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//! Module containing utilities for the filestore implementation
//!
use std::collections::BTreeMap;
use std::path::Path;
use std::path::PathBuf;
use anyhow::Error;
use anyhow::Result;
use anyhow::anyhow;
use indicatif::ProgressBar;
use resiter::AndThen;
use resiter::Map;
use walkdir::WalkDir;
use crate::filestore::Artifact;
use crate::package::PackageName;
use crate::package::PackageVersionConstraint;
/// The actual filestore implementation
///
/// Because the "staging" filestore and the "release" filestore function the same underneath, we
/// provide this type as the implementation.
///
/// It can then be wrapped into the actual interface of this module with specialized functionality.
pub struct FileStoreImpl {
pub(in crate::filestore) root: PathBuf,
store: BTreeMap<PathBuf, Artifact>,
}
impl FileStoreImpl {
/// Loads the passed path recursively into a Path => Artifact mapping
pub fn load(root: &Path, progress: ProgressBar) -> Result<Self> {
if root.is_dir() {
let store = WalkDir::new(root)
.follow_links(false)
.into_iter()
.filter_entry(|e| e.file_type().is_file())
.map_err(Error::from)
.map_ok(|f| f.path().to_path_buf())
.and_then_ok(|pb| {
progress.tick();
Artifact::load(&pb).map(|a| (pb, a))
})
.collect::<Result<BTreeMap<PathBuf, Artifact>>>()?;
Ok(FileStoreImpl { root: root.to_path_buf(), store })
} else {
Err(anyhow!("File store cannot be loaded from non-directory: {}", root.display()))
}
}
pub fn root_path(&self) -> &Path {
&self.root
}
pub fn path_exists_in_store_root(&self, p: &Path) -> bool {
self.root.join(p).is_file()
}
pub (in crate::filestore) fn values(&self) -> impl Iterator<Item = &Artifact> {
self.store.values()
}
pub (in crate::filestore) fn load_from_path(&mut self, pb: &PathBuf) -> Result<&Artifact> {
if !self.is_sub_path(pb)? {
Err(anyhow!("Not a sub-path of {}: {}", self.root.display(), pb.display()))
} else {
if self.store.get(pb).is_some() {
Err(anyhow!("Entry exists: {}", pb.display()))
} else {
Ok(self.store.entry(pb.to_path_buf()).or_insert(Artifact::load(pb)?))
}
}
}
fn is_sub_path(&self, p: &Path) -> Result<bool> {
p.canonicalize()
.map(|c| c.starts_with(&self.root))
.map_err(Error::from)
}
pub fn get(&self, p: &Path) -> Option<&Artifact> {
self.store.get(p)
}
pub fn get_artifact_by_name(&self, name: &PackageName) -> Vec<&Artifact> {
self.store
.values()
.filter(|a| a.name() == name)
.collect()
}
pub fn get_artifact_by_name_and_version(&self, name: &PackageName, version: &PackageVersionConstraint) -> Vec<&Artifact> {
self.store
.values()
.filter(|a| a.name() == name && version.matches(a.version()))
.collect()
}
}
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