willbe 0.35.0

#[ allow( clippy ::std_instead_of_alloc, clippy ::std_instead_of_core ) ]
mod private
{

  use crate :: *;
  use std ::hash ::Hash;
  use crates_tools ::CrateArchive;
  use error ::
  {
  // Result,
  typed ::Error,
 };
  
  // Explicit import for Result and its variants for pattern matching
  use std ::result ::Result :: { self, Ok, Err };

  /// A wrapper type for representing the name of a package.
  ///
  /// This struct encapsulates a `String` that holds the name of a package.
  #[ derive
  (
  Debug, Default, Clone, Hash, Ord, PartialOrd, Eq, PartialEq,
  derive_tools ::Display, derive_tools ::Deref, derive_tools ::From, derive_tools ::AsRef,
 ) ]
  pub struct PackageName( String );

  //
  /// Represents different types of packages in a Cargo workspace.
  ///
  /// It is designed to accommodate the two primary types of package
  /// representations within a Cargo workspace.
  #[ derive( Debug, Clone ) ]
  pub enum Package< 'a >
  {

  /// `Cargo.toml` file.
  Manifest( Box< Manifest > ), // fix clippy
  /// Cargo package package.
  WorkspacePackageRef( WorkspacePackageRef< 'a > ),
 }

  /// Represents errors related to package handling.
  #[ derive( Debug, Error ) ]
  pub enum PackageError
  {
  /// Manifest error.
  #[ error( "Manifest error. Reason: {0}." ) ]
  Manifest( #[ from ] manifest ::ManifestError ),
  /// Fail to load package.
  #[ error( "Fail to load package." ) ]
  WorkspacePackageRef,
  /// Fail to load remote package.
  #[ error( "Fail to load remote package." ) ]
  LoadRemotePackage,
  /// Fail to get crate local path.
  #[ error( "Fail to get crate local path." ) ]
  LocalPath,
  /// Fail to read archive
  #[ error( "Fail to read archive" ) ]
  ReadArchive,
  /// Try to identify something as a package.
  #[ error( "Not a package" ) ]
  NotAPackage,
 }

  // fix clippy
  impl TryFrom< ManifestFile > for Package< '_ >
  {
  type Error = PackageError;

  fn try_from( value: ManifestFile ) -> Result< Self, Self ::Error >
  {
   let package = Manifest ::try_from( value )?;
   if !package.package_is()
   {
  return Err( PackageError ::NotAPackage );
 }

   Result ::Ok( Self ::Manifest( Box ::new( package ) ) ) // fix clippy
 }
 }

  impl TryFrom< CrateDir > for Package< '_ > // fix clippy
  {
  type Error = PackageError;

  fn try_from( value: CrateDir ) -> Result< Self, Self ::Error >
  {
   let package = Manifest ::try_from( value )?;
   if !package.package_is()
   {
  return Err( PackageError ::NotAPackage );
 }

   Result ::Ok( Self ::Manifest( Box ::new( package ) ) ) // fix clippy
 }
 }

  impl TryFrom< Manifest > for Package< '_ > // fix clippy
  {
  type Error = PackageError;

  fn try_from( value: Manifest ) -> Result< Self, Self ::Error >
  {
   if !value.package_is()
   {
  return Err( PackageError ::NotAPackage );
 }

   Result ::Ok( Self ::Manifest( Box ::new( value ) ) ) // fix clippy
 }
 }

  impl< 'a > From< WorkspacePackageRef< 'a > > for Package< 'a >
  {
  fn from( value: WorkspacePackageRef< 'a > ) -> Self
  {
   Self ::WorkspacePackageRef( value )
 }
 }

  impl Package< '_ > // fix clippy
  {

  /// Path to `Cargo.toml`
  /// # Panics
  /// qqq: doc
  #[ must_use ]
  pub fn manifest_file( &self ) -> ManifestFile
  {
   match self
   {
  Self ::Manifest( package ) => package.manifest_file.clone(),
  Self ::WorkspacePackageRef( package ) => package.manifest_file().unwrap(),
 }
 }

  /// Path to folder with `Cargo.toml`
  /// # Panics
  /// qqq: doc
  #[ must_use ]
  pub fn crate_dir( &self ) -> CrateDir
  {
   match self
   {
  Self ::Manifest( package ) => package.crate_dir(),
  Self ::WorkspacePackageRef( package ) => package.crate_dir().unwrap(),
 }
 }

  /// Package version
  ///
  /// Resolves the package version whether it's defined directly in the package
  /// manifest or inherited from the workspace using `version.workspace = true`.
  ///
  /// # Returns
  ///
  /// Returns the version string if found.
  ///
  /// # Errors
  ///
  /// Returns error if:
  /// - Version field is missing or invalid
  /// - Workspace inheritance is declared but cannot be resolved
  pub fn version( &self ) -> Result< String, PackageError >
  {
   match self
   {
  Self ::Manifest( package ) =>
  {
   // Use Manifest::version() which handles both direct and workspace-inherited versions
   package.version().map_err( PackageError ::Manifest )
 }
  Self ::WorkspacePackageRef( package ) =>
  {
   Result ::Ok( package.version().to_string() )
 }
 }
 }

  /// Check that module is local.
  #[ must_use ]
  pub fn local_is( &self ) -> bool
  {
   match self
   {
  Self ::Manifest( package ) =>
  {
   // verify that package not empty
   package.local_is()
 }
  Self ::WorkspacePackageRef( package ) =>
  {
   !( package.publish().is_none() || package.publish().as_ref().is_some_and( | p | p.is_empty() ) )
   // Ok( !( package.publish().is_none() || package.publish().as_ref().is_some_and( | p | p.is_empty() ) ) )
 }
 }
 }

  /// Returns the `Manifest`
  /// # Errors
  /// qqq: doc
  pub fn manifest( &self ) -> Result< Manifest, PackageError >
  {
   match self
   {
  Package ::Manifest( package ) => Ok( *package.clone() ), // fix clippy
  Package ::WorkspacePackageRef( package ) => Manifest ::try_from
  (
   package.manifest_file().map_err( | _ | PackageError ::LocalPath )? // qqq: use trait
 )
  .map_err( | _ | PackageError ::WorkspacePackageRef ),
 }
 }

 }

  //

  /// Determines if a package needs to be published by comparing its local `.crate` file against the version on crates.io.
  ///
  /// This function first locates the local, pre-packaged `.crate` file and then attempts to download
  /// the corresponding version from the remote registry. It returns `true` if there are differences
  /// or if the remote version does not exist (implying a new version to be published).
  ///
  /// **Prerequisite** : The local package must have been packaged beforehand (e.g., using `cargo package`).
  ///
  /// # Arguments
  ///
  /// * `package` - A reference to the `Package` struct for which the check is being performed.
  /// * `path` - An optional path to a directory that contains the packaged `.crate` file.
  ///   If `Some`, this path is used directly. If `None`, the path is constructed using `target_dir`.
  /// * `target_dir` - The path to the workspace's `target` directory, used to find the
  ///   local `.crate` file if a specific `path` is not provided.
  ///
  /// # Returns
  ///
  /// - `Ok(true)` if the local and remote `.crate` files have differences, or if the package
  ///   version does not exist on crates.io (e.g., a 403 Forbidden error is received).
  /// - `Ok(false)` if the local and remote packages are identical.
  ///
  /// # Errors
  ///
  /// This function will return an error in the following cases :
  ///
  /// - `PackageError ::LocalPath` : If the path to the local `.crate` file cannot be determined.
  /// - `PackageError ::ReadArchive` : If the local `.crate` file exists but cannot be read.
  /// - `PackageError ::LoadRemotePackage` : If downloading the remote package fails for reasons
  ///   other than a non-existent version (e.g., network issues).
  /// - Any error that occurs while trying to read the package's name or version.
  pub fn publish_need( package: &Package< '_ >, path: Option< path ::PathBuf >, target_dir: &std ::path ::Path ) -> Result< bool, PackageError >
  {
  let name = package.name()?;
  let version = package.version()?;
  let local_package_path = path
  .map( | p | p.join( format!( "package/{name}-{version}.crate" ) ) )
  .unwrap_or( packed_crate ::local_path( name, &version, target_dir ).map_err( | _ | PackageError ::LocalPath )? );

  let local_package = CrateArchive ::read( local_package_path ).map_err( | _ | PackageError ::ReadArchive )?;
  let remote_package = match CrateArchive ::download_crates_io( name, version )
  {
   Ok( archive ) => archive,
   // qqq: fix. we don't have to know about the http status code
   Err( ureq ::Error ::Status( 403, _ ) ) => return Result ::Ok( true ),
   _ => return Err( PackageError ::LoadRemotePackage ),
 };

  Result ::Ok( diff ::crate_diff( &local_package, &remote_package ).exclude( diff ::PUBLISH_IGNORE_LIST ).has_changes() )
 }

}

//

crate ::mod_interface!
{

  exposed use Package;
  own use PackageName;
  own use PackageError;

  own use publish_need;

}