When using the command line export tool the page index, and page range arguments have unexpected behaviour

[casperlamboo]

Preflight Checklist

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Describe the bug
I'm using the command line tool to export specific pages from my draw.io document. According to draw.io --help this can be achieved by using the page (-p) argument.

  -p, --page-index <pageIndex>       selects a specific page, if not specified
                                     and the format is an image, the first page
                                     is selected

However when I do this for lets say page 2, all pages from page 2 and up are exported (I only expected page 2 to be exported).

The range index -g argument seems to do nothing at all.

  -g, --page-range <from>..<to>      selects a page range (for PDF format only)

To Reproduce
Steps to reproduce the behavior:

1. Download pages.drawio.zip
2. In your command line navigate to the file and execute $ draw.io -x ./pages.drawio -f pdf -p 2 -o ./page_index.pdf. For good measure also execute $ draw.io -x ./pages.drawio -f pdf -g 2..2 -o ./page_range.pdf

Expected behavior
For files page_index.pdf and page_range.pdf only page 2 is exported. While in reality all pages are exported for page_range.pdf and pages 2 and up are exported for page_index.pdf.

Screenshots
Not applicable

draw.io version (In the Help->About menu of the draw.io editor):

$ draw.io -V
14.6.13

Desktop (please complete the following information):
Desktop, MacOS V10.15.7

Smartphone (please complete the following information):
Not applicable

Additional context
Not applicable

[romankarlstetter]

I have the same problem on Windows 10, using draw.io version 18.0.0. My workaround is to only have one page per document.

[stale]

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[baldassarreFe]

Same bug with version 21.1.2 running in linux. Curiously, if the generated multi-page PDF is included in Latex as a figure, only the first page is shown, while opening the .pdf file in a pdf viewer shows all pages.

@casperlamboo while waiting for the fix, I just use pdftk to cut the first page:

find . -name '*.drawio' -print0 |
  sed 's/.drawio//g' |
  xargs --no-run-if-empty --verbose --null --replace='{}' \
  drawio '{}.drawio' --transparent --crop --export --output '{}.allpages.pdf'

find . -name '*.allpages.pdf' -print0 |
  sed 's/.allpages.pdf//g' |
  xargs --no-run-if-empty --verbose --null --replace='{}' \
  pdftk '{}.allpages.pdf' cat 1 output '{}.pdf'

find . -name '*.allpages.pdf' -print -delete

[github-actions]

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[luketych]

Same issue on mac.