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Better handling of stdin, stdout, stderr #150

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danburzo opened this issue Feb 19, 2023 · 1 comment · Fixed by #151
Closed
3 tasks done

Better handling of stdin, stdout, stderr #150

danburzo opened this issue Feb 19, 2023 · 1 comment · Fixed by #151

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@danburzo
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danburzo commented Feb 19, 2023 •
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Percollate can read from stdin when using - (dash) as an operand. To make things a bit more ergonomic, we could consume stdin implicitly when no operands are provided:

  • Consume from stdin when no operand is provided

For text-based formats, such as html, we could also allow output to stdout with the -o - / --output=- option, to offer better composability with other tools that may wish to process the output further:

  • Accept --output=- option for placing the result on stdout.

This requires us to output any progress / diagnostic information to stderr instead of stdout:

  • Log to stderr instead of stdout

Then there's the question of outputting to stdout when multiple inputs are specified along with the --individual flag. Should we just concatenate the results?
danburzo added a commit that referenced this issue Feb 19, 2023
@danburzo
Fixes #150. Better handling of stdin, stdout, stderr:
ac5231e 
* consume input from 'stdin' when no operands are provided
* output all info/errors to 'stderr'
* allow output HTML to 'stdout' with '-o -' option
@danburzo danburzo mentioned this issue Feb 19, 2023
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@danburzo danburzo removed the Research label Feb 19, 2023
@danburzo
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All the tasks should be implemented in the PR above. It seems to me this is a breaking change, since:

  • behavior on lack of operands has changed (defaults to stdin)
  • some things have moved from stdout to stderr

danburzo added a commit that referenced this issue Feb 19, 2023
@danburzo
Better handling of stdin, stdout, stderr (#151)

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630a540 
* Fixes #150. Better handling of stdin, stdout, stderr:

* consume input from 'stdin' when no operands are provided
* output all info/errors to 'stderr'
* allow output HTML to 'stdout' with '-o -' option

* Coerce output_path to string before writing to stdout, may be URL (from programmatic API)
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Better handling of stdin, stdout, stderr danburzo/percollate
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