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Added skeleton of new library functions.

Signed-off-by: Tony Tkacik <tonydamage@gmail.com>
This commit is contained in:
Tony Tkáčik 2017-06-19 16:02:26 +02:00
parent e7bb96f730
commit ff4e509d1c
4 changed files with 249 additions and 0 deletions

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inc/nux.cfg.inc.sh Normal file
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## #nux.cfg - NUX Script configuration management library
##
## #Public functions:
##
## nux.cfg.include [<app>] <config>
## Includes app specific configuration file.
##
function nux.cfg.include {
:
}
##
## nux.cfg.global.path [<path>]
## Returns global path., otherwise provides specified.
##
function nux.cfg.global.path {
:
}
function nux.cfg.list {
:
}

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## #nux.json NUX Script JSON Helper library
##
## #Public functions
## nux.json.start
## Starts operation on new JSON. Resets write operations stack and JSON
## source file to empty (useful for creating JSON from scratch.)
function nux.json.start {
nux_json_opstack=".";
nux_json_source="-n";
}
## nux.json.open <file>
## Opens JSON File for reading and writing using *nux.json.open* and
## *nux.json.write* commands.
##
## In order to work with empty JSON use *-n* as *file*. This allows
## for creating new JSON from scratch.
##
## NOTE: Open does not reset operation stack. To reset operation stack
## and opened file use *nux.json.start*
function nux.json.open {
local file="$1"
if [ -f $file ]; then
nux_json_source="$file"
fi
}
## nux.json.read <path>
## Reads *path* from currently opened JSON file.
## NOTE: Read does not see changes performed by *nux.json.write* unless
## these changes were flushed using *nux.json.flush*.
function nux.json.read {
local path=".$1";
jq -r "$path" "$nux_json_source";
}
## nux.json.write <path> <value>
## Adds write operation to action stack. Writes are not performed
## immediately, but rather when *nux.json.flush* is invoked.
## This allows for batching of operations or opting out of actually
## modifying file.
function nux.json.write {
local path=".$1";
local value="$2";
nux_json_opstack="${nux_json_opstack} | $path |= \"$value\""
}
## nux.json.flush [<target>]
## Flushes any write operations to specified *target* file.
## If *target* is not specified JSON is outputted to *STDIN*.
##
## NOTE: Flush does not reset operation stack. To reset
## operation stack and opened file use *nux.json.start*
##
function nux.json.flush {
local target="$1"
if [ -n "$target" ]; then
local write_target="$target";
if [ "$nux_json_source" == "$target" ]; then
write_target=$(mktemp $(dirname "$target")/tempXXXXXX.json)
fi
jq -r "$nux_json_opstack" "$nux_json_source" > "$write_target"
if [ "$nux_json_source" == "$target" ]; then
mv -f "$write_target" "$target"
fi
else
jq -r "$nux_json_opstack" "$nux_json_source"
fi
}
## nux.json.shorthands
## Exposes shorthands for writing and reading from JSON file.
## *njw* - nux.json.write
## *njr* - nux.json.read
##
function nux.json.shorthands {
function njw {
nux.json.write "$@"
}
function njr {
nux.json.read "$@"
}
}
## # Usage Notes
##
## ## Operation stack and flush
##
## As mentioned in documentation for *nux.json.flush* write stack
## is not removed, but rather kept alone, separatly from reference
## to open file. This allows for having modification template
## which could be executed on multiple files.
##
## The following example adds meta.author and meta.email
## to every JSON in directory.
##
## *nux.json.start*
## *nux.json.write* meta.author "Tony Tkacik"
## *nux.json.write* meta.email "example@example.com"
## *for* f *in* "*.json";
## *do*
## *nux.json.open* "$f"
## *nux.json.flush* "$f"
## *done*;
##
##

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## nux.repl.start <processor> [<prompt>] [<complete>]
## Starts NUX REPL
##
## FIXME: Add autocompletion
function nux.repl.start {
function .null() {
:
}
local processor=$1;
local prompt=${2:-.null};
local complete=$3;
local command=""
if nux.check.function $complete; then
bind -x '"\C-i": "nux.repl.completion $prompt $complete"' &> /dev/null
fi
while IFS=" " read -e -p "$($prompt)" options
do
history -s "$options" > /dev/null 2>&1
nux.log debug Readed line is: $nc_white$options$nc_end
command=$(echo $options | cut -d" " -f1)
arguments=${options#"$command"}
nux.log debug Command: $command, arguments: $arguments
case "$command" in
exit)
break;;
*)
$processor $command $arguments
;;
esac
done
}
## nux.repl.completion <prompt> <completion>
##
##
## This function is modified version of
## https://github.com/mchav/with/blob/master/with
function nux.repl.completion() {
local prompt=$1;
local compgen_command=$2;
shift;shift;
# print readline's prompt for visual separation
if [ "$#" -eq 0 ]; then
echo "$($prompt)$READLINE_LINE"
fi
pmpt=$($prompt)
# remove part after readline cursor from completion line
local completion_line completion_word
completion_line="${READLINE_LINE:0:READLINE_POINT}"
completion_word="${completion_line##* }"
# set completion cursor according to pmpt length
COMP_POINT=$((${#pmpt}+${#completion_line}+1))
COMP_WORDBREAKS="\n\"'><=;|&(:"
COMP_LINE="$pmpt $completion_line"
# TODO: the purpose of these variables is still unclear
# COMP_TYPE=63
# COMP_KEY=9
# get index of word to be completed
local whitespaces_count escaped_whitespaces_count
whitespaces_count=$(echo "$COMP_LINE" | grep -o ' ' | wc -l)
escaped_whitespaces_count=$(echo "$COMP_LINE" | grep -o '\\ ' | wc -l)
COMP_CWORD=$((whitespaces_count-escaped_whitespaces_count))
# get sourced completion command
local program_name complete_command
program_name=${COMP_WORDS[0]}
program_name=$(basename "$program_name")
complete_command=$(complete -p | grep " ${program_name}$")
COMPREPLY=()
COMPREPLY=($($compgen_command "$completion_line"))
# get commmon prefix of available completions
local completions_prefix readline_prefix readline_suffix
completions_prefix=$(printf "%s\n" "${COMPREPLY[@]}" | \
sed -e '$!{N;s/^\(.*\).*\n\1.*$/\1\n\1/;D;}' | xargs)
readline_prefix="${READLINE_LINE:0:READLINE_POINT}"
readline_suffix="${READLINE_LINE:READLINE_POINT}"
# remove the word to be completed
readline_prefix=$(sed s/'\w*$'// <(echo "$readline_prefix") | xargs)
READLINE_LINE=""
if [[ "$readline_prefix" != "" ]]; then
READLINE_LINE="$readline_prefix "
fi
READLINE_LINE="$READLINE_LINE$completions_prefix"
# adjust readline cursor position
READLINE_POINT=$((${#READLINE_LINE}+1))
if [[ "$readline_suffix" != "" ]]; then
READLINE_LINE="$READLINE_LINE $readline_suffix"
fi
local completions_count display_all
completions_count=${#COMPREPLY[@]}
display_all="y"
if [[ $completions_count -eq 1 ]]; then
READLINE_LINE=$(echo "$READLINE_LINE" | xargs)
READLINE_LINE="$READLINE_LINE "
return
elif [[ $completions_count -gt 80 ]]; then
echo -en "Display all $completions_count possibilities? (y or n) "
read -N 1 display_all
echo "$display_all"
fi
if [[ "$display_all" = "y" ]]; then
for completion in "${COMPREPLY[@]}"; do echo "$completion"; done | column
fi
}

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nux.use nux.fs