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mod format;
pub mod source;
use error::*;
use source::Source;
use std::collections::HashMap;
use std::path::{Path, PathBuf};
use value::Value;
pub use self::format::FileFormat;
use self::source::FileSource;
pub use self::source::string::FileSourceString;
pub use self::source::file::FileSourceFile;
#[derive(Clone, Debug)]
pub struct File<T>
where
T: FileSource,
{
source: T,
/// Format of file (which dictates what driver to use).
format: Option<FileFormat>,
/// A required File will error if it cannot be found
required: bool,
}
impl File<source::string::FileSourceString> {
pub fn from_str(s: &str, format: FileFormat) -> Self {
File {
format: Some(format),
required: true,
source: s.into(),
}
}
}
impl File<source::file::FileSourceFile> {
pub fn new(name: &str, format: FileFormat) -> Self {
File {
format: Some(format),
required: true,
source: source::file::FileSourceFile::new(name.into()),
}
}
/// Given the basename of a file, will attempt to locate a file by setting its
/// extension to a registered format.
pub fn with_name(name: &str) -> Self {
File {
format: None,
required: true,
source: source::file::FileSourceFile::new(name.into()),
}
}
}
impl<'a> From<&'a Path> for File<source::file::FileSourceFile> {
fn from(path: &'a Path) -> Self {
File {
format: None,
required: true,
source: source::file::FileSourceFile::new(path.to_path_buf()),
}
}
}
impl From<PathBuf> for File<source::file::FileSourceFile> {
fn from(path: PathBuf) -> Self {
File {
format: None,
required: true,
source: source::file::FileSourceFile::new(path),
}
}
}
impl<T: FileSource> File<T> {
pub fn format(mut self, format: FileFormat) -> Self {
self.format = Some(format);
self
}
pub fn required(mut self, required: bool) -> Self {
self.required = required;
self
}
}
impl<T: FileSource> Source for File<T>
where
T: 'static,
T: Sync + Send,
{
fn clone_into_box(&self) -> Box<dyn Source + Send + Sync> {
Box::new((*self).clone())
}
fn collect(&self) -> Result<HashMap<String, Value>> {
// Coerce the file contents to a string
let (uri, contents, format) = match self
.source
.resolve(self.format)
.map_err(|err| ConfigError::Foreign(err))
{
Ok((uri, contents, format)) => (uri, contents, format),
Err(error) => {
if !self.required {
return Ok(HashMap::new());
}
return Err(error);
}
};
// Parse the string using the given format
format
.parse(uri.as_ref(), &contents)
.map_err(|cause| ConfigError::FileParse {
uri,
cause,
})
}
}
|