cargo-rail: scaffold 'workspace' mode for combined split; added test repo code

Author: loadingalias

.gitignore

@@ -23,7 +23,8 @@ AGENTS.md
 *.key
 
 # Cargo-Rail (Testing)
-rail.toml
+*rail.toml
+
 # Notes
 STATUS.md
 E2E_TESTING_SETUP.md

crates/cargo-rail/src/commands/init.rs

@@ -3,7 +3,7 @@ use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 
 use crate::cargo::metadata::WorkspaceMetadata;
-use crate::core::config::{CratePath, RailConfig, SplitConfig, SplitMode};
+use crate::core::config::{CratePath, RailConfig, SplitConfig, SplitMode, WorkspaceMode};
 use crate::core::error::{RailError, RailResult, ResultExt};
 
 /// Run the init command to set up cargo-rail configuration
@@ -99,6 +99,7 @@ pub fn run_init(all: bool) -> RailResult<()> {
       remote: String::new(), // Empty - user will fill this in
       branch: "main".to_string(),
       mode: SplitMode::Single,
+      workspace_mode: WorkspaceMode::default(), // Standalone by default
       paths: vec![CratePath { path: package_path }],
       include: include_patterns,
       exclude: vec![],

crates/cargo-rail/src/core/config.rs

@@ -70,6 +70,9 @@ pub struct SplitConfig {
   pub remote: String,
   pub branch: String,
   pub mode: SplitMode,
+  /// For combined mode: how to structure the split repo
+  #[serde(default)]
+  pub workspace_mode: WorkspaceMode,
   #[serde(default)]
   pub paths: Vec<CratePath>,
   #[serde(default)]
@@ -84,13 +87,25 @@ pub struct CratePath {
   pub path: PathBuf,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
 #[serde(rename_all = "lowercase")]
 pub enum SplitMode {
+  #[default]
   Single,
   Combined,
 }
 
+/// How to structure a combined split repository
+#[derive(Debug, Clone, Serialize, Deserialize, Default)]
+#[serde(rename_all = "lowercase")]
+pub enum WorkspaceMode {
+  /// Multiple standalone crates in one repo (no workspace structure)
+  #[default]
+  Standalone,
+  /// Workspace structure with root Cargo.toml (mirrors monorepo)
+  Workspace,
+}
+
 impl RailConfig {
   /// Find config file in search order: rail.toml, .rail.toml, .cargo/rail.toml, .config/rail.toml
   pub fn find_config_path(path: &Path) -> Option<PathBuf> {

crates/test-crate-b/src/lib.rs

@@ -38,3 +38,4 @@ pub fn feature_b1() -> &'static str {
 pub fn fix_b1() -> bool {
   true
 }
+pub fn sync_feature() -> &'static str { "Synced from monorepo" }

rail.toml

@@ -48,6 +48,7 @@ name = "test-combined"
 remote = "[email protected]:loadingalias/cargo-rail-test-combined.git"
 branch = "main"
 mode = "combined"
+workspace_mode = "workspace" # "workspace" (mirror monorepo) or "standalone" (independent crates)
 include = [
     "src/**",
     "tests/**",