Decouple core Yaak logic from Tauri (#354)

crates/yaak-git/src/error.rs

@@ -0,0 +1,64 @@
+use serde::{Serialize, Serializer};
+use std::io;
+use std::path::PathBuf;
+use std::string::FromUtf8Error;
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("Git repo not found {0}")]
+    GitRepoNotFound(PathBuf),
+
+    #[error("Git error: {0}")]
+    GitUnknown(#[from] git2::Error),
+
+    #[error("Yaml error: {0}")]
+    YamlParseError(#[from] serde_yaml::Error),
+
+    #[error(transparent)]
+    ModelError(#[from] yaak_models::error::Error),
+
+    #[error("Sync error: {0}")]
+    SyncError(#[from] yaak_sync::error::Error),
+
+    #[error("I/o error: {0}")]
+    IoError(#[from] io::Error),
+
+    #[error("JSON error: {0}")]
+    JsonParseError(#[from] serde_json::Error),
+
+    #[error("UTF8 error: {0}")]
+    Utf8ConversionError(#[from] FromUtf8Error),
+
+    #[error("Git error: {0}")]
+    GenericError(String),
+
+    #[error("'git' not found. Please ensure it's installed and available in $PATH")]
+    GitNotFound,
+
+    #[error("Credentials required: {0}")]
+    CredentialsRequiredError(String),
+
+    #[error("No default remote found")]
+    NoDefaultRemoteFound,
+
+    #[error("No remotes found for repo")]
+    NoRemotesFound,
+
+    #[error("Merge failed due to conflicts")]
+    MergeConflicts,
+
+    #[error("No active branch")]
+    NoActiveBranch,
+}
+
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}
+
+pub type Result<T> = std::result::Result<T, Error>;