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|
#!/usr/bin/env bash
# bollux: a bash gemini client
# Author: Case Duckworth
# License: MIT
# Version: 0.4.0
# Program information
PRGN="${0##*/}"
VRSN=0.4.0
bollux_usage() {
cat <<END
$PRGN (v. $VRSN): a bash gemini client
usage:
$PRGN [-h]
$PRGN [-q] [-v] [URL]
flags:
-h show this help and exit
-q be quiet: log no messages
-v verbose: log more messages
parameters:
URL the URL to start in
If not provided, the user will be prompted.
END
}
run() { # run COMMAND...
log debug "$*"
"$@"
}
die() { # die EXIT_CODE MESSAGE
local ec="$1"
shift
log error "$*"
exit "$ec"
}
# https://github.com/dylanaraps/pure-bash-bible/
trim_string() { # trim_string STRING
: "${1#"${1%%[![:space:]]*}"}"
: "${_%"${_##*[![:space:]]}"}"
printf '%s\n' "$_"
}
log() { # log LEVEL MESSAGE
[[ "$BOLLUX_LOGLEVEL" == QUIET ]] && return
local fmt
case "$1" in
[dD]*) # debug
[[ "$BOLLUX_LOGLEVEL" == DEBUG ]] || return
fmt=34
;;
[eE]*) # error
fmt=31
;;
*) fmt=1 ;;
esac
shift
printf >&2 '\e[%sm%s:\e[0m\t%s\n' "$fmt" "$PRGN" "$*"
}
# main entry point
bollux() {
run bollux_config # TODO: figure out better config method
run bollux_args "$@" # and argument parsing
run bollux_init
if [[ ! "${BOLLUX_URL:+x}" ]]; then
run prompt GO BOLLUX_URL
fi
log d "BOLLUX_URL='$BOLLUX_URL'"
run blastoff "$BOLLUX_URL"
}
# process command-line arguments
bollux_args() {
while getopts :hvq OPT; do
case "$OPT" in
h)
bollux_usage
exit
;;
v) BOLLUX_LOGLEVEL=DEBUG ;;
q) BOLLUX_LOGLEVEL=QUIET ;;
:) die 1 "Option -$OPTARG requires an argument" ;;
*) die 1 "Unknown option: -$OPTARG" ;;
esac
done
shift $((OPTIND - 1))
if (($# == 1)); then
BOLLUX_URL="$1"
fi
}
# process config file and set variables
bollux_config() {
: "${BOLLUX_CONFIG:=${XDG_CONFIG_DIR:-$HOME/.config}/bollux/bollux.conf}"
if [ -f "$BOLLUX_CONFIG" ]; then
# shellcheck disable=1090
. "$BOLLUX_CONFIG"
else
log debug "Can't load config file '$BOLLUX_CONFIG'."
fi
## behavior
: "${BOLLUX_TIMEOUT:=30}" # connection timeout
: "${BOLLUX_MAXREDIR:=5}" # max redirects
: "${BOLLUX_PORT:=1965}" # port number
: "${BOLLUX_PROTO:=gemini}" # default protocol
: "${BOLLUX_URL:=}" # start url
: "${BOLLUX_BYEMSG:=See You Space Cowboy...}" # bye message
## files
: "${BOLLUX_DATADIR:=${XDG_DATA_DIR:-$HOME/.local/share}/bollux}"
: "${BOLLUX_DOWNDIR:=.}" # where to save downloads
: "${BOLLUX_LESSKEY:=$BOLLUX_DATADIR/lesskey}" # where to store binds
: "${BOLLUX_PAGESRC:=$BOLLUX_DATADIR/pagesrc}" # where to save the source
BOLLUX_HISTFILE="$BOLLUX_DATADIR/history" # where to save the history
## typesetting
: "${T_MARGIN:=4}" # left and right margin
: "${T_WIDTH:=0}" # width of the viewport -- 0 = get term width
# colors -- these will be wrapped in \e[ __ m
C_RESET='\e[0m' # reset
: "${C_SIGIL:=35}" # sigil (=>, #, ##, ###, *, ```)
: "${C_LINK_NUMBER:=1}" # link number
: "${C_LINK_TITLE:=4}" # link title
: "${C_LINK_URL:=36}" # link URL
: "${C_HEADER1:=1;4}" # header 1 formatting
: "${C_HEADER2:=1}" # header 2 formatting
: "${C_HEADER3:=3}" # header 3 formatting
: "${C_LIST:=0}" # list formatting
: "${C_QUOTE:=3}" # quote formatting
: "${C_PRE:=0}" # preformatted text formatting
}
# quit happily
bollux_quit() {
log x "$BOLLUX_BYEMSG"
exit
}
# set the terminal title
set_title() { # set_title STRING
printf '\e]2;%s\007' "$*"
}
# prompt for input
prompt() { # prompt [-u] PROMPT [READ_ARGS...]
local read_cmd=(read -e -r)
if [[ "$1" == "-u" ]]; then
read_cmd+=(-i "$BOLLUX_URL")
shift
fi
local prompt="$1"
shift
read_cmd+=(-p "$prompt> ")
"${read_cmd[@]}" </dev/tty "$@"
}
# load a URL
blastoff() { # blastoff [-u] URL
local well_formed=true
local proto url
if [[ "$1" == "-u" ]]; then
well_formed=false
shift
fi
url="$1"
if $well_formed && [[ "$1" != "$BOLLUX_URL" ]]; then
url="$(run transform_resource "$BOLLUX_URL" "$1")"
fi
[[ "$url" != *://* ]] && url="$BOLLUX_PROTO://$url"
url="$(trim_string "$url")"
proto="${url%://*}"
log d "PROTO='$proto' URL='$url'"
{
if declare -Fp "${proto}_request" >/dev/null; then
run "${proto}_request" "$url"
else
log d "No request handler for '$proto'; trying gemini"
run gemini_request "$url"
fi
} | run normalize |
{
if declare -Fp "${proto}_response" >/dev/null; then
run "${proto}_response" "$url"
else
log d "No response handler for '$proto'; handling raw response"
raw_response
fi
}
}
# transform a URI according to RFC 3986 sec 5.2.2
transform_resource() { # transform_resource BASE_URL REFERENCE_URL
local -A R B T # reference, base url, target
eval "$(run parse_url B "$1")"
eval "$(run parse_url R "$2")"
# A non-strict parser may ignore a scheme in the reference
# if it is identical to the base URI's scheme.
if ! "${STRICT:-true}" && [[ "${R[scheme]}" == "${B[scheme]}" ]]; then
unset "${R[scheme]}"
fi
# basically pseudo-code from spec ported to bash
if isdefined "R[scheme]"; then
T[scheme]="${R[scheme]}"
isdefined "R[authority]" && T[authority]="${R[authority]}"
isdefined R[path] &&
T[path]="$(run remove_dot_segments "${R[path]}")"
isdefined "R[query]" && T[query]="${R[query]}"
else
if isdefined "R[authority]"; then
T[authority]="${R[authority]}"
isdefined "R[authority]" &&
T[path]="$(remove_dot_segments "${R[path]}")"
isdefined R[query] && T[query]="${R[query]}"
else
if isempty "R[path]"; then
T[path]="${B[path]}"
if isdefined R[query]; then
T[query]="${R[query]}"
else
T[query]="${B[query]}"
fi
else
if [[ "${R[path]}" == /* ]]; then
T[path]="$(remove_dot_segments "${R[path]}")"
else
T[path]="$(merge_paths "B[authority]" "${B[path]}" "${R[path]}")"
T[path]="$(remove_dot_segments "${T[path]}")"
fi
isdefined R[query] && T[query]="${R[query]}"
fi
T[authority]="${B[authority]}"
fi
T[scheme]="${B[scheme]}"
fi
isdefined R[fragment] && T[fragment]="${R[fragment]}"
# cf. 5.3 -- recomposition
local r
isdefined "T[scheme]" && r="$r${T[scheme]}:"
# remove the port from the authority
isdefined "T[authority]" && r="$r//${T[authority]%:*}"
r="$r${T[path]}"
isdefined T[query] && r="$r?${T[query]}"
isdefined T[fragment] && r="$r#${T[fragment]}"
printf '%s\n' "$r"
}
# merge URL paths according to RFC 3986 sec 5.2.3
merge_paths() { # merge_paths BASE_AUTHORITY BASE_PATH REFERENCE_PATH
# shellcheck disable=2034
local B_authority="$1"
local B_path="$2"
local R_path="$3"
# if R_path is empty, get rid of // in B_path
if [[ -z "$R_path" ]]; then
printf '%s\n' "${B_path//\/\//\//}"
return
fi
if isdefined "B_authority" && isempty "B_path"; then
printf '/%s\n' "${R_path//\/\//\//}"
else
if [[ "$B_path" == */* ]]; then
B_path="${B_path%/*}/"
else
B_path=""
fi
printf '%s/%s\n' "${B_path%/}" "${R_path#/}"
fi
}
# remove dot segments in paths according to RFC 3986 sec 5.2.4
remove_dot_segments() { # remove_dot_segments PATH
local input="$1"
local output
while [[ "$input" ]]; do
if [[ "$input" =~ ^\.\.?/ ]]; then
input="${input#${BASH_REMATCH[0]}}"
elif [[ "$input" =~ ^/\.(/|$) ]]; then
input="/${input#${BASH_REMATCH[0]}}"
elif [[ "$input" =~ ^/\.\.(/|$) ]]; then
input="/${input#${BASH_REMATCH[0]}}"
[[ "$output" =~ /?[^/]+$ ]]
output="${output%${BASH_REMATCH[0]}}"
elif [[ "$input" == . || "$input" == .. ]]; then
input=
else
[[ $input =~ ^(/?[^/]*)(/?.*)$ ]] || log debug NOMATCH
output="$output${BASH_REMATCH[1]}"
input="${BASH_REMATCH[2]}"
fi
done
printf '%s\n' "${output//\/\//\//}"
}
# parse a url using the reference regex in RFC 3986 appendix B
parse_url() { # eval "$(split_url NAME STRING)" => NAME[...]
local name="$1"
local string="$2"
local re='^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?'
[[ $string =~ $re ]] || return $?
local scheme="${BASH_REMATCH[2]}"
local authority="${BASH_REMATCH[4]}"
local path="${BASH_REMATCH[5]}"
local query="${BASH_REMATCH[7]}"
local fragment="${BASH_REMATCH[9]}"
for c in scheme authority query fragment; do
[[ "${!c}" ]] &&
run printf '%s[%s]=%q\n' "$name" "$c" "${!c}"
done
# unclear if the path is always set even if empty but it looks that way
run printf '%s[path]=%q\n' "$name" "$path"
}
# is a NAME defined ('set' in bash)?
isdefined() { [[ "${!1+x}" ]]; } # isdefined NAME
# is a NAME defined AND empty?
isempty() { [[ ! "${!1-x}" ]]; } # isempty NAME
# work with URLs
# https://github.com/dylanaraps/pure-bash-bible/
urlencode() { # urlencode STRING
local LC_ALL=C
for ((i = 0; i < ${#1}; i++)); do
: "${1:i:1}"
case "$_" in
[a-zA-Z0-9.~_-])
printf '%s' "$_"
;;
*)
printf '%%%02X' "'$_"
;;
esac
done
printf '\n'
}
# https://github.com/dylanaraps/pure-bash-bible/
urldecode() { # urldecode STRING
: "${1//+/ }"
printf '%b\n' "${_//%/\\x}"
}
# GEMINI
# https://gemini.circumlunar.space/docs/specification.html
gemini_request() { # gemini_request URL
local url port server
local ssl_cmd
url="$1"
port=1965
server="${url#*://}"
server="${server%%/*}"
ssl_cmd=(openssl s_client -crlf -quiet -connect "$server:$port")
ssl_cmd+=(-servername "$server") # SNI
# disable old TLS/SSL versions
ssl_cmd+=(-no_ssl3 -no_tls1 -no_tls1_1)
run "${ssl_cmd[@]}" <<<"$url" 2>/dev/null
}
gemini_response() { # gemini_response URL
local url code meta
local title
url="$1"
# we need a loop here so it waits for the first line
while read -t "$BOLLUX_TIMEOUT" -r code meta ||
{ (($? > 128)) && die 99 "Timeout."; }; do
break
done
log d "[$code] $meta"
case "$code" in
1*) # input
REDIRECTS=0
BOLLUX_URL="$url"
case "$code" in
10) run prompt "$meta" ;;
11) run prompt "$meta" -s ;; # password input
esac
run blastoff "?$(urlencode "$REPLY")"
;;
2*) # OK
REDIRECTS=0
BOLLUX_URL="$url"
# read ahead to find a title
local pretitle
while read -r; do
pretitle="$pretitle$REPLY"$'\n'
if [[ "$REPLY" =~ ^#[[:space:]]*(.*) ]]; then
title="${BASH_REMATCH[1]}"
break
fi
done
run history_append "$url" "${title:-}"
# read the body out and pipe it to display
{
printf '%s' "$pretitle"
passthru
} | run display "$meta" "${title:-}"
;;
3*) # redirect
((REDIRECTS += 1))
if ((REDIRECTS > BOLLUX_MAXREDIR)); then
die $((100 + code)) "Too many redirects!"
fi
run blastoff "$meta" # TODO: confirm redirect
;;
4*) # temporary error
REDIRECTS=0
die "$((100 + code))" "Temporary error [$code]: $meta"
;;
5*) # permanent error
REDIRECTS=0
die "$((100 + code))" "Permanent error [$code]: $meta"
;;
6*) # certificate error
REDIRECTS=0
log d "Not implemented: Client certificates"
# TODO: recheck the speck
die "$((100 + code))" "[$code] $meta"
;;
*)
[[ -z "${code-}" ]] && die 100 "Empty response code."
die "$((100 + code))" "Unknown response code: $code."
;;
esac
}
# GOPHER
# https://tools.ietf.org/html/rfc1436 protocol
# https://tools.ietf.org/html/rfc4266 url
gopher_request() { # gopher_request URL
local url server port type path
url="$1"
port=70
# RFC 4266
[[ "$url" =~ gopher://([^/?#:]*)(:([0-9]+))?(/((.))?(/?.*))?$ ]]
server="${BASH_REMATCH[1]}"
port="${BASH_REMATCH[3]:-70}"
type="${BASH_REMATCH[6]:-1}"
path="${BASH_REMATCH[7]}"
log d "URL='$url' SERVER='$server' TYPE='$type' PATH='$path'"
exec 9<>"/dev/tcp/$server/$port"
printf '%s\r\n' "$path" >&9
passthru <&9
}
gopher_response() { # gopher_response URL
local url pre type cur_server
pre=false
url="$1"
# RFC 4266
[[ "$url" =~ gopher://([^/?#:]*)(:([0-9]+))?(/((.))?(/?.*))?$ ]]
cur_server="${BASH_REMATCH[1]}"
type="${BASH_REMATCH[6]:-1}"
run history_append "$url" "" # TODO: get the title ??
log d "TYPE='$type'"
case "$type" in
0) # text
run display text/plain
;;
1) # menu
run gopher_convert | run display text/gemini
;;
3) # failure
die 203 "GOPHER: failed"
;;
7) # search
if [[ "$url" =~ $'\t' ]]; then
run gopher_convert | run display text/gemini
else
run prompt 'SEARCH'
run blastoff "$url $REPLY"
fi
;;
*) # something else
run download "$url"
;;
esac
}
# 'cat' but in pure bash
passthru() {
while IFS= read -r; do
printf '%s\n' "$REPLY"
done
}
# convert gophermap to text/gemini (probably naive)
gopher_convert() {
local type label path server port regex
# cf. https://github.com/jamestomasino/dotfiles-minimal/blob/master/bin/gophermap2gemini.awk
while IFS= read -r; do
printf -v regex '(.)([^\t]*)(\t([^\t]*)\t([^\t]*)\t([^\t]*))?'
if [[ "$REPLY" =~ $regex ]]; then
type="${BASH_REMATCH[1]}"
label="${BASH_REMATCH[2]}"
path="${BASH_REMATCH[4]:-/}"
server="${BASH_REMATCH[5]:-$cur_server}"
port="${BASH_REMATCH[6]}"
else
log e "CAN'T PARSE LINE"
printf '%s\n' "$REPLY"
continue
fi
case "$type" in
.) # end of file
printf '.\n'
break
;;
i) # label
case "$label" in
'#'* | '*'[[:space:]]*)
if $pre; then
printf '%s\n' '```'
pre=false
fi
;;
*)
if ! $pre; then
printf '%s\n' '```'
pre=true
fi
;;
esac
printf '%s\n' "$label"
;;
h) # html link
if $pre; then
printf '%s\n' '```'
pre=false
fi
printf '=> %s %s\n' "${path:4}" "$label"
;;
T) # telnet link
if $pre; then
printf '%s\n' '```'
pre=false
fi
printf '=> telnet://%s:%s/%s%s %s\n' \
"$server" "$port" "$type" "$path" "$label"
;;
*) # other type
if $pre; then
printf '%s\n' '```'
pre=false
fi
printf '=> gopher://%s:%s/%s%s %s\n' \
"$server" "$port" "$type" "$path" "$label"
;;
esac
done
if $pre; then
printf '%s\n' '```'
fi
# close the connection
exec 9<&-
exec 9>&-
}
# display the fetched content
display() { # display METADATA [TITLE]
local -a less_cmd
local i mime charset
# split header line
local -a hdr
IFS=';' read -ra hdr <<<"$1"
# title is optional but nice looking
local title
if (($# == 2)); then
title="$2"
fi
mime="$(trim_string "${hdr[0],,}")"
for ((i = 1; i <= "${#hdr[@]}"; i++)); do
h="${hdr[$i]}"
case "$h" in
*charset=*) charset="${h#*=}" ;;
esac
done
[[ -z "$mime" ]] && mime="text/gemini"
[[ -z "$charset" ]] && charset="utf-8"
log debug "mime='$mime'; charset='$charset'"
case "$mime" in
text/*)
set_title "$title${title:+ - }bollux"
less_cmd=(less -R)
mklesskey "$BOLLUX_LESSKEY" && less_cmd+=(-k "$BOLLUX_LESSKEY")
less_cmd+=(
-Pm"$(less_prompt_escape "$BOLLUX_URL") - bollux$"
-P='o\:open, g\:goto, [\:back, ]\:forward, r\:refresh$'
-m
)
local typeset
local submime="${mime#*/}"
if declare -Fp "typeset_$submime" &>/dev/null; then
typeset="typeset_$submime"
else
typeset="passthru"
fi
{
run iconv -f "${charset^^}" -t "UTF-8" |
run tee "$BOLLUX_PAGESRC" |
run "$typeset" |
run "${less_cmd[@]}" && bollux_quit
} || run handle_keypress "$?"
;;
*) run download "$BOLLUX_URL" ;;
esac
}
# escape strings for the less prompt
less_prompt_escape() { # less_prompt_escape STRING
local i
for ((i = 0; i < ${#1}; i++)); do
: "${1:i:1}"
case "$_" in
[\?:\.%\\]) printf '\%s' "$_" ;;
*) printf '%s' "$_" ;;
esac
done
printf '\n'
}
# generate a lesskey(1) file for custom keybinds
mklesskey() { # mklesskey FILENAME
lesskey -o "$1" - <<-END
#command
o quit 0 # 48 open a link
g quit 1 # 49 goto a url
[ quit 2 # 50 back
] quit 3 # 51 forward
r quit 4 # 52 re-request / download
G quit 5 # 53 goto a url (pre-filled)
# other keybinds
\\40 forw-screen-force
h left-scroll
l right-scroll
? status # 'status' will show a little help thing.
= noaction
END
}
# normalize files
normalize() {
shopt -s extglob
while IFS= read -r; do
# normalize line endings
printf '%s\n' "${REPLY//$'\r'?($'\n')/}"
done
shopt -u extglob
}
# typeset a text/gemini document
typeset_gemini() {
local pre=false
local ln=0 # link number
if ((T_WIDTH == 0)); then
shopt -s checkwinsize
(
:
:
) # XXX this doesn't work!?
log d "LINES=$LINES; COLUMNS=$COLUMNS"
T_WIDTH=$COLUMNS
fi
WIDTH=$((T_WIDTH - T_MARGIN))
((WIDTH < 0)) && WIDTH=80 # default if dumb
S_MARGIN=$((T_MARGIN - 1)) # spacing
log d "T_WIDTH=$T_WIDTH"
log d "WIDTH=$WIDTH"
while IFS= read -r; do
case "$REPLY" in
'```'*)
if $pre; then
pre=false
else
pre=true
fi
continue
;;
'=>'*)
: $((ln += 1))
gemini_link "$REPLY" $pre "$ln"
;;
'#'*) gemini_header "$REPLY" $pre ;;
'*'[[:space:]]*)
gemini_list "$REPLY" $pre
;;
'>'*)
gemini_quote "$REPLY" $pre
;;
*) gemini_text "$REPLY" $pre ;;
esac
done
}
gemini_link() {
local re="^(=>)[[:blank:]]*([^[:blank:]]+)[[:blank:]]*(.*)"
local s t a l # sigil, text, annotation(url), line
if ! ${2-false} && [[ "$1" =~ $re ]]; then
s="${BASH_REMATCH[1]}"
a="${BASH_REMATCH[2]}"
t="${BASH_REMATCH[3]}"
if [[ -z "$t" ]]; then
t="$a"
a=
fi
printf "\e[${C_SIGIL}m%${S_MARGIN}s ${C_RESET}" "$s"
printf -v l "\e[${C_LINK_NUMBER}m[%d]${C_RESET} \
\e[${C_LINK_TITLE}m%s${C_RESET} \
\e[${C_LINK_URL}m%s${C_RESET}\n" \
"$3" "$t" "$a"
fold_line "$WIDTH" "$l"
else
gemini_pre "$1"
fi
}
gemini_header() {
local re="^(#+)[[:blank:]]*(.*)"
local s t a l # sigil, text, annotation(lvl), line
if ! ${2-false} && [[ "$1" =~ $re ]]; then
s="${BASH_REMATCH[1]}"
a="${#BASH_REMATCH[1]}"
t="${BASH_REMATCH[2]}"
local hdrfmt
hdrfmt="$(eval echo "\$C_HEADER$a")"
printf "\e[${C_SIGIL}m%${S_MARGIN}s ${C_RESET}" "$s"
printf -v l "\e[${hdrfmt}m%s${C_RESET}\n" "$t"
fold_line "$WIDTH" "$l"
else
gemini_pre "$1"
fi
}
gemini_list() {
local re="^(\*)[[:blank:]]*(.*)"
local s t a l # sigil, text, annotation(n/a), line
if ! ${2-false} && [[ "$1" =~ $re ]]; then
s="${BASH_REMATCH[1]}"
t="${BASH_REMATCH[2]}"
printf "\e[${C_SIGIL}m%${S_MARGIN}s ${C_RESET}" "$s"
printf -v l "\e[${C_LIST}m%s${C_RESET}\n" "$t"
fold_line "$WIDTH" "$l"
else
gemini_pre "$1"
fi
}
gemini_quote() {
local re="^(>)[[:blank:]]*(.*)"
local s t a l
if ! ${2-false} && [[ "$1" =~ $re ]]; then
s="${BASH_REMATCH[1]}"
t="${BASH_REMATCH[2]}"
printf "\e[${C_SIGIL}m%${S_MARGIN}s ${C_RESET}" "$s"
printf -v l "\e[${C_QUOTE}m%s${C_RESET}\n" "$t"
fold_line "$WIDTH" "$l"
else
gemini_pre "$1"
fi
}
gemini_text() {
if ! ${2-false}; then
printf "%${S_MARGIN}s " ' '
fold_line "$WIDTH" "$1"
else
gemini_pre "$1"
fi
}
gemini_pre() {
printf "\e[${C_SIGIL}m%${S_MARGIN}s " '```'
printf "\e[${C_PRE}m%s${C_RESET}\n" "$1"
}
# wrap lines on words to WIDTH
fold_line() { # fold_line WIDTH TEXT
local width="$1"
local margin="${2%%[![:space:]]*}"
if [[ "$margin" ]]; then
margin="${#margin}"
else
margin="$T_MARGIN"
fi
local ll=0 wl plain
# shellcheck disable=2086
set -- $2 # TODO: is this the best way?
for word; do
plain="${word//$'\x1b'\[*([0-9;])m/}"
wl=$((${#plain} + 1))
if (((ll + wl) >= width)); then
printf "\n%${margin}s" ' '
ll=$wl
else
ll=$((ll + wl))
fi
printf '%s ' "$word"
done
printf '\n'
}
# use the exit code from less (see mklesskey) to do things
handle_keypress() { # handle_keypress CODE
case "$1" in
48) # o - open a link -- show a menu of links on the page
run select_url "$BOLLUX_PAGESRC"
;;
49) # g - goto a url -- input a new url
prompt GO
run blastoff -u "$REPLY"
;;
50) # [ - back in the history
run history_back || {
sleep 0.5
run blastoff "$BOLLUX_URL"
}
;;
51) # ] - forward in the history
run history_forward || {
sleep 0.5
run blastoff "$BOLLUX_URL"
}
;;
52) # r - re-request the current resource
run blastoff "$BOLLUX_URL"
;;
53) # G - goto a url (pre-filled with current)
prompt -u GO
run blastoff -u "$REPLY"
;;
*) # 54-57 -- still available for binding
die "$?" "less(1) error"
;;
esac
}
# select a URL from a text/gemini file
select_url() { # select_url FILE
run mapfile -t < <(extract_links <"$1")
PS3="OPEN> "
select u in "${MAPFILE[@]}"; do
case "$REPLY" in
q) bollux_quit ;;
[^0-9]*) run blastoff -u "$REPLY" && break ;;
esac
run blastoff "${u%%[[:space:]]*}" && break
done </dev/tty
}
# extract the links from a text/gemini file
extract_links() {
local url alt
while read -r; do
if [[ "$REPLY" =~ ^=\>[[:space:]]*([^[:space:]]+)([[:space:]]+(.*))?$ ]]; then
url="${BASH_REMATCH[1]}"
alt="${BASH_REMATCH[3]}"
if [[ "$alt" ]]; then
printf '%s \e[34m(%s)\e[0m\n' "$url" "$alt"
else
printf '%s\n' "$url"
fi
fi
done
}
# download $BOLLUX_URL
download() {
tn="$(mktemp)"
log x "Downloading: '$BOLLUX_URL' => '$tn'..."
dd status=progress >"$tn"
fn="$BOLLUX_DOWNDIR/${BOLLUX_URL##*/}"
if [[ -f "$fn" ]]; then
log x "Saved '$tn'."
elif mv "$tn" "$fn"; then
log x "Saved '$fn'."
else
log error "Error saving '$fn': downloaded to '$tn'."
fi
}
# initialize bollux
bollux_init() {
# Trap cleanup
trap bollux_cleanup INT QUIT EXIT
# State
REDIRECTS=0
set -f
# History
declare -a HISTORY # history is kept in an array
HN=0 # position of history in the array
run mkdir -p "${BOLLUX_HISTFILE%/*}"
}
# clean up on exit
bollux_cleanup() {
# Stubbed in case of need in future
:
}
# append a URL to history
history_append() { # history_append URL TITLE
BOLLUX_URL="$1"
# date/time, url, title (best guess)
run printf '%(%FT%T)T\t%s\t%s\n' -1 "$1" "$2" >>"$BOLLUX_HISTFILE"
HISTORY[$HN]="$BOLLUX_URL"
((HN += 1))
}
# move back in history (session)
history_back() {
log d "HN=$HN"
((HN -= 2))
if ((HN < 0)); then
HN=0
log e "Beginning of history."
return 1
fi
run blastoff "${HISTORY[$HN]}"
}
# move forward in history (session)
history_forward() {
log d "HN=$HN"
if ((HN >= ${#HISTORY[@]})); then
HN="${#HISTORY[@]}"
log e "End of history."
return 1
fi
run blastoff "${HISTORY[$HN]}"
}
if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then
run bollux "$@"
fi
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