/// Validates that paths-based capabilities (service, directory, protocol)
/// are different and not prefixes of each other.
Validates that paths-based capabilities (service, directory, protocol)
are different and not prefixes of each other.
Validates that paths - based capabilities ( service directory protocol ) are different and not prefixes of each other .
fn validate_use_paths(&mut self, uses: &[fsys::UseDecl]) {
        #[derive(Debug, PartialEq, Clone, Copy)]
        struct PathCapability<'a> {
            decl: &'a str,
            dir: &'a Path,
            use_: &'a fsys::UseDecl,
        }
        let mut used_paths = HashMap::new();
        for use_ in uses.iter() {
            match use_ {
                fsys::UseDecl::Service(fsys::UseServiceDecl {
                    target_path: Some(path), ..
                })
                | fsys::UseDecl::Protocol(fsys::UseProtocolDecl {
                    target_path: Some(path), ..
                })
                | fsys::UseDecl::Directory(fsys::UseDirectoryDecl {
                    target_path: Some(path),
                    ..
                }) => {
                    let capability = match use_ {
                        fsys::UseDecl::Service(_) => {
                            let dir = match Path::new(path).parent() {
                                Some(p) => p,
                                None => continue, // Invalid path, validated elsewhere
                            };
                            PathCapability { decl: "UseServiceDecl", dir, use_ }
                        }
                        fsys::UseDecl::Protocol(_) => {
                            let dir = match Path::new(path).parent() {
                                Some(p) => p,
                                None => continue, // Invalid path, validated elsewhere
                            };
                            PathCapability { decl: "UseProtocolDecl", dir, use_ }
                        }
                        fsys::UseDecl::Directory(_) => {
                            PathCapability { decl: "UseDirectoryDecl", dir: Path::new(path), use_ }
                        }
                        _ => unreachable!(),
                    };
                    if used_paths.insert(path, capability).is_some() {
                        // Disallow multiple capabilities for the same path.
                        self.errors.push(Error::duplicate_field(capability.decl, "path", path));
                    }
                }
                _ => {}
            }
        }
        for ((&path_a, capability_a), (&path_b, capability_b)) in
            used_paths.iter().tuple_combinations()
        {
            if match (capability_a.use_, capability_b.use_) {
                // Directories can't be the same or partially overlap.
                (fsys::UseDecl::Directory(_), fsys::UseDecl::Directory(_)) => {
                    capability_b.dir == capability_a.dir
                        || capability_b.dir.starts_with(capability_a.dir)
                        || capability_a.dir.starts_with(capability_b.dir)
                }
                // Protocols and Services can't overlap with Directories.
                (_, fsys::UseDecl::Directory(_)) | (fsys::UseDecl::Directory(_), _) => {
                    capability_b.dir == capability_a.dir
                        || capability_b.dir.starts_with(capability_a.dir)
                        || capability_a.dir.starts_with(capability_b.dir)
                }
                // Protocols and Services containing directories may be same, but
                // partial overlap is disallowed.
                (_, _) => {
                    capability_b.dir != capability_a.dir
                        && (capability_b.dir.starts_with(capability_a.dir)
                            || capability_a.dir.starts_with(capability_b.dir))
                }
            } {
                self.errors.push(Error::invalid_path_overlap(
                    capability_a.decl,
                    path_a,
                    capability_b.decl,
                    path_b,
                ));
            }
        }
    }
fn validate_use_paths ( & mut self , uses : & [ fsys :: UseDecl ] ) { # [ derive ( Debug PartialEq Clone Copy ) ] struct PathCapability < ' a > { decl : & ' a str , dir : & ' a Path , use_ : & ' a fsys :: UseDecl , } let mut used_paths = HashMap :: new ( ) ; for use_ in uses . iter ( ) { match use_ { fsys :: UseDecl :: Service ( fsys :: UseServiceDecl { target_path : Some ( path ) , .. } ) | fsys :: UseDecl :: Protocol ( fsys :: UseProtocolDecl { target_path : Some ( path ) , .. } ) | fsys :: UseDecl :: Directory ( fsys :: UseDirectoryDecl { target_path : Some ( path ) , .. } ) => { let capability = match use_ { fsys :: UseDecl :: Service ( _ ) => { let dir = match Path :: new ( path ) . parent ( ) { Some ( p ) => p , None => continue , // Invalid path, validated elsewhere } ; PathCapability { decl : " " , dir , use_ } } fsys :: UseDecl :: Protocol ( _ ) => { let dir = match Path :: new ( path ) . parent ( ) { Some ( p ) => p , None => continue , // Invalid path, validated elsewhere } ; PathCapability { decl : " " , dir , use_ } } fsys :: UseDecl :: Directory ( _ ) => { PathCapability { decl : " " , dir : Path :: new ( path ) , use_ } } _ => unreachable ! ( ) , } ; if used_paths . insert ( path , capability ) . is_some ( ) { // Disallow multiple capabilities for the same path. self . errors . push ( Error :: duplicate_field ( capability . decl , " " , path ) ) ; } } _ => { } } } for ( ( & path_a , capability_a ) , ( & path_b , capability_b ) ) in used_paths . iter ( ) . tuple_combinations ( ) { if match ( capability_a . use_ , capability_b . use_ ) { // Directories can't be the same or partially overlap. ( fsys :: UseDecl :: Directory ( _ ) , fsys :: UseDecl :: Directory ( _ ) ) => { capability_b . dir == capability_a . dir || capability_b . dir . starts_with ( capability_a . dir ) || capability_a . dir . starts_with ( capability_b . dir ) } // Protocols and Services can't overlap with Directories. ( _ , fsys :: UseDecl :: Directory ( _ ) ) | ( fsys :: UseDecl :: Directory ( _ ) , _ ) => { capability_b . dir == capability_a . dir || capability_b . dir . starts_with ( capability_a . dir ) || capability_a . dir . starts_with ( capability_b . dir ) } // Protocols and Services containing directories may be same, but // partial overlap is disallowed. ( _ , _ ) => { capability_b . dir != capability_a . dir && ( capability_b . dir . starts_with ( capability_a . dir ) || capability_a . dir . starts_with ( capability_b . dir ) ) } } { self . errors . push ( Error :: invalid_path_overlap ( capability_a . decl , path_a , capability_b . decl , path_b , ) ) ; } } }
Validates that paths-based capabilities (service, directory, protocol)
are different and not prefixes of each other.
Validates that paths - based capabilities ( service directory protocol ) are different and not prefixes of each other .
&mut self
uses
&[fsys::UseDecl]