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use std::collections::HashMap; use std::collections::BTreeMap; use git::Commit; /// A convenience type for a map of components to commits pub type ComponentMap = BTreeMap<String, Vec<Commit>>; /// A struct which holds sections to and components->commits map pub struct SectionMap { pub sections: HashMap<String, ComponentMap> } impl SectionMap { /// Creates a section map from a vector of commits, which we can then iterate through and write /// /// # Example /// /// ```no_run /// # use std::fs::File; /// # use std::io::Read; /// # use std::path::Path; /// # use std::collections::BTreeMap; /// # use clog::{Clog, LogWriter, SectionMap}; /// let clog = Clog::new().unwrap_or_else(|e| { /// println!("Error initializing: {}", e); /// std::process::exit(1); /// }); /// /// // Get the commits we're interested in and create the section map... /// let sm = SectionMap::from_commits(clog.get_commits()); /// /// // Open and prepend, or create the changelog file... /// let mut contents = String::new(); /// File::open(&Path::new(&clog.changelog[..])).map(|mut f| f.read_to_string(&mut contents).ok()).ok(); /// let mut file = File::create(&Path::new(&clog.changelog[..])).ok().unwrap(); /// /// // Write the header... /// let mut writer = LogWriter::new(&mut file, &clog); /// writer.write_header().ok().expect("failed to write header"); /// /// // Write the sections /// for (sec, secmap) in sm.sections { /// writer.write_section(&sec[..], &secmap.iter() /// .collect::<BTreeMap<_,_>>()) /// .ok() /// .expect(&format!("failed to write {}", sec)[..]); /// } /// writer.write(&contents[..]).ok().expect("failed to write contents"); /// ``` pub fn from_commits(commits: Vec<Commit>) -> SectionMap { let mut sm = SectionMap { sections: HashMap::new() }; commits.into_iter().map(|entry| { let comp_map = sm.sections.entry(entry.commit_type.clone()).or_insert(BTreeMap::new()); let sec_map = comp_map.entry(entry.component.clone()).or_insert(vec![]); sec_map.push(entry); }).collect::<Vec<_>>(); sm } }