[fix] work-around File.exist when ending with '/'

kares · kares · commit f4d76f5e00d6 · 2018-06-19T12:52:53.000+02:00
... MRI always returns false when path is a file (dir works) the work-around here is java.io.File's path normalization resolves GH-4403
diff --git a/core/src/main/java/org/jruby/util/JRubyFile.java b/core/src/main/java/org/jruby/util/JRubyFile.java
@@ -52,7 +52,13 @@ public class JRubyFile extends JavaSecuredFile {
     private static final long serialVersionUID = 435364547567567L;
 
     public static JRubyFile create(String cwd, String pathname) {
-        return createNoUnicodeConversion(cwd, pathname);
+        if (pathname == null || pathname.length() == 0 || Ruby.isSecurityRestricted()) {
+            return JRubyFile.DUMMY;
+        }
+        if (pathname.startsWith("file:")) {
+            pathname = pathname.substring(5);
+        }
+        return createNoUnicodeConversion(cwd, pathname, new File(pathname));
     }
 
     public static FileResource createResource(ThreadContext context, String pathname) {
@@ -109,23 +115,13 @@ private static FileResource createResource(Ruby runtime, String cwd, String path
         }
 
         // If any other special resource types fail, count it as a filesystem backed resource.
-        return new RegularFileResource(runtime != null ? runtime.getPosix() : null, create(cwd, pathname));
+        return new RegularFileResource(runtime != null ? runtime.getPosix() : null, create(cwd, pathname), pathname);
     }
 
     public static String normalizeSeps(String path) {
         return Platform.IS_WINDOWS ? path.replace(File.separatorChar, '/') : path;
     }
 
-    private static JRubyFile createNoUnicodeConversion(String cwd, String pathname) {
-        if (pathname == null || pathname.length() == 0 || Ruby.isSecurityRestricted()) {
-            return JRubyFile.DUMMY;
-        }
-        if (pathname.startsWith("file:")) {
-            pathname = pathname.substring(5);
-        }
-        return createNoUnicodeConversion(cwd, pathname, new File(pathname));
-    }
-
     private static JRubyFile createNoUnicodeConversion(String cwd, String pathname, File path) {
         // File and company do not seem to recognize bare \ and / on Windows as absolute.  Cheat!
         if (path.isAbsolute() || Platform.IS_WINDOWS && (pathname.startsWith("/") || pathname.startsWith("\\"))) {
@@ -184,6 +180,10 @@ public String getPath() {
         return normalizeSeps(super.getPath());
     }
 
+    final String getPathDefault() {
+        return super.getPath();
+    }
+
     @Override
     public String toString() {
         return normalizeSeps(super.toString());
diff --git a/core/src/main/java/org/jruby/util/RegularFileResource.java b/core/src/main/java/org/jruby/util/RegularFileResource.java
@@ -29,16 +29,20 @@
  * Represents a "regular" file, backed by regular file system.
  */
 class RegularFileResource implements FileResource {
+
     private final JRubyFile file;
+    private final String filePath; // original (non-normalized) file-path
     private final POSIX posix;
 
-    RegularFileResource(POSIX posix, JRubyFile file) {
+    RegularFileResource(POSIX posix, JRubyFile file, String filePath) {
         this.file = file;
+        this.filePath = filePath;
         this.posix = posix;
     }
 
     protected RegularFileResource(POSIX posix, String filename) {
         this.file = new JRubyFile(filename);
+        this.filePath = filename;
         this.posix = posix;
     }
 
@@ -91,7 +95,17 @@ private BasicFileAttributes readAttributes() throws IOException {
 
     @Override
     public boolean exists() {
-        return file.exists();
+        if (file.exists()) {
+            String path = filePath;
+            if (path.length() > 1 && path.charAt(path.length() - 1) == '/') {
+                path = file.getPathDefault();
+                if (path.length() > 0 && path.charAt(path.length() - 1) != '/' && !isDirectory()) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        return false;
     }
 
     @Override
@@ -123,11 +137,7 @@ public boolean isSymLink() {
             BasicFileAttributes attrs = Files.readAttributes(file.toPath(), BasicFileAttributes.class, LinkOption.NOFOLLOW_LINKS);
 
             return attrs != null && attrs.isSymbolicLink();
-        } catch (SecurityException se) {
-            return false;
-        } catch (IOException ie) {
-            return false;
-        } catch (UnsupportedOperationException uoe) {
+        } catch (SecurityException|IOException|UnsupportedOperationException ex) {
             return false;
         }
     }
diff --git a/test/jruby/test_file.rb b/test/jruby/test_file.rb
@@ -1406,4 +1406,13 @@ def test_realpath_with_uri_paths
       assert_equal(result.end_with?(postfix), true, result + " ends with "  + postfix)
     end
   end
+
+  def test_file_exists_ending_with_slash
+    assert File.exist?(__FILE__)
+    assert_false File.exist?(__FILE__ + '/')
+
+    assert File.exist?(File.dirname(__FILE__))
+    assert File.exist?(File.dirname(__FILE__) + '/')
+  end
+
 end
