use std::fs;
use std::io;
use std::path::{Path, PathBuf};
use super::diagnostic_output::StandardErrorMessages;
use super::entry_tree::TreeFile;
use super::exit_status::ExitStatus;
use super::located_project::LocatedProject;
use super::program_file::ProgramFile;
use super::skipped_directory::SkippedDirectory;
use super::terminal::Terminal;
use super::tree_bounds::TreeBounds;
use super::unreadable_file::UnreadableFile;
use crate::language::Language;
pub struct SourceWalk {
root: PathBuf,
bounds: TreeBounds,
skipped: SkippedDirectory,
left_out: Vec<PathBuf>,
}
impl SourceWalk {
pub fn of(project: &LocatedProject) -> Self {
let root = Self::walked_root(project);
let placement = project.placement();
let left_out = [placement.tasks_directory(), placement.tests_directory()]
.iter()
.filter_map(|directory| ProgramFile::canonical(directory))
.collect();
Self {
skipped: SkippedDirectory::for_walk_of(&root),
bounds: TreeBounds::of(&root),
root,
left_out,
}
}
pub fn module_paths(&self, terminal: &mut Terminal) -> Result<Vec<String>, ExitStatus> {
let files = self.files().map_err(|error| {
UnreadableFile::new(&self.root, &error).report_to(&StandardErrorMessages)
})?;
if let Some(file) = files.iter().find(|file| file.is_unnamable()) {
return Err(file.report_unnamable());
}
TreeFile::refuse_compiler_modules(&files, terminal)?;
Ok(files.into_iter().map(TreeFile::into_module).collect())
}
fn walked_root(project: &LocatedProject) -> PathBuf {
let source_root = project.source_root();
if source_root.as_os_str().is_empty() {
PathBuf::from(Terminal::WORKING_DIRECTORY)
} else {
source_root
}
}
fn files(&self) -> io::Result<Vec<TreeFile>> {
let mut files = Vec::new();
self.collect(&self.root, &mut files)?;
files.sort();
Ok(files)
}
fn collect(&self, directory: &Path, files: &mut Vec<TreeFile>) -> io::Result<()> {
for entry in fs::read_dir(directory)? {
let path = entry?.path();
if path.is_dir() {
self.collect_inside(&path, files)?;
} else if let Some(module) = self.module_of(&path) {
files.push(TreeFile::new(module, path));
}
}
Ok(())
}
fn collect_inside(&self, directory: &Path, files: &mut Vec<TreeFile>) -> io::Result<()> {
if self.walks_into(directory) {
self.collect(directory, files)?;
}
Ok(())
}
fn walks_into(&self, directory: &Path) -> bool {
match self.bounds.inside(directory) {
Some(directory) => {
!self.skipped.is_skipped(&directory)
&& !self.left_out.contains(&directory)
&& !Self::holds_a_project(&directory)
}
None => false,
}
}
fn holds_a_project(directory: &Path) -> bool {
directory.join(Language::project_file_name()).is_file()
}
fn module_of(&self, file: &Path) -> Option<String> {
if file.extension()? != Language::EXTENSION || ProgramFile::is_project_file(file) {
return None;
}
ProgramFile::module_name(file.strip_prefix(&self.root).ok()?)
}
}