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vns/vns.sh

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#!/bin/bash
XL_PRODUCT="Vim Note System"
XL_VER="1.0a2"
# Environment Constants
readonly VNS_STORE="$HOME/.local/vns"
readonly VNS_KEYFILE="$VNS_STORE/.pubkey"
readonly IFS=$'\n\t'
set -euo pipefail
readonly VNS_RED_COLOR='\033[1;31m'
readonly VNS_YELLOW_COLOR='\033[1;33m'
readonly VNS_RESET_COLOR='\033[0m'
# Erroneous Exit Constants
# Invocation Errors
readonly VNS_ERR_NO_STORE=5 # The vns store needs to be initialized
readonly VNS_ERR_NO_OPTS=10 # No mode argument was specified
readonly VNS_ERR_NS_ARGS=11 # The specified mode requires an argument
readonly VNS_ERR_NO_EDTR=15 # No editor specified in environment
# Dependency Errors
readonly VNS_ERR_DEPS=20 # Base error - add the following codes
readonly VNS_ERR_NO_gpg2=1 # GPG is not installed
readonly VNS_ERR_NO_tree=2 # Tree is not installed
readonly VNS_ERR_NO_git=3 # Git is not installed
# Global Variables
typeset -a VNS_ACTION=("")
typeset -a MISSING_DEPS
typeset -i VNS_EXIT=0
declare VNS_PUBKEY=
# Function Definitions
# vns_index Print the $1th index of array ${2[@]} (friendly to -euo)
# vns_printError Prints an error message
# vns_NoteHeader Prints standard note header to stdout
# vns_checkDeps Checks the system for required dependencies
# vns_checkStore Checks if $VNS_STORE exists
# vns_sanityCheck Wrapper for vns_checkDeps and vns_checkStore
# ----
# vns_initStore Initializes the VNS Store ( -i)
# vns_printHelp Prints help page ( -h)
# vns_list Lists all notes in `tree` format ( *)
# vns_create Creates note; calls vns_edit() ( -c)
# vns_edit Decrypts note to /tmp, calls editor, re-encrypts note ( -e)
# vns_print Prints note to stdout ( -p)
# vns_rm Deletes note from store ( -d)
# vns_gitPassthrough Passes through all instructions to git (git)
function vns_index(){
echo "$@" | awk -v i="$(($1+1))" '{print $i}'
}
function vns_printError(){
printf "$VNS_RED_COLOR!$VNS_RESET_COLOR - %s\n" "$@"
}
function vns_NoteHeader(){
printf "%s\n%s\n" "Title:" "Date:"
}
function vns_checkDeps(){
local VNS_RETURN="true";
for DEP in "${VNS_DEPS[@]}"; do
if test ! -e "$(which "$DEP" 2>/dev/null)"; then
MISSING_DEPS+=("$DEP")
VNS_RETURN="false";
fi
done
"$VNS_RETURN";
}
function vns_checkStore(){
if [ -d "$VNS_STORE" ]; then true; else false; fi
}
function vns_sanityCheck {
if ! vns_checkDeps; then
VNS_EXIT="$VNS_ERR_DEPS"
for DEP in "${MISSING_DEPS[@]}"; do
local VNS_DEP_EC="\$ERR_NO_$DEP"
vns_printError "Dependency %s not in path." "$DEP";
VNS_EXIT+=${!VNS_DEP_EC}
done
fi
if [ -r "$VNS_STORE/.pubkey" ]; then
VNS_PUBKEY="$(cat "$VNS_STORE/.pubkey")"
elif ! vns_checkStore; then
if [ "$(vns_index "1" "${VNS_ACTION[@]}")" != "vns_initStore" ]; then
vns_printError "The vns store does not exist."
printf " - %s\n" "Please run \`vns -i [gpg-key]\` to initialize vns."
VNS_EXIT="$VNS_ERR_NO_STORE"
fi
fi
}
#----
function vns_initStore {
mkdir -p "$VNS_STORE"
echo "$@" | awk '{print $1}' > "$VNS_KEYFILE"
}
function vns_printHelp(){
printf "%s" "usage: vns [-cedlp] <notebook/section/name>"
printf "\n%s" " vns -i <gnupg recipient>"
printf "\n%s" " vns -h"
printf "\n%s%s%s" "usage: vns " "git" " ..."
printf "\n%s" " -c | --create : Create note"
printf "\n%s" " -d | --delete : Delete note"
printf "\n%s" " -e | --edit : Open note for editing"
printf "\n%s" " -h | --help : Display this message"
printf "\n%s" " -i | --init : Write default config and initalize VNS store"
printf "\n%s" " -l | --list : List all notes in NOTEBOOK"
printf "\n%s" " -p | --print : Print note to console"
printf "\n\n"
}
function vns_list(){
# Print the tree
tree -C --noreport --prune "$VNS_STORE/$(vns_index "1" "$@")" | tail -n +2 | sed s/\.gpg//g
}
function vns_rm(){
local readonly VNS_NOTE; VNS_NOTE="$VNS_STORE/$(vns_index "1" "$@").gpg"
echo "Deleting $VNS_NOTE"
rm -f "$VNS_NOTE"
}
function vns_create(){
local readonly VNS_NOTE; VNS_NOTE="$VNS_STORE/$(vns_index "1" "$@").gpg"
# Make sure the note doesn't already exist
if [ -r "$VNS_NOTE" ]; then
vns_printError "Note already exists."
else
if [ ! -d "$(dirname "$VNS_NOTE")" ]; then
mkdir -p "$(dirname "$VNS_NOTE")"
fi
vns_NoteHeader | gpg2 -e -r "$VNS_PUBKEY" -o "$VNS_NOTE"
vns_edit "$@"
fi
}
function vns_edit(){
# Make the function more readable
local readonly VNS_NOTE; VNS_NOTE="$VNS_STORE/$(vns_index "1" "$@").gpg"
# Edit the note
vim "$VNS_NOTE"
}
function vns_print(){
gpg2 -d "$VNS_STORE/$(vns_index "1" "$@").gpg"
}
function vns_gitPassthrough(){
cd "$VNS_STORE" || exit;
git "$@";
}
# ----
function vns_argParse(){
ARGS=($@)
#echo "${#ARGS}"
VNS_ACTION=()
while getopts ":i:hc:e:p:d:" OPT; do
# If an option requiring an argument was passed without an argument,
# inform the user and set exit code to "$VNS_ERR_NS_ARGS"
case "${ARGS[!OPTIND]}" in
-i|-c|-e|-p|-d)
if [ "${#ARGS}" -lt 2 ]; then
vns_printError "A required argument was not given."
VNS_EXIT="$VNS_ERR_NS_ARGS"
return
fi
esac
case "$OPT" in
i)
VNS_ACTION=("vns_initStore" "$OPTARG");;
h)
VNS_ACTION=("vns_printHelp");;
c)
VNS_ACTION=("vns_create $OPTARG");;
e)
VNS_ACTION=("vns_edit $OPTARG");;
p)
VNS_ACTION=("vns_print $OPTARG");;
d)
VNS_ACTION=("vns_rm $OPTARG");;
esac
done
if [ "${#VNS_ACTION[@]}" -eq 0 ]; then
if [ "$(vns_index "1" "$@")" == "git" ]; then
VNS_ACTION=($@)
else
if [ -d "$VNS_STORE/$*" ]; then
VNS_ACTION=("vns_list" "$@")
else
VNS_ACTION=("vns_list" "")
fi
fi
fi
}
# Entry Point
printf "%s, %s\n" "$XL_PRODUCT" "$XL_VER"
printf "\n"
cd "$VNS_STORE" || exit;
readonly VNS_EDITOR="vim"
readonly VNS_DEPS=("vim" "gpg2" "tree" "git")
vns_argParse "$@"
vns_sanityCheck
if [ "$VNS_EXIT" -eq 0 ]; then
eval "${VNS_ACTION[@]}"
fi
printf "\n"
exit "$VNS_EXIT"