add config file

Cargo.lock

@@ -1973,6 +1973,7 @@ dependencies = [
  "thiserror",
  "tokio",
  "tokio-util",
+ "toml 0.8.10",
  "tracing",
  "tracing-appender",
  "tracing-subscriber",
@@ -4185,7 +4186,7 @@ dependencies = [
  "siphasher 1.0.0",
  "thiserror",
  "time",
- "toml 0.8.8",
+ "toml 0.8.10",
  "url",
  "walkdir",
 ]
@@ -5842,14 +5843,14 @@ dependencies = [
 
 [[package]]
 name = "toml"
-version = "0.8.8"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1a195ec8c9da26928f773888e0742ca3ca1040c6cd859c919c9f59c1954ab35"
+checksum = "9a9aad4a3066010876e8dcf5a8a06e70a558751117a145c6ce2b82c2e2054290"
 dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "toml_edit 0.21.0",
+ "toml_edit 0.22.6",
 ]
 
 [[package]]
@@ -5871,7 +5872,7 @@ dependencies = [
  "serde",
  "serde_spanned",
  "toml_datetime",
- "winnow",
+ "winnow 0.5.15",
 ]
 
 [[package]]
@@ -5879,12 +5880,23 @@ name = "toml_edit"
 version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d34d383cd00a163b4a5b85053df514d45bc330f6de7737edfe0a93311d1eaa03"
+dependencies = [
+ "indexmap 2.0.0",
+ "toml_datetime",
+ "winnow 0.5.15",
+]
+
+[[package]]
+name = "toml_edit"
+version = "0.22.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c1b5fd4128cc8d3e0cb74d4ed9a9cc7c7284becd4df68f5f940e1ad123606f6"
 dependencies = [
  "indexmap 2.0.0",
  "serde",
  "serde_spanned",
  "toml_datetime",
- "winnow",
+ "winnow 0.6.5",
 ]
 
 [[package]]
@@ -6796,6 +6808,15 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "winnow"
+version = "0.6.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dffa400e67ed5a4dd237983829e66475f0a4a26938c4b04c21baede6262215b8"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "winreg"
 version = "0.50.0"

gitbutler-app/Cargo.toml

@@ -66,6 +66,7 @@ log = "^0.4"
 thiserror.workspace = true
 tokio = { workspace = true, features = [ "full", "sync" ] }
 tokio-util = "0.7.10"
+toml = "0.8.10"
 tracing = "0.1.40"
 tracing-appender = "0.2.3"
 tracing-subscriber = "0.3.17"

gitbutler-app/src/config.rs

@@ -0,0 +1,83 @@
+use serde::{Deserialize, Serialize};
+use tauri::AppHandle;
+
+/// Configuration loaded from `$config_dir/gitbutler.toml`
+#[derive(Clone, Serialize, Deserialize, Default)]
+#[serde(rename_all = "kebab-case")]
+pub struct Config {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub theme: Option<Theme>,
+}
+
+/// Custom theme configuration for the app
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+pub struct Theme {
+    pub base: ThemeBase,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub core_ntrl_100: Option<String>,
+}
+
+/// The base theme on which styles are applied
+#[derive(Clone, Copy, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum ThemeBase {
+    /// Theme modifications are based on the light theme
+    Light,
+    /// Theme modifications are based on the dark theme
+    Dark,
+}
+
+/// Errors that may arise when reading/writing config files
+#[derive(Debug, thiserror::Error)]
+pub enum Error {
+    #[error("i/o error: {1}: {0}")]
+    Io(String, std::io::Error),
+    #[error("toml error: {0}")]
+    Toml(String),
+}
+
+impl Serialize for Error {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(self.to_string().as_ref())
+    }
+}
+
+/// Loads the configuration from `$config_dir/gitbutler.toml`
+#[tauri::command(async)]
+pub async fn load_config(handle: AppHandle) -> Result<Config, Error> {
+    let Some(config_dir) = handle.path_resolver().app_config_dir() else {
+        tracing::warn!("failed to get app config dir (none returned)");
+        return Ok(Config::default());
+    };
+
+    let config_path = config_dir.join("gitbutler.toml");
+
+    match tokio::fs::read_to_string(&config_path).await {
+        Ok(contents) => {
+            tracing::debug!("loaded config from: {}", config_path.display());
+            toml::from_str(&contents).map_err(|err| Error::Toml(err.to_string()))
+        }
+        Err(err) => {
+            if err.kind() == std::io::ErrorKind::NotFound {
+                tracing::warn!("config file not found: {}", config_path.display());
+                let config = Config::default();
+
+                // Write it back out, only warning if it fails, returning the default config
+                // in either case
+                if let Err(err) =
+                    tokio::fs::write(&config_path, toml::to_string(&config).unwrap()).await
+                {
+                    tracing::warn!("failed to write default config: {}", err);
+                }
+
+                Ok(config)
+            } else {
+                Err(Error::Io(config_path.display().to_string(), err))
+            }
+        }
+    }
+}

gitbutler-app/src/main.rs

@@ -5,6 +5,7 @@ pub(crate) mod analytics;
 pub(crate) mod app;
 pub(crate) mod assets;
 pub(crate) mod commands;
+pub(crate) mod config;
 pub(crate) mod database;
 pub(crate) mod dedup;
 pub(crate) mod deltas;
@@ -198,6 +199,7 @@ fn main() {
                     commands::git_set_global_config,
                     commands::git_get_global_config,
                     commands::project_flush_and_push,
+                    config::load_config,
                     zip::commands::get_logs_archive_path,
                     zip::commands::get_project_archive_path,
                     zip::commands::get_project_data_archive_path,