Implement ignore rules.

libbsv/Cargo.toml

@@ -7,7 +7,7 @@ license = "AGPL-3.0-or-later"
 
 [dependencies]
 toml = "0.5.8"
-camino = { version = "1.0.7" }
-globset = "0.4.9"
+camino = "1.0.7"
+regex = "1.6.0"
 cas-core = { path = "../cas-core" }
 cas-simple = { path = "../cas-simple" }

libbsv/src/ignore.rs

@@ -15,12 +15,12 @@
 
 
 use camino::{Utf8Path, Utf8PathBuf};
-use globset::GlobSet;
+use regex::RegexSet;
 
 use cas_core::{err, Error, Result};
 
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub enum Action {
     Ignore,
     Accept,
@@ -29,7 +29,7 @@ pub enum Action {
 
 #[derive(Debug)]
 pub struct IgnoreRules {
-    patterns: GlobSet,
+    patterns: RegexSet,
     actions: Vec<Action>,
 }
 
@@ -37,21 +37,101 @@ pub struct IgnoreRules {
 impl IgnoreRules {
     pub fn new() -> Self {
         Self {
-            patterns: GlobSet::default(),
+            patterns: RegexSet::new(&[] as &[&str]).unwrap(),
             actions: vec![],
         }
     }
 
-    pub fn from_vec(vec: Vec<(Action, Utf8PathBuf)>) -> Result<Self> {
-        err!("Todo")
+    pub fn from_source<P: AsRef<Utf8Path>>(source: &str, root: P) -> Result<Self> {
+        assert!(root.as_ref().is_absolute());
+
+        let separator = if std::path::MAIN_SEPARATOR == '/' {
+            "/"
+        }
+        else {
+            assert_eq!(std::path::MAIN_SEPARATOR, '\\');
+            "\\\\"
+        };
+
+        let mut patterns = Vec::<String>::default();
+        let mut actions = Vec::<Action>::default();
+
+        for line in source.lines() {
+            let rule = line.trim();
+            let mut rule_it = rule.chars().peekable();
+            if rule_it.peek().is_none() || rule_it.peek() == Some(&'#') {
+                continue;
+            }
+
+            if rule_it.peek() == Some(&'!') {
+                rule_it.next();
+                actions.push(Action::Accept);
+            }
+            else {
+                actions.push(Action::Ignore);
+            }
+
+            let mut pat = String::new();
+            let mut last_is_sep = false;
+
+            if rule_it.peek() == Some(&'/') {
+                pat.push_str("^");
+                pat.push_str(&regex::escape(root.as_ref().as_str()));
+            }
+
+            while let Some(c) = rule_it.next() {
+                if c == '/' {
+                    pat.push_str(separator);
+                    last_is_sep = true;
+                    continue;
+                }
+                else if c == '*' {
+                    if rule_it.peek() == Some(&'*') {
+                        rule_it.next();
+                        if !last_is_sep || (!rule_it.peek().is_none() && rule_it.peek() != Some(&'/')) {
+                            return err!("** pattern can only be used as a whole path segment");
+                        }
+                        pat.push_str(".*");
+                    }
+                    else {
+                        pat.push_str("[^/]*");
+                    }
+                }
+                else if c == '\\' {
+                    let c2 = rule_it.next().ok_or(Error::unknown("invalid \\ at end of rule"))?;
+                    let mut buf = [0u8; 4];
+                    pat.push_str(&regex::escape(c2.encode_utf8(&mut buf)));
+                }
+                else {
+                    let mut buf = [0u8; 4];
+                    pat.push_str(&regex::escape(c.encode_utf8(&mut buf)));
+                }
+                last_is_sep = false;
+            }
+
+            if last_is_sep {
+                pat.pop();
+            }
+            pat.push_str("(/.*)?$");
+
+            dbg!(&pat);
+            patterns.push(pat);
+        }
+
+        Ok(Self {
+            patterns: RegexSet::new(patterns)
+                .or_else(|err| err!("failed to compile ignore rules: {err}"))?,
+            actions: actions,
+        })
     }
 
-    pub fn from_ignore_file(ignore_file: &str, root: &Utf8Path) -> Result<Self> {
-        err!("Todo")
-    }
-
-    pub fn is_ignored<P: AsRef<Utf8PathBuf>>(&self, path: P) -> bool {
-
+    pub fn action_for<P: AsRef<Utf8Path>>(&self, path: P) -> Action {
+        assert!(path.as_ref().is_absolute());
+        let index = self.patterns.matches(path.as_ref().as_str())
+            .iter()
+            .next()
+            .unwrap_or(self.actions.len());
+        *self.actions.get(index).unwrap_or(&Action::Accept)
     }
 }
 
@@ -63,5 +143,21 @@ mod tests {
 
     #[test]
     fn test_path_map() {
+        let root = Utf8PathBuf::from("/foo.dir/bar");
+        let patterns = "!hello/world\nhello\n/world/\n\\!\\*\n*.bak";
+        let ignore = IgnoreRules::from_source(patterns, root).unwrap();
+
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/hello/aoeu")), Action::Ignore);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/hello_world/aoeu")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/world/aoeu")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/hello/world/aoeu")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/world/aoeu")), Action::Ignore);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/world")), Action::Ignore);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/fooXdir/bar/world")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/!*/aoeu")), Action::Ignore);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/file.bak")), Action::Ignore);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test/fileXbak")), Action::Accept);
+        assert_eq!(ignore.action_for(Utf8PathBuf::from("/foo.dir/bar/test.bak/file")), Action::Ignore);
     }
 }

libbsv/src/lib.rs

@@ -16,7 +16,7 @@
 
 extern crate toml;
 extern crate camino;
-extern crate globset;
+extern crate regex;
 
 extern crate cas_core;
 
@@ -26,7 +26,7 @@ mod tree_item;
 // mod tree_walker;
 // mod config;
 mod path_map;
-// mod ignore;
+mod ignore;
 mod repository;