[Bug 2045062] [NEW] ubuntu-image 3.1 fails to properly prepare gadget tree

[Erich Eickmeyer]

Public bug reported:

I'm getting the following error:

$ sudo ubuntu-image classic -w workdir/ -O output/ ubuntu-images/ubuntu-pi-arm64.yaml   
[0] parse_image_definition
[1] calculate_states
[2] make_temporary_directories
[3] determine_output_directory
[4] build_gadget_tree
[5] prepare_gadget_tree
[6] load_gadget_yaml
Error: Error copying gadget.yaml to workdir/gadget.yaml: unable to open workdir/unpack/gadget/meta/gadget.yaml: open workdir/unpack/gadget/meta/gadget.yaml: no such file or directory
The gadget.yaml file is expected to be located in a "meta" subdirectory of the provided built gadget directory.

name:      ubuntu-image
summary:   Create Ubuntu images
publisher: Canonical✓
store-url: https://snapcraft.io/ubuntu-image
contact:   snaps at canonical.com
license:   unset
description: |
  ubuntu-image is a tool used for creation of various Ubuntu preinstalled images, both classic and
  snap-based.
commands:
  - ubuntu-image
snap-id:      4RW78vIax8JW5S8HkYsa8lNbv68uPaYX
tracking:     latest/stable
refresh-date: today at 10:10 PST
channels:
  latest/stable:    3.1        2023-11-28 (658) 40MB classic
  latest/candidate: 3.1        2023-11-28 (658) 40MB classic
  latest/beta:      3.1        2023-11-28 (658) 40MB classic
  latest/edge:      3.1+snap3  2023-11-28 (668) 41MB classic
  2/stable:         2.2+snap10 2023-04-06 (322)  8MB classic
  2/candidate:      2.2+snap10 2023-04-06 (322)  8MB classic
  2/beta:           2.2+snap10 2023-04-06 (322)  8MB classic
  2/edge:           2.2+snap10 2023-04-06 (322)  8MB classic
installed:          3.1                   (658) 40MB classic

Note for volunteer triagers: Despite being a snap, this is the requested
place to report bugs for ubuntu-image.

** Affects: ubuntu-image (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2045062

Title:
  ubuntu-image 3.1 fails to properly prepare gadget tree

Status in ubuntu-image package in Ubuntu:
  New

Bug description:
  I'm getting the following error:

  $ sudo ubuntu-image classic -w workdir/ -O output/ ubuntu-images/ubuntu-pi-arm64.yaml   
  [0] parse_image_definition
  [1] calculate_states
  [2] make_temporary_directories
  [3] determine_output_directory
  [4] build_gadget_tree
  [5] prepare_gadget_tree
  [6] load_gadget_yaml
  Error: Error copying gadget.yaml to workdir/gadget.yaml: unable to open workdir/unpack/gadget/meta/gadget.yaml: open workdir/unpack/gadget/meta/gadget.yaml: no such file or directory
  The gadget.yaml file is expected to be located in a "meta" subdirectory of the provided built gadget directory.

  name:      ubuntu-image
  summary:   Create Ubuntu images
  publisher: Canonical✓
  store-url: https://snapcraft.io/ubuntu-image
  contact:   snaps at canonical.com
  license:   unset
  description: |
    ubuntu-image is a tool used for creation of various Ubuntu preinstalled images, both classic and
    snap-based.
  commands:
    - ubuntu-image
  snap-id:      4RW78vIax8JW5S8HkYsa8lNbv68uPaYX
  tracking:     latest/stable
  refresh-date: today at 10:10 PST
  channels:
    latest/stable:    3.1        2023-11-28 (658) 40MB classic
    latest/candidate: 3.1        2023-11-28 (658) 40MB classic
    latest/beta:      3.1        2023-11-28 (658) 40MB classic
    latest/edge:      3.1+snap3  2023-11-28 (668) 41MB classic
    2/stable:         2.2+snap10 2023-04-06 (322)  8MB classic
    2/candidate:      2.2+snap10 2023-04-06 (322)  8MB classic
    2/beta:           2.2+snap10 2023-04-06 (322)  8MB classic
    2/edge:           2.2+snap10 2023-04-06 (322)  8MB classic
  installed:          3.1                   (658) 40MB classic

  Note for volunteer triagers: Despite being a snap, this is the
  requested place to report bugs for ubuntu-image.

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