Added partition table type select option (MBR/GPT/hybrid)

Since some of the build target platforms do not support hybrid partition table and require only MBR (AWS AMI), was added option that allows selecting a partition table type:

```
-e parrtable_type=type
```

where `type` can be one of: `mbr`, `gpt`, `hybrid`.
Default value is `hybrid`.

1 files changed, 37 insertions, 5 deletions

diff --git a/roles/setup-root-partition/tasks/main.yml b/roles/setup-root-partition/tasks/main.yml
index 57ba5ae..bf183f3 100644
--- a/roles/setup-root-partition/tasks/main.yml
+++ b/roles/setup-root-partition/tasks/main.yml
@@ -1,7 +1,38 @@
-- name: Partition disk
+- name: Partition disk (MBR)
+  become: true
+  command:
+      cmd: "sfdisk -q -X dos {{ vyos_raw_img }}"
+      stdin: "3,+,L,*"
+  when: vyos_parttable_type == "mbr"
+
+- name: Partition disk (GPT)
+  become: true
+  command:
+      cmd: "sgdisk -a1 -n1:34:+256M -t1:EF00 -n2:0:0:+100% -t2:8300 {{ vyos_raw_img }}"
+  when: vyos_parttable_type == "gpt"
+
+- name: Partition disk (hybrid)
   become: true
   command:
       cmd: "sgdisk -a1 -n1:34:2047 -t1:EF02 -n2:2048:+256M -t2:EF00 -n3:0:0:+100% -t3:8300 {{ vyos_raw_img }}"
+  when: vyos_parttable_type == "hybrid"
+
+- name: Set partition numbers for next actions (MBR)
+  set_fact:
+    partition_num_root: 1
+  when: vyos_parttable_type == "mbr"
+
+- name: Set partition numbers for next actions (GPT)
+  set_fact:
+    partition_num_efi: 1
+    partition_num_root: 2
+  when: vyos_parttable_type == "gpt"
+
+- name: Set partition numbers for next actions (hybrid)
+  set_fact:
+    partition_num_efi: 2
+    partition_num_root: 3
+  when: vyos_parttable_type == "hybrid"
 
 - name: Reread partitions from image and mount to loopback
   become: true
@@ -21,20 +52,21 @@
   become: true
   filesystem:
     fstype: "vfat"
-    device: "{{ vyos_target_drive }}p2"
+    device: "{{ vyos_target_drive }}p{{ partition_num_efi }}"
     opts: "-n EFI -F 32 -s 1"
- 
+  when: partition_num_efi is defined
+
 - name: Create a fileystem on root partition
   become: true
   filesystem:
     fstype: "{{ vyos_root_fstype }}"
-    device: "{{ vyos_target_drive }}p3"
+    device: "{{ vyos_target_drive }}p{{ partition_num_root }}"
     opts: "-L persistence"
 
 - name: Mount root partition
   become: true
   mount:
     name: "{{ vyos_write_root }}"
-    src: "{{ vyos_target_drive }}p3"
+    src: "{{ vyos_target_drive }}p{{ partition_num_root }}"
     fstype: "{{ vyos_root_fstype }}"
     state: mounted