Debian Question posted in
The oficial documentation can be found here.

Is there any way to using hadolint for multiple dockerfiles? – Debian

Hadolint is an awesome tool for linting Dockerfiles. I am trying
to integrated to my CI but I am dealing with for run over multiple Dockerfiles. Does someone know how the syntax look like? Here is how my dirs appears to:

dir1/Dockerfile
dir2/Dockerfile
dir3/foo/Dockerfile

in gitlab-ci

  stage: hadolint
  image: hadolint/hadolint:latest-debian
  script:
  - mkdir -p reports
  - |
   hadolint dir1/Dockerfile > reports/dir1.json 
   hadolint dir2/Dockerfile > reports/dir2.json 
   hadolint dir3/foo/Dockerfile > reports/dir3.json

But the sample above is now working.

Tags:

2

Answers


  1. 0

    So as far as I found it, hadolint runs recursively. So in my case:

      - hadolint */Dockerfile > reports/all_reports.json

    But the problem with this approach is that all reports will be in one file which humper the maintenance and clarity

    Login or Signup to reply.
  2. 0

    If you want to keep all reports separated (one per top-level directory), you may want to rely on some shell snippet?

    I mean something like:

    - |
  find . -name Dockerfile -exec 
    sh -c 'src=${1#./} && { set -x && hadolint "$1"; } | tee -a "reports/${src%%/*}.txt"' sh "{}" ;

    Explanation:

    • find . -name Dockerfile loops over all Dockerfiles in the current directory;
    • -exec sh -c '…' runs a subshell for each Dockerfile, setting:
      • $0 = "sh" (dummy value)
      • $1 = "{}" (the full, relative path of the Dockerfile), "{}" and ; being directly related to the find … -exec pattern;
    • src=${1#./} trims the path, replacing ./dir1/Dockerfile with dir1/Dockerfile
    • ${src%%/*} extracts the top-level directory name (dir1/Dockerfile → dir1)
    • and | tee -a … copies the output, appending hadolint‘s output to the top-level directory report file, for each parsed Dockerfile (while > … should be avoided here for obvious reasons, if you have several Dockerfiles in a single top-level directory).
    • I have replaced the .json extension with .txt as hadolint does not seem to output JSON data.
    Login or Signup to reply.
Please signup or login to give your own answer.

Back To Top
Search