chore: remove dependency on terrors

Cargo.toml

@@ -66,9 +66,6 @@ derive_more = { version = "1.0.0-beta.6", features = [
   "from",
 ] }
 
-# error handling
-terrors = "0.3"
-
 # file watcher
 inotify = "0.10"
 

crates/config/Cargo.toml

@@ -46,7 +46,6 @@ secrecy = { workspace = true }
 #
 # # error handling
 derive_more = { workspace = true }
-# terrors = { workspace = true }
 #
 # # file watcher
 # inotify = { workspace = true }

crates/git/Cargo.toml

@@ -48,7 +48,6 @@ secrecy = { workspace = true }
 
 # error handling
 derive_more = { workspace = true }
-# terrors = { workspace = true }
 
 # # file watcher
 # inotify = { workspace = true }

crates/server/Cargo.toml

@@ -47,9 +47,8 @@ bytes = { workspace = true }
 ulid = { workspace = true }
 warp = { workspace = true }
 
-# error handling
+# boilerplate
 derive_more = { workspace = true }
-terrors = { workspace = true }
 
 # file watcher
 inotify = { workspace = true }

crates/server/src/config/load.rs

@@ -1,25 +1,23 @@
 use git_next_config::{BranchName, RepoConfig};
 use git_next_git::RepoDetails;
-use terrors::OneOf;
 use tracing::error;
 
 use crate::gitforge::{self, ForgeFileError};
 
-pub async fn load(
-    details: &RepoDetails,
-    forge: &gitforge::Forge,
-) -> Result<RepoConfig, OneOf<(ForgeFileError, crate::config::Error, toml::de::Error, Error)>> {
+pub async fn load(details: &RepoDetails, forge: &gitforge::Forge) -> Result<RepoConfig, Error> {
     let contents = forge
         .file_contents_get(&details.branch, ".git-next.toml")
-        .await
-        .map_err(OneOf::new)?;
-    let config = RepoConfig::load(&contents).map_err(OneOf::new)?;
-    let config = validate(config, forge).await.map_err(OneOf::new)?;
+        .await?;
+    let config = RepoConfig::load(&contents)?;
+    let config = validate(config, forge).await?;
     Ok(config)
 }
 
-#[derive(Debug)]
+#[derive(Debug, derive_more::From, derive_more::Display)]
 pub enum Error {
+    File(ForgeFileError),
+    Config(crate::config::Error),
+    Toml(toml::de::Error),
     Forge(gitforge::ForgeBranchError),
     BranchNotFound(BranchName),
 }