wic: Add option to not change fstab

Create an option to wic doesn't change fstab file, the final
fstab file will be same that in rootfs and wic doesn't update
file, e.g adding a new mount point.

Users can control the fstab file content in base-files recipe.
This is useful if you want to only create an partition but not
add fstab mount point or add new mount point using label e.g:

LABEL=recovery /recovery auto defaults 0  1

(From OE-Core rev: 00420ec42140c1b752132bda190dede85756d157)

Signed-off-by: Fabio Berton <fabio.berton@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 13 insertions, 2 deletions

diff --git a/scripts/lib/wic/help.py b/scripts/lib/wic/help.py
index 83bd86e7c5..bd9c62e2e8 100644
--- a/scripts/lib/wic/help.py
+++ b/scripts/lib/wic/help.py
@@ -155,7 +155,7 @@ SYNOPSIS
         [-e | --image-name] [-s, --skip-build-check] [-D, --debug]
         [-r, --rootfs-dir] [-b, --bootimg-dir]
         [-k, --kernel-dir] [-n, --native-sysroot] [-f, --build-rootfs]
-        [-c, --compress-with] [-m, --bmap]
+        [-c, --compress-with] [-m, --bmap] [--no-fstab-update]
 
 DESCRIPTION
     This command creates an OpenEmbedded image based on the 'OE
@@ -227,6 +227,11 @@ DESCRIPTION
 
     The -m option is used to produce .bmap file for the image. This file
     can be used to flash image using bmaptool utility.
+
+    The --no-fstab-update option is used to doesn't change fstab file. When
+    using this option the final fstab file will be same that in rootfs and
+    wic doesn't update file, e.g adding a new mount point. User can control
+    the fstab file content in base-files recipe.
 """
 
 wic_list_usage = """
diff --git a/scripts/lib/wic/plugins/imager/direct.py b/scripts/lib/wic/plugins/imager/direct.py
index a6abc3d09e..60317eed22 100644
--- a/scripts/lib/wic/plugins/imager/direct.py
+++ b/scripts/lib/wic/plugins/imager/direct.py
@@ -71,6 +71,7 @@ class DirectPlugin(ImagerPlugin):
         self.outdir = options.outdir
         self.compressor = options.compressor
         self.bmap = options.bmap
+        self.no_fstab_update = options.no_fstab_update
 
         self.name = "%s-%s" % (os.path.splitext(os.path.basename(wks_file))[0],
                                strftime("%Y%m%d%H%M"))
@@ -165,7 +166,10 @@ class DirectPlugin(ImagerPlugin):
         filesystems from the artifacts directly and combine them into
         a partitioned image.
         """
-        new_rootfs = self._write_fstab(self.rootfs_dir.get("ROOTFS_DIR"))
+        if self.no_fstab_update:
+            new_rootfs = None
+        else:
+            new_rootfs = self._write_fstab(self.rootfs_dir.get("ROOTFS_DIR"))
         if new_rootfs:
             # rootfs was copied to update fstab
             self.rootfs_dir['ROOTFS_DIR'] = new_rootfs
diff --git a/scripts/wic b/scripts/wic
index 592a0e4c25..097084a603 100755
--- a/scripts/wic
+++ b/scripts/wic
@@ -342,6 +342,8 @@ def wic_init_parser_create(subparser):
                       dest='compressor',
                       help="compress image with specified compressor")
     subparser.add_argument("-m", "--bmap", action="store_true", help="generate .bmap")
+    subparser.add_argument("--no-fstab-update" ,action="store_true",
+                      help="Do not change fstab file.")
     subparser.add_argument("-v", "--vars", dest='vars_dir',
                       help="directory with <image>.env files that store "
                            "bitbake variables")