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std::{ + fs::DirEntry, + path::{Path, PathBuf}, +}; + +use crate::context::Context; + +mod context { + use std::collections::BTreeMap; + + #[derive(Default)] + pub struct Context { + output: OutputDirectory, + } + + #[derive(Default)] + struct OutputDirectory { + entries: BTreeMap + } + + enum OutputFile { + Dir(OutputDirectory), + BinaryFile(Vec), + StringFile(String), + } + + impl Context { + + } +} + +mod write { + use color_eyre::{Result, eyre::Context}; + use std::path::Path; + + pub fn initialize(base: &Path) -> Result<()> { + std::fs::remove_dir_all(base).wrap_err("deleting previous output")?; + Ok(std::fs::create_dir_all(base).wrap_err("creating output")?) + } + + pub fn write_file(base: &Path, name: &str, content: &str) -> Result<()> { + Ok(std::fs::write(base.join(name), content)?) + } +} + +pub fn generate(out_base: PathBuf, root: &Path) -> Result<()> { + let mut ctx = Context::default(); + + collect_posts(&mut ctx, &root.join("posts")) + .wrap_err_with(|| format!("reading posts from {}", root.display()))?; + + write::initialize(&out_base).wrap_err("initializing output")?; + for output in ctx.outputs { + match output { + OutputFile::Post { + name, + frontmatter, + html_body, + } => { + write::write_file(&out_base, &name, &html_body)?; + } + } + } + + Ok(()) +} + +fn collect_posts(ctx: &mut Context, path: &Path) -> Result<()> { + let entries = std::fs::read_dir(path)?; + + for entry in entries { + let entry = entry?; + let name = entry.file_name(); + let name = name.to_str().ok_or_eyre("invalid UTF-8 filename")?; + + collect_post(ctx, &entry, name).wrap_err_with(|| format!("generating post {name}"))?; + } + + Ok(()) +} + +fn collect_post(ctx: &mut Context, entry: &DirEntry, name: &str) -> Result<()> { + let meta = entry.metadata()?; + if meta.is_dir() { + todo!("directory post"); + } + + let Some((name, ext)) = name.split_once('.') else { + bail!("invalid post filename {name}, must be *.md"); + }; + ensure!( + ext == "md", + "invalid filename {name}, only .md extensions are allowed" + ); + + let content = std::fs::read_to_string(entry.path()).wrap_err("reading contents")?; + + let rest = content + .strip_prefix("---\n") + .ok_or_eyre("post must start with `---`")?; + let (frontmatter, body) = rest + .split_once("---\n") + .ok_or_eyre("unterminated frontmatter, needs another `---`")?; + + let frontmatter = + serde_norway::from_str::(frontmatter).wrap_err("¡nvalid frontmatter")?; + + let html_body = parse_post_body(&body).wrap_err("parsing post")?; + + ctx.outputs.push(OutputFile::Post { + name: name.to_owned(), + frontmatter, + html_body, + }); + + Ok(()) +} + +#[derive(serde::Deserialize)] +struct Frontmatter { + title: String, + date: String, +} + +fn parse_post_body(content: &str) -> Result { + let mut options = pulldown_cmark::Options::empty(); + options |= Options::ENABLE_TABLES | Options::ENABLE_FOOTNOTES | Options::ENABLE_STRIKETHROUGH; + let parser = pulldown_cmark::Parser::new_ext(content, options); + + let mut output = String::new(); + pulldown_cmark::html::push_html(&mut output, parser); + Ok(output) +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..0b0f327 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,5 @@ +use std::{path::Path}; + +fn main() -> color_eyre::Result<()> { + blogamer::generate("output".into(), Path::new("example")) +}