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100644 --- a/src/adapters.rs +++ b/src/adapters.rs @@ -13,7 +13,7 @@ use std::io::Write; use std::rc::Rc; pub enum Matcher { - MimeType(Regex), // todo: generic pattern? + // MimeType(Regex), FileName(Regex), } @@ -27,7 +27,7 @@ pub struct FileMeta { // filename is not actually a utf8 string, but since we can't do regex on OsStr and can't get a &[u8] from OsStr either, // and since we probably only want to do matching on ascii stuff anyways, this is the filename as a string with non-valid bytes removed pub lossy_filename: String, - pub mimetype: String, + // pub mimetype: String, } pub trait GetMetadata { @@ -51,26 +51,26 @@ pub fn init_adapters() -> Result Option ]; let mut fname_regexes = vec![]; - let mut mime_regexes = vec![]; + //let mut mime_regexes = vec![]; for adapter in adapters.into_iter() { let metadata = adapter.metadata(); for matcher in &metadata.matchers { match matcher { - Matcher::MimeType(re) => mime_regexes.push((re.clone(), adapter.clone())), + //Matcher::MimeType(re) => mime_regexes.push((re.clone(), adapter.clone())), Matcher::FileName(re) => fname_regexes.push((re.clone(), adapter.clone())), }; } } let fname_regex_set = RegexSet::new(fname_regexes.iter().map(|p| p.0.as_str()))?; - let mime_regex_set = RegexSet::new(mime_regexes.iter().map(|p| p.0.as_str()))?; + //let mime_regex_set = RegexSet::new(mime_regexes.iter().map(|p| p.0.as_str()))?; return Ok(move |meta: FileMeta| { // todo: handle multiple matches for m in fname_regex_set.matches(&meta.lossy_filename) { return Some(fname_regexes[m].1.clone()); } - for m in mime_regex_set.matches(&meta.mimetype) { + /*for m in mime_regex_set.matches(&meta.mimetype) { return Some(mime_regexes[m].1.clone()); - } + }*/ return None; }); } diff --git a/src/adapters/ffmpeg.rs b/src/adapters/ffmpeg.rs index 2675a59..9dc985b 100644 --- a/src/adapters/ffmpeg.rs +++ b/src/adapters/ffmpeg.rs @@ -15,7 +15,7 @@ impl FFmpegAdapter { pub fn new() -> FFmpegAdapter { FFmpegAdapter { _metadata: AdapterMeta { - name: "FFmpeg".to_owned(), + name: "ffmpeg".to_owned(), version: 1, matchers: extensions.iter().map(|s| ExtensionMatcher(s)).collect(), }, diff --git a/src/adapters/pandoc.rs b/src/adapters/pandoc.rs index 8064c6c..6a62c45 100644 --- a/src/adapters/pandoc.rs +++ b/src/adapters/pandoc.rs @@ -39,6 +39,7 @@ use std::process::Command; //"txt" -> Just "markdown" //"xhtml" -> Just "html" //"wiki" -> Just "mediawiki" + static extensions: &[&str] = &["epub", "odt", "docx", "pptx", "fb2", "icml", "rtf", "ipynb"]; pub struct PandocAdapter { @@ -67,7 +68,7 @@ impl SpawningFileAdapter for PandocAdapter { let mut cmd = Command::new("pandoc"); cmd // simpler markown (with more information loss but plainer text) - .arg("--to=markdown-header_attributes-link_attributes-fenced_divs-markdown_in_html_blocks-raw_html-native_divs-native_spans-bracketed_spans") + .arg("--to=commonmark-header_attributes-link_attributes-fenced_divs-markdown_in_html_blocks-raw_html-native_divs-native_spans-bracketed_spans") .arg("--wrap=none") .arg("--atx-headers") .arg("--") diff --git a/src/adapters/poppler.rs b/src/adapters/poppler.rs index 2a1e140..b7058f9 100644 --- a/src/adapters/poppler.rs +++ b/src/adapters/poppler.rs @@ -14,7 +14,7 @@ impl PopplerAdapter { pub fn new() -> PopplerAdapter { PopplerAdapter { _metadata: AdapterMeta { - name: "poppler pdftotext".to_owned(), + name: "poppler".to_owned(), version: 1, // todo: read from ffmpeg -demuxers? matchers: extensions.iter().map(|s| ExtensionMatcher(s)).collect(), diff --git a/src/bin/rga-preproc.rs b/src/bin/rga-preproc.rs index fc1eb56..a14009e 100644 --- a/src/bin/rga-preproc.rs +++ b/src/bin/rga-preproc.rs @@ -1,41 +1,101 @@ +use path_clean::PathClean; use rga::adapters::*; - +use rga::CachingWriter; +use serde::{Deserialize, Serialize}; use std::error::Error; use std::fmt; -use std::path::Path; +use std::io::Write; +use std::path::{Path, PathBuf}; use tree_magic; +const max_db_blob_len: usize = 2000000; + // lazy error fn lerr(inp: impl AsRef) -> Box { return inp.as_ref().into(); } +fn open_db() -> Result>, Box> { + let app_cache = cachedir::CacheDirConfig::new("rga").get_cache_dir()?; + + let db_arc = rkv::Manager::singleton() + .write() + .expect("could not write db manager") + .get_or_create(app_cache.as_path(), |p| { + let mut builder = rkv::Rkv::environment_builder(); + builder + .set_flags(rkv::EnvironmentFlags::NO_SYNC | rkv::EnvironmentFlags::WRITE_MAP) // not durable + .set_map_size(2 * 1024 * 1024 * 1024) + .set_max_dbs(100); + rkv::Rkv::from_env(p, builder) + }) + .expect("could not get/create db"); + Ok(db_arc) +} + fn main() -> Result<(), Box> { + //db. let adapters = init_adapters()?; let filepath = std::env::args() .skip(1) .next() .ok_or(lerr("No filename specified"))?; - println!("fname: {}", filepath); - let path = Path::new(&filepath); + eprintln!("fname: {}", filepath); + let path = PathBuf::from(&filepath); + let serialized_path: Vec = + bincode::serialize(&path.clean()).expect("could not serialize path"); let filename = path.file_name().ok_or(lerr("Empty filename"))?; - let mimetype = tree_magic::from_filepath(path).ok_or(lerr(format!( + /*let mimetype = tree_magic::from_filepath(path).ok_or(lerr(format!( "File {} does not exist", filename.to_string_lossy() )))?; - println!("mimetype: {:?}", mimetype); + println!("mimetype: {:?}", mimetype);*/ let adapter = adapters(FileMeta { - mimetype, + // mimetype, lossy_filename: filename.to_string_lossy().to_string(), }); match adapter { Some(ad) => { - println!("adapter: {}", &ad.metadata().name); - let stdouti = std::io::stdout(); - let mut stdout = stdouti.lock(); - ad.adapt(&filepath, &mut stdout)?; - Ok(()) + let meta = ad.metadata(); + eprintln!("adapter: {}", &meta.name); + let db_name = format!("{}.v{}", meta.name, meta.version); + let db_arc = open_db()?; + let db_env = db_arc.read().unwrap(); + let db = db_env + .open_single(db_name.as_str(), rkv::store::Options::create()) + .map_err(|p| lerr(format!("could not open db store: {:?}", p)))?; + let reader = db_env.read().expect("could not get reader"); + match db + .get(&reader, &serialized_path) + .map_err(|p| lerr(format!("could not read from db: {:?}", p)))? + { + Some(rkv::Value::Blob(cached)) => { + let stdouti = std::io::stdout(); + zstd::stream::copy_decode(cached, stdouti.lock())?; + Ok(()) + } + Some(_) => Err(lerr("Integrity: value not blob")), + None => { + let stdouti = std::io::stdout(); + let mut compbuf = CachingWriter::new(stdouti.lock(), max_db_blob_len, 12)?; + ad.adapt(&filepath, &mut compbuf)?; + let compressed = compbuf.finish()?; + if let Some(cached) = compressed { + eprintln!("compressed len: {}", cached.len()); + + { + let mut writer = db_env.write().map_err(|p| { + lerr(format!("could not open write handle to cache: {:?}", p)) + })?; + db.put(&mut writer, &serialized_path, &rkv::Value::Blob(&cached)) + .map_err(|p| lerr(format!("could not write to cache: {:?}", p)))?; + writer.commit().unwrap(); + } + } + Ok(()) + } + } } None => { eprintln!("no adapter for that file, running cat!"); diff --git a/src/caching_writer.rs b/src/caching_writer.rs new file mode 100644 index 0000000..bb1b74c --- /dev/null +++ b/src/caching_writer.rs @@ -0,0 +1,70 @@ +use std::io::Write; + +enum Sta<'t> { + ToZstd(Vec, zstd::stream::write::Encoder<&'t mut Vec>), +} + +/** + * wrap a writer so that it is passthrough, + * but also the written data is compressed and written into a buffer, unless more than X bytes is written + */ +pub struct CachingWriter { + max_cache_size: usize, + zstd_writer: Option>>, + out: W, +} +impl CachingWriter { + pub fn new( + out: W, + max_cache_size: usize, + compression_level: i32, + ) -> std::io::Result> { + Ok(CachingWriter { + out, + max_cache_size, + zstd_writer: Some(zstd::stream::write::Encoder::new( + Vec::new(), + compression_level, + )?), + }) + } + pub fn finish(self) -> std::io::Result>> { + if let Some(writer) = self.zstd_writer { + let res = writer.finish()?; + if res.len() <= self.max_cache_size { + Ok(Some(res)) + } else { + // drop cache + Ok(None) + } + } else { + Ok(None) + } + } +} +impl Write for CachingWriter { + fn write(&mut self, buf: &[u8]) -> std::io::Result { + match self.zstd_writer.as_mut() { + Some(writer) => { + let wrote = writer.write(buf)?; + let compressed_len = writer.get_ref().len(); + eprintln!("wrote {} to zstd, len now {}", wrote, compressed_len); + if compressed_len > self.max_cache_size { + eprintln!("cache longer than max, dropping"); + //writer.finish(); + self.zstd_writer.take().unwrap().finish()?; + } + self.out.write_all(&buf[0..wrote])?; + return Ok(wrote); + } + None => self.out.write(buf), + } + } + fn flush(&mut self) -> std::io::Result<()> { + eprintln!("flushing"); + if let Some(writer) = self.zstd_writer.as_mut() { + writer.flush()?; + } + self.out.flush() + } +} diff --git a/src/lib.rs b/src/lib.rs index 4e9af61..b489eb7 100644 --- a/src/lib.rs +++ b/src/lib.rs @@ -1 +1,3 @@ pub mod adapters; +mod caching_writer; +pub use caching_writer::CachingWriter;