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rexec.sh
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rexec.sh
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#!/usr/bin/env bash
### ==============================================================================
### SO HOW DO YOU PROCEED WITH YOUR SCRIPT?
### 1. define the flags/options/parameters and defaults you need in Option:config()
### 2. implement the different actions in Script:main() with helper functions
### 3. implement helper functions you defined in previous step
### ==============================================================================
### Created by Peter Forret ( pforret ) on 2022-10-24
### Based on https://github.com/pforret/bashew 1.19.0
script_version="0.0.1" # if there is a VERSION.md in this script's folder, it will take priority for version number
readonly script_author="peter@forret.com"
readonly script_created="2022-10-24"
readonly run_as_root=-1 # run_as_root: 0 = don't check anything / 1 = script MUST run as root / -1 = script MAY NOT run as root
## some initialisation
action=""
script_prefix=""
script_basename=""
install_package=""
temp_files=()
function Option:config() {
### Change the next lines to reflect which flags/options/parameters you need
### flag: switch a flag 'on' / no value specified
### flag|<short>|<long>|<description>
### e.g. "-v" or "--verbose" for verbose output / default is always 'off'
### will be available as $<long> in the script e.g. $verbose
### option: set an option / 1 value specified
### option|<short>|<long>|<description>|<default>
### e.g. "-e <extension>" or "--extension <extension>" for a file extension
### will be available a $<long> in the script e.g. $extension
### list: add an list/array item / 1 value specified
### list|<short>|<long>|<description>| (default is ignored)
### e.g. "-u <user1> -u <user2>" or "--user <user1> --user <user2>"
### will be available a $<long> array in the script e.g. ${user[@]}
### param: comes after the options
### param|<type>|<long>|<description>
### <type> = 1 for single parameters - e.g. param|1|output expects 1 parameter <output>
### <type> = ? for optional parameters - e.g. param|1|output expects 1 parameter <output>
### <type> = n for list parameter - e.g. param|n|inputs expects <input1> <input2> ... <input99>
### will be available as $<long> in the script after option/param parsing
### choice: is like a param, but when there are limited options
### choice|<type>|<long>|<description>|choice1,choice2,...
### <type> = 1 for single parameters - e.g. param|1|output expects 1 parameter <output>
<<< "
#commented lines will be filtered
flag|h|help|show usage
flag|q|quiet|no output
flag|v|verbose|also show debug messages
flag|f|force|do not ask for confirmation (always yes)
flag|d|diff|diff the change in output instead of just showing the new output
flag|e|erase|erase last output (first call always shows up)
option|l|log_dir|folder for log files |$HOME/log/$script_prefix
option|t|tmp_dir|folder for temp files|/tmp/$script_prefix
option|n|number|number of times to repeat the command|1000
option|w|wait|seconds to wait between repeating the command|5
choice|1|action|action to perform|run,file,check,env,update
param|?|command|command to repeat
" grep -v -e '^#' -e '^\s*$'
}
#####################################################################
## Put your Script:main script here
#####################################################################
Script:main() {
IO:log "[$script_basename] $script_version started"
Os:require "awk"
Os:require "diff"
action=$(Str:lower "$action")
case $action in
run)
#TIP: use «$script_prefix run» to wait until the output of a command changes
#TIP:> $script_prefix run "nslookup www.newdomain.com"
do_run
;;
file)
#TIP: use «$script_prefix file» to wait until file contents changes
#TIP:> $script_prefix file /var/log/errors.log
do_file
;;
check | env)
## leave this default action, it will make it easier to test your script
#TIP: use «$script_prefix check» to check if this script is ready to execute and what values the options/flags are
#TIP:> $script_prefix check
#TIP: use «$script_prefix env» to generate an example .env file
#TIP:> $script_prefix env > .env
Script:check
;;
update)
## leave this default action, it will make it easier to test your script
#TIP: use «$script_prefix update» to update to the latest version
#TIP:> $script_prefix update
Script:git_pull
;;
*)
IO:die "action [$action] not recognized"
;;
esac
IO:log "[$script_basename] ended after $SECONDS secs"
#TIP: >>> bash script created with «pforret/bashew»
#TIP: >>> for bash development, also check IO:print «pforret/setver» and «pforret/IO:progressbar»
}
#####################################################################
## Put your helper scripts here
#####################################################################
do_run() {
# shellcheck disable=SC2154
IO:log "run [$command]"
i=0
# shellcheck disable=SC2154
user=$(whoami)
id=$(echo "$user@$HOSTNAME $command" | Str:digest 10)
IO:debug "ID for this command: $id"
# shellcheck disable=SC2154
tmp_output="$tmp_dir/$script_prefix.$id.compare.txt"
# shellcheck disable=SC2154
[[ $erase -gt 0 ]] && rm -f "$tmp_output"
[[ ! -f "$tmp_output" ]] && touch "$tmp_output"
hash_output=$(< "$tmp_output" Str:digest 16)
tmp_latest="$tmp_dir/$script_prefix.$id.latest.txt"
# shellcheck disable=SC2154
while [[ $i -lt $number ]] ; do
i=$((i + 1))
IO:progress "Run [$command] (#$i/$number @ $SECONDS secs)"
eval "$command &> '$tmp_latest'"
hash_latest=$(< "$tmp_latest" Str:digest 16)
if [[ ! "$hash_latest" == "$hash_output" ]] ; then
tput bel
echo " "
IO:success "### Output changed at $(date)"
if [[ $diff -eq 0 ]] ; then
IO:success "### NEW OUTPUT"
cat "$tmp_latest"
else
IO:success "### OUTPUT DIFF"
diff "$tmp_latest" "$tmp_output"
fi
IO:success "###"
cp "$tmp_latest" "$tmp_output"
hash_output="$hash_latest"
fi
IO:progress "Ran [$command] (#$i/$number @ $SECONDS secs) - wait $wait seconds"
sleep "$wait"
done
}
do_file() {
i=0
user=$(whoami)
# shellcheck disable=SC2154
file="$command"
IO:log "file [$file]"
id=$(echo "$user@$HOSTNAME $file" | Str:digest 10)
IO:debug "ID for this file: $id"
tmp_output="$tmp_dir/$script_prefix.$id.compare.txt"
# shellcheck disable=SC2154
[[ $erase -gt 0 ]] && rm -f "$tmp_output"
[[ ! -f "$tmp_output" ]] && cp "$file" "$tmp_output"
hash_output=$(< "$tmp_output" Str:digest 16)
# shellcheck disable=SC2154
while [[ $i -lt $number ]] ; do
i=$((i + 1))
IO:progress "Check [$file] (#$i/$number @ $SECONDS secs)"
hash_latest=$(< "$file" Str:digest 16)
if [[ ! "$hash_latest" == "$hash_output" ]] ; then
tput bel
echo " "
IO:success "### File changed at $(date)"
if [[ $diff -eq 0 ]] ; then
IO:success "### NEW FILE"
cat "$file"
else
IO:success "### FILE DIFF"
diff "$file" "$tmp_output"
fi
IO:success "###"
cp "$file" "$tmp_output"
hash_output="$hash_latest"
fi
IO:progress "Check [$command] (#$i/$number @ $SECONDS secs) - wait $wait seconds"
sleep "$wait"
done
}
#####################################################################
################### DO NOT MODIFY BELOW THIS LINE ###################
#####################################################################
# set strict mode - via http://redsymbol.net/articles/unofficial-bash-strict-mode/
# removed -e because it made basic [[ testing ]] difficult
set -uo pipefail
IFS=$'\n\t'
force=0
help=0
error_prefix=""
#to enable verbose even before option parsing
verbose=0
[[ $# -gt 0 ]] && [[ $1 == "-v" ]] && verbose=1
#to enable quiet even before option parsing
quiet=0
[[ $# -gt 0 ]] && [[ $1 == "-q" ]] && quiet=1
### stdIO:print/stderr output
function IO:initialize() {
[[ "${BASH_SOURCE[0]:-}" != "${0}" ]] && sourced=1 || sourced=0
[[ -t 1 ]] && piped=0 || piped=1 # detect if output is piped
if [[ $piped -eq 0 ]]; then
txtReset=$(tput sgr0)
txtError=$(tput setaf 160)
txtInfo=$(tput setaf 2)
txtWarn=$(tput setaf 214)
txtBold=$(tput bold)
txtItalic=$(tput sitm)
txtUnderline=$(tput smul)
else
txtReset=""
txtError=""
txtInfo=""
txtInfo=""
txtWarn=""
txtBold=""
txtItalic=""
txtUnderline=""
fi
[[ $(echo -e '\xe2\x82\xac') == '€' ]] && unicode=1 || unicode=0 # detect if unicode is supported
if [[ $unicode -gt 0 ]]; then
char_succes="✅"
char_fail="⛔"
char_alert="✴️"
char_wait="⏳"
info_icon="🌼"
config_icon="🌱"
clean_icon="🧽"
require_icon="🔌"
else
char_succes="OK "
char_fail="!! "
char_alert="?? "
char_wait="..."
info_icon="(i)"
config_icon="[c]"
clean_icon="[c]"
require_icon="[r]"
fi
error_prefix="${txtError}>${txtReset}"
}
function IO:print() {
((quiet)) && true || printf '%b\n' "$*"
}
function IO:debug() {
((verbose)) && IO:print "${txtInfo}# $* ${txtReset}" >&2
true
}
function IO:die() {
IO:print "${txtError}${char_fail} $script_basename${txtReset}: $*" >&2
tput bel
Script:exit
}
function IO:alert() {
IO:print "${txtWarn}${char_alert}${txtReset}: ${txtUnderline}$*${txtReset}" >&2
}
function IO:success() {
IO:print "${txtInfo}${char_succes}${txtReset} ${txtBold}$*${txtReset}"
}
function IO:announce() {
IO:print "${txtInfo}${char_wait}${txtReset} ${txtItalic}$*${txtReset}"
sleep 1
}
function IO:progress() {
((quiet)) || (
local screen_width
screen_width=$(tput cols 2>/dev/null || echo 80)
local rest_of_line
rest_of_line=$((screen_width - 5))
if ((piped)); then
IO:print "... $*" >&2
else
printf "... %-${rest_of_line}b\r" "$* " >&2
fi
)
}
function IO:countdown(){
local seconds=${1:-5}
local message=${2:-Countdown :}
if ((piped)); then
IO:print "$message $seconds seconds"
else
for (( i = 0; i < "$seconds"; i++ )); do
IO:progress "${txtInfo}$message $((seconds - i)) seconds${txtReset}"
sleep 1
done
IO:print " "
fi
}
### interactive
function IO:confirm() {
((force)) && return 0
read -r -p "$1 [y/N] " -n 1
echo " "
[[ $REPLY =~ ^[Yy]$ ]]
}
function IO:question() {
local ANSWER
local DEFAULT=${2:-}
read -r -p "$1 ($DEFAULT) > " ANSWER
[[ -z "$ANSWER" ]] && echo "$DEFAULT" || echo "$ANSWER"
}
function IO:log() {
[[ -n "${log_file:-}" ]] && echo "$(date '+%H:%M:%S') | $*" >> "$log_file"
}
function Tool:calc() {
awk "BEGIN {print $*} ; "
}
function Tool:time() {
if [[ $(command -v perl) ]]; then
perl -MTime::HiRes=time -e 'printf "%.3f\n", time'
elif [[ $(command -v php) ]]; then
php -r 'echo microtime(true) . "\n"; '
elif [[ $(command -v python) ]] ; then
python -c "import time; print(time.time()) "
else
date "+%s" | awk '{printf("%.3f\n",$1)}'
fi
}
### string processing
function Str:trim() {
local var="$*"
# remove leading whitespace characters
var="${var#"${var%%[![:space:]]*}"}"
# remove trailing whitespace characters
var="${var%"${var##*[![:space:]]}"}"
printf '%s' "$var"
}
function Str:lower() {
if [[ -n "$1" ]] ; then
local input="$*"
echo "${input,,}"
else
awk '{print tolower($0)}'
fi
}
function Str:upper() {
if [[ -n "$1" ]] ; then
local input="$*"
echo "${input^^}"
else
awk '{print toupper($0)}'
fi
}
function Str:ascii() {
# remove all characters with accents/diacritics to latin alphabet
# shellcheck disable=SC2020
sed 'y/àáâäæãåāǎçćčèéêëēėęěîïííīįìǐłñńôöòóœøōǒõßśšûüǔùǖǘǚǜúūÿžźżÀÁÂÄÆÃÅĀǍÇĆČÈÉÊËĒĖĘĚÎÏÍÍĪĮÌǏŁÑŃÔÖÒÓŒØŌǑÕẞŚŠÛÜǓÙǕǗǙǛÚŪŸŽŹŻ/aaaaaaaaaccceeeeeeeeiiiiiiiilnnooooooooosssuuuuuuuuuuyzzzAAAAAAAAACCCEEEEEEEEIIIIIIIILNNOOOOOOOOOSSSUUUUUUUUUUYZZZ/'
}
function Str:slugify() {
# Str:slugify <input> <separator>
# Str:slugify "Jack, Jill & Clémence LTD" => jack-jill-clemence-ltd
# Str:slugify "Jack, Jill & Clémence LTD" "_" => jack_jill_clemence_ltd
separator="${2:-}"
[[ -z "$separator" ]] && separator="-"
Str:lower "$1" |
Str:ascii |
awk '{
gsub(/[\[\]@#$%^&*;,.:()<>!?\/+=_]/," ",$0);
gsub(/^ */,"",$0);
gsub(/ *$/,"",$0);
gsub(/ */,"-",$0);
gsub(/[^a-z0-9\-]/,"");
print;
}' |
sed "s/-/$separator/g"
}
function Str:title() {
# Str:title <input> <separator>
# Str:title "Jack, Jill & Clémence LTD" => JackJillClemenceLtd
# Str:title "Jack, Jill & Clémence LTD" "_" => Jack_Jill_Clemence_Ltd
separator="${2:-}"
# shellcheck disable=SC2020
Str:lower "$1" |
tr 'àáâäæãåāçćčèéêëēėęîïííīįìłñńôöòóœøōõßśšûüùúūÿžźż' 'aaaaaaaaccceeeeeeeiiiiiiilnnoooooooosssuuuuuyzzz' |
awk '{ gsub(/[\[\]@#$%^&*;,.:()<>!?\/+=_-]/," ",$0); print $0; }' |
awk '{
for (i=1; i<=NF; ++i) {
$i = toupper(substr($i,1,1)) tolower(substr($i,2))
};
print $0;
}' |
sed "s/ /$separator/g" |
cut -c1-50
}
function Str:digest() {
local length=${1:-6}
if [[ -n $(command -v md5sum) ]]; then
# regular linux
md5sum | cut -c1-"$length"
else
# macos
md5 | cut -c1-"$length"
fi
}
# Gha: function should only be run inside of a Github Action
function Gha:finish(){
[[ -z "${RUNNER_OS:-}" ]] && IO:die "This should only run inside a Github Action, don't run it on your machine"
git config user.name "Bashew Runner"
git config user.email "actions@users.noreply.github.com"
timestamp=$(date -u)
message="$timestamp < $script_basename $script_version"
git add -A
git commit -m "${message}" || exit 0
git pull --rebase
git push
exit 0
}
trap "IO:die \"ERROR \$? after \$SECONDS seconds \n\
\${error_prefix} last command : '\$BASH_COMMAND' \" \
\$(< \$script_install_path awk -v lineno=\$LINENO \
'NR == lineno {print \"\${error_prefix} from line \" lineno \" : \" \$0}')" INT TERM EXIT
# cf https://askubuntu.com/questions/513932/what-is-the-bash-command-variable-good-for
Script:exit() {
for temp_file in "${temp_files[@]-}" ; do
[[ -f "$temp_file" ]] && (
IO:debug "Delete temp file [$temp_file]"
rm -f "$temp_file"
)
done
trap - INT TERM EXIT
IO:debug "$script_basename finished after $SECONDS seconds"
exit 0
}
Script:check_version() {
(
# shellcheck disable=SC2164
pushd "$script_install_folder" &>/dev/null
if [[ -d .git ]]; then
local remote
remote="$(git remote -v | grep fetch | awk 'NR == 1 {print $2}')"
IO:progress "Check for latest version - $remote"
git remote update &>/dev/null
if [[ $(git rev-list --count "HEAD...HEAD@{upstream}" 2>/dev/null) -gt 0 ]]; then
IO:print "There is a more recent update of this script - run <<$script_prefix update>> to update"
fi
fi
# shellcheck disable=SC2164
popd &>/dev/null
)
}
Script:git_pull() {
# run in background to avoid problems with modifying a running interpreted script
(
sleep 1
cd "$script_install_folder" && git pull
) &
}
Script:show_tips() {
((sourced)) && return 0
# shellcheck disable=SC2016
grep <"${BASH_SOURCE[0]}" -v '$0' |
awk \
-v green="$txtInfo" \
-v yellow="$txtWarn" \
-v reset="$txtReset" \
'
/TIP: / {$1=""; gsub(/«/,green); gsub(/»/,reset); print "*" $0}
/TIP:> / {$1=""; print " " yellow $0 reset}
' |
awk \
-v script_basename="$script_basename" \
-v script_prefix="$script_prefix" \
'{
gsub(/\$script_basename/,script_basename);
gsub(/\$script_prefix/,script_prefix);
print ;
}'
}
Script:check() {
local name
if [[ -n $(Option:filter flag) ]]; then
IO:print "## ${txtInfo}boolean flags${txtReset}:"
Option:filter flag |
while read -r name; do
if ((piped)); then
eval "echo \"$name=\$${name:-}\""
else
eval "echo -n \"$name=\$${name:-} \""
fi
done
IO:print " "
IO:print " "
fi
if [[ -n $(Option:filter option) ]]; then
IO:print "## ${txtInfo}option defaults${txtReset}:"
Option:filter option |
while read -r name; do
if ((piped)); then
eval "echo \"$name=\$${name:-}\""
else
eval "echo -n \"$name=\$${name:-} \""
fi
done
IO:print " "
IO:print " "
fi
if [[ -n $(Option:filter list) ]]; then
IO:print "## ${txtInfo}list options${txtReset}:"
Option:filter list |
while read -r name; do
if ((piped)); then
eval "echo \"$name=(\${${name}[@]})\""
else
eval "echo -n \"$name=(\${${name}[@]}) \""
fi
done
IO:print " "
IO:print " "
fi
if [[ -n $(Option:filter param) ]]; then
if ((piped)); then
IO:debug "Skip parameters for .env files"
else
IO:print "## ${txtInfo}parameters${txtReset}:"
Option:filter param |
while read -r name; do
# shellcheck disable=SC2015
((piped)) && eval "echo \"$name=\\\"\${$name:-}\\\"\"" || eval "echo -n \"$name=\\\"\${$name:-}\\\" \""
done
echo " "
fi
IO:print " "
fi
if [[ -n $(Option:filter choice) ]]; then
if ((piped)); then
IO:debug "Skip choices for .env files"
else
IO:print "## ${txtInfo}choice${txtReset}:"
Option:filter choice |
while read -r name; do
# shellcheck disable=SC2015
((piped)) && eval "echo \"$name=\\\"\${$name:-}\\\"\"" || eval "echo -n \"$name=\\\"\${$name:-}\\\" \""
done
echo " "
fi
IO:print " "
fi
IO:print "## ${txtInfo}required commands${txtReset}:"
Script:show_required
}
Option:usage() {
IO:print "Program : ${txtInfo}$script_basename${txtReset} by ${txtWarn}$script_author${txtReset}"
IO:print "Version : ${txtInfo}v$script_version${txtReset} (${txtWarn}$script_modified${txtReset})"
IO:print "Purpose : ${txtInfo}repeat a command until the output changes${txtReset}"
echo -n "Usage : $script_basename"
Option:config |
awk '
BEGIN { FS="|"; OFS=" "; oneline="" ; fulltext="Flags, options and parameters:"}
$1 ~ /flag/ {
fulltext = fulltext sprintf("\n -%1s|--%-12s: [flag] %s [default: off]",$2,$3,$4) ;
oneline = oneline " [-" $2 "]"
}
$1 ~ /option/ {
fulltext = fulltext sprintf("\n -%1s|--%-12s: [option] %s",$2,$3 " <?>",$4) ;
if($5!=""){fulltext = fulltext " [default: " $5 "]"; }
oneline = oneline " [-" $2 " <" $3 ">]"
}
$1 ~ /list/ {
fulltext = fulltext sprintf("\n -%1s|--%-12s: [list] %s (array)",$2,$3 " <?>",$4) ;
fulltext = fulltext " [default empty]";
oneline = oneline " [-" $2 " <" $3 ">]"
}
$1 ~ /secret/ {
fulltext = fulltext sprintf("\n -%1s|--%s <%s>: [secret] %s",$2,$3,"?",$4) ;
oneline = oneline " [-" $2 " <" $3 ">]"
}
$1 ~ /param/ {
if($2 == "1"){
fulltext = fulltext sprintf("\n %-17s: [parameter] %s","<"$3">",$4);
oneline = oneline " <" $3 ">"
}
if($2 == "?"){
fulltext = fulltext sprintf("\n %-17s: [parameter] %s (optional)","<"$3">",$4);
oneline = oneline " <" $3 "?>"
}
if($2 == "n"){
fulltext = fulltext sprintf("\n %-17s: [parameters] %s (1 or more)","<"$3">",$4);
oneline = oneline " <" $3 " …>"
}
}
$1 ~ /choice/ {
fulltext = fulltext sprintf("\n %-17s: [choice] %s","<"$3">",$4);
if($5!=""){fulltext = fulltext " [options: " $5 "]"; }
oneline = oneline " <" $3 ">"
}
END {print oneline; print fulltext}
'
}
function Option:filter() {
Option:config | grep "$1|" | cut -d'|' -f3 | sort | grep -v '^\s*$'
}
function Script:show_required() {
grep 'Os:require' "$script_install_path" |
grep -v -E '\(\)|grep|# Os:require' |
awk -v install="# $install_package " '
function ltrim(s) { sub(/^[ "\t\r\n]+/, "", s); return s }
function rtrim(s) { sub(/[ "\t\r\n]+$/, "", s); return s }
function trim(s) { return rtrim(ltrim(s)); }
NF == 2 {print install trim($2); }
NF == 3 {print install trim($3); }
NF > 3 {$1=""; $2=""; $0=trim($0); print "# " trim($0);}
' |
sort -u
}
function Option:initialize() {
local init_command
init_command=$(Option:config |
grep -v "verbose|" |
awk '
BEGIN { FS="|"; OFS=" ";}
$1 ~ /flag/ && $5 == "" {print $3 "=0; "}
$1 ~ /flag/ && $5 != "" {print $3 "=\"" $5 "\"; "}
$1 ~ /option/ && $5 == "" {print $3 "=\"\"; "}
$1 ~ /option/ && $5 != "" {print $3 "=\"" $5 "\"; "}
$1 ~ /choice/ {print $3 "=\"\"; "}
$1 ~ /list/ {print $3 "=(); "}
$1 ~ /secret/ {print $3 "=\"\"; "}
')
if [[ -n "$init_command" ]]; then
eval "$init_command"
fi
}
function Option:has_single() { Option:config | grep 'param|1|' >/dev/null; }
function Option:has_choice() { Option:config | grep 'choice|1' >/dev/null; }
function Option:has_optional() { Option:config | grep 'param|?|' >/dev/null; }
function Option:has_multi() { Option:config | grep 'param|n|' >/dev/null; }
function Option:parse() {
if [[ $# -eq 0 ]]; then
Option:usage >&2
Script:exit
fi
## first process all the -x --xxxx flags and options
while true; do
# flag <flag> is saved as $flag = 0/1
# option <option> is saved as $option
if [[ $# -eq 0 ]]; then
## all parameters processed
break
fi
if [[ ! $1 == -?* ]]; then
## all flags/options processed
break
fi
local save_option
save_option=$(Option:config |
awk -v opt="$1" '
BEGIN { FS="|"; OFS=" ";}
$1 ~ /flag/ && "-"$2 == opt {print $3"=1"}
$1 ~ /flag/ && "--"$3 == opt {print $3"=1"}
$1 ~ /option/ && "-"$2 == opt {print $3"=$2; shift"}
$1 ~ /option/ && "--"$3 == opt {print $3"=$2; shift"}
$1 ~ /list/ && "-"$2 == opt {print $3"+=($2); shift"}
$1 ~ /list/ && "--"$3 == opt {print $3"=($2); shift"}
$1 ~ /secret/ && "-"$2 == opt {print $3"=$2; shift #noshow"}
$1 ~ /secret/ && "--"$3 == opt {print $3"=$2; shift #noshow"}
')
if [[ -n "$save_option" ]]; then
if echo "$save_option" | grep shift >>/dev/null; then
local save_var
save_var=$(echo "$save_option" | cut -d= -f1)
IO:debug "$config_icon parameter: ${save_var}=$2"
else
IO:debug "$config_icon flag: $save_option"
fi
eval "$save_option"
else
IO:die "cannot interpret option [$1]"
fi
shift
done
((help)) && (
Option:usage
Script:check_version
IO:print " "
echo "### TIPS & EXAMPLES"
Script:show_tips
) && Script:exit
local option_list
local option_count
local choices
local single_params
## then run through the given parameters
if Option:has_choice; then
choices=$(Option:config | awk -F"|" '
$1 == "choice" && $2 == 1 {print $3}
')
option_list=$(<<< "$choices" xargs)
option_count=$(<<< "$choices" wc -w | xargs)
IO:debug "$config_icon Expect : $option_count choice(s): $option_list"
[[ $# -eq 0 ]] && IO:die "need the choice(s) [$option_list]"
local choices_list
local valid_choice
for param in $choices; do
[[ $# -eq 0 ]] && IO:die "need choice [$param]"
[[ -z "$1" ]] && IO:die "need choice [$param]"
IO:debug "$config_icon Assign : $param=$1"
# check if choice is in list
choices_list=$(Option:config | awk -F"|" -v choice="$param" '$1 == "choice" && $3 = choice {print $5}')
valid_choice=$(<<< "$choices_list" tr "," "\n" | grep "$1")
[[ -z "$valid_choice" ]] && IO:die "choice [$1] is not valid, should be in list [$choices_list]"
eval "$param=\"$1\""
shift
done
else
IO:debug "$config_icon No choices to process"
choices=""
option_count=0
fi
if Option:has_single; then
single_params=$(Option:config | awk -F"|" '
$1 == "param" && $2 == 1 {print $3}
')
option_list=$(<<< "$single_params" xargs)
option_count=$(<<< "$single_params" wc -w | xargs)
IO:debug "$config_icon Expect : $option_count single parameter(s): $option_list"
[[ $# -eq 0 ]] && IO:die "need the parameter(s) [$option_list]"
for param in $single_params; do
[[ $# -eq 0 ]] && IO:die "need parameter [$param]"
[[ -z "$1" ]] && IO:die "need parameter [$param]"
IO:debug "$config_icon Assign : $param=$1"
eval "$param=\"$1\""
shift
done
else
IO:debug "$config_icon No single params to process"
single_params=""
option_count=0
fi
if Option:has_optional; then
local optional_params
local optional_count
optional_params=$(Option:config | grep 'param|?|' | cut -d'|' -f3)
optional_count=$(<<< "$optional_params" wc -w | xargs)
IO:debug "$config_icon Expect : $optional_count optional parameter(s): $(echo "$optional_params" | xargs)"
for param in $optional_params; do
IO:debug "$config_icon Assign : $param=${1:-}"
eval "$param=\"${1:-}\""
shift
done
else
IO:debug "$config_icon No optional params to process"
optional_params=""
optional_count=0
fi
if Option:has_multi; then
#IO:debug "Process: multi param"
local multi_count
local multi_param
multi_count=$(Option:config | grep -c 'param|n|')
multi_param=$(Option:config | grep 'param|n|' | cut -d'|' -f3)
IO:debug "$config_icon Expect : $multi_count multi parameter: $multi_param"
((multi_count > 1)) && IO:die "cannot have >1 'multi' parameter: [$multi_param]"
((multi_count > 0)) && [[ $# -eq 0 ]] && IO:die "need the (multi) parameter [$multi_param]"
# save the rest of the params in the multi param
if [[ -n "$*" ]]; then
IO:debug "$config_icon Assign : $multi_param=$*"
eval "$multi_param=( $* )"
fi
else
multi_count=0
multi_param=""
[[ $# -gt 0 ]] && IO:die "cannot interpret extra parameters"
fi
}
function Os:require() {
local install_instructions
local binary
local words
local path_binary
# $1 = binary that is required
binary="$1"
path_binary=$(command -v "$binary" 2>/dev/null)
[[ -n "$path_binary" ]] && IO:debug "️$require_icon required [$binary] -> $path_binary" && return 0
# $2 = how to install it
words=$(echo "${2:-}" | wc -w)
if ((force)); then
IO:announce "Installing [$1] ..."
case $words in
0) eval "$install_package $1" ;;
# Os:require ffmpeg -- binary and package have the same name
1) eval "$install_package $2" ;;
# Os:require convert imagemagick -- binary and package have different names
*) eval "${2:-}" ;;
# Os:require primitive "go get -u github.com/fogleman/primitive" -- non-standard package manager
esac
else
install_instructions="$install_package $1"
[[ $words -eq 1 ]] && install_instructions="$install_package $2"
[[ $words -gt 1 ]] && install_instructions="${2:-}"
IO:alert "$script_basename needs [$binary] but it cannot be found"
IO:alert "1) install package : $install_instructions"
IO:alert "2) check path : export PATH=\"[path of your binary]:\$PATH\""
IO:die "Missing program/script [$binary]"
fi
}
function Os:folder() {
if [[ -n "$1" ]]; then
local folder="$1"
local max_days=${2:-365}
if [[ ! -d "$folder" ]]; then
IO:debug "$clean_icon Create folder : [$folder]"
mkdir -p "$folder"
else
IO:debug "$clean_icon Cleanup folder: [$folder] - delete files older than $max_days day(s)"
find "$folder" -mtime "+$max_days" -type f -exec rm {} \;
fi
fi
}
function Os:follow_link() {
[[ ! -L "$1" ]] && echo "$1" && return 0
local file_folder
local link_folder
local link_name
file_folder="$(dirname "$1")"
# resolve relative to absolute path
[[ "$file_folder" != /* ]] && link_folder="$(cd -P "$file_folder" &>/dev/null && pwd)"
local symlink
symlink=$(readlink "$1")
link_folder=$(dirname "$symlink")
link_name=$(basename "$symlink")
[[ -z "$link_folder" ]] && link_folder="$file_folder"
[[ "$link_folder" == \.* ]] && link_folder="$(cd -P "$file_folder" && cd -P "$link_folder" &>/dev/null && pwd)"
IO:debug "$info_icon Symbolic ln: $1 -> [$symlink]"
Os:follow_link "$link_folder/$link_name"
}
function Os:notify(){
# cf https://levelup.gitconnected.com/5-modern-bash-scripting-techniques-that-only-a-few-programmers-know-4abb58ddadad
local message="$1"
local source="${2:-$script_basename}"
[[ -n $(command -v notify-send) ]] && notify-send "$source" "$message" # for Linux
[[ -n $(command -v osascript) ]] && osascript -e "display notification \"$message\" with title \"$source\"" # for MacOS
}
function Os:busy(){
# show spinner as long as process $pid is running
local pid="$1"
local message="${2:-}"
local frames=( "|" "/" "-" "\\" )
(
while kill -0 "$pid" &> /dev/null;
do
for frame in "${frames[@]}";
do
printf "\r[ $frame ] %s..." "$message"
sleep 0.5
done
done
printf "\n"
)
}
function Os:beep(){
local type="${1=-info}"
case $type in
*)
tput bel
esac
}
function Script:meta() {
git_repo_remote=""
git_repo_root=""
os_kernel=""
os_machine=""
os_name=""
os_version=""
script_hash="?"
script_lines="?"
shell_brand=""
shell_version=""
script_prefix=$(basename "${BASH_SOURCE[0]}" .sh)
script_basename=$(basename "${BASH_SOURCE[0]}")
execution_day=$(date "+%Y-%m-%d")
script_install_path="${BASH_SOURCE[0]}"
IO:debug "$info_icon Script path: $script_install_path"
script_install_path=$(Os:follow_link "$script_install_path")
IO:debug "$info_icon Linked path: $script_install_path"
script_install_folder="$(cd -P "$(dirname "$script_install_path")" && pwd)"
IO:debug "$info_icon In folder : $script_install_folder"
if [[ -f "$script_install_path" ]]; then
script_hash=$(Str:digest <"$script_install_path" 8)
script_lines=$(awk <"$script_install_path" 'END {print NR}')
fi
# get shell/operating system/versions
shell_brand="sh"
shell_version="?"
[[ -n "${ZSH_VERSION:-}" ]] && shell_brand="zsh" && shell_version="$ZSH_VERSION"
[[ -n "${BASH_VERSION:-}" ]] && shell_brand="bash" && shell_version="$BASH_VERSION"
[[ -n "${FISH_VERSION:-}" ]] && shell_brand="fish" && shell_version="$FISH_VERSION"
[[ -n "${KSH_VERSION:-}" ]] && shell_brand="ksh" && shell_version="$KSH_VERSION"
IO:debug "$info_icon Shell type : $shell_brand - version $shell_version"
os_kernel=$(uname -s)
os_version=$(uname -r)
os_machine=$(uname -m)
install_package=""
case "$os_kernel" in
CYGWIN* | MSYS* | MINGW*)
os_name="Windows"
;;
Darwin)
os_name=$(sw_vers -productName) # macOS
os_version=$(sw_vers -productVersion) # 11.1
install_package="brew install"
;;
Linux | GNU*)
if [[ $(command -v lsb_release) ]]; then
# 'normal' Linux distributions
os_name=$(lsb_release -i | awk -F: '{$1=""; gsub(/^[\s\t]+/,"",$2); gsub(/[\s\t]+$/,"",$2); print $2}') # Ubuntu/Raspbian
os_version=$(lsb_release -r | awk -F: '{$1=""; gsub(/^[\s\t]+/,"",$2); gsub(/[\s\t]+$/,"",$2); print $2}') # 20.04
else
# Synology, QNAP,
os_name="Linux"
fi
[[ -x /bin/apt-cyg ]] && install_package="apt-cyg install" # Cygwin
[[ -x /bin/dpkg ]] && install_package="dpkg -i" # Synology
[[ -x /opt/bin/ipkg ]] && install_package="ipkg install" # Synology