1 files changed, 145 insertions, 0 deletions
diff --git a/vendor/gix-discover/src/repository.rs b/vendor/gix-discover/src/repository.rs
new file mode 100644
index 000000000..0c0318cdc
--- /dev/null
+++ b/vendor/gix-discover/src/repository.rs
@@ -0,0 +1,145 @@
+use std::path::PathBuf;
+
+/// A repository path which either points to a work tree or the `.git` repository itself.
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub enum Path {
+    /// The currently checked out linked worktree along with its connected and existing git directory, or the worktree checkout of a
+    /// submodule.
+    LinkedWorkTree {
+        /// The base of the work tree.
+        work_dir: PathBuf,
+        /// The worktree-private git dir, located within the main git directory which holds most of the information.
+        git_dir: PathBuf,
+    },
+    /// The currently checked out or nascent work tree of a git repository
+    WorkTree(PathBuf),
+    /// The git repository itself, typically bare and without known worktree.
+    ///
+    /// Note that it might still have linked work-trees which can be accessed later, weather bare or not, or it might be a
+    /// submodule git directory in the `.git/modules/**/<name>` directory of the parent repository.
+    Repository(PathBuf),
+}
+
+mod path {
+    use std::path::PathBuf;
+
+    use crate::{
+        path::without_dot_git_dir,
+        repository::{Kind, Path},
+        DOT_GIT_DIR,
+    };
+
+    impl AsRef<std::path::Path> for Path {
+        fn as_ref(&self) -> &std::path::Path {
+            match self {
+                Path::WorkTree(path)
+                | Path::Repository(path)
+                | Path::LinkedWorkTree {
+                    work_dir: _,
+                    git_dir: path,
+                } => path,
+            }
+        }
+    }
+
+    impl Path {
+        /// Instantiate a new path from `dir` which is expected to be the `.git` directory, with `kind` indicating
+        /// whether it's a bare repository or not, with `current_dir` being used to normalize relative paths
+        /// as needed.
+        ///
+        /// `None` is returned if `dir` could not be resolved due to being relative and trying to reach outside of the filesystem root.
+        pub fn from_dot_git_dir(
+            dir: impl Into<PathBuf>,
+            kind: Kind,
+            current_dir: impl AsRef<std::path::Path>,
+        ) -> Option<Self> {
+            let cwd = current_dir.as_ref();
+            let normalize_on_trailing_dot_dot = |dir: PathBuf| -> Option<PathBuf> {
+                if !matches!(dir.components().rev().next(), Some(std::path::Component::ParentDir)) {
+                    dir
+                } else {
+                    gix_path::normalize(&dir, cwd)?.into_owned()
+                }
+                .into()
+            };
+
+            let dir = dir.into();
+            match kind {
+                Kind::Submodule { git_dir } => Path::LinkedWorkTree {
+                    git_dir: gix_path::normalize(git_dir, cwd)?.into_owned(),
+                    work_dir: without_dot_git_dir(normalize_on_trailing_dot_dot(dir)?),
+                },
+                Kind::SubmoduleGitDir => Path::Repository(dir),
+                Kind::WorkTreeGitDir { work_dir } => Path::LinkedWorkTree { git_dir: dir, work_dir },
+                Kind::WorkTree { linked_git_dir } => match linked_git_dir {
+                    Some(git_dir) => Path::LinkedWorkTree {
+                        git_dir,
+                        work_dir: without_dot_git_dir(normalize_on_trailing_dot_dot(dir)?),
+                    },
+                    None => {
+                        let mut dir = normalize_on_trailing_dot_dot(dir)?;
+                        dir.pop(); // ".git" suffix
+                        let work_dir = dir.as_os_str().is_empty().then(|| PathBuf::from(".")).unwrap_or(dir);
+                        Path::WorkTree(work_dir)
+                    }
+                },
+                Kind::Bare => Path::Repository(dir),
+            }
+            .into()
+        }
+        /// Returns the [kind][Kind] of this repository path.
+        pub fn kind(&self) -> Kind {
+            match self {
+                Path::LinkedWorkTree { work_dir: _, git_dir } => Kind::WorkTree {
+                    linked_git_dir: Some(git_dir.to_owned()),
+                },
+                Path::WorkTree(_) => Kind::WorkTree { linked_git_dir: None },
+                Path::Repository(_) => Kind::Bare,
+            }
+        }
+
+        /// Consume and split this path into the location of the `.git` directory as well as an optional path to the work tree.
+        pub fn into_repository_and_work_tree_directories(self) -> (PathBuf, Option<PathBuf>) {
+            match self {
+                Path::LinkedWorkTree { work_dir, git_dir } => (git_dir, Some(work_dir)),
+                Path::WorkTree(working_tree) => (working_tree.join(DOT_GIT_DIR), Some(working_tree)),
+                Path::Repository(repository) => (repository, None),
+            }
+        }
+    }
+}
+
+/// The kind of repository path.
+#[derive(Debug, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub enum Kind {
+    /// A bare repository does not have a work tree, that is files on disk beyond the `git` repository itself.
+    ///
+    /// Note that this is merely a guess at this point as we didn't read the configuration yet.
+    Bare,
+    /// A `git` repository along with checked out files in a work tree.
+    WorkTree {
+        /// If set, this is the git dir associated with this _linked_ worktree.
+        /// If `None`, the git_dir is the `.git` directory inside the _main_ worktree we represent.
+        linked_git_dir: Option<PathBuf>,
+    },
+    /// A worktree's git directory in the common`.git` directory in `worktrees/<name>`.
+    WorkTreeGitDir {
+        /// Path to the worktree directory.
+        work_dir: PathBuf,
+    },
+    /// The directory is a `.git` dir file of a submodule worktree.
+    Submodule {
+        /// The git repository itself that is referenced by the `.git` dir file, typically in the `.git/modules/**/<name>` directory of the parent
+        /// repository.
+        git_dir: PathBuf,
+    },
+    /// The git directory in the `.git/modules/**/<name>` directory tree of the parent repository
+    SubmoduleGitDir,
+}
+
+impl Kind {
+    /// Returns true if this is a bare repository, one without a work tree.
+    pub fn is_bare(&self) -> bool {
+        matches!(self, Kind::Bare)
+    }
+}