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Give IgnorePatterns a better interface
This commit gives IgnorePatterns a bunch of constructor methods that mean its option-parsing sister file doesn’t need to know that it’s a vec of glob patterns inside: it can work with anything that iterates over strings. Now, the options module doesn’t need to know about the glob crate.
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@ -1,4 +1,5 @@
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use std::cmp::Ordering;
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use std::iter::FromIterator;
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use std::os::unix::fs::MetadataExt;
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use glob;
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@ -209,12 +210,45 @@ pub enum SortCase {
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}
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/// The **ignore patterns** are a list of globs that are tested against
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/// each filename, and if any of them match, that file isn’t displayed.
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/// This lets a user hide, say, text files by ignoring `*.txt`.
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#[derive(PartialEq, Default, Debug, Clone)]
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pub struct IgnorePatterns {
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pub patterns: Vec<glob::Pattern>,
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patterns: Vec<glob::Pattern>,
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}
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impl FromIterator<glob::Pattern> for IgnorePatterns {
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fn from_iter<I: IntoIterator<Item = glob::Pattern>>(iter: I) -> Self {
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IgnorePatterns { patterns: iter.into_iter().collect() }
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}
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}
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impl IgnorePatterns {
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/// Create a new list from the input glob strings, turning the inputs that
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/// are valid glob patterns into an IgnorePatterns. The inputs that don’t
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/// parse correctly are returned separately.
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pub fn parse_from_iter<'a, I: IntoIterator<Item = &'a str>>(iter: I) -> (Self, Vec<glob::PatternError>) {
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let mut patterns = Vec::new();
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let mut errors = Vec::new();
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for input in iter {
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match glob::Pattern::new(input) {
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Ok(pat) => patterns.push(pat),
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Err(e) => errors.push(e),
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}
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}
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(IgnorePatterns { patterns }, errors)
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}
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/// Create a new empty list that matches nothing.
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pub fn empty() -> IgnorePatterns {
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IgnorePatterns { patterns: Vec::new() }
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}
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/// Test whether the given file should be hidden from the results.
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fn is_ignored(&self, file: &File) -> bool {
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self.patterns.iter().any(|p| p.matches(&file.name))
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}
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@ -1,5 +1,3 @@
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use glob;
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use fs::DotFilter;
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use fs::filter::{FileFilter, SortField, SortCase, IgnorePatterns};
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@ -102,15 +100,22 @@ impl IgnorePatterns {
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/// Determines the set of file filter options to use, based on the user’s
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/// command-line arguments.
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pub fn deduce(matches: &MatchedFlags) -> Result<IgnorePatterns, Misfire> {
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let patterns = match matches.get(&flags::IGNORE_GLOB) {
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None => Ok(Vec::new()),
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Some(is) => is.to_string_lossy().split('|').map(|a| glob::Pattern::new(a)).collect(),
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}?;
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// TODO: is to_string_lossy really the best way to handle
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// invalid UTF-8 there?
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let inputs = match matches.get(&flags::IGNORE_GLOB) {
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None => return Ok(IgnorePatterns::empty()),
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Some(is) => is,
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};
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Ok(IgnorePatterns { patterns })
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let (patterns, mut errors) = IgnorePatterns::parse_from_iter(inputs.to_string_lossy().split('|'));
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// It can actually return more than one glob error,
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// but we only use one.
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if let Some(error) = errors.pop() {
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return Err(error.into())
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}
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else {
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Ok(patterns)
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}
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}
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}
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@ -185,6 +190,7 @@ mod test {
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mod ignore_patternses {
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use super::*;
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use std::iter::FromIterator;
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use glob;
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fn pat(string: &'static str) -> glob::Pattern {
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@ -192,9 +198,9 @@ mod test {
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}
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// Various numbers of globs
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test!(none: IgnorePatterns <- [] => Ok(IgnorePatterns { patterns: vec![] }));
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test!(one: IgnorePatterns <- ["--ignore-glob", "*.ogg"] => Ok(IgnorePatterns { patterns: vec![ pat("*.ogg") ] }));
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test!(two: IgnorePatterns <- ["--ignore-glob=*.ogg|*.MP3"] => Ok(IgnorePatterns { patterns: vec![ pat("*.ogg"), pat("*.MP3") ] }));
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test!(loads: IgnorePatterns <- ["-I*|?|.|*"] => Ok(IgnorePatterns { patterns: vec![ pat("*"), pat("?"), pat("."), pat("*") ] }));
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test!(none: IgnorePatterns <- [] => Ok(IgnorePatterns::empty()));
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test!(one: IgnorePatterns <- ["--ignore-glob", "*.ogg"] => Ok(IgnorePatterns::from_iter(vec![ pat("*.ogg") ])));
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test!(two: IgnorePatterns <- ["--ignore-glob=*.ogg|*.MP3"] => Ok(IgnorePatterns::from_iter(vec![ pat("*.ogg"), pat("*.MP3") ])));
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test!(loads: IgnorePatterns <- ["-I*|?|.|*"] => Ok(IgnorePatterns::from_iter(vec![ pat("*"), pat("?"), pat("."), pat("*") ])));
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}
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}
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