​Bash ​Docker with files

id: bash-docker-with-files
namespace: io.kestra.demo

description:
  This flow will use the `alpine` Docker image, install a package and decompress a file passed as input.
  It will also export the file size as metrics and the `mineType` of the file as outputs.

inputs:
  - name: gzip
    description: A valid Gzip to be decompressed.
    type: FILE

tasks:
  - id: unzip_file
    type: io.kestra.core.tasks.scripts.Bash
    outputFiles:
      - uncompress
    inputFiles:
      downloaded.zip: "{{ inputs.gzip }}"
    commands:
      - apk add file
      - gunzip -c downloaded.zip > {{ outputFiles.uncompress }}
      - |
        echo '::{"metrics": [{"name": "size", "type": "counter", "value": '$(wc -c < {{ outputFiles.uncompress }})'}]}::'
      - |
        echo '::{"outputs": {"mineType":"'$(file -b --mime-type {{ outputFiles.uncompress }})'"}}::'
    dockerOptions:
      image: alpine
    runner: DOCKER