read repo_name when opening repos

fuzz/atom/parser/gencorpus.rs

@@ -20,7 +20,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     fs::create_dir_all(&corpus_dir)?;
 
-    let repo = Repo::new("/var/db/repos/gentoo");
+    let repo = Repo::new("/var/db/repos/gentoo").expect("failed to open repo");
     let mut atoms = Vec::new();
 
     for category in repo.categories()? {

fuzz/atom/vercmp/gencorpus.rs

@@ -17,7 +17,7 @@ fn main() -> Result<(), Box<dyn Error>> {
 
     fs::create_dir_all(&corpus_dir)?;
 
-    let repo = Repo::new("/var/db/repos/gentoo");
+    let repo = Repo::new("/var/db/repos/gentoo").expect("failed to open repo");
     let mut versions = Vec::new();
 
     for category in repo.categories()? {

src/lib.rs

@@ -69,7 +69,8 @@ pub mod atom;
 /// ```
 /// use gentoo_utils::repo::Repo;
 ///
-/// let repo = Repo::new("/var/db/repos/gentoo");
+/// let repo = Repo::new("/var/db/repos/gentoo")
+///     .expect("failed to open repo");
 ///
 /// for result in repo.categories().expect("failed to read categories") {
 ///    let category = result.expect("failed to read category");

src/repo/mod.rs

@@ -23,6 +23,8 @@ pub mod profile;
 
 #[derive(Debug, thiserror::Error)]
 pub enum Error {
+    #[error("invalid repo: {0}")]
+    Invalid(String),
     #[error("io error: {0}")]
     Io(PathBuf, io::Error),
     #[error("error while reading directory: {0:?}: {1}")]
@@ -39,6 +41,8 @@ pub enum Error {
 pub struct Repo {
     #[get(kind = "deref")]
     path: PathBuf,
+    #[get(kind = "deref")]
+    name: String,
 }
 
 #[derive(Debug, Clone, Get)]
@@ -55,10 +59,20 @@ pub struct Categories(PathBuf, fs::ReadDir);
 pub struct Ebuilds(PathBuf, fs::ReadDir);
 
 impl Repo {
-    pub fn new<P: AsRef<Path>>(path: P) -> Self {
-        Self {
+    pub fn new<P: AsRef<Path>>(path: P) -> Result<Self, Error> {
+        let name_path = path.as_ref().join("profiles/repo_name");
+        let name = match fs::read_to_string(&name_path) {
+            Ok(repo_name) => repo_name,
+            Err(e) if matches!(e.kind(), io::ErrorKind::NotFound) => {
+                return Err(Error::Invalid("missing repo_name".to_string()));
+            }
+            Err(e) => return Err(Error::Io(name_path, e)),
+        };
+
+        Ok(Self {
             path: path.as_ref().to_path_buf(),
-        }
+            name,
+        })
     }
 
     pub fn categories(&self) -> Result<Categories, Error> {

src/repo/profile/mod.rs

@@ -2,7 +2,8 @@
 //! ```rust
 //! use gentoo_utils::repo::Repo;
 //!
-//! let repo = Repo::new("/var/db/repos/gentoo");
+//! let repo = Repo::new("/var/db/repos/gentoo")
+//!     .expect("failed to open repo");
 //! let profile = repo.evaluate_profile("default/linux/23.0")
 //!     .expect("failed to evaluate profile");
 //!

tests/profile/read_all_profiles.rs

@@ -474,7 +474,7 @@ fn main() {
         "prefix/sunos/solaris/5.11/x64",
     ];
 
-    let repo = Repo::new("/var/db/repos/gentoo");
+    let repo = Repo::new("/var/db/repos/gentoo").expect("failed to open repo");
 
     for profile in profiles {
         repo.evaluate_profile(profile)

tests/repo/repo.rs

@@ -3,7 +3,7 @@ use std::error::Error;
 use gentoo_utils::repo::Repo;
 
 fn main() -> Result<(), Box<dyn Error>> {
-    let repo = Repo::new("/var/db/repos/gentoo");
+    let repo = Repo::new("/var/db/repos/gentoo").unwrap();
 
     for result in repo.categories()? {
         let cat = result?;