COPY a file into image if it exists

[sparkwj]

https://stackoverflow.com/questions/31528384/conditional-copy-add-in-dockerfile

COPY requiements.tx[t] /destination

this command working well with docker, but when build with podman, it throw error "no such file or directory" while file requiements.txt not exists. podman not support the COPY pattern?

[flouthoc]

Hi @sparkwj ,

I just tried on latest upstream buildah and it worked fine for me.

FROM alpine
RUN mkdir dest
COPY req.tx[t] /dest
RUN cat /dest/req.txt

Could you please let me know which version are you trying this with ?

[sparkwj]

spark@MacBook-Pro test % podman build .

STEP 1/4: FROM alpine
Resolved "alpine" as an alias (/etc/containers/registries.conf.d/000-shortnames.conf)
Trying to pull docker.io/library/alpine:latest...
Getting image source signatures
Copying blob sha256:52f827f723504aa3325bb5a54247f0dc4b92bb72569525bc951532c4ef679bd4
Copying config sha256:7ad00e65ee25911881c06b97a3e562675d255e1265ba4abadd3e906d266c1dcc
Writing manifest to image destination
STEP 2/4: RUN mkdir dest
--> f0c006b17f14
STEP 3/4: COPY req.tx[t] /dest
Error: building at STEP "COPY req.tx[t] /dest": checking on sources under "/var/tmp/libpod_builder4102429835/build": Rel: can't make  relative to /var/tmp/libpod_builder4102429835/build; copier: stat: ["/req.tx[t]"]: no such file or directory

spark@MacBook-Pro test % podman info

host:
  arch: arm64
  buildahVersion: 1.38.0
  cgroupControllers:
  - cpu
  - io
  - memory
  - pids
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.1.12-2.fc40.aarch64
    path: /usr/bin/conmon
    version: 'conmon version 2.1.12, commit: '
  cpuUtilization:
    idlePercent: 98.23
    systemPercent: 1
    userPercent: 0.77
  cpus: 6
  databaseBackend: sqlite
  distribution:
    distribution: fedora
    variant: coreos
    version: "40"
  eventLogger: journald
  freeLocks: 2046
  hostname: localhost.localdomain
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1000
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
    uidmap:
    - container_id: 0
      host_id: 501
      size: 1
    - container_id: 1
      host_id: 100000
      size: 1000000
  kernel: 6.11.3-200.fc40.aarch64
  linkmode: dynamic
  logDriver: journald
  memFree: 1589641216
  memTotal: 2042683392
  networkBackend: netavark
  networkBackendInfo:
    backend: netavark
    dns:
      package: aardvark-dns-1.12.2-2.fc40.aarch64
      path: /usr/libexec/podman/aardvark-dns
      version: aardvark-dns 1.12.2
    package: netavark-1.12.2-1.fc40.aarch64
    path: /usr/libexec/podman/netavark
    version: netavark 1.12.2
  ociRuntime:
    name: crun
    package: crun-1.17-1.fc40.aarch64
    path: /usr/bin/crun
    version: |-
      crun version 1.17
      commit: 000fa0d4eeed8938301f3bcf8206405315bc1017
      rundir: /run/user/501/crun
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +LIBKRUN +WASM:wasmedge +YAJL
  os: linux
  pasta:
    executable: /usr/bin/pasta
    package: passt-0^20240906.g6b38f07-1.fc40.aarch64
    version: |
      pasta 0^20240906.g6b38f07-1.fc40.aarch64-pasta
      Copyright Red Hat
      GNU General Public License, version 2 or later
        <https://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
      This is free software: you are free to change and redistribute it.
      There is NO WARRANTY, to the extent permitted by law.
  remoteSocket:
    exists: true
    path: unix:///run/user/501/podman/podman.sock
  rootlessNetworkCmd: pasta
  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: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: true
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.2.2-2.fc40.aarch64
    version: |-
      slirp4netns version 1.2.2
      commit: 0ee2d87523e906518d34a6b423271e4826f71faf
      libslirp: 4.7.0
      SLIRP_CONFIG_VERSION_MAX: 4
      libseccomp: 2.5.5
  swapFree: 0
  swapTotal: 0
  uptime: 0h 1m 33.00s
  variant: v8
plugins:
  authorization: null
  log:
  - k8s-file
  - none
  - passthrough
  - journald
  network:
  - bridge
  - macvlan
  - ipvlan
  volume:
  - local
registries:
  search:
  - docker.io
store:
  configFile: /var/home/core/.config/containers/storage.conf
  containerStore:
    number: 1
    paused: 0
    running: 0
    stopped: 1
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /var/home/core/.local/share/containers/storage
  graphRootAllocated: 106769133568
  graphRootUsed: 8151801856
  graphStatus:
    Backing Filesystem: xfs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Supports shifting: "false"
    Supports volatile: "true"
    Using metacopy: "false"
  imageCopyTmpDir: /var/tmp
  imageStore:
    number: 35
  runRoot: /run/user/501/containers
  transientStore: false
  volumePath: /var/home/core/.local/share/containers/storage/volumes
version:
  APIVersion: 5.3.1
  Built: 1732147200
  BuiltTime: Thu Nov 21 08:00:00 2024
  GitCommit: ""
  GoVersion: go1.22.7
  Os: linux
  OsArch: linux/arm64
  Version: 5.3.1