various: resolve multi-platform lookup; improve error messages

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Iec6ee73639d0b42c96127db657575ab86a6a6964

src/cli/commands/add.rs

@@ -35,8 +35,10 @@ async fn resolve_input(
   platforms: &HashMap<String, Box<dyn crate::platform::PlatformClient>>,
   lockfile: &LockFile,
 ) -> Result<Project> {
-  for platform in platforms.values() {
-    if let Ok(project) = platform
+  let mut projects = Vec::new();
+
+  for (platform_name, client) in platforms {
+    match client
       .request_project_with_files(
         input,
         &lockfile.mc_versions,
@@ -44,11 +46,29 @@ async fn resolve_input(
       )
       .await
     {
-      return Ok(project);
+      Ok(project) => {
+        log::debug!("Resolved '{input}' on {platform_name}");
+        projects.push(project);
+      },
+      Err(e) => {
+        log::debug!("Could not resolve '{input}' on {platform_name}: {e}");
+      },
     }
   }
 
-  Err(PakkerError::ProjectNotFound(input.to_string()))
+  if projects.is_empty() {
+    return Err(PakkerError::ProjectNotFound(input.to_string()));
+  }
+
+  if projects.len() == 1 {
+    return Ok(projects.remove(0));
+  }
+
+  let mut merged = projects.remove(0);
+  for project in projects {
+    merged.merge(project);
+  }
+  Ok(merged)
 }
 
 use std::path::Path;
@@ -111,16 +131,24 @@ pub async fn execute(
       }
 
       // Load parent lockfile to get metadata
-      let parent_lockfile = parent_paths
+      let parent_lock_path = parent_paths
         .iter()
         .find(|path| path.exists())
-        .and_then(|path| LockFile::load(path.parent()?).ok())
         .ok_or_else(|| {
           PakkerError::IoError(std::io::Error::new(
             std::io::ErrorKind::NotFound,
-            "Failed to load parent lockfile metadata",
+            "Parent lockfile not found at expected paths",
           ))
         })?;
+      let parent_lockfile = LockFile::load_with_validation(
+        parent_lock_path.parent().ok_or_else(|| {
+          PakkerError::IoError(std::io::Error::new(
+            std::io::ErrorKind::NotFound,
+            "Parent lockfile path has no parent directory",
+          ))
+        })?,
+        false,
+      )?;
 
       let minimal_lockfile = LockFile {
         target:           parent_lockfile.target,

src/cli/commands/fork.rs

@@ -702,7 +702,11 @@ fn execute_promote(projects: &[String]) -> Result<(), PakkerError> {
     })?;
 
   // Load or create local lockfile
-  let lockfile_path = config_dir.join("pakku-lock.json");
+  let lockfile_path = if config_dir.join("pakker-lock.json").exists() {
+    config_dir.join("pakker-lock.json")
+  } else {
+    config_dir.join("pakku-lock.json")
+  };
   let mut local_lockfile = if lockfile_path.exists() {
     LockFile::load_with_validation(config_dir, false).map_err(|e| {
       PakkerError::Fork(format!("Failed to load local lockfile: {e}"))

src/ipc.rs

@@ -120,7 +120,7 @@ impl IpcCoordinator {
       pakku_path
     } else {
       return Err(IpcError::PakkuJsonReadFailed(
-        "pakku.json not found in working directory".to_string(),
+        "pakker.json or pakku.json not found in working directory".to_string(),
       ));
     };
 

src/platform/github.rs

@@ -533,10 +533,7 @@ mod tests {
 
     for (tag, asset, expected) in cases {
       let result = extract_mc_versions(tag, asset);
-      assert_eq!(
-        result, expected,
-        "Failed for tag: {tag}, asset: {asset}"
-      );
+      assert_eq!(result, expected, "Failed for tag: {tag}, asset: {asset}");
     }
   }
 
@@ -567,10 +564,7 @@ mod tests {
 
     for (tag, asset, expected) in cases {
       let result = extract_loaders(tag, asset);
-      assert_eq!(
-        result, expected,
-        "Failed for tag: {tag}, asset: {asset}"
-      );
+      assert_eq!(result, expected, "Failed for tag: {tag}, asset: {asset}");
     }
   }
 

src/platform/multiplatform.rs

@@ -78,21 +78,22 @@ impl PlatformClient for MultiplatformPlatform {
     let mut cf_project = cf_project;
     let mut mr_project = mr_project;
 
-    let mr_found_and_cf_missing = mr_project.is_some() && cf_project.is_none();
-    if mr_found_and_cf_missing
+    // Cross-reference using each platform's own slug on the other platform.
+    // Modrinth projects store their slug under "modrinth"; CurseForge under
+    // "curseforge". Many mods share the same slug across platforms.
+    if cf_project.is_none()
       && let Some(ref mr) = mr_project
-      && let Some(cf_slug) = mr.slug.get("curseforge")
+      && let Some(mr_slug) = mr.slug.get("modrinth")
       && let Ok(Some(cf)) =
-        self.curseforge.request_project_from_slug(cf_slug).await
+        self.curseforge.request_project_from_slug(mr_slug).await
     {
       cf_project = Some(cf);
     }
-    let cf_found_and_mr_missing = cf_project.is_some() && mr_project.is_none();
-    if cf_found_and_mr_missing
+    if mr_project.is_none()
       && let Some(ref cf) = cf_project
-      && let Some(mr_slug) = cf.slug.get("modrinth")
+      && let Some(cf_slug) = cf.slug.get("curseforge")
       && let Ok(Some(mr)) =
-        self.modrinth.request_project_from_slug(mr_slug).await
+        self.modrinth.request_project_from_slug(cf_slug).await
     {
       mr_project = Some(mr);
     }
@@ -232,3 +233,183 @@ impl PlatformClient for MultiplatformPlatform {
     Ok(all_projects)
   }
 }
+
+#[cfg(test)]
+mod tests {
+  use std::{collections::HashMap, sync::Arc};
+
+  use async_trait::async_trait;
+
+  use super::*;
+  use crate::{
+    error::{PakkerError, Result},
+    model::{Project, ProjectFile, ProjectSide, ProjectType},
+  };
+
+  struct MockPlatform {
+    projects: HashMap<String, Project>,
+    slug_map: HashMap<String, Project>,
+  }
+
+  impl MockPlatform {
+    fn new() -> Self {
+      Self {
+        projects: HashMap::new(),
+        slug_map: HashMap::new(),
+      }
+    }
+
+    fn with_project(mut self, id: &str, project: Project) -> Self {
+      self.projects.insert(id.to_string(), project);
+      self
+    }
+
+    fn with_slug(mut self, slug: &str, project: Project) -> Self {
+      self.slug_map.insert(slug.to_string(), project);
+      self
+    }
+  }
+
+  #[async_trait]
+  impl PlatformClient for MockPlatform {
+    async fn request_project(
+      &self,
+      project_id: &str,
+      _mc_versions: &[String],
+      _loaders: &[String],
+    ) -> Result<Project> {
+      self
+        .projects
+        .get(project_id)
+        .cloned()
+        .ok_or_else(|| PakkerError::ProjectNotFound(project_id.to_string()))
+    }
+
+    async fn request_project_files(
+      &self,
+      _project_id: &str,
+      _mc_versions: &[String],
+      _loaders: &[String],
+    ) -> Result<Vec<ProjectFile>> {
+      Ok(vec![])
+    }
+
+    async fn request_project_with_files(
+      &self,
+      project_id: &str,
+      mc_versions: &[String],
+      loaders: &[String],
+    ) -> Result<Project> {
+      self.request_project(project_id, mc_versions, loaders).await
+    }
+
+    async fn lookup_by_hash(&self, _hash: &str) -> Result<Option<Project>> {
+      Ok(None)
+    }
+
+    async fn request_project_from_slug(
+      &self,
+      slug: &str,
+    ) -> Result<Option<Project>> {
+      Ok(self.slug_map.get(slug).cloned())
+    }
+
+    async fn request_projects_from_hashes(
+      &self,
+      _hashes: &[String],
+      _algorithm: &str,
+    ) -> Result<Vec<Project>> {
+      Ok(vec![])
+    }
+  }
+
+  fn make_project(platform: &str, id: &str, slug: &str) -> Project {
+    let mut project =
+      Project::new(slug.to_string(), ProjectType::Mod, ProjectSide::Both);
+    project.id.insert(platform.to_string(), id.to_string());
+    project.slug.insert(platform.to_string(), slug.to_string());
+    project.name.insert(platform.to_string(), slug.to_string());
+    project
+  }
+
+  #[tokio::test]
+  async fn test_cross_reference_modrinth_to_curseforge() {
+    let mr_project = make_project("modrinth", "mr-abc", "sodium");
+    let cf_project = make_project("curseforge", "12345", "sodium");
+
+    let modrinth =
+      Arc::new(MockPlatform::new().with_project("sodium", mr_project.clone()));
+    let curseforge =
+      Arc::new(MockPlatform::new().with_slug("sodium", cf_project.clone()));
+
+    let platform = MultiplatformPlatform::new(curseforge, modrinth);
+    let result = platform.request_project("sodium", &[], &[]).await.unwrap();
+
+    assert_eq!(result.id.get("modrinth"), Some(&"mr-abc".to_string()));
+    assert_eq!(result.id.get("curseforge"), Some(&"12345".to_string()));
+  }
+
+  #[tokio::test]
+  async fn test_cross_reference_curseforge_to_modrinth() {
+    let cf_project = make_project("curseforge", "12345", "sodium");
+    let mr_project = make_project("modrinth", "mr-abc", "sodium");
+
+    let modrinth =
+      Arc::new(MockPlatform::new().with_slug("sodium", mr_project.clone()));
+    let curseforge =
+      Arc::new(MockPlatform::new().with_project("sodium", cf_project.clone()));
+
+    let platform = MultiplatformPlatform::new(curseforge, modrinth);
+    let result = platform.request_project("sodium", &[], &[]).await.unwrap();
+
+    assert_eq!(result.id.get("curseforge"), Some(&"12345".to_string()));
+    assert_eq!(result.id.get("modrinth"), Some(&"mr-abc".to_string()));
+  }
+
+  #[tokio::test]
+  async fn test_found_on_both_platforms_merged() {
+    let cf_project = make_project("curseforge", "12345", "sodium");
+    let mr_project = make_project("modrinth", "mr-abc", "sodium");
+
+    let modrinth =
+      Arc::new(MockPlatform::new().with_project("sodium", mr_project));
+    let curseforge =
+      Arc::new(MockPlatform::new().with_project("sodium", cf_project));
+
+    let platform = MultiplatformPlatform::new(curseforge, modrinth);
+    let result = platform.request_project("sodium", &[], &[]).await.unwrap();
+
+    assert_eq!(result.id.get("curseforge"), Some(&"12345".to_string()));
+    assert_eq!(result.id.get("modrinth"), Some(&"mr-abc".to_string()));
+  }
+
+  #[tokio::test]
+  async fn test_not_found_on_either_platform() {
+    let modrinth = Arc::new(MockPlatform::new());
+    let curseforge = Arc::new(MockPlatform::new());
+
+    let platform = MultiplatformPlatform::new(curseforge, modrinth);
+    let result = platform.request_project("nonexistent", &[], &[]).await;
+
+    assert!(matches!(result, Err(PakkerError::ProjectNotFound(_))));
+  }
+
+  #[tokio::test]
+  async fn test_no_cross_reference_when_slug_absent() {
+    // CurseForge returns a project, but slug lookup on Modrinth finds nothing
+    let cf_project = make_project("curseforge", "12345", "rare-mod");
+
+    let modrinth = Arc::new(MockPlatform::new());
+    let curseforge =
+      Arc::new(MockPlatform::new().with_project("rare-mod", cf_project));
+
+    let platform = MultiplatformPlatform::new(curseforge, modrinth);
+    let result = platform
+      .request_project("rare-mod", &[], &[])
+      .await
+      .unwrap();
+
+    assert_eq!(result.id.get("curseforge"), Some(&"12345".to_string()));
+    assert!(result.id.get("modrinth").is_none());
+  }
+}