Bug#977339: pandoc: `data-dir` or `XDG_DATA_HOME` don't appear to work for --defaults

Package: pandoc
Version: 2.9.2.1-1+b1
Severity: normal

Dear Maintainer,

The --defaults option does not appear to look in $HOME/.local/share/pandoc/
it also does not appear to look into $XDG_DATA_HOME/pandoc/ to look
for the file mentioned in this option.

$ export XDG_DATA_HOME=$HOME/.local/share
$ pandoc -d options report.md
pandoc: options.yaml: openBinaryFile: does not exist (No such file or directory)

(This is in spite of the fact that $HOME/.local/share/pandoc/options.yaml exists.)

The man page mentions these two locations.

Regards,

Kapil.
--

-- System Information:
Debian Release: bullseye/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.14.199-16598-gb08cd9ce6991 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_IN.utf8, LC_CTYPE=en_IN.utf8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: unable to detect

Versions of packages pandoc depends on:
ii libc6 2.31-5
ii libcmark-gfm-extensions0 0.29.0.gfm.0-6
ii libcmark-gfm0 0.29.0.gfm.0-6
ii libffi7 3.3-5
ii libgmp10 2:6.2.1+dfsg-1
ii libpcre3 2:8.39-13
ii pandoc-data 2.9.2.1-1
ii zlib1g 1:1.2.11.dfsg-2

pandoc recommends no packages.

Versions of packages pandoc suggests:
pn citation-style-language-styles <none>
pn context <none>
pn ghc <none>
ii groff 1.22.4-5
pn libjs-mathjax <none>
pn librsvg2-bin <none>
pn node-katex <none>
pn nodejs <none>
ii pandoc-citeproc 0.17.0.1-1+b1
ii perl 5.32.0-5
pn php <none>
pn python <none>
pn r-base-core <none>
ii ruby 1:2.7+2
ii texlive-latex-extra 2020.20201129-1
ii texlive-latex-recommended 2020.20200925-1
ii texlive-luatex 2020.20200925-1
pn texlive-xetex <none>
pn wkhtmltopdf <none>

-- no debconf information