SD Filesystem compatible with 8266 File, using latest SdFat

.gitmodules

@@ -7,3 +7,6 @@
 [submodule "libraries/SoftwareSerial"]
 	path = libraries/SoftwareSerial
 	url = https://github.com/plerup/espsoftwareserial.git
+[submodule "libraries/ESP8266SdFat"]
+	path = libraries/ESP8266SdFat
+	url = https://github.com/earlephilhower/ESP8266SdFat.git

cores/esp8266/FS.cpp

@@ -121,6 +121,44 @@ const char* File::name() const {
     return _p->name();
 }
 
+const char* File::fullName() const {
+    if (!_p)
+        return nullptr;
+
+    return _p->fullName();
+}
+
+bool File::isFile() const {
+    if (!_p)
+        return false;
+
+    return _p->isFile();
+}
+
+bool File::isDirectory() const {
+    if (!_p)
+        return false;
+
+    return _p->isDirectory();
+}
+
+void File::rewindDirectory() {
+    if (!_fakeDir) {
+        _fakeDir = std::make_shared<Dir>(_baseFS->openDir(fullName()));
+    } else {
+        _fakeDir->rewind();
+   }
+}
+
+File File::openNextFile() {
+    if (!_fakeDir) {
+        _fakeDir = std::make_shared<Dir>(_baseFS->openDir(fullName()));
+    }
+    _fakeDir->next();
+    return _fakeDir->openFile("r");
+}
+
+
 File Dir::openFile(const char* mode) {
     if (!_impl) {
         return File();
@@ -133,7 +171,7 @@ File Dir::openFile(const char* mode) {
         return File();
     }
 
-    return File(_impl->openFile(om, am));
+    return File(_impl->openFile(om, am), _baseFS);
 }
 
 String Dir::fileName() {
@@ -152,6 +190,20 @@ size_t Dir::fileSize() {
     return _impl->fileSize();
 }
 
+bool Dir::isFile() const {
+    if (!_impl)
+        return false;
+
+    return _impl->isFile();
+}
+
+bool Dir::isDirectory() const {
+    if (!_impl)
+        return false;
+
+    return _impl->isDirectory();
+}
+
 bool Dir::next() {
     if (!_impl) {
         return false;
@@ -160,11 +212,19 @@ bool Dir::next() {
     return _impl->next();
 }
 
-bool FS::begin() {
+bool Dir::rewind() {
     if (!_impl) {
         return false;
     }
-    return _impl->begin();
+
+    return _impl->rewind();
+}
+
+bool FS::begin(const FSConfig *cfg) {
+    if (!_impl) {
+        return false;
+    }
+    return _impl->begin(cfg);
 }
 
 void FS::end() {
@@ -202,8 +262,7 @@ File FS::open(const char* path, const char* mode) {
         DEBUGV("FS::open: invalid mode `%s`\r\n", mode);
         return File();
     }
-
-    return File(_impl->open(path, om, am));
+    return File(_impl->open(path, om, am), this);
 }
 
 bool FS::exists(const char* path) {
@@ -221,7 +280,8 @@ Dir FS::openDir(const char* path) {
     if (!_impl) {
         return Dir();
     }
-    return Dir(_impl->openDir(path));
+    DirImplPtr p = _impl->openDir(path);
+    return Dir(p, this);
 }
 
 Dir FS::openDir(const String& path) {
@@ -239,6 +299,28 @@ bool FS::remove(const String& path) {
     return remove(path.c_str());
 }
 
+bool FS::rmdir(const char* path) {
+    if (!_impl) {
+        return false;
+    }
+    return _impl->rmdir(path);
+}
+
+bool FS::rmdir(const String& path) {
+    return rmdir(path.c_str());
+}
+
+bool FS::mkdir(const char* path) {
+    if (!_impl) {
+        return false;
+    }
+    return _impl->mkdir(path);
+}
+
+bool FS::mkdir(const String& path) {
+    return mkdir(path.c_str());
+}
+
 bool FS::rename(const char* pathFrom, const char* pathTo) {
     if (!_impl) {
         return false;
@@ -251,6 +333,7 @@ bool FS::rename(const String& pathFrom, const String& pathTo) {
 }
 
 
+
 static bool sflags(const char* mode, OpenMode& om, AccessMode& am) {
     switch (mode[0]) {
         case 'r':

cores/esp8266/FS.h

@@ -28,6 +28,7 @@ namespace fs {
 
 class File;
 class Dir;
+class FS;
 
 class FileImpl;
 typedef std::shared_ptr<FileImpl> FileImplPtr;
@@ -48,7 +49,7 @@ enum SeekMode {
 class File : public Stream
 {
 public:
-    File(FileImplPtr p = FileImplPtr()) : _p(p) {}
+    File(FileImplPtr p = FileImplPtr(), FS *baseFS = nullptr) : _p(p), _fakeDir(nullptr), _baseFS(baseFS) { }
 
     // Print methods:
     size_t write(uint8_t) override;
@@ -72,22 +73,41 @@ class File : public Stream
     void close();
     operator bool() const;
     const char* name() const;
+    const char* fullName() const; // Includes path
+
+    bool isFile() const;
+    bool isDirectory() const;
+
+    // Arduino "class SD" methods for compatibility
+    size_t write(const char *str) { return write((const uint8_t*)str, strlen(str)); }
+    void rewindDirectory();
+    File openNextFile();
 
 protected:
     FileImplPtr _p;
+
+    // Arduino SD class emulation
+    std::shared_ptr<Dir> _fakeDir;
+    FS                  *_baseFS;
 };
 
 class Dir {
 public:
-    Dir(DirImplPtr impl = DirImplPtr()): _impl(impl) { }
+    Dir(DirImplPtr impl = DirImplPtr(), FS *baseFS = nullptr): _impl(impl), _baseFS(baseFS) { }
 
     File openFile(const char* mode);
+
     String fileName();
     size_t fileSize();
+    bool isFile() const;
+    bool isDirectory() const;
+
     bool next();
+    bool rewind();
 
 protected:
     DirImplPtr _impl;
+    FS       *_baseFS;
 };
 
 struct FSInfo {
@@ -99,12 +119,22 @@ struct FSInfo {
     size_t maxPathLength;
 };
 
+class FSConfig
+{
+public:
+    FSConfig(bool autoFormat = true) {
+        _autoFormat = autoFormat;
+    }
+
+    bool _autoFormat;
+};
+
 class FS
 {
 public:
     FS(FSImplPtr impl) : _impl(impl) { }
 
-    bool begin();
+    bool begin(const FSConfig *cfg = nullptr);
     void end();
 
     bool format();
@@ -125,6 +155,12 @@ class FS
     bool rename(const char* pathFrom, const char* pathTo);
     bool rename(const String& pathFrom, const String& pathTo);
 
+    bool mkdir(const char* path);
+    bool mkdir(const String& path);
+
+    bool rmdir(const char* path);
+    bool rmdir(const String& path);
+
 protected:
     FSImplPtr _impl;
 };
@@ -140,6 +176,7 @@ using fs::SeekSet;
 using fs::SeekCur;
 using fs::SeekEnd;
 using fs::FSInfo;
+using fs::FSConfig;
 #endif //FS_NO_GLOBALS
 
 #if !defined(NO_GLOBAL_INSTANCES) && !defined(NO_GLOBAL_SPIFFS)

cores/esp8266/FSImpl.h

@@ -36,6 +36,9 @@ class FileImpl {
     virtual size_t size() const = 0;
     virtual void close() = 0;
     virtual const char* name() const = 0;
+    virtual const char* fullName() const = 0;
+    virtual bool isFile() const = 0;
+    virtual bool isDirectory() const = 0;
 };
 
 enum OpenMode {
@@ -57,13 +60,16 @@ class DirImpl {
     virtual FileImplPtr openFile(OpenMode openMode, AccessMode accessMode) = 0;
     virtual const char* fileName() = 0;
     virtual size_t fileSize() = 0;
+    virtual bool isFile() const = 0;
+    virtual bool isDirectory() const = 0;
     virtual bool next() = 0;
+    virtual bool rewind() = 0;
 };
 
 class FSImpl {
 public:
     virtual ~FSImpl () { }
-    virtual bool begin() = 0;
+    virtual bool begin(const FSConfig *cfg) = 0;
     virtual void end() = 0;
     virtual bool format() = 0;
     virtual bool info(FSInfo& info) = 0;
@@ -72,7 +78,8 @@ class FSImpl {
     virtual DirImplPtr openDir(const char* path) = 0;
     virtual bool rename(const char* pathFrom, const char* pathTo) = 0;
     virtual bool remove(const char* path) = 0;
-
+    virtual bool mkdir(const char* path) = 0;
+    virtual bool rmdir(const char* path) = 0;
 };
 
 } // namespace fs