ports: Use vfs module instead of os.

Signed-off-by: Damien George <damien@micropython.org>

ports/esp32/modules/_boot.py

@@ -1,13 +1,13 @@
 import gc
-import os
+import vfs
 from flashbdev import bdev
 
 try:
     if bdev:
-        os.mount(bdev, "/")
+        vfs.mount(bdev, "/")
 except OSError:
     import inisetup
 
-    vfs = inisetup.setup()
+    inisetup.setup()
 
 gc.collect()

ports/esp32/modules/inisetup.py

@@ -1,4 +1,4 @@
-import os
+import vfs
 from flashbdev import bdev
 
 
@@ -38,12 +38,12 @@ def setup():
     check_bootsec()
     print("Performing initial setup")
     if bdev.info()[4] == "vfs":
-        os.VfsLfs2.mkfs(bdev)
-        vfs = os.VfsLfs2(bdev)
+        vfs.VfsLfs2.mkfs(bdev)
+        fs = vfs.VfsLfs2(bdev)
     elif bdev.info()[4] == "ffat":
-        os.VfsFat.mkfs(bdev)
-        vfs = os.VfsFat(bdev)
-    os.mount(vfs, "/")
+        vfs.VfsFat.mkfs(bdev)
+        fs = vfs.VfsFat(bdev)
+    vfs.mount(fs, "/")
     with open("boot.py", "w") as f:
         f.write(
             """\
@@ -54,4 +54,4 @@ def setup():
 #webrepl.start()
 """
         )
-    return vfs
+    return fs

ports/esp8266/boards/ESP8266_GENERIC/board.md

@@ -13,7 +13,7 @@ Note: v1.12-334 and newer (including v1.13) require an ESP8266 module with
 2MiB of flash or more, and use littlefs as the filesystem by default.  When
 upgrading from older firmware please backup your files first, and either
 erase all flash before upgrading, or after upgrading execute
-`os.VfsLfs2.mkfs(bdev)`.
+`vfs.VfsLfs2.mkfs(bdev)`.
 
 ### OTA builds
 Over-The-Air (OTA) builds of the ESP8266 firmware are also provided.

ports/esp8266/modules/_boot.py

@@ -1,12 +1,12 @@
 import gc
 
 gc.threshold((gc.mem_free() + gc.mem_alloc()) // 4)
-import os
+import vfs
 from flashbdev import bdev
 
 if bdev:
     try:
-        os.mount(bdev, "/")
+        vfs.mount(bdev, "/")
     except:
         import inisetup
 

ports/esp8266/modules/inisetup.py

@@ -1,4 +1,4 @@
-import os
+import vfs
 import network
 from flashbdev import bdev
 
@@ -36,7 +36,7 @@ def fs_corrupted():
             """\
 The filesystem starting at sector %d with size %d sectors looks corrupt.
 You may want to make a flash snapshot and try to recover it. Otherwise,
-format it with os.VfsLfs2.mkfs(bdev), or completely erase the flash and
+format it with vfs.VfsLfs2.mkfs(bdev), or completely erase the flash and
 reprogram MicroPython.
 """
             % (bdev.start_sec, bdev.blocks)
@@ -48,9 +48,9 @@ def setup():
     check_bootsec()
     print("Performing initial setup")
     wifi()
-    os.VfsLfs2.mkfs(bdev)
-    vfs = os.VfsLfs2(bdev)
-    os.mount(vfs, "/")
+    vfs.VfsLfs2.mkfs(bdev)
+    fs = vfs.VfsLfs2(bdev)
+    vfs.mount(fs, "/")
     with open("boot.py", "w") as f:
         f.write(
             """\

ports/mimxrt/boards/TEENSY40/format.py

@@ -1,11 +1,11 @@
 # format.py
 # Re-create the file system
 
-import os
+import vfs
 import mimxrt
 
 bdev = mimxrt.Flash()
 
-os.VfsLfs2.mkfs(bdev, progsize=256)
-vfs = os.VfsLfs2(bdev, progsize=256)
-os.mount(vfs, "/")
+vfs.VfsLfs2.mkfs(bdev, progsize=256)
+fs = vfs.VfsLfs2(bdev, progsize=256)
+vfs.mount(fs, "/")

ports/mimxrt/modules/_boot.py

@@ -3,17 +3,18 @@
 # Note: the flash requires the programming size to be aligned to 256 bytes.
 
 import os
+import vfs
 import sys
 import mimxrt
 from machine import Pin
 
 bdev = mimxrt.Flash()
 try:
-    vfs = os.VfsLfs2(bdev, progsize=256)
+    fs = vfs.VfsLfs2(bdev, progsize=256)
 except:
-    os.VfsLfs2.mkfs(bdev, progsize=256)
-    vfs = os.VfsLfs2(bdev, progsize=256)
-os.mount(vfs, "/flash")
+    vfs.VfsLfs2.mkfs(bdev, progsize=256)
+    fs = vfs.VfsLfs2(bdev, progsize=256)
+vfs.mount(fs, "/flash")
 os.chdir("/flash")
 sys.path.append("/flash")
 sys.path.append("/flash/lib")
@@ -27,8 +28,8 @@ except:
 
         sdcard = SDCard(1)
 
-        fat = os.VfsFat(sdcard)
-        os.mount(fat, "/sdcard")
+        fat = vfs.VfsFat(sdcard)
+        vfs.mount(fat, "/sdcard")
         os.chdir("/sdcard")
         sys.path.append("/sdcard")
     except:

ports/nrf/examples/mountsd.py

@@ -20,7 +20,7 @@ Direct wiring on SD card (SPI):
   ---------------------------------
 """
 
-import os
+import os, vfs
 from machine import SPI, Pin
 from sdcard import SDCard
 
@@ -28,7 +28,7 @@ from sdcard import SDCard
 def mnt():
     cs = Pin("P22", mode=Pin.OUT)
     sd = SDCard(SPI(0), cs)
-    os.mount(sd, "/")
+    vfs.mount(sd, "/")
 
 
 def list():

ports/nrf/examples/seeed_tft.py

@@ -44,7 +44,7 @@ Example usage of SD card reader:
     tf = mount_tf()
     os.listdir()
 """
-import os
+import vfs
 import time
 import framebuf
 
@@ -54,7 +54,7 @@ from sdcard import SDCard
 
 def mount_tf(self, mount_point="/"):
     sd = SDCard(SPI(0), Pin("P15", mode=Pin.OUT))
-    os.mount(sd, mount_point)
+    vfs.mount(sd, mount_point)
 
 
 class ILI9341:

ports/nrf/modules/scripts/_mkfs.py

@@ -1,19 +1,19 @@
-import os, nrf
+import vfs, nrf
 
 try:
-    from os import VfsLfs1
+    from vfs import VfsLfs1
 
-    os.VfsLfs1.mkfs(nrf.Flash())
+    vfs.VfsLfs1.mkfs(nrf.Flash())
 except ImportError:
     try:
-        from os import VfsLfs2
+        from vfs import VfsLfs2
 
-        os.VfsLfs2.mkfs(nrf.Flash())
+        vfs.VfsLfs2.mkfs(nrf.Flash())
     except ImportError:
         try:
-            from os import VfsFat
+            from vfs import VfsFat
 
-            os.VfsFat.mkfs(nrf.Flash())
+            vfs.VfsFat.mkfs(nrf.Flash())
         except ImportError:
             pass
         except OSError as e:

ports/rp2/modules/_boot.py

@@ -1,4 +1,4 @@
-import os
+import vfs
 import machine, rp2
 
 
@@ -6,10 +6,10 @@ import machine, rp2
 # Note: the flash requires the programming size to be aligned to 256 bytes.
 bdev = rp2.Flash()
 try:
-    vfs = os.VfsLfs2(bdev, progsize=256)
+    fs = vfs.VfsLfs2(bdev, progsize=256)
 except:
-    os.VfsLfs2.mkfs(bdev, progsize=256)
-    vfs = os.VfsLfs2(bdev, progsize=256)
-os.mount(vfs, "/")
+    vfs.VfsLfs2.mkfs(bdev, progsize=256)
+    fs = vfs.VfsLfs2(bdev, progsize=256)
+vfs.mount(fs, "/")
 
-del os, bdev, vfs
+del vfs, bdev, fs

ports/rp2/modules/_boot_fat.py

@@ -1,15 +1,14 @@
-import os
+import vfs
 import machine, rp2
 
 
 # Try to mount the filesystem, and format the flash if it doesn't exist.
 bdev = rp2.Flash()
 try:
-    vfs = os.VfsFat(bdev)
-    os.mount(vfs, "/")
+    fs = vfs.VfsFat(bdev)
 except:
-    os.VfsFat.mkfs(bdev)
-    vfs = os.VfsFat(bdev)
-os.mount(vfs, "/")
+    vfs.VfsFat.mkfs(bdev)
+    fs = vfs.VfsFat(bdev)
+vfs.mount(fs, "/")
 
-del os, bdev, vfs
+del vfs, bdev, fs

ports/samd/modules/_boot.py

@@ -1,21 +1,21 @@
 import gc
-import os
+import vfs
 import samd
 import sys
 
 bdev = samd.Flash()
 
 # Try to mount the filesystem, and format the flash if it doesn't exist.
-fs_type = os.VfsLfs2 if hasattr(os, "VfsLfs2") else os.VfsLfs1
+fs_type = vfs.VfsLfs2 if hasattr(vfs, "VfsLfs2") else vfs.VfsLfs1
 
 try:
-    vfs = fs_type(bdev, progsize=256)
+    fs = fs_type(bdev, progsize=256)
 except:
     fs_type.mkfs(bdev, progsize=256)
-    vfs = fs_type(bdev, progsize=256)
-os.mount(vfs, "/")
+    fs = fs_type(bdev, progsize=256)
+vfs.mount(fs, "/")
 sys.path.append("/lib")
 
-del vfs, fs_type, bdev, os, samd, sys
+del fs, fs_type, bdev, vfs, samd, sys
 gc.collect()
 del gc