install-latex-indent-macos

$ brew install --cask mactex
# restart terminal, then:
$ which perl
/opt/homebrew/bin/perl
$ latexindent --help
Can't locate YAML/Tiny.pm in @INC (you may need to install the YAML::Tiny module) (@INC contains: /usr/local/texlive/2021/texmf-dist/scripts/latexindent /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0/darwin-thread-multi-2level /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0 /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/5.34.0/darwin-thread-multi-2level /opt/homebrew/Cellar/perl
[...]
$ cpan YAML::Tiny
$ latexindent --help
Can't locate File/HomeDir.pm in @INC (you may need to install the File::HomeDir module) (@INC contains: /usr/local/texlive/2021/texmf-dist/scripts/latexindent /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0/darwin-thread-multi-2level /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/site_perl/5.34.0 /opt/homebrew/Cellar/perl/5.34.0/lib/perl5/5.34.0/darwin-thread-multi-2level
[...]
$ cpan File::HomeDir
$ latexindent --help
Can't locate Unicode/GCString.pm in @INC (you may need to install the Unicode::GCString module) (@INC contains: /usr/local/texlive/2021/texmf-dist/scripts/latexindent /opt/homebrew/Cellar/perl/5.34.0/...
$ cpan Unicode/GCString.pm
$ latexindent --help
latexindent.pl version 3.9.1, 2021-03-21
usage: latexindent.pl [options] [file]
      -v, --version
          displays the version number and date of release
      -h, --help
          help (see the documentation for detailed instructions and examples)
      -sl, --screenlog
          log file will also be output to the screen
      -o, --outputfile=<name-of-output-file>
          output to another file; sample usage:
                latexindent.pl -o outputfile.tex myfile.tex
                latexindent.pl -o=outputfile.tex myfile.tex
      -w, --overwrite
          overwrite the current file; a backup will be made, but still be careful
      -s, --silent
          silent mode: no output will be given to the terminal
      -t, --trace
          tracing mode: verbose information given to the log file
      -l, --local[=myyaml.yaml]
          use `localSettings.yaml`, `.localSettings.yaml`, `latexindent.yaml`,
          or `.latexindent.yaml` (assuming one of them exists in the directory of your file or in
          the current working directory); alternatively, use `myyaml.yaml`, if it exists;
          sample usage:
                latexindent.pl -l some.yaml myfile.tex
                latexindent.pl -l=another.yaml myfile.tex
                latexindent.pl -l=some.yaml,another.yaml myfile.tex
      -y, --yaml=<yaml settings>
          specify YAML settings; sample usage:
                latexindent.pl -y="defaultIndent:' '" myfile.tex
                latexindent.pl -y="defaultIndent:' ',maximumIndentation:' '" myfile.tex
      -d, --onlydefault
          ONLY use defaultSettings.yaml, ignore ALL (yaml) user files
      -g, --logfile=<name of log file>
          used to specify the name of logfile (default is indent.log)
      -c, --cruft=<cruft directory>
          used to specify the location of backup files and indent.log
      -m, --modifylinebreaks
          modify linebreaks before, during, and at the end of code blocks;
          trailing comments and blank lines can also be added using this feature
      -r, --replacement
          replacement mode, allows you to replace strings and regular expressions
          verbatim blocks not respected
      -rv, --replacementrespectverb
          replacement mode, allows you to replace strings and regular expressions
          while respecting verbatim code blocks
      -rr, --onlyreplacement
          *only* replacement mode, no indentation;
          verbatim blocks not respected