ref: c7a92d3104807f2831b706642adbd3492e440ac3
dir: /contrib/bash_compl/_rgbgfx.bash/
#!/usr/bin/env bash
# Same notes as RGBASM
_rgbgfx_completions() {
# Format: "long_opt:state_after"
# Empty long opt = it doesn't exit
# See the `state` variable below for info about `state_after`
declare -A opts=(
[V]="version:normal"
[C]="color-curve:normal"
[m]="mirror-tiles:normal"
[u]="unique-tiles:normal"
[v]="verbose:normal"
[Z]="columns:normal"
[a]="attr-map:glob-*.attrmap"
[A]="output-attr-map:normal"
[b]="base-tiles:unk"
[d]="depth:unk"
[L]="slice:unk"
[N]="nb-tiles:unk"
[n]="nb-palettes:unk"
[o]="output:glob-*.2bpp"
[p]="palette:glob-*.pal"
[P]="output-palette:normal"
[q]="palette-map:glob-*.palmap"
[Q]="output-palette-map:normal"
[r]="reverse:unk"
[s]="palette-size:unk"
[t]="tilemap:glob-*.tilemap"
[T]="output-tilemap:normal"
[x]="trim-end:unk"
)
# Parse command-line up to current word
local opt_ena=true
# Possible states:
# - normal = Well, normal. Options are parsed normally.
# - unk = An argument that can't be completed, and should just be skipped.
# - warning = A warning flag.
# - dir = A directory path
# - glob-* = A glob, after the dash is a whitespace-separated list of file globs to use
local state=normal
# The length of the option, used as a return value by the function below
local optlen=0
# $1: a short option word
# `state` will be set to the parsing state after the last option character in the word. If
# "normal" is not returned, `optlen` will be set to the length (dash included) of the "option"
# part of the argument.
parse_short_opt() {
for (( i = 1; i < "${#1}"; i++ )); do
# If the option is not known, assume it doesn't take an argument
local opt="${opts["${1:$i:1}"]:-":normal"}"
state="${opt#*:}"
# If the option takes an argument, record the length and exit
if [[ "$state" != 'normal' ]]; then
let optlen="$i + 1"
return
fi
done
optlen=0
}
for (( i = 1; i < COMP_CWORD; i++ )); do
local word="${COMP_WORDS[$i]}"
# If currently processing an argument, skip this word
if [[ "$state" != 'normal' ]]; then
state=normal
continue
fi
if [[ "$word" = '--' ]]; then
# Options stop being parsed after this
opt_ena=false
break
fi
# Check if it's a long option
if [[ "$word" = '--'* ]]; then
# If the option is unknown, assume it takes no arguments: keep the state at "normal"
for long_opt in "${opts[@]}"; do
if [[ "$word" = "--${long_opt%%:*}" ]]; then
state="${long_opt#*:}"
# Check if the next word is just '='; if so, skip it, the argument must follow
# (See "known bugs" at the top of this script)
let i++
if [[ "${COMP_WORDS[$i]}" != '=' ]]; then
let i--
fi
optlen=0
break
fi
done
# Check if it's a short option
elif [[ "$word" = '-'* ]]; then
parse_short_opt "$word"
# The last option takes an argument...
if [[ "$state" != 'normal' ]]; then
if [[ "$optlen" -ne "${#word}" ]]; then
# If it's contained within the word, we won't complete it, revert to "normal"
state=normal
else
# Otherwise, complete it, but start at the beginning of *that* word
optlen=0
fi
fi
fi
done
# Parse current word
# Careful that it might look like an option, so use `--` aggressively!
local cur_word="${COMP_WORDS[$i]}"
# Process options, as short ones may change the state
if $opt_ena && [[ "$state" = 'normal' && "$cur_word" = '-'* ]]; then
# We might want to complete to an option or an arg to that option
# Parse the option word to check
# There's no whitespace in the option names, so we can ride a little dirty...
# Is this a long option?
if [[ "$cur_word" = '--'* ]]; then
# It is, try to complete one
mapfile -t COMPREPLY < <(compgen -W "${opts[*]%%:*}" -P '--' -- "${cur_word#--}")
return 0
else
# Short options may be grouped, parse them to determine what to complete
parse_short_opt "$cur_word"
if [[ "$state" = 'normal' ]]; then
mapfile -t COMPREPLY < <(compgen -W "${!opts[*]}" -P "$cur_word" '')
return 0
elif [[ "$optlen" = "${#cur_word}" && "$state" != "warning" ]]; then
# This short option group only awaits its argument!
# Post the option group as-is as a reply so that Readline inserts a space,
# so that the next completion request switches to the argument
# An exception is made for warnings, since it's idiomatic to stick them to the
# `-W`, and it doesn't break anything.
COMPREPLY=( "$cur_word" )
return 0
fi
fi
fi
COMPREPLY=()
case "$state" in
unk) # Return with no replies: no idea what to complete!
;;
normal) # Acts like a glob...
state="glob-*.png"
;&
glob-*)
while read -r word; do
COMPREPLY+=("${cur_word:0:$optlen}$word")
done < <(for glob in ${state#glob-}; do compgen -A file -X \!"$glob" -- "${cur_word:$optlen}"; done)
# Also complete directories
;&
dir)
while read -r word; do
COMPREPLY+=("${cur_word:0:$optlen}$word")
done < <(compgen -A directory -- "${cur_word:$optlen}")
compopt -o filenames
;;
*)
echo >&2 "Internal completion error: invalid state \"$state\", please report this bug"
return 1
;;
esac
}
complete -F _rgbgfx_completions rgbgfx