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/**
** \file misc/file-library.hh
** \brief Manage sets of inclusion paths.
*/
#pragma once
#include <filesystem>
#include <string>
#include <vector>
namespace misc
{
using path = std::filesystem::path;
/** \brief Manage search path.
Store search path and all informations used for handling
paths when processing import directives. */
class file_library
{
public:
/// \name Constructor.
/// \{
/// An empty library.
file_library();
/// Init the library with one path.
file_library(path p);
/// \}
/// \name Managing inclusion paths.
/// \{
void append_dir(path p);
void prepend_dir(path p);
/// \}
/// \name current directory.
/// \{
void push_current_directory(path p);
void pop_current_directory();
path current_directory_get() const;
/// \}
/// \name Findind file
/// \{
/** \brief Search a file.
Determine real path of \a file, by looking in search path if
necessary.
\return Directory containing \a file, or "" if not found. */
path find_file(const std::string& file);
/// \brief Check if \a file exists in directory \a dir.
bool find_in_directory(const path& dir, const std::string& file) const;
/// \}
/// \name Printing.
/// \{
std::ostream& dump(std::ostream& ostr) const;
/// \}
private:
/// Push the working directory on the stack.
void push_cwd();
/** \brief Find file "\a relative_path / \a filename" using include path.
\return Absolute path where the file lies or empty path
if the file does not exist. */
path find_in_search_path(const path& relative_path,
const std::string& filename) const;
/** \brief Split the string with character ':', and insert each
resultant string as a new search path. */
void append_dir_list(std::string path_list);
/** \brief Ensure that path is absolute by prepending current
directory if necessary */
path ensure_absolute_path(path p) const;
using path_list_type = std::vector<path>;
/// Inclusion path list.
path_list_type search_path_;
/// Current directory stack.
path_list_type current_directory_;
};
std::ostream& operator<<(std::ostream& ostr, const file_library& l);
} // namespace misc
#include <misc/file-library.hxx>
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