use std::path::{Path, PathBuf};
use super::crate_section::CrateSection;
use super::exit_status::ExitStatus;
use super::library_walk::LibraryWalk;
use super::program_file::ProgramFile;
use super::project_crates::ProjectCrates;
use super::standard_error::StandardError;
use super::terminal::Terminal;
use crate::diagnostic::{Diagnostic, Diagnostics};
use crate::language::Language;
use crate::modules::{LibraryTable, SearchScope};
use crate::project::{CrateDependency, Project, ProjectProblems};
pub struct LocatedProject {
root: PathBuf,
project: Project,
libraries: LibraryTable,
crates: ProjectCrates,
crate_library: Option<String>,
}
impl LocatedProject {
pub fn search_from(directory: &Path, terminal: &Terminal) -> Result<Option<Self>, ExitStatus> {
let Some(root) = Self::nearest_root(directory)? else {
return Ok(None);
};
let mut scratch = terminal.scratch();
let project = scratch.load_project(&root.join(Language::project_file_name()))?;
let walked = LibraryWalk::walk(&mut scratch, &root, &project)?;
let crates = ProjectCrates::new(
root.clone(),
project.name.clone(),
walked.crates,
walked.dev_crates,
);
Ok(Some(Self {
root,
project,
libraries: walked.table,
crates,
crate_library: walked.crate_library,
}))
}
fn nearest_root(directory: &Path) -> Result<Option<PathBuf>, ExitStatus> {
match Self::canonical_root(directory) {
Some(root) => Ok(Some(Self::shown(&root)?)),
None => Ok(None),
}
}
pub fn canonical_root(directory: &Path) -> Option<PathBuf> {
let start = ProgramFile::canonical(directory)?;
let file_name = Language::project_file_name();
start
.ancestors()
.find(|ancestor| ancestor.join(&file_name).is_file())
.map(Path::to_path_buf)
}
fn shown(root: &Path) -> Result<PathBuf, ExitStatus> {
let working_directory = Terminal::canonical(Path::new(Terminal::WORKING_DIRECTORY))?;
Ok(root
.strip_prefix(&working_directory)
.unwrap_or(root)
.to_path_buf())
}
pub fn report_no_path() -> ExitStatus {
StandardError::write_line(format_args!(
"error: no path given, and no `{}` in this directory or a parent\n\
help: name a path, or run the command inside a project",
Language::project_file_name()
));
ExitStatus::UsageError
}
pub fn lend_libraries(project: Option<&Self>, file: ProgramFile) -> ProgramFile {
match project {
Some(project) => file.with_libraries(project.libraries.clone()),
None => file,
}
}
pub fn name(&self) -> &str {
&self.project.name
}
pub fn entry(&self) -> ProgramFile {
let entry = self.root.join(&self.project.entry);
self.file_within(entry)
}
pub fn is_entry(&self, file: &ProgramFile) -> bool {
let entry = ProgramFile::canonical(&self.root.join(&self.project.entry));
entry == ProgramFile::canonical(file.path())
}
pub fn file_within(&self, path: PathBuf) -> ProgramFile {
let tasks_directory = self.tasks_directory();
if ProgramFile::relative_module(&path, &tasks_directory).is_some() {
return self.task_file(ProgramFile::within(path, tasks_directory));
}
let scope = SearchScope::in_project(&tasks_directory);
ProgramFile::inside_or_beside(path, self.source_root())
.with_libraries(self.libraries.clone())
.within_scope(scope)
}
pub fn test_file(&self, file: ProgramFile) -> ProgramFile {
let scope = SearchScope::tests(&self.tasks_directory());
self.beside_source_root(file).within_scope(scope)
}
pub fn task_file(&self, file: ProgramFile) -> ProgramFile {
let scope = SearchScope::tasks(&self.tasks_directory(), &self.tests_directory());
self.beside_source_root(file).within_scope(scope)
}
fn beside_source_root(&self, file: ProgramFile) -> ProgramFile {
file.with_fallback_root(self.source_root())
.with_libraries(self.libraries.clone())
}
pub fn tests_directory(&self) -> PathBuf {
self.root.join(SearchScope::TESTS_DIRECTORY)
}
pub fn tasks_directory(&self) -> PathBuf {
self.root.join(SearchScope::TASKS_DIRECTORY)
}
pub fn root(&self) -> &Path {
&self.root
}
pub fn source_root(&self) -> PathBuf {
ProgramFile::directory_of(&self.root.join(&self.project.entry))
}
pub fn refuse_crates(&self, command: &str, terminal: &Terminal) -> Result<(), ExitStatus> {
if !self.crates.has_crates() {
return Ok(());
}
let mut scratch = terminal.scratch();
let project = scratch.load_project(&self.project_file())?;
let mut problems = Diagnostics::default();
problems.push(self.crate_use(&project, command));
Err(scratch.report(&problems))
}
fn crate_use(&self, project: &Project, command: &str) -> Diagnostic {
if let Some(dependency) = project.dependencies.first() {
let label = format!("this project uses crate `{}`", dependency.name);
return ProjectProblems::crates_unavailable_to(command, dependency.name_span, label);
}
let library = project
.libraries
.iter()
.find(|library| Some(&library.name) == self.crate_library.as_ref())
.expect("a project with crates and no crate of its own lists a library that adds them");
let label = format!("library `{}` adds crates", library.name);
ProjectProblems::crates_unavailable_to(command, library.name_span, label)
}
pub fn own_crate(&self, section: CrateSection, name: &str) -> Option<&CrateDependency> {
section
.listed(&self.project)
.iter()
.find(|dependency| dependency.name == name)
}
pub fn project_file(&self) -> PathBuf {
self.root.join(Language::project_file_name())
}
pub fn build_directory(&self) -> PathBuf {
self.crates.build_directory()
}
pub fn crates(&self) -> &ProjectCrates {
&self.crates
}
}