[Compass-ci] Re: [PATCH v2 compass-ci] doc: optimize os_mount.md

It looks the below logic can be further improved to

if [ -n "$use_root_partition" ]; then src_lv_suffix=_$use_root_partition else src_lv_suffix=$timestamp fi

if [ -n "$save_root_partition" ]; then boot_lv_suffix=_$save_root_partition else boot_lv_suffix= fi

local base_path=/dev/mapper/os-openeuler_aarch64_20.03 SRC_LV="${base_path}${src_lv_suffix}" BOOT_LV="${base_path}${boot_lv_suffix}"

if [ -n "$use_root_partition" ]; then check_src_lv ${SRC_LV} else rsync_src_lv ${SRC_LV} fi

snapshot_boot_lv boot_from_lv

Thanks, Fengguang

• no_save_no_use()
• {

•    export SRC_LV="/dev/mapper/os-openeuler_aarch64_20.03_${timestamp}"
  

•    export BOOT_LV="/dev/mapper/os-openeuler_aarch64_20.03"
  

•    rsync_src_lv ${SRC_LV}
  

• }
• only_save()
• {

•    export SRC_LV="/dev/mapper/os-openeuler_aarch64_20.03_${timestamp}"
  

•    export BOOT_LV="/dev/mapper/os-openeuler_aarch64_20.03_${save_root_partition}"
  

•    rsync_src_lv ${SRC_LV}
  

• }
• only_use()
• {

•    export SRC_LV="/dev/mapper/os-openeuler_aarch64_20.03_${use_root_partition}"
  

•    export BOOT_LV="/dev/mapper/os-openeuler_aarch64_20.03"
  

•    check_src_lv ${SRC_LV}
  

• }
• save_and_use()
• {

•    export SRC_LV="/dev/mapper/os-openeuler_aarch64_20.03_${use_root_partition}"
  

•    export BOOT_LV="/dev/mapper/os-openeuler_aarch64_20.03_${save_root_partition}"
  

•    check_src_lv ${SRC_LV}
  

• }
• main()
• {

•    [ -z ${use_root_partition} ] && [ -z ${save_root_partition} ] && no_save_no_use
  

•    [ -z ${use_root_partition} ] && [ -n ${save_root_partition} ] && only_save
  

•    [ -n ${use_root_partition} ] && [ -z ${save_root_partition} ] && only_use
  

•    [ -n ${use_root_partition} ] && [ -n ${save_root_partition} ] && save_and_use
  

•    snapshot_boot_lv
  

•    boot_from_lv
  

• }
• main()

4. execute the job

-- 2.23.0