sx-open/sx-open

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#!/usr/bin/env bash
# This is an attempt to replace xdg-open with something sane.
usage() {
cat <<- EOF
sx-open [-dhv] <uri/file>
Flags:
-d Dry run
-v Verbose
-h Help
EOF
}
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act() {
(( verbose )) && printf 'CMD: %s\n' "$*" >&2
(( dry_run )) || { "$@"; return $?; }
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return 0
}
# handle_target <res> <uri>
# 1: cmd failed
# 3: no handler
handle_target() {
declare -n result=$1
declare h cmd regex target_is_file target target_left
target_is_file=0
target=$2
target_left=$target
if [[ -e "$target" ]]; then
target_is_file=1
[[ "$target" =~ ^/.* ]] || { target="${PWD}/${target}"; } # Turn relative paths to absolute ones.
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IFS=';' read target_mimetype charset <<< $( file -ib "$target" )
target_left=$target_mimetype
set -- "${mime_handlers[@]}"
elif is_uri "$target"; then
set -- "${uri_handlers[@]}"
else
return 2
fi
while (( $# )); do
cmd=( $1 ); regex=$2
if [[ "$target_left" =~ $regex ]]; then
act "${cmd[@]}" "$target"; result=$?
(( result )) && return 1
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return 0
fi
shift 2
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done
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return 3
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}
# DSL
uri() {
declare r handler=$1; shift
for r in "$@"; do
uri_handlers+=( "$handler" "$r" )
done
}
mime() {
declare r handler=$1; shift
for r in "$@"; do
mime_handlers+=( "$handler" "$r" )
done
}
scheme() {
declare r handler=$1; shift
for s in "$@"; do
uri_handlers+=( "$handler" "^$s:" )
done
}
is_uri() [[ $1 =~ ^[a-zA-Z][a-zA-Z0-9\+\.\-]+:.+ ]]
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main() {
declare cmd_result target
# Source the config file.
cfg_file="$HOME/.config/sx-open.cfg"
[[ -f "$cfg_file" ]] && { source "$cfg_file"; }
while (( $# )); do
case $1 in
(-d) dry_run=1; verbose=1;;
(-v) verbose=1;;
(-h) usage; return 0;;
(--) shift; break;;
(*) break;;
esac
shift
done
target=$1; [[ "$target" ]] || { usage; exit; }
(( dry_run )) && printf 'Dry run: not actually running the handler\n' >&2
# Treat file:// as local paths.
[[ "$target" =~ ^file:(//)?(/.+) ]] && target=${BASH_REMATCH[2]}
handle_target cmd_result "$target"
case $? in
(1)
printf 'Action failed with exit code: “%s”\n' "$cmd_result" >&2
return 4
;;
(2)
printf 'No such file or directory: “%s”\n' "$target" >&2
return 2
;;
(3)
printf 'No handlers found for “%s”\n' "$target" >&2
return 3
;;
esac
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return 0
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}
main "$@"