terragrunt run-all fmt does not write changes

[crablab]

Command: terragrunt run-all fmt

Expected behaviour: Terragrunt runs terraform fmt in modules, outputting files that have formatting errors and modifying them to meet the format. In other words, the default behaviour of fmt.

Actual behaviour: fmt runs and outputs a list of files that don't meet the standard, but doesn't make changes to these files. Setting -write=true makes no difference.

Is this expected? It's odd to me that the fmt behaviour is as expected, except for persisting the formatting corrections to disk.

[denis256]

Hi, afaik formatting of files is executed on files, maybe occurs an error during processing of files? adding --terragrunt-log-level debug to terragrunt may help to show what happens inside

A simplified example for terragrunt that modify files when is invoked terragrunt run-all fmt: https://github.com/denis256/terragrunt-tests/tree/master/issue-2127

$ git status
On branch master
Your branch is up to date with 'origin/master'.

nothing to commit, working tree clean

$ terragrunt run-all fmt
Group 1
- Module /home/denis/projects/gruntwork/terragrunt-tests/issue-2127/module1
- Module /home/denis/projects/gruntwork/terragrunt-tests/issue-2127/module2

Group 2
- Module /home/denis/projects/gruntwork/terragrunt-tests/issue-2127/app
 
main.tf
main.tf
main.tf

$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   app/main.tf
        modified:   module1/main.tf
        modified:   module2/main.tf

[crablab]

Apart from the logline

DEBU[0004] Running command: terraform fmt 

afraid I don't see anything of relevance in the log outputs.

I can say that it is not modifying any files for certain.