tikhomirov@15: /*
tikhomirov@15:  * Copyright (c) 2010 Artem Tikhomirov 
tikhomirov@15:  */
tikhomirov@15: package com.tmate.hgkit.ll;
tikhomirov@15: 
tikhomirov@15: import java.io.BufferedReader;
tikhomirov@15: import java.io.File;
tikhomirov@15: import java.io.FileReader;
tikhomirov@15: import java.io.IOException;
tikhomirov@15: import java.util.Collections;
tikhomirov@15: import java.util.Set;
tikhomirov@15: import java.util.TreeSet;
tikhomirov@15: 
tikhomirov@15: /**
tikhomirov@15:  *
tikhomirov@15:  * @author artem
tikhomirov@15:  */
tikhomirov@15: public class HgIgnore {
tikhomirov@15: 
tikhomirov@15: 	private final LocalHgRepo repo;
tikhomirov@15: 	private Set<String> entries;
tikhomirov@15: 
tikhomirov@15: 	public HgIgnore(LocalHgRepo localRepo) {
tikhomirov@15: 		this.repo = localRepo;
tikhomirov@15: 	}
tikhomirov@15: 
tikhomirov@15: 	private void read() {
tikhomirov@15: 		entries = Collections.emptySet();
tikhomirov@15: 		File hgignoreFile = new File(repo.getRepositoryRoot().getParentFile(), ".hgignore");
tikhomirov@15: 		if (!hgignoreFile.exists()) {
tikhomirov@15: 			return;
tikhomirov@15: 		}
tikhomirov@15: 		entries = new TreeSet<String>();
tikhomirov@15: 		try {
tikhomirov@15: 			BufferedReader fr = new BufferedReader(new FileReader(hgignoreFile));
tikhomirov@15: 			String line;
tikhomirov@15: 			while ((line = fr.readLine()) != null) {
tikhomirov@15: 				// FIXME need to detect syntax:glob and other parameters
tikhomirov@15: 				entries.add(line.trim()); // shall I account for local paths in the file (i.e. back-slashed on windows)?
tikhomirov@15: 			}
tikhomirov@15: 		} catch (IOException ex) {
tikhomirov@15: 			ex.printStackTrace(); // log warn
tikhomirov@15: 		}
tikhomirov@15: 	}
tikhomirov@15: 
tikhomirov@15: 	public void reset() {
tikhomirov@15: 		// FIXME does anyone really need to clear HgIgnore? Perhaps, repo may return new instance each time,
tikhomirov@15: 		// which is used throughout invocation and then discarded?
tikhomirov@15: 		entries = null;
tikhomirov@15: 	}
tikhomirov@15: 
tikhomirov@15: 	public boolean isIgnored(String path) {
tikhomirov@15: 		if (entries == null) {
tikhomirov@15: 			read();
tikhomirov@15: 		}
tikhomirov@15: 		if (entries.contains(path)) {
tikhomirov@15: 			// easy part
tikhomirov@15: 			return true;
tikhomirov@15: 		}
tikhomirov@15: 		// substrings are memory-friendly 
tikhomirov@15: 		int x = 0, i = path.indexOf('/', 0);
tikhomirov@15: 		while (i != -1) {
tikhomirov@15: 			if (entries.contains(path.substring(x, i))) {
tikhomirov@15: 				return true;
tikhomirov@15: 			}
tikhomirov@15: 			// try one with ending slash
tikhomirov@15: 			if (entries.contains(path.substring(x, i+1))) { // even if i is last index, i+1 is safe here
tikhomirov@15: 				return true;
tikhomirov@15: 			}
tikhomirov@15: 			x = i+1;
tikhomirov@15: 			i = path.indexOf('/', x);
tikhomirov@15: 		}
tikhomirov@15: 		return false;
tikhomirov@15: 	}
tikhomirov@15: }