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lib.rs
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lib.rs
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#![forbid(unsafe_code)]
use sha2::Digest;
use std::borrow::Cow;
use std::path::Path;
use std::time::SystemTime;
use std::{fs, io};
#[cfg_attr(all(debug_assertions, not(feature = "debug-embed")), allow(unused))]
pub struct FileEntry {
pub rel_path: String,
pub full_canonical_path: String,
}
#[cfg(not(feature = "include-exclude"))]
pub fn is_path_included(_path: &str, _includes: &[&str], _excludes: &[&str]) -> bool {
true
}
#[cfg(feature = "include-exclude")]
pub fn is_path_included(rel_path: &str, includes: &[&str], excludes: &[&str]) -> bool {
use globset::Glob;
// ignore path matched by exclusion pattern
for exclude in excludes {
let pattern = Glob::new(exclude)
.unwrap_or_else(|_| panic!("invalid exclude pattern '{}'", exclude))
.compile_matcher();
if pattern.is_match(rel_path) {
return false;
}
}
// accept path if no includes provided
if includes.is_empty() {
return true;
}
// accept path if matched by inclusion pattern
for include in includes {
let pattern = Glob::new(include)
.unwrap_or_else(|_| panic!("invalid include pattern '{}'", include))
.compile_matcher();
if pattern.is_match(rel_path) {
return true;
}
}
false
}
#[cfg_attr(all(debug_assertions, not(feature = "debug-embed")), allow(unused))]
pub fn get_files<'patterns>(folder_path: String, includes: &'patterns [&str], excludes: &'patterns [&str]) -> impl Iterator<Item = FileEntry> + 'patterns {
walkdir::WalkDir::new(&folder_path)
.follow_links(true)
.sort_by_file_name()
.into_iter()
.filter_map(|e| e.ok())
.filter(|e| e.file_type().is_file())
.filter_map(move |e| {
let rel_path = path_to_str(e.path().strip_prefix(&folder_path).unwrap());
let full_canonical_path = path_to_str(std::fs::canonicalize(e.path()).expect("Could not get canonical path"));
let rel_path = if std::path::MAIN_SEPARATOR == '\\' {
rel_path.replace('\\', "/")
} else {
rel_path
};
if is_path_included(&rel_path, includes, excludes) {
Some(FileEntry { rel_path, full_canonical_path })
} else {
None
}
})
}
/// A file embedded into the binary
pub struct EmbeddedFile {
pub data: Cow<'static, [u8]>,
pub metadata: Metadata,
}
/// Metadata about an embedded file
pub struct Metadata {
hash: [u8; 32],
last_modified: Option<u64>,
}
impl Metadata {
#[doc(hidden)]
pub fn __rust_embed_new(hash: [u8; 32], last_modified: Option<u64>) -> Self {
Self { hash, last_modified }
}
/// The SHA256 hash of the file
pub fn sha256_hash(&self) -> [u8; 32] {
self.hash
}
/// The last modified date in seconds since the UNIX epoch. If the underlying
/// platform/file-system does not support this, None is returned.
pub fn last_modified(&self) -> Option<u64> {
self.last_modified
}
}
pub fn read_file_from_fs(file_path: &Path) -> io::Result<EmbeddedFile> {
let data = fs::read(file_path)?;
let data = Cow::from(data);
let mut hasher = sha2::Sha256::new();
hasher.update(&data);
let hash: [u8; 32] = hasher.finalize().into();
let last_modified = fs::metadata(file_path)?.modified().ok().map(|last_modified| {
last_modified
.duration_since(SystemTime::UNIX_EPOCH)
.expect("Time before the UNIX epoch is unsupported")
.as_secs()
});
Ok(EmbeddedFile {
data,
metadata: Metadata { hash, last_modified },
})
}
fn path_to_str<P: AsRef<std::path::Path>>(p: P) -> String {
p.as_ref().to_str().expect("Path does not have a string representation").to_owned()
}