Add support for converting final image to qcow2

3 files changed, 17 insertions, 0 deletions

diff --git a/bin/vmdebootstrap b/bin/vmdebootstrap
index ff30853..b9dc559 100755
--- a/bin/vmdebootstrap
+++ b/bin/vmdebootstrap
@@ -124,6 +124,7 @@ class VmDebootstrap(cliapp.Application):  # pylint: disable=too-many-public-meth
                               'included in the image.')
         self.settings.boolean(['no-acpid'], 'do not install the acpid package', default=False)
         self.settings.boolean(['no-update-initramfs'], 'Skip running update-initramfs', default=False)
+        self.settings.boolean(['convert-qcow2'], 'Convert final image to qcow2', default=False)
         self.settings.boolean(['dry-run'], 'do not build, just test the options', default=False)
 
     def process_args(self, args):  # pylint: disable=too-many-branches,too-many-statements
@@ -266,6 +267,7 @@ class VmDebootstrap(cliapp.Application):  # pylint: disable=too-many-public-meth
             elif self.settings['squash']:
                 filesystem.squash_rootfs()
             filesystem.chown()
+            filesystem.convert_image_to_qcow2()
 
         except BaseException as e:
             base.message('EEEK! Something bad happened...')
diff --git a/doc/overview.rst b/doc/overview.rst
index e2605b7..7347686 100644
--- a/doc/overview.rst
+++ b/doc/overview.rst
@@ -149,6 +149,7 @@ Options
  --dry-run             Do not build, just test that the options are valid.
  --no-update-initramfs Skip the call to ``update-initramfs`` for reasons of
                        speed or practicality.
+ --convert-qcow2       Convert the final raw image to qcow2 format.
 
 Configuration files and settings
 ********************************
diff --git a/vmdebootstrap/filesystem.py b/vmdebootstrap/filesystem.py
index 484371b..f5e6483 100644
--- a/vmdebootstrap/filesystem.py
+++ b/vmdebootstrap/filesystem.py
@@ -282,3 +282,17 @@ class Filesystem(Base):
         bootsize = self.settings['esp-size'] / (1024 * 1024) + 1
         runcmd(['parted', '-s', self.settings['image'],
                 'mkpart', 'primary', str(bootsize), extent])
+
+    def convert_image_to_qcow2(self):
+        """
+        Current images are all prepared as raw
+        rename to .raw and let the conversion put the
+        original name back
+        """
+        if not self.settings['convert-qcow2']:
+            return
+        self.message('Converting raw image to qcow2')
+        tmpname = self.settings['image'] + '.raw'
+        os.rename(self.settings['image'], tmpname)
+        runcmd(['qemu-img', 'convert', '-O', 'qcow2',
+               tmpname, self.settings['image']])