Change layout directory from data to config

* default layouts won't be installed by anymore,
  instead they will be directly loaded

* `layout-dir` is now a subdirectory of the
  `config-dir` by default, instead of the `data-dir`

  POSSIBLE BREAKING CHANGE:
  In case of having custom layouts in the previous
  `layout-dir` one can switch either the layouts to
  the new dir, or set the `layout-dir` to be the current
  `layout-dir`

* it is possible to change the location of the `layout-dir`:
  - `zellij options --layout-dir [LAYOUR_DIR]`
  - `layout_dir: [LAYOUT_DIR]`

src/install.rs

@@ -17,15 +17,10 @@ macro_rules! asset_map {
 pub(crate) fn populate_data_dir(data_dir: &Path) {
     // First run installation of default plugins & layouts
     let mut assets = asset_map! {
-        "assets/layouts/default.yaml" => "layouts/default.yaml",
-        "assets/layouts/strider.yaml" => "layouts/strider.yaml",
-        "assets/layouts/disable-status-bar.yaml" => "layouts/disable-status-bar.yaml",
-    };
-    assets.extend(asset_map! {
         "assets/plugins/status-bar.wasm" => "plugins/status-bar.wasm",
         "assets/plugins/tab-bar.wasm" => "plugins/tab-bar.wasm",
         "assets/plugins/strider.wasm" => "plugins/strider.wasm",
-    });
+    };
     assets.insert("VERSION", VERSION.as_bytes().to_vec());
 
     let last_version = fs::read_to_string(data_dir.join("VERSION")).unwrap_or_default();

src/main.rs

@@ -16,7 +16,7 @@ use zellij_utils::{
     input::layout::Layout,
     input::options::Options,
     logging::*,
-    setup::{get_default_data_dir, Setup},
+    setup::{find_default_config_dir, get_default_data_dir, get_layout_dir, Setup},
     structopt::StructOpt,
 };
 
@@ -36,6 +36,8 @@ pub fn main() {
             process::exit(1);
         }
     };
+    let config_options = Options::from_cli(&config.options, opts.command.clone());
+
     atomic_create_dir(&*ZELLIJ_TMP_DIR).unwrap();
     atomic_create_dir(&*ZELLIJ_TMP_LOG_DIR).unwrap();
     if let Some(path) = opts.server {
@@ -66,8 +68,6 @@ pub fn main() {
                 session_name = Some(get_active_session());
             }
 
-            let config_options = Options::from_cli(&config.options, opts.command.clone());
-
             start_client(
                 Box::new(os_input),
                 opts,
@@ -81,16 +81,19 @@ pub fn main() {
                 .clone()
                 .unwrap_or_else(|| names::Generator::default().next().unwrap());
             assert_session_ne(&session_name);
+
             // Determine and initialize the data directory
             let data_dir = opts.data_dir.clone().unwrap_or_else(get_default_data_dir);
-
             #[cfg(not(disable_automatic_asset_installation))]
             populate_data_dir(&data_dir);
 
+            let layout_dir = config_options.layout_dir.or_else(|| {
+                get_layout_dir(opts.config_dir.clone().or_else(find_default_config_dir))
+            });
             let layout = Layout::from_path_or_default(
                 opts.layout.as_ref(),
                 opts.layout_path.as_ref(),
-                &data_dir,
+                layout_dir,
             );
 
             start_client(

src/tests/integration/layouts.rs

@@ -32,7 +32,7 @@ pub fn accepts_basic_layout() {
     let layout = zellij_utils::input::layout::Layout::from_path_or_default(
         None,
         opts.layout_path.as_ref(),
-        std::path::Path::new("unused"),
+        Some(std::path::Path::new("unused").into()),
     );
 
     start(

zellij-utils/src/consts.rs

@@ -10,6 +10,7 @@ use std::{env, fs};
 
 pub const ZELLIJ_CONFIG_FILE_ENV: &str = "ZELLIJ_CONFIG_FILE";
 pub const ZELLIJ_CONFIG_DIR_ENV: &str = "ZELLIJ_CONFIG_DIR";
+pub const ZELLIJ_LAYOUT_DIR_ENV: &str = "ZELLIJ_LAYOUT_DIR";
 pub const VERSION: &str = env!("CARGO_PKG_VERSION");
 
 pub const SYSTEM_DEFAULT_CONFIG_DIR: &str = "/etc/zellij";

zellij-utils/src/input/layout.rs

@@ -8,7 +8,7 @@
 //  place.
 //  If plugins should be able to depend on the layout system
 //  then [`zellij-utils`] could be a proper place.
-use crate::{input::config::ConfigError, pane_size::PositionAndSize};
+use crate::{input::config::ConfigError, pane_size::PositionAndSize, setup};
 use crate::{serde, serde_yaml};
 
 use serde::{Deserialize, Serialize};
@@ -55,22 +55,26 @@ impl Layout {
 
     // It wants to use Path here, but that doesn't compile.
     #[allow(clippy::ptr_arg)]
-    pub fn from_dir(layout: &PathBuf, data_dir: &Path) -> LayoutResult {
-        Self::new(&data_dir.join("layouts/").join(layout))
+    pub fn from_dir(layout: &PathBuf, layout_dir: Option<&PathBuf>) -> LayoutResult {
+        match layout_dir {
+            Some(dir) => Self::new(&dir.join(layout))
+                .or_else(|_| Self::from_default_assets(layout.as_path())),
+            None => Self::from_default_assets(layout.as_path()),
+        }
     }
 
     pub fn from_path_or_default(
         layout: Option<&PathBuf>,
         layout_path: Option<&PathBuf>,
-        data_dir: &Path,
+        layout_dir: Option<PathBuf>,
     ) -> Option<Layout> {
         let layout_result = layout
-            .map(|p| Layout::from_dir(&p, &data_dir))
+            .map(|p| Layout::from_dir(&p, layout_dir.as_ref()))
             .or_else(|| layout_path.map(|p| Layout::new(&p)))
             .or_else(|| {
                 Some(Layout::from_dir(
                     &std::path::PathBuf::from("default"),
-                    &data_dir,
+                    layout_dir.as_ref(),
                 ))
             });
 
@@ -84,6 +88,41 @@ impl Layout {
         }
     }
 
+    // Currently still needed but on nightly
+    // this is already possible:
+    // HashMap<&'static str, Vec<u8>>
+    pub fn from_default_assets(path: &Path) -> LayoutResult {
+        match path.to_str() {
+            Some("default") => Self::default_from_assets(),
+            Some("strider") => Self::strider_from_assets(),
+            Some("disable-status-bar") => Self::disable_status_from_assets(),
+            None | Some(_) => Err(ConfigError::IoPath(
+                std::io::Error::new(std::io::ErrorKind::Other, "The layout was not found"),
+                path.into(),
+            )),
+        }
+    }
+
+    // TODO Deserialize the assets from bytes &[u8],
+    // once serde-yaml supports zero-copy
+    pub fn default_from_assets() -> LayoutResult {
+        let layout: Layout =
+            serde_yaml::from_str(String::from_utf8(setup::DEFAULT_LAYOUT.to_vec())?.as_str())?;
+        Ok(layout)
+    }
+
+    pub fn strider_from_assets() -> LayoutResult {
+        let layout: Layout =
+            serde_yaml::from_str(String::from_utf8(setup::STRIDER_LAYOUT.to_vec())?.as_str())?;
+        Ok(layout)
+    }
+
+    pub fn disable_status_from_assets() -> LayoutResult {
+        let layout: Layout =
+            serde_yaml::from_str(String::from_utf8(setup::NO_STATUS_LAYOUT.to_vec())?.as_str())?;
+        Ok(layout)
+    }
+
     pub fn total_terminal_panes(&self) -> usize {
         let mut total_panes = 0;
         total_panes += self.parts.len();

zellij-utils/src/input/options.rs

@@ -1,6 +1,7 @@
 //! Handles cli and configuration options
 use crate::cli::Command;
 use serde::{Deserialize, Serialize};
+use std::path::PathBuf;
 use structopt::StructOpt;
 use zellij_tile::data::InputMode;
 
@@ -19,6 +20,10 @@ pub struct Options {
     /// Set the default mode
     #[structopt(long)]
     pub default_mode: Option<InputMode>,
+    /// Set the layout_dir, defaults to
+    /// subdirectory of config dir
+    #[structopt(long, parse(from_os_str))]
+    pub layout_dir: Option<PathBuf>,
 }
 
 impl Options {
@@ -45,6 +50,11 @@ impl Options {
             other => other,
         };
 
+        let layout_dir = match other.layout_dir {
+            None => self.layout_dir.clone(),
+            other => other,
+        };
+
         let theme = match other.theme {
             None => self.theme.clone(),
             other => other,
@@ -54,6 +64,7 @@ impl Options {
             simplified_ui,
             theme,
             default_mode,
+            layout_dir,
         }
     }
 

zellij-utils/src/setup.rs

@@ -66,6 +66,10 @@ pub fn home_config_dir() -> Option<PathBuf> {
     }
 }
 
+pub fn get_layout_dir(config_dir: Option<PathBuf>) -> Option<PathBuf> {
+    config_dir.map(|dir| dir.join("layouts"))
+}
+
 pub fn dump_asset(asset: &[u8]) -> std::io::Result<()> {
     std::io::stdout().write_all(&asset)?;
     Ok(())
@@ -77,6 +81,24 @@ pub const DEFAULT_CONFIG: &[u8] = include_bytes!(concat!(
     "assets/config/default.yaml"
 ));
 
+pub const DEFAULT_LAYOUT: &[u8] = include_bytes!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/",
+    "assets/layouts/default.yaml"
+));
+
+pub const STRIDER_LAYOUT: &[u8] = include_bytes!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/",
+    "assets/layouts/strider.yaml"
+));
+
+pub const NO_STATUS_LAYOUT: &[u8] = include_bytes!(concat!(
+    env!("CARGO_MANIFEST_DIR"),
+    "/",
+    "assets/layouts/default.yaml"
+));
+
 pub fn dump_default_config() -> std::io::Result<()> {
     dump_asset(DEFAULT_CONFIG)
 }