//! Build directory structure used through rebel
//!
//! # Current structure
//!
//! ```text
//! build/
//! ├── build.lock
//! ├── downloads/
//! │   └── ...
//! ├── state/
//! │   ├── output/
//! │   │   ├── <input hash>.tar.tmp  # during packing
//! │   │   ├── <archive hash>.tar    # files are renamed when packing is finished
//! │   │   └── ...
//! │   ├── layer/
//! │   │   ├── <layer hash>/         # overlayfs layer dir of finished tasks
//! │   │   └── ...
//! │   └── task/
//! │       ├── <input hash>/
//! │       │   ├── layer/            # overlayfs layer dir (moved to layer/ after build)
//! │       │   ├── work/             # overlayfs work dir (discarded after build)
//! │       │   ├── task.json.tmp     # during write
//! │       │   ├── task.json         # after write
//! │       │   ├── task.log          # stdout/stderr output of the task
//! │       │   └── task.lock         # task lockfile
//! │       └── ...
//! └── tmp/                          # temporary files (cleaned on start)
//!     ├── dev/                      # container /dev
//!     ├── depends/                  # unpacked dependencies
//!     └── task/
//!         └── <input hash>/
//!             ├── build/            # mount point for /build directory
//!             │   ├── downloads/    # downloaded sources
//!             │   ├── task/         # internal runner files
//!             │   └── work/         # build overlay mountpoint
//!             └── rootfs/           # rootfs overlay mountpoint
//! ```

use common::string_hash::*;

pub const DOWNLOADS_DIR: &str = "build/downloads";
pub const PIN_DIR: &str = "build/pinned";

pub const TMP_DIR: &str = "build/tmp";
pub const DEV_DIR: &str = "build/tmp/dev";
pub const DEPENDS_TMP_DIR: &str = "build/tmp/depends";
pub const TASK_TMP_DIR: &str = "build/tmp/task";

pub const TASK_TMP_ROOTFS_SUBDIR: &str = "rootfs";

pub const LOCKFILE: &str = "build/build.lock";
pub const OUTPUT_STATE_DIR: &str = "build/state/output";
pub const TASK_STATE_DIR: &str = "build/state/task";
pub const LAYER_STATE_DIR: &str = "build/state/layer";

pub const TASK_STATE_LAYER_SUBDIR: &str = "layer";
pub const TASK_STATE_WORK_SUBDIR: &str = "work";

pub const TASK_BUILDDIR: &str = "build";
pub const TASK_TASKDIR: &str = "build/task";

pub const TASK_RUN: &str = "run";

pub fn join(paths: &[&str]) -> String {
	paths.join("/")
}

pub fn task_tmp_dir(hash: &InputHash) -> String {
	join(&[TASK_TMP_DIR, &hash.to_string()])
}

pub fn task_state_dir(hash: &InputHash) -> String {
	join(&[TASK_STATE_DIR, &hash.to_string()])
}

pub fn task_cache_tmp_filename(hash: &InputHash) -> String {
	join(&[TASK_STATE_DIR, &hash.to_string(), "task.json.tmp"])
}

pub fn task_cache_filename(hash: &InputHash) -> String {
	join(&[TASK_STATE_DIR, &hash.to_string(), "task.json"])
}

pub fn task_log_filename(hash: &InputHash) -> String {
	join(&[TASK_STATE_DIR, &hash.to_string(), "task.log"])
}

pub fn task_lock_filename(hash: &InputHash) -> String {
	join(&[TASK_STATE_DIR, &hash.to_string(), "task.lock"])
}

pub fn layer_dir(hash: &LayerHash) -> String {
	join(&[LAYER_STATE_DIR, &hash.to_string()])
}

pub fn depend_tmp_dir(hash: &ArchiveHash) -> String {
	join(&[DEPENDS_TMP_DIR, &hash.to_string()])
}

pub fn depend_dir(hash: &ArchiveHash) -> String {
	join(&[DEPENDS_TMP_DIR, &hash.to_string()])
}

pub fn depend_lock_filename(hash: &ArchiveHash) -> String {
	join(&[DEPENDS_TMP_DIR, &format!("{}.lock", hash.to_string())])
}

pub fn archive_tmp_filename(hash: &InputHash) -> String {
	join(&[OUTPUT_STATE_DIR, &format!("{}.tar.tmp", hash)])
}

pub fn archive_filename(hash: &ArchiveHash) -> String {
	join(&[OUTPUT_STATE_DIR, &format!("{}.tar", hash)])
}

pub fn pinned_archive_filename(name: &str) -> String {
	join(&[PIN_DIR, &format!("{}.tar", name)])
}