generic.dockerfile.best-practice.use-absolute-workdir.use-absolute-workdir

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Detected a relative WORKDIR. Use absolute paths. This prevents issues based on assumptions about the WORKDIR of previous containers.

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Defintion

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rules:
  - id: use-absolute-workdir
    pattern-either:
      - patterns:
          - pattern: WORKDIR $VALUE
          - metavariable-pattern:
              metavariable: $VALUE
              patterns:
                - pattern-not-regex: (\/.*)
      - patterns:
          - pattern: ENV $VAR=$VALUE ... $CMD ${$VAR}
          - metavariable-pattern:
              metavariable: $VALUE
              patterns:
                - pattern-not-regex: (\/.*)
          - metavariable-pattern:
              metavariable: $CMD
              pattern: WORKDIR
          - focus-metavariable: $CMD
    message: Detected a relative WORKDIR. Use absolute paths. This prevents issues
      based on assumptions about the WORKDIR of previous containers.
    severity: WARNING
    languages:
      - generic
    metadata:
      source-rule-url: https://github.com/hadolint/hadolint/wiki/DL3000
      references:
        - https://github.com/hadolint/hadolint/wiki/DL3000
      category: best-practice
      technology:
        - dockerfile
      license: Commons Clause License Condition v1.0[LGPL-2.1-only]
    paths:
      include:
        - "*dockerfile*"
        - "*Dockerfile*"

Examples

use-absolute-workdir.dockerfile

FROM busybox

# ruleid: use-absolute-workdir
WORKDIR usr/src/app

# ok: use-absolute-workdir
WORKDIR /usr/src/app

ENV dirpath=bar
# ruleid: use-absolute-workdir
WORKDIR ${dirpath}

ENV dirpath=/bar
# ok: use-absolute-workdir
WORKDIR ${dirpath}