utils: add postinstall.py

Replace ConfigureOs script by native calls to:

- update BCD via hivex using bcd.py and winreg.py infrastructure.
- restore efi bootloader restore_windows_efi_bootloader().

Call legacy scripts for remaining postinstall procedures to
replace them incrementally.

Define variable CONFIGUREOS_LEGACY_ENABLED as False by default.
Run legacy configureOs when CONFIGUREOS_LEGACY_ENABLED = True.
This serves as a auxiliar method to keep the restoration functional
in case of problems with the new configure_os logic.

3 files changed, 175 insertions, 25 deletions

diff --git a/src/live/ogOperations.py b/src/live/ogOperations.py
index 7958e9e..d4817f6 100644
--- a/src/live/ogOperations.py
+++ b/src/live/ogOperations.py
@@ -23,6 +23,7 @@ from src.live.partcodes import GUID_MAP
 from src.live.parttypes import get_parttype
 
 from src.utils.image import *
+from src.utils.postinstall import configure_os
 from src.utils.net import ethtool
 from src.utils.menu import generate_menu
 from src.utils.fs import *
@@ -455,14 +456,14 @@ class OgLiveOperations:
         return result
 
     def image_restore(self, request, ogRest):
-        disk = request.getDisk()
-        partition = request.getPartition()
+        disk = int(request.getDisk())
+        partition = int(request.getPartition())
         name = request.getName()
         repo = request.getRepo()
         ctype = request.getType()
         profile = request.getProfile()
         cid = request.getId()
-        partdev = get_partition_device(int(disk), int(partition))
+        partdev = get_partition_device(disk, partition)
 
         self._ogbrowser_clear_logs()
         self._restartBrowser(self._url_log)
@@ -477,7 +478,7 @@ class OgLiveOperations:
         elif ctype == 'TIPTORRENT':
             self._restore_image_tiptorrent(repo, name, partdev)
 
-        configureOs(disk, partition)
+        configure_os(disk, partition)
 
         self.refresh(ogRest)
 
diff --git a/src/utils/image.py b/src/utils/image.py
index fe48a9c..a12c221 100644
--- a/src/utils/image.py
+++ b/src/utils/image.py
@@ -234,24 +234,3 @@ def restoreImageCustom(repo_ip, image_name, disk, partition, method):
         except OSError as e:
             raise OgError(f'Error processing restoreImageCustom: {e}') from e
     return proc.returncode
-
-
-def configureOs(disk, partition):
-    """
-    """
-    if shutil.which('configureOsCustom'):
-        cmd_configure = f"configureOsCustom {disk} {partition}"
-    else:
-        cmd_configure = f"configureOs {disk} {partition}"
-
-    try:
-        proc = subprocess.run(cmd_configure,
-                              stdout=PIPE,
-                              encoding='utf-8',
-                              shell=True,
-                              check=True)
-        out = proc.stdout
-    except OSError as e:
-        raise OgError(f'Error processing configureOsCustom: {e}') from e
-
-    return out
diff --git a/src/utils/postinstall.py b/src/utils/postinstall.py
new file mode 100644
index 0000000..f6332b0
--- /dev/null
+++ b/src/utils/postinstall.py
@@ -0,0 +1,170 @@
+#
+# Copyright (C) 2022 Soleta Networks <info@soleta.eu>
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+import subprocess
+import shutil
+import logging
+import hivex
+from src.log import OgError
+from src.utils.bcd import update_bcd
+from src.utils.probe import *
+from src.utils.disk import *
+from src.utils.winreg import *
+from src.utils.fs import *
+from src.utils.uefi import *
+from socket import gethostname
+
+CONFIGUREOS_LEGACY_ENABLED = False
+
+
+def configure_os_custom(disk, partition):
+    if not shutil.which('configureOsCustom'):
+        raise OgError('configureOsCustom not found')
+
+    cmd_configure = f"configureOsCustom {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+        out = proc.stdout
+    except OSError as e:
+        raise OgError(f'Error processing configureOsCustom: {e}') from e
+
+
+def windows_register_c_drive(disk, partition):
+    cmd_configure = f"ogWindowsRegisterPartition {disk} {partition} C {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+    except OSError as e:
+        raise OgError(f'Error processing ogWindowsRegisterPartition: {e}') from e
+
+
+def configure_mbr_boot_sector(disk, partition):
+    cmd_configure = f"ogFixBootSector {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+    except OSError as e:
+        raise OgError(f'Error processing ogFixBootSector: {e}') from e
+
+
+def configure_grub_in_mbr(disk, partition):
+    cmd_configure = f"ogGrubInstallMbr {disk} {partition} TRUE"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+    except OSError as e:
+        raise OgError(f'Error processing ogGrubInstallMbr: {e}') from e
+
+
+def configure_fstab(disk, partition):
+    cmd_configure = f"ogConfigureFstab {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+    except OSError as e:
+        raise OgError(f'Error processing ogConfigureFstab: {e}') from e
+
+
+def install_grub(disk, partition):
+    cmd_configure = f"ogGrubInstallPartition {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+    except OSError as e:
+        raise OgError(f'Error processing ogGrubInstallPartition: {e}') from e
+
+
+def configure_os_linux(disk, partition):
+    configure_fstab(disk, partition)
+
+    if is_uefi_supported():
+        _, _, esp_part_number = get_efi_partition(disk, enforce_gpt=True)
+        configure_grub_in_mbr(disk, esp_part_number)
+
+    install_grub(disk, partition)
+
+
+def configure_os_windows(disk, partition):
+    if is_uefi_supported():
+        restore_windows_efi_bootloader(disk, partition)
+
+        _, _, esp_part_number = get_efi_partition(disk, enforce_gpt=True)
+        configure_grub_in_mbr(disk, esp_part_number)
+    else:
+        configure_mbr_boot_sector(disk, partition)
+
+    update_bcd(disk, partition)
+    windows_register_c_drive(disk, partition)
+
+
+def configure_os_legacy(disk, partition):
+    cmd_configure = f"configureOs {disk} {partition}"
+
+    try:
+        proc = subprocess.run(cmd_configure,
+                              stdout=subprocess.PIPE,
+                              encoding='utf-8',
+                              shell=True,
+                              check=True)
+        out = proc.stdout
+    except OSError as e:
+        raise OgError(f'Error processing configureOs: {e}') from e
+
+
+def configure_os(disk, partition):
+    if CONFIGUREOS_LEGACY_ENABLED:
+        configure_os_legacy(disk, partition)
+
+        if shutil.which('configureOsCustom'):
+            configure_os_custom(disk, partition)
+
+        return
+
+    device = get_partition_device(disk, partition)
+    mountpoint = device.replace('dev', 'mnt')
+
+    if not mount_mkdir(device, mountpoint):
+        raise OgError(f'Cannot probe OS family. Unable to mount {device} into {mountpoint}')
+
+    os_family = get_os_family(mountpoint)
+    umount(mountpoint)
+
+    extend_filesystem(disk, partition)
+
+    if os_family == OSFamily.WINDOWS:
+        configure_os_windows(disk, partition)
+    elif os_family == OSFamily.LINUX:
+        configure_os_linux(disk, partition)
+
+    if shutil.which('configureOsCustom'):
+        configure_os_custom(disk, partition)