shell-base/module.lib

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#!/bin/bash
# echo loading module library
module_confirm() {
local FILE
local DIR
local NAME
DIR=$1
NAME=$2
# echo finding $NAME in $DIR
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# TODO use file instead for valid extensions
# allow explicit extension
FILE="$(command find -L ${DIR} -type f -name "${NAME}.mod" -o -name "${NAME}".lib -o -name "${NAME}".func -o -name "${NAME}".sh -o -name "${NAME}".env)"
# echo files found $FILE
COUNT=0
if [ "$FILE" ]; then
COUNT=$(echo $FILE | xargs -n 1 | wc -l)
fi
# echo Number: $COUNT
if [ $COUNT -gt 1 ]; then
echo two or more modules of same name found, aborting
echo $FILE | xargs -n 1
return 1
fi
[ $COUNT == 1 ] && echo $FILE && return 0
return 1
}
# if succesfull returns the path
module_find() {
[ ! $1 ] && echo "no module specified" && return 1
local MDIRS
local MDIR
local DIRS
local MODULE=$1
# MODULE_DIRS is array set in the environment and is an array of additional directories to
# search for modules. This makes is easy to include a custom module libraries outside
# the shell system. These take precedence over any modules found in shell directories below.
# Precedence is first in list to last.
if [[ $MODULE_DIRS ]]; then
for DIR in "${MODULE_DIRS[@]}"
do
if [[ -d $DIR ]]; then
RES=$(module_confirm "$DIR" "$MODULE")
[ $? -eq 0 ] && echo $RES && return 0
fi
done
fi
# BASH_SHELL_DIRS holds shell directories to search for modules. If will be searched
# in revsere order, user or network repos over host over base
DIRS=( ${BASH_SHELL_DIRS:-$BASH_SHELL_BASE} )
[ -d $HOME/$BASH_SHELL_USER ] && DIRS=("${DIRS[@]}" "$HOME/$BASH_SHELL_USER")
[ -d $BASH_SHELL_DEV ] && DIRS=("${DIRS[@]}" "$BASH_SHELL_DEV")
cnt=${#DIRS[@]}
for ((i=1;i<=cnt;i++)); do
# find modules in reverse order so more specific ones override
DIR="${DIRS[cnt-i]}/modules"
if [[ -d $DIR ]]; then
RES=$(module_confirm "$DIR" "$MODULE")
[ $? -eq 0 ] && echo $RES && return 0
fi
done
# no module found anywhere
return 1
}
module_load() {
[ ! $1 ] && echo "no module specified" && return 1
# (return 0 2>/dev/null) && echo "module_load was sourced" || echo "module_log was executed"
local FILE
FILE=$(module_find $1)
[ $? -ne 0 ] && echo no module $1 found && return 1
# source $FILE "$0"
# [[ $BASHPID -eq $$ ]] || echo $FILE
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shift 1
source $FILE "$@"
return 0
}
module_print() {
[ ! $1 ] && echo "no module specified" && return 1
# (return 0 2>/dev/null) && echo "module_load was sourced" || echo "module_log was executed"
local FILE
FILE=$(module_find $1)
[ $? -ne 0 ] && echo no module $1 found && return 1
cat $FILE
return 0
}
module_loaded() {
[ ! $1 ] && echo "no module specified" && return 1
local func
local ret
local file
ret=0
# function_list | grep module
file=$(module_find $1)
[ ! $file ] && echo no module $1 found && return 1
# echo "$(function_list $file)"
for func in $(function_list $file)
do
[ ! $(function_list | grep $func) ] && ret=1
[[ $2 = -vv ]] && ([[ $ret = 0 ]] && echo "$func loaded" || echo "$func not loaded")
done
[[ $2 = -v ]] && echo "module: $1" && ([[ $ret = 0 ]] && echo "all functions " || echo "some or all functions not loaded")
[[ $ret = 0 ]] && echo "loaded"
return $ret
}
# exported for login environment
# declare -f -x module_load
# declare -f -x module_find
# declare -f -x module_confirm
# uncomment for testing
# function _test_modules {
# RED='\033[0;31m'
# NC='\033[0m' # No Color
# echo module to test: $1
# echo --------------------
# echo -e "testing: ${RED}module_find${NC}"
# FILE=$(module_find $1)
# [ $? -ne 0 ] && echo no module $1 found && return 1
# echo module $FILE found
# # . $FILE
# echo ---------------
# echo -e "testing: ${RED}module_load${NC}"
# module_load $1
# [ $? -ne 0 ] && echo no module $1 found && return 1
# echo loaded module $1
# echo ----------------------
# echo -e "testing: ${RED}module_loaded${NC}"
# module_loaded $1
# }