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glabels-3-batch: Add support for stdin/stdout pipelines #49

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pushytoxin opened this issue Mar 7, 2019 · 2 comments · May be fixed by #65
Open
2 tasks

glabels-3-batch: Add support for stdin/stdout pipelines #49

pushytoxin opened this issue Mar 7, 2019 · 2 comments · May be fixed by #65

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@pushytoxin
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pushytoxin commented Mar 7, 2019 •
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This would add a powerful use case where one could feed glabels-3-batch with CSV data on the input, use a template, and pipe the resulting PDF to lp for immediate printing.

Currently this is possible with a sleight of hand: the /dev/stdout file can be set as output file, but the stdout will also be used for writing LABEL FILE = test.glabels.

Is the LABEL FILE output useful to anyone?

Todos:

  • support the glabels-3-batch -o - shorthand to signify stdout as the output pdf file
  • clean up any use of diagnostic writes onto the stdout, and use stderr instead
@toggenation
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toggenation commented Jan 27, 2020 •
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Thanks for the above I didn't know you could redirect to /dev/stdout

But trying the following the LABEL FILE output corrupts the resulting PDF.

cat merge.csv | glabels-3-batch -o /dev/stdout -i - 100x50sample.glabels | \
sed -n '/%PDF-1.5/,/%%EOF/p' | lpr -PPDF -J jobname

@hildred
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hildred commented Apr 30, 2020

Here is another workaround

./s.perl|glabels-3-batch -C -i - -o /dev/stderr i.glabels 1>/dev/null 2>&1 |lpr

by the way

./s.perl|glabels-3-batch -C -i - -o - i.glabels |sed -n '/%PDF-1.5/,/%%EOF/p'|lpr

also currently works

@hildred hildred linked a pull request Apr 30, 2020 that will close this issue
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Remove most uses of stdout for debug, etc. #49. hildred/glabels
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@pushytoxin @toggenation @hildred