,7 @@ pub mod clone {
         pub remote: OsString,
 
         /// The directory to initialize with the new repository and to which all data should be written.
-        pub directory: PathBuf,
+        pub directory: Option<PathBuf>,
     }
 }