Merge pull request #77 from ConfusedVorlon/find_hidden_modifier

Find hidden modifier

README.md

@@ -227,7 +227,7 @@ We provide `find()` for recursive listing:
 
 ```swift
 for path in Path.home.find() {
-    // descends all directories, and includes hidden files
+    // descends all directories, and includes hidden files by default
     // so it behaves the same as the terminal command `find`
 }
 ```
@@ -235,7 +235,7 @@ for path in Path.home.find() {
 It is configurable:
 
 ```swift
-for path in Path.home.find().depth(max: 1).extension("swift").type(.file) {
+for path in Path.home.find().depth(max: 1).extension("swift").type(.file).hidden(false) {
     //…
 }
 ```

Sources/Path+ls.swift

@@ -31,6 +31,9 @@ public extension Path {
 
         /// The file extensions find operations will return. Files *and* directories unless you filter for `kinds`.
         private(set) public var extensions: Set<String>?
+        
+        /// Whether to return hidden files
+        public var hidden:Bool = true
     }
 }
 
@@ -50,8 +53,12 @@ extension Path.Finder: Sequence, IteratorProtocol {
             if enumerator.level < depth.lowerBound {
                 continue
             }
-          #endif
           
+            if !hidden, path.basename().hasPrefix(".") {
+                enumerator.skipDescendants()
+                continue
+            }
+          #endif
             if let type = path.type, !types.contains(type) { continue }
             if let exts = extensions, !exts.contains(path.extension) { continue }
             return path
@@ -115,6 +122,15 @@ public extension Path.Finder {
         return self
     }
     
+    /// Whether to skip hidden files and folders.
+    func hidden(_ hidden: Bool) -> Path.Finder {
+        #if os(Linux) && !swift(>=5.0)
+          fputs("warning: hidden not implemented for Swift < 5\n", stderr)
+        #endif
+        self.hidden = hidden
+        return self
+    }
+
     /// The return type for `Path.Finder`
     enum ControlFlow {
         /// Stop enumerating this directory, return to the parent.

Tests/PathTests/PathTests+ls().swift

@@ -136,6 +136,28 @@ extension PathTests {
         }
     }
 
+    func testFindHidden() throws {
+        try Path.mktemp { tmpdir in
+            let dotFoo = try tmpdir.join(".foo.txt").touch()
+            let tmpDotA = try tmpdir.join(".a").mkdir()
+            let tmpDotAFoo = try tmpdir.join(".a").join("foo.txt").touch()
+            let tmpB = try tmpdir.b.mkdir()
+            let tmpBFoo = try tmpdir.b.join("foo.txt").touch()
+
+            XCTAssertEqual(
+                Set(tmpdir.find().hidden(true)),
+                Set([dotFoo,tmpDotA,tmpDotAFoo,tmpB,tmpBFoo]),
+                relativeTo: tmpdir)
+            
+            #if !os(Linux) || swift(>=5)
+            XCTAssertEqual(
+                Set(tmpdir.find().hidden(false)),
+                Set([tmpB,tmpBFoo]),
+                relativeTo: tmpdir)
+            #endif
+        }
+    }
+    
     func testFindExtension() throws {
         try Path.mktemp { tmpdir in
             try tmpdir.join("foo.json").touch()

Tests/PathTests/XCTestManifests.swift

@@ -29,6 +29,7 @@ extension PathTests {
         ("testFindDepthRange", testFindDepthRange),
         ("testFindExecute", testFindExecute),
         ("testFindExtension", testFindExtension),
+        ("testFindHidden", testFindHidden),
         ("testFindMaxDepth1", testFindMaxDepth1),
         ("testFindMaxDepth2", testFindMaxDepth2),
         ("testFindMinDepth", testFindMinDepth),

Tests/PathTests/etc.swift

@@ -19,7 +19,7 @@ private func logic<P: Pathish>(_ set1: Set<Path>, _ set2: Set<Path>, relativeTo:
     if set1 != set2 {
         let cvt: (Path) -> String = { $0.relative(to: relativeTo) }
         let out1 = set1.map(cvt).sorted()
-        let out2 = set1.map(cvt).sorted()
+        let out2 = set2.map(cvt).sorted()
         fail("Set(\(out1)) is not equal to Set(\(out2))")
     }
 }