Python flavor image failing: FileNotFoundError: [Errno 2] No such file or directory: 'shfmt'

[bcdady]

Describe the bug
Running the the python 'flavor' image errors out instead of displaying the final SUMMARY table.
I was able to reproduce the error messages / symptom when running from both 'local' mega-linter-runner and also in my GitLab CI pipeline.
I was also able to reproduce this error with the 'documentation' flavor. The error does not show when running the full mega-linter image.

To Reproduce

1. $> npx mega-linter-runner -p ~/repo/data/ci --flavor python
2. 3. See error

Expected behavior
mega-linter runs and display 'SUMMARY' table without errors

Error Output
[Text Reporter] Generated TEXT report: /builds/data/ci/report/linters_logs/SUCCESS-YAML_V8R.log
multiprocessing.pool.RemoteTraceback:
"""
Traceback (most recent call last):
File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 125, in worker
result = (True, func(*args, **kwds))
File "/megalinter/MegaLinter.py", line 27, in run_linters
linter.run()
File "/megalinter/Linter.py", line 419, in run
return_code, stdout = self.process_linter(file)
File "/megalinter/Linter.py", line 528, in process_linter
return_code, return_output = self.execute_lint_command(command)
File "/megalinter/Linter.py", line 564, in execute_lint_command
process = subprocess.run(
File "/usr/local/lib/python3.8/subprocess.py", line 489, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/local/lib/python3.8/subprocess.py", line 854, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File "/usr/local/lib/python3.8/subprocess.py", line 1702, in _execute_child
raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'shfmt'
"""
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/runpy.py", line 194, in _run_module_as_main
return _run_code(code, main_globals, None,
File "/usr/local/lib/python3.8/runpy.py", line 87, in _run_code
exec(code, run_globals)
File "/megalinter/run.py", line 15, in
linter.run()
File "/megalinter/MegaLinter.py", line 125, in run
self.process_linters_parallel(active_linters, linters_do_fixes)
File "/megalinter/MegaLinter.py", line 208, in process_linters_parallel
updated_linters = pool_result.get()
File "/usr/local/lib/python3.8/multiprocessing/pool.py", line 771, in get
raise self._value
FileNotFoundError: [Errno 2] No such file or directory: 'shfmt'

Additional context
macOS 11.1
zsh in iTerm2

[nvuillam]

Thanks for reporting, i'll have a look !

Meanwhile, you can bypass the error by adding the following in your .mega-linter.yml file at the root of your repository

DISABLE_LINTERS:
  - BASH_SHFMT

[nvuillam]

@bcdady solved and released in 4.24.1 :)
shfmt uses go language, and go wasn't installed correctly in flavors not containing golangci-lint :)

If you still see an issue please reopen !