shell-base/shell.env

#!/bin/bash
# UCI SHELL REPOS ENVIRONMENT
# see README.md for details of how the system work
# In a nutshell its a set of directories that are sourced when creating a shell
# The repos allow one to organize functionality across machines, users and networks

# echo DEBUG: sourcing shell.env

# This file gets sourced early in /etc/profile for all login and 
# for interactive non-login shells via /etc/bash.bashrc 

# for interactive login shell (ssh is about the only case)
# loading the shell might cause issues specially using rsync
# It can be turned off per user or host in the appropriate directory
# with NO_BASH_SHELL_SSH=true
# this does not effect non-interactive login shells like at user first login


# if bash is not installed then don't bother to continue
! command -v bash >/dev/null 2>&1 && echo no bash command && return 1
export SHELL=$(command -v bash )

# without changing /etc/profile you can disable loading the UCI Shell system
# by uncommenting this line.  It will only set up a simple prompt instead.
# if UCI shell is causing issues then one can invoke this 
# BASH_SAFE_MODE=true
# todo add safemode enable/disable function that (un)comments

if [[ $BASH_SAFE_MODE ]]; then
RED='\033[0;31m';NC='\033[0m'
printf "${RED}BASH SHELL SAFE MODE ENABLED${NC}\n"
export BASH_SAFE_MODE;
return 2
fi

# You can overwrite the default environment variables in this file
# There is NOT a lot of reasons to do so unless you prefer other directory locations

# within each of those directories if a load.sh exits it will be run
# otherwise files will be sourced according to load.sh in the base repo
export BASH_SHELL_LOAD=$BASH_SHELL_BASE/load.sh # load.sh is default

export BASH_SHELL_STARTUP=$BASH_SHELL_BASE/startup.sh # startup.sh is default

# for non-interactive login shells (like at boot) 
# load this library that allows loading additional modules
export BASH_ENV=$BASH_SHELL_BASE/module.lib #  module loading functions
# otherwise comment above and uncommented next line
# export BASH_ENV=$BASH_SHELL_LOAD # load same as interactive shell, beware usually causes issues!!!

# set ssh session if non-interactive only
([ -n "$SSH_CONNECTION" ] || [ -n "$SSH_CLIENT" ] || [ -n "$SSH_TTY" ]) && export SSH_SESSION=true

# By default it will set up a master directory /shell

# DEFAULT DIRECTORY STRUCTURE
# /shell  
#   -- base  # $BASH_SHELL_BASE=/shell/base (default)  is set in /etc/profile during setup
#   -- any 
#          -- host
#          -- network
#   -- networks     
#          -- <network name>
#          -- <another network name>
#   -- <hostname>
#   -- $HOME/shell  # user

# default loading preference is first in list is lowest and last is highest
# for example a function "test" in the BASE will be overwritten by one the HOST repo
#  that is the same for startup scripts and module loading.

BASH_SHELL_DIRS="$BASH_SHELL_BASE "

declare parent
parent=$(dirname $BASH_SHELL_BASE)

# Any Host
BASH_SHELL_ANY_HOST=${parent}/any/host  # or set to 
# export BASH_SHELL_ALL_HOSTS=<some directory>
# Host
BASH_SHELL_HOST=$parent/$(hostname)
# export BASH_SHELL_HOST=<some directory>

BASH_SHELL_ANY_NETWORK=$parent/any/network
# export BASH_SHELL_ALL_NETWORKS=<some directory>

# by default USER shell sources will be looked for under $HOME/shell
# but the default directory for all users can be set manually below 
# export BASH_SHELL_USER=<some directory under $HOME>
# add this export to .bashrc for custom directory.  This can be done during or after using the user setup script

[[ -d $BASH_SHELL_ANY_HOST ]] && BASH_SHELL_DIRS+="$BASH_SHELL_ANY_HOST " && export BASH_SHELL_ANY_HOST
[[ -d $BASH_SHELL_ANY_NETWORK ]] && BASH_SHELL_DIRS+="$BASH_SHELL_ANY_NETWORK " && export BASH_SHELL_ANY_NETWORK 

# now load and export module loading functions library
source $BASH_SHELL_BASE/module.lib

module_load network-dirs

BASH_NETWORKS_DIR=$parent/networks
# BASH_NETWORKS_DIR=<some directory>  # alt directory to look for networks
export BASH_NETWORKS_DIR

# These will be loaded for all users on a host
network_dirs "$BASH_SHELL_HOST/.networks"

[[ -d $BASH_SHELL_HOST ]] && BASH_SHELL_DIRS+="$BASH_SHELL_HOST " && export BASH_SHELL_HOST

# these loaded only for specific user on a host
network_dirs "$HOME/${BASH_SHELL_USER:-"shell"}/.networks"

# if this directory exists it is included first in the sourcing
# if allows on the develop scripts and modules, etc for later incorporation into a repo
export BASH_SHELL_DEV=/opt/shell    
BASH_SHELL_DIRS+="$BASH_SHELL_DEV "

export BASH_SHELL_DIRS

# echo ALL DIRS: $BASH_SHELL_DIRS

# cat $HOME/.bashrc
# source "$HOME/.bashrc"

# env | grep BASH
# env | grep NETWORK_DIRS
# echo  ---------------------------------
# echo $BASH_SHELL_DIRS
# echo  ---------------------------------

# echo end shell env


#archived ---for deletion or better explanation

# echo enabling aliases with non-interactive shell
# DEPRECATED # export BASH_USE_ALIAS=true  # will source aliases for non-interactive
# if not using implicit sourcing for non-interactive shells then one can do this per script
##################
# expanding aliases is optional
# shopt -s expand_aliases
# source $BASH_SHELL_LOAD
#  < your script code >
# shopt -u expand_aliases
####################