[fix][cli] Pulsar shell: allow absolute config file

[nicoloboschi]

Motivation

When creating a config with the --file option, absolute paths are not allowed.

Modifications

• Do not prepend the current dir if the passed file is absolute

Documentation

• doc
• doc-required
• doc-not-needed
• doc-complete

[tisonkun]

Since the baseDir is fixed in our case, I'd prefer:

static File resolveLocalFile(String input) {
  final File file = new File(input);
  if (!file.isAbsolute()) {
    return new File(LOCAL_FILES_BASE_DIR, input);
  }
  return file;
}

But it's a style preference, so not a blocker to merge this patch.

+1

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 47.41%. Comparing base (68ca60c) to head (5a38e1f).
⚠️ Report is 3181 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master   #18805      +/-   ##
============================================
- Coverage     50.05%   47.41%   -2.65%     
+ Complexity    11024    10581     -443     
============================================
  Files           703      703              
  Lines         68814    68814              
  Branches       7378     7378              
============================================
- Hits          34446    32629    -1817     
- Misses        30621    32511    +1890     
+ Partials       3747     3674      -73     

Flag	Coverage Δ
unittests	47.41% <ø> (-2.65%)	⬇️

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