feat: validate repo if it already exists

Closes kemitix/git-next#60

Cargo.toml

@@ -63,7 +63,7 @@ tokio = { version = "1.37", features = ["full"] }
 # Testing
 assert2 = "0.3"
 pretty_assertions = "1.4"
-test-log = "0.2"
+test-log = { version = "0.2", features = ["env_logger", "trace"] }
 anyhow = "1.0"
 
 [package.metadata.bin]

src/server/config/mod.rs

@@ -181,7 +181,6 @@ pub struct ServerRepoConfig {
     dev: Option<String>,
 }
 impl ServerRepoConfig {
-    #[allow(dead_code)]
     pub fn repo(&self) -> RepoPath {
         RepoPath(self.repo.clone())
     }
@@ -369,6 +368,36 @@ impl RepoDetails {
         let origin = format!("https://{user}:{token}@{hostname}/{repo_path}.git");
         origin.into()
     }
+
+    #[allow(dead_code)]
+    pub fn validate_repo(&self) -> Result<(), RepoValidationError> {
+        self.gitdir.validate(self)
+    }
+
+    pub fn find_default_push_remote(&self) -> Result<GitRemote, RepoValidationError> {
+        let repository = gix::open(self.gitdir.clone())
+            .map_err(|e| RepoValidationError::UnableToOpenRepo(e.to_string()))?;
+        let Some(Ok(remote)) = repository.find_default_remote(gix::remote::Direction::Push) else {
+            return Err(RepoValidationError::NoDefaultPushRemote);
+        };
+        let Some(url) = remote.url(gix::remote::Direction::Push) else {
+            return Err(RepoValidationError::NoUrlForDefaultPushRemote);
+        };
+        let Some(host) = url.host() else {
+            return Err(RepoValidationError::NoHostnameForDefaultPushRemote);
+        };
+        let path = url.path.to_string();
+        let path = path.strip_prefix('/').map_or(path.as_str(), |path| path);
+        let path = path.strip_suffix(".git").map_or(path, |path| path);
+        Ok(GitRemote::new(
+            Hostname(host.to_string()),
+            RepoPath(path.to_string()),
+        ))
+    }
+
+    pub fn git_remote(&self) -> GitRemote {
+        GitRemote::new(self.forge.hostname.clone(), self.repo_path.clone())
+    }
 }
 impl Display for RepoDetails {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
@@ -386,6 +415,34 @@ impl Display for RepoDetails {
     }
 }
 
+#[derive(Debug)]
+pub enum RepoValidationError {
+    NoDefaultPushRemote,
+    NoUrlForDefaultPushRemote,
+    NoHostnameForDefaultPushRemote,
+    UnableToOpenRepo(String),
+    Io(std::io::Error),
+    MismatchDefaultPushRemote {
+        found: GitRemote,
+        configured: GitRemote,
+    },
+}
+impl Display for RepoValidationError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::NoDefaultPushRemote => write!(f, "There is no default push remote"),
+            Self::NoUrlForDefaultPushRemote => write!(f, "The default push remote has no url"),
+            Self::NoHostnameForDefaultPushRemote => {
+                write!(f, "The default push remote has no hostname")
+            }
+            Self::UnableToOpenRepo(err) => write!(f, "Unable to open the git dir: {err}"),
+            Self::Io(err) => write!(f, "IO Error: {err:?}"),
+            Self::MismatchDefaultPushRemote{found, configured} =>
+            write!(f, "The default push remote for the git dir doesn't match the configuration: found: {found}, expected: {configured}")
+        }
+    }
+}
+
 /// Identifier for the type of Forge
 #[derive(Clone, Debug, PartialEq, Eq, Deserialize)]
 pub enum ForgeType {
@@ -415,6 +472,15 @@ impl GitDir {
     pub const fn pathbuf(&self) -> &PathBuf {
         &self.0
     }
+
+    pub fn validate(&self, repo_details: &RepoDetails) -> Result<(), RepoValidationError> {
+        let configured = repo_details.git_remote();
+        let found = repo_details.find_default_push_remote()?;
+        if configured != found {
+            return Err(RepoValidationError::MismatchDefaultPushRemote { found, configured });
+        }
+        Ok(())
+    }
 }
 impl Deref for GitDir {
     type Target = PathBuf;
@@ -433,6 +499,33 @@ impl From<&str> for GitDir {
         Self(value.into())
     }
 }
+impl From<GitDir> for PathBuf {
+    fn from(value: GitDir) -> Self {
+        value.0
+    }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub struct GitRemote {
+    host: Hostname,
+    repo_path: RepoPath,
+}
+impl GitRemote {
+    pub const fn new(host: Hostname, repo_path: RepoPath) -> Self {
+        Self { host, repo_path }
+    }
+    pub const fn host(&self) -> &Hostname {
+        &self.host
+    }
+    pub const fn repo_path(&self) -> &RepoPath {
+        &self.repo_path
+    }
+}
+impl Display for GitRemote {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}:{}", self.host, self.repo_path)
+    }
+}
 
 #[cfg(test)]
 mod tests;

src/server/config/tests.rs

@@ -1,6 +1,10 @@
+use assert2::let_assert;
 use pretty_assertions::assert_eq;
 
-use crate::filesystem::FileSystem;
+use crate::{
+    filesystem::FileSystem,
+    server::gitforge::tests::common, /* server::gitforge::tests::common */
+};
 
 use super::*;
 
@@ -142,3 +146,82 @@ fn gitdir_should_display_as_pathbuf() {
     //then
     assert_eq!(result, "foo/dir");
 }
+
+#[test]
+// NOTE: this test assumes it is being run in a cloned worktree from the project's home repo:
+// git.kemitix.net:kemitix/git-next
+// If the default push remote is something else, then this test will fail
+fn repo_details_find_default_push_remote_finds_correct_remote() -> Result<(), RepoValidationError> {
+    let cwd = std::env::current_dir().map_err(RepoValidationError::Io)?;
+    let mut repo_details = common::repo_details(
+        1,
+        common::forge_details(1, ForgeType::MockForge),
+        None,
+        GitDir::new(&cwd), // Server GitDir - should be ignored
+    );
+    repo_details.forge.hostname = Hostname("git.kemitix.net".to_string());
+    repo_details.repo_path = RepoPath("kemitix/git-next".to_string());
+    let found_git_remote = repo_details.find_default_push_remote()?;
+    let config_git_remote = repo_details.git_remote();
+
+    assert_eq!(
+        found_git_remote, config_git_remote,
+        "Default Push Remote must match config"
+    );
+
+    Ok(())
+}
+
+#[test]
+fn gitdir_validate_should_pass_a_valid_git_repo() -> Result<(), RepoValidationError> {
+    let cwd = std::env::current_dir().map_err(RepoValidationError::Io)?;
+    let mut repo_details = common::repo_details(
+        1,
+        common::forge_details(1, ForgeType::MockForge),
+        None,
+        GitDir::new(&cwd), // Server GitDir - should be ignored
+    );
+    repo_details.forge.hostname = Hostname("git.kemitix.net".to_string());
+    repo_details.repo_path = RepoPath("kemitix/git-next".to_string());
+    let git_dir = &repo_details.gitdir;
+    git_dir.validate(&repo_details)?;
+
+    Ok(())
+}
+
+#[test]
+fn gitdir_validate_should_fail_a_non_git_dir() {
+    let_assert!(Ok(fs) = kxio::filesystem::FileSystem::new_temp());
+    let cwd = fs.cwd();
+    let repo_details = common::repo_details(
+        1,
+        common::forge_details(1, ForgeType::MockForge),
+        None,
+        GitDir::new(cwd), // Server GitDir - should be ignored
+    );
+    let git_dir = &repo_details.gitdir;
+    let_assert!(Err(_) = git_dir.validate(&repo_details));
+}
+
+#[test]
+fn gitdir_validate_should_fail_a_git_repo_with_wrong_remote() {
+    let_assert!(Ok(cwd) = std::env::current_dir().map_err(RepoValidationError::Io));
+    let mut repo_details = common::repo_details(
+        1,
+        common::forge_details(1, ForgeType::MockForge),
+        None,
+        GitDir::new(&cwd), // Server GitDir - should be ignored
+    );
+    repo_details.forge.hostname = Hostname("localhost".to_string());
+    repo_details.repo_path = RepoPath("hello/world".to_string());
+    let git_dir = &repo_details.gitdir;
+    let_assert!(Err(_) = git_dir.validate(&repo_details));
+}
+
+#[test]
+fn git_remote_to_string_is_as_expected() {
+    let git_remote = GitRemote::new(Hostname("foo".to_string()), RepoPath("bar".to_string()));
+    let as_string = git_remote.to_string();
+
+    assert_eq!(as_string, "foo:bar");
+}

src/server/gitforge/errors.rs

@@ -43,16 +43,20 @@ impl std::fmt::Display for ForgeBranchError {
 #[derive(Debug)]
 pub enum RepoCloneError {
     InvalidGitDir(GitDir),
+    Io(std::io::Error),
     Wait(std::io::Error),
     Spawn(std::io::Error),
+    Validation(String),
 }
 impl std::error::Error for RepoCloneError {}
 impl std::fmt::Display for RepoCloneError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
             Self::InvalidGitDir(gitdir) => write!(f, "Invalid Git dir: {:?}", gitdir),
+            Self::Io(err) => write!(f, "IO error: {:?}", err),
             Self::Wait(err) => write!(f, "Waiting for command: {:?}", err),
             Self::Spawn(err) => write!(f, "Spawning comming: {:?}", err),
+            Self::Validation(err) => write!(f, "Validation: {}", err),
         }
     }
 }

src/server/gitforge/forgejo/mod.rs

@@ -101,7 +101,13 @@ impl super::ForgeLike for ForgeJoEnv {
     }
 
     fn repo_clone(&self, gitdir: GitDir) -> Result<(), RepoCloneError> {
-        repo::clone(&self.repo_details, gitdir)
+        if gitdir.exists() {
+            gitdir
+                .validate(&self.repo_details)
+                .map_err(|e| RepoCloneError::Validation(e.to_string()))
+        } else {
+            repo::clone(&self.repo_details, gitdir)
+        }
     }
 }
 

src/server/gitforge/forgejo/repo/clone.rs

@@ -6,8 +6,6 @@ use crate::server::{
 };
 
 pub fn clone(repo_details: &RepoDetails, gitdir: GitDir) -> Result<(), RepoCloneError> {
-    // TODO: (#60) If directory already exists, validate it is git repo (e.g. is a git repo,
-    // matches the same origin)
     let origin = repo_details.origin();
     // INFO: never log the command as it contains the API token within the 'origin'
     use secrecy::ExposeSecret;

src/server/gitforge/mod.rs

@@ -94,4 +94,4 @@ impl std::ops::Deref for Forge {
 }
 
 #[cfg(test)]
-mod tests;
+pub mod tests;

src/server/gitforge/tests/mod.rs

@@ -1,6 +1,6 @@
 use super::*;
 
-mod common;
+pub mod common;
 
 #[cfg(feature = "forgejo")]
 mod forgejo;