willbe 0.35.0

#![ allow( clippy ::std_instead_of_alloc, clippy ::std_instead_of_core ) ]


use crate :: *;

use entity ::
{
  PathError,
  CrateDir,
};
use core ::
{
  fmt,
  ops ::
  {
  Deref,
  DerefMut,
 },
};
use std ::
{
  path :: { Path, PathBuf },
  io,
};

use pth :: { AbsolutePath };
use camino :: { Utf8Path, Utf8PathBuf };

// use error ::
// {
//   Result,
// };

/// Path to crate directory
#[ derive( Clone, Ord, PartialOrd, Eq, PartialEq, Hash ) ]
pub struct ManifestFile( AbsolutePath );

impl ManifestFile
{
  // aaa: bad: for Petro: why clone?
  // /// Returns an absolute path.
  // pub fn absolute_path( &self ) -> AbsolutePath
  // {
  //   self.0.clone()
  // }

  /// Returns inner type whicj is an absolute path.
  #[ inline( always ) ]
  #[ must_use ]
  pub fn inner( self ) -> AbsolutePath
  {
  self.0
 }

  /// Returns path to crate dir.
  #[ inline( always ) ]
  #[ must_use ]
  pub fn crate_dir( self ) -> CrateDir
  {
  self.into()
 }

}

impl fmt ::Display for ManifestFile
{
  fn fmt( &self, f: &mut fmt ::Formatter< '_ > ) -> fmt ::Result
  {
  write!( f, "{}", self.0.display() )
 }
}

impl fmt ::Debug for ManifestFile
{
  fn fmt( &self, f: &mut fmt ::Formatter< '_ > ) -> fmt ::Result
  {
  write!( f, "manifest file :: {}", self.0.display() )
 }
}

// impl AsRef< AbsolutePath > for ManifestFile
// {
//   fn as_ref( &self ) -> &AbsolutePath
//   {
//     &self.0
// }
// }

impl From< CrateDir > for ManifestFile
{
  fn from( src: CrateDir ) -> Self
  {
  Self( src.absolute_path().join( "Cargo.toml" ).expect( "Failed to join Cargo.toml path" ) )
 }
}

impl From< ManifestFile > for AbsolutePath
{
  fn from( src: ManifestFile ) -> Self
  {
  src.inner()
 }
}

impl From< ManifestFile > for PathBuf
{
  fn from( src: ManifestFile ) -> Self
  {
  src.inner().inner()
 }
}

// impl From< &ManifestFile > for &str
// {
//   fn from( src: &ManifestFile ) -> Self
//   {
//     src.to_str()
// }
// }

impl< 'a > TryFrom< &'a ManifestFile > for &'a str
{
  type Error = std ::io ::Error;
  fn try_from( src: &'a ManifestFile ) -> Result< &'a str, Self ::Error >
  {
  ( &src.0 ).try_into()
 }
}

impl TryFrom< &ManifestFile > for String
{
  type Error = std ::io ::Error;
  fn try_from( src: &ManifestFile ) -> Result< String, Self ::Error >
  {
  let src2: &str = src.try_into()?;
  Result ::Ok( src2.into() )
 }
}

impl TryFrom< &AbsolutePath > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: &AbsolutePath ) -> Result< Self, Self ::Error >
  {
  manifest_file.clone().try_into()
 }
}

impl TryFrom< AbsolutePath > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: AbsolutePath ) -> Result< Self, Self ::Error >
  {

  if !manifest_file.as_ref().ends_with( "Cargo.toml" )
  {
   let err = io ::Error ::other( format!( "File path does not end with Cargo.toml as it should {}", manifest_file.display() ) );
   return Err( PathError ::Io( err ) );
 }

  if !manifest_file.as_ref().is_file()
  {
   let err = io ::Error ::new( io ::ErrorKind ::InvalidData, format!( "Cannot find crate dir at {}", manifest_file.display() ) );
   return Err( PathError ::Io( err ) );
 }
  Result ::Ok( Self( manifest_file ) )
 }
}

impl TryFrom< PathBuf > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: PathBuf ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl TryFrom< &PathBuf > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: &PathBuf ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl TryFrom< &Path > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: &Path ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl TryFrom< &str > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( crate_dir_path: &str ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( crate_dir_path )? )
 }
}

impl TryFrom< Utf8PathBuf > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: Utf8PathBuf ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl TryFrom< &Utf8PathBuf > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: &Utf8PathBuf ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl TryFrom< &Utf8Path > for ManifestFile
{
  type Error = PathError;

  #[ inline( always ) ]
  fn try_from( manifest_file: &Utf8Path ) -> Result< Self, Self ::Error >
  {
  Self ::try_from( AbsolutePath ::try_from( manifest_file )? )
 }
}

impl AsRef< Path > for ManifestFile
{
  fn as_ref( &self ) -> &Path
  {
  self.0.as_ref()
 }
}

impl AsMut< Path > for ManifestFile
{
  fn as_mut( &mut self ) -> &mut Path
  {
  self.0.as_mut()
 }
}

impl Deref for ManifestFile
{
  type Target = AbsolutePath;
  fn deref( &self ) -> &Self ::Target
  {
  &self.0
 }
}

impl DerefMut for ManifestFile
{
  fn deref_mut( &mut self ) -> &mut Self ::Target
  {
  &mut self.0
 }
}