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use crate::config::Config;
use crate::post::{Error as ParseError, Parser as PostParser};
use crate::write::{Error as WriteError, *};
use gtmpl::Template;
use std::fmt;
use std::path::{Path, PathBuf};
pub fn build_site(config: &Config) -> Result<()> {
fn rmdir(dir: &Path) -> Result<()> {
match std::fs::remove_dir_all(dir) {
Ok(x) => Ok(x),
Err(e) => match e.kind() {
std::io::ErrorKind::NotFound => Ok(()),
_ => Err(Error::Clean {
path: dir.to_owned(),
err: e,
}),
},
}
}
let post_parser = PostParser::new(
&config.index_url,
&config.posts_url,
&config.posts_output_directory,
);
let posts = post_parser.parse_posts(&config.posts_source_directory)?;
let index_template = parse_template(config.index_template.iter())?;
let posts_template = parse_template(config.posts_template.iter())?;
rmdir(&config.index_output_directory)?;
rmdir(&config.posts_output_directory)?;
rmdir(&config.static_output_directory)?;
let writer = Writer {
posts_template: &posts_template,
index_template: &index_template,
index_page_size: config.index_page_size,
index_base_url: &config.index_url,
index_output_directory: &config.index_output_directory,
home_page: &config.home_page,
static_url: &config.static_url,
};
writer.write_posts(&posts)?;
copy_dir(
&config.static_source_directory,
&config.static_output_directory,
)
}
fn copy_dir(src: &Path, dst: &Path) -> Result<()> {
std::fs::create_dir(dst)?;
for entry in std::fs::read_dir(src)? {
let entry = entry?;
if entry.file_type()?.is_dir() {
copy_dir(src, &dst.join(entry.file_name()))?;
} else {
std::fs::copy(src.join(entry.file_name()), dst.join(entry.file_name()))?;
}
}
Ok(())
}
fn parse_template<P: AsRef<Path>>(template_files: impl Iterator<Item = P>) -> Result<Template> {
let mut contents = String::new();
for template_file in template_files {
use std::fs::File;
use std::io::Read;
let template_file = template_file.as_ref();
File::open(&template_file)
.map_err(|e| Error::OpenTemplateFile {
path: template_file.to_owned(),
err: e,
})?
.read_to_string(&mut contents)?;
contents.push(' ');
}
let mut template = Template::default();
template.parse(&contents).map_err(Error::ParseTemplate)?;
Ok(template)
}
type Result<T> = std::result::Result<T, Error>;
#[derive(Debug)]
pub enum Error {
Parse(ParseError),
Write(WriteError),
Clean { path: PathBuf, err: std::io::Error },
OpenTemplateFile { path: PathBuf, err: std::io::Error },
ParseTemplate(String),
Io(std::io::Error),
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
Error::Parse(err) => err.fmt(f),
Error::Write(err) => err.fmt(f),
Error::Clean { path, err } => {
write!(f, "Cleaning directory '{}': {}", path.display(), err)
}
Error::OpenTemplateFile { path, err } => {
write!(f, "Opening template file '{}': {}", path.display(), err)
}
Error::ParseTemplate(err) => err.fmt(f),
Error::Io(err) => err.fmt(f),
}
}
}
impl std::error::Error for Error {
fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
match self {
Error::Parse(err) => Some(err),
Error::Write(err) => Some(err),
Error::Clean { path: _, err } => Some(err),
Error::OpenTemplateFile { path: _, err } => Some(err),
Error::ParseTemplate(_) => None,
Error::Io(err) => Some(err),
}
}
}
impl From<std::io::Error> for Error {
fn from(err: std::io::Error) -> Error {
Error::Io(err)
}
}
impl From<ParseError> for Error {
fn from(err: ParseError) -> Error {
Error::Parse(err)
}
}
impl From<WriteError> for Error {
fn from(err: WriteError) -> Error {
Error::Write(err)
}
}