--timestamp does nothing if only instruction is from

[graywolf-at-work]

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

When you have a Containerfile that has only from instruction, the --timestamp
option for podman build does nothing.

Steps to reproduce the issue:

 echo 'from docker.io/library/alpine:3.16' >Containerfile && podman build --iidfile id --timestamp 0 . && podman inspect $(cat id) | jq -r .[].Created

Describe the results you received:

[..]
2022-07-18T21:00:15.928720935Z

Describe the results you expected:

[..]
1970-01-01T00:00:00Z

Additional information you deem important (e.g. issue happens only occasionally):

N/A

Output of podman version:

Client:       Podman Engine
Version:      4.1.0
API Version:  4.1.0
Go Version:   go1.18.4
Git Commit:   112d29a88c7813a70b55004ec305f48630b43e12
Built:        Thu Jul 21 20:43:18 2022
OS/Arch:      linux/amd64

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.26.1
  cgroupControllers:
  - cpuset
  - cpu
  - io
  - memory
  - hugetlb
  - pids
  cgroupManager: cgroupfs
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.2-r0
    path: /usr/bin/conmon
    version: 'conmon version 2.1.2, commit: f25214cda836296fe8695c2e582ca79d2246053a'
  cpuUtilization:
    idlePercent: 84.46
    systemPercent: 3.16
    userPercent: 12.38
  cpus: 16
  distribution:
    distribution: alpine
    version: 3.16.1
  eventLogger: file
  hostname: HOSTNAME
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1234
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1234
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 5.15.57-0-lts
  linkmode: dynamic
  logDriver: k8s-file
  memFree: 4304928768
  memTotal: 29255086080
  networkBackend: cni
  ociRuntime:
    name: crun
    package: crun-1.4.5-r0
    path: /usr/bin/crun
    version: |-
      crun version 1.4.5
      commit: c381048530aa750495cf502ddb7181f2ded5b400
      spec: 1.0.0
      +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +YAJL
  os: linux
  remoteSocket:
    path: /var/run/1234-rdir/podman/podman.sock
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /etc/containers/seccomp.json
    selinuxEnabled: false
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.0-r0
    version: |-
      slirp4netns version 1.2.0
      commit: 656041d45cfca7a4176f6b7eed9e4fe6c11e8383
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.2
  swapFree: 34356596736
  swapTotal: 34359734272
  uptime: 33h 25m 58.8s (Approximately 1.38 days)
plugins:
  log:
  - k8s-file
  - none
  - passthrough
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /home/user/.config/containers/storage.conf
  containerStore:
    number: 4
    paused: 0
    running: 0
    stopped: 4
  graphDriverName: btrfs
  graphOptions: {}
  graphRoot: /home/user/.local/share/containers/storage
  graphRootAllocated: 989776052224
  graphRootUsed: 67633455104
  graphStatus:
    Build Version: Btrfs v5.17
    Library Version: "102"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 94
  runRoot: /var/run/1234-rdir/containers
  volumePath: /home/user/.local/share/containers/storage/volumes
version:
  APIVersion: 4.1.0
  Built: 1658428998
  BuiltTime: Thu Jul 21 20:43:18 2022
  GitCommit: 112d29a88c7813a70b55004ec305f48630b43e12
  GoVersion: go1.18.4
  Os: linux
  OsArch: linux/amd64
  Version: 4.1.0

Package info (e.g. output of rpm -q podman or apt list podman):

podman-4.1.0-r2 description:
Simple management tool for pods, containers and images

podman-4.1.0-r2 webpage:
https://podman.io/

podman-4.1.0-r2 installed size:
33 MiB

podman-4.1.0-r3 description:
Simple management tool for pods, containers and images

podman-4.1.0-r3 webpage:
https://podman.io/

podman-4.1.0-r3 installed size:
33 MiB

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide? (https://github.com/containers/podman/blob/main/troubleshooting.md)

No

Additional environment details (AWS, VirtualBox, physical, etc.):

N/A

[flouthoc]

Hi @graywolf-at-work , Thanks for creating the issue. I think that is expected since existing image is retagged and no new image is created.

[graywolf-at-work]

I will make a PR documenting this then. Thanks for explaining :)

[graywolf-at-work]

I assume the man pages are build from the markdown I've edited in the PR. Is the correct or are other changes required as well?

[rhatdan]

Does this work for you.
$ ctr=$(buildah from -q fedora)
$ id=$(buildah commit -q --timestamp 0 $ctr myfedora)
$ podman inspect $id | jq -r .[].Created
1970-01-01T00:00:00Z

[graywolf-at-work]

Yes, that does seem to work, thank you. However, sadly I'm limited to using podman.

[rhatdan]

We should add the --timestamp option to Podman commit. Which would satisfy your needs.