Add docs for distribution and metadata mods

Author: messense

src/distribution.rs

@@ -6,10 +6,14 @@ use zip::ZipArchive;
 
 use crate::{Error, Metadata};
 
+/// Python package distribution type
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub enum DistributionType {
+    /// Source distribution
     SDist,
+    /// Binary distribution egg format
     Egg,
+    /// Binary distribution wheel format
     Wheel,
 }
 
@@ -19,6 +23,7 @@ enum SDistType {
     TarGz,
 }
 
+/// Python package distribution
 #[derive(Debug, Clone)]
 pub struct Distribution {
     dist_type: DistributionType,

src/metadata.rs

@@ -3,6 +3,7 @@ use std::str::FromStr;
 use crate::Error;
 use mailparse::MailHeaderMap;
 
+/// Python package metadata
 #[derive(Debug, Clone, Default, PartialEq)]
 pub struct Metadata {
     /// Version of the file format; legal values are “1.0”, “1.1”, “1.2”, “2.1” and “2.2”.