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#!/bin/sh -e
# sdn-open: an opener for sdn that makes use of Midnight Commander configuration
# to make more kinds of files directly openable
if [ "$#" -ne 1 ]
then
echo "Usage: $0 FILE" >&2
exit 2
fi
# This handles both MC_DATADIR and odd installation locations.
datadir=
if command -v mc >/dev/null
then datadir=$(mc --datadir | sed 's/ (.*)$//')
fi
config=
for dir in "$HOME"/.config/mc "$datadir" /etc/mc
do
if [ -n "$dir" -a -f "$dir/mc.ext.ini" ]
then
config=$dir/mc.ext.ini
break
fi
done
# This is often used in %env{} expansion, so let's be on the same page.
export PAGER=${PAGER:-less}
export MC_EXT_FILENAME=$(realpath "$1")
export MC_EXT_BASENAME=$(basename "$1")
export MC_EXT_CURRENTDIR=$(dirname "$MC_EXT_FILENAME")
output=$(sdn-mc-ext <"$config" "$(file -Lbz "$1")" \
"$MC_EXT_FILENAME" "$MC_EXT_BASENAME" "$MC_EXT_CURRENTDIR" Open || :)
kind=$(echo "$output" | sed -n 1p)
command=$(echo "$output" | sed -n 2p)
# We're trying to retain any explicit user preferences while navigating through:
# - Debian-based systems have /etc/alternatives/open as /usr/bin/open,
# pointing to either /usr/bin/xdg-open or /usr/bin/run-mailcap;
# - macOS has /usr/bin/open, and typically no xdg-open;
# - Windows Subsystem for Linux has explorer.exe in PATH,
# where launched applications may have problems with UNC paths,
# and possibly also xdg-open that may not be capable of opening much.
#
# Both macOS open and Windows explorer.exe are capable of opening files,
# directories, as well as URLs through native associations.
if [ -n "$MC_XDG_OPEN" ]
then :
elif command -v explorer.exe >/dev/null
then export MC_XDG_OPEN=explorer.exe
elif command -v open >/dev/null
then export MC_XDG_OPEN=open
elif command -v xdg-open >/dev/null
then export MC_XDG_OPEN=xdg-open
fi
case "$kind" in
cd)
# These mostly enter virtual filesystems, which we do not understand.
"$MC_XDG_OPEN" "$MC_EXT_FILENAME"
;;
'')
if [ -n "$command" ]
then eval "$command"
else "$MC_XDG_OPEN" "$MC_EXT_FILENAME"
fi
;;
*)
echo "Unsupported: $kind" >&2
exit 1
esac
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