scwrypts/zsh/scwrypts/environment/synchronize

#!/bin/zsh
_DEPENDENCIES+=()
_REQUIRED_ENV+=()
source ${0:a:h}/common.zsh
#####################################################################

_SYNCHRONIZE() {
	while [[ $# -gt 0 ]]
	do
		case $1 in
			--no-prompt ) SLIENT=1; shift 1 ;;

			* ) __WARNING "argument '$1' not recognized"
				shift 1 ;;
		esac
	done

	[ ! $SLIENT ] && {
		__yN 'change the template before sync?' && __EDIT $__ENV_TEMPLATE
		_SORT_ENV "$__ENV_TEMPLATE"
		git add $__ENV_TEMPLATE >/dev/null 2>&1
	}

	ENVIRONMENTS=$(__GET_ENV_NAMES | sort -r)

	_CLEAR_INHERITED_VARIABLES
	_INSERT_NEW_VARIABLES
	_REMOVE_OLD_VARIABLES
	_SORT_AND_CASCADE
	_ADD_DESCRIPTIONS

	__SUCCESS 'finished sync!'
}

#####################################################################

_CLEAR_INHERITED_VARIABLES() {
	for ENV_NAME in $(echo $ENVIRONMENTS)
	do
		ENV_FILE=$(__GET_ENV_FILE $ENV_NAME)
		sed -i 's/ # inherited from.*//' "$ENV_FILE"
	done
}

_INSERT_NEW_VARIABLES() {
	__STATUS 'inserting new environment variables...'

	local ENV_NAME ENV_FILE line
	while read line
	do
		for ENV_NAME in $(echo $ENVIRONMENTS)
	    do
			ENV_FILE=$(__GET_ENV_FILE $ENV_NAME)
	        grep -q "$line" $ENV_FILE || {
	            echo $line >> $ENV_FILE && __STATUS "added '$line' to '$ENV_NAME'"
	        }
	    done
	done < <(sed -n '/^./p' "$__ENV_TEMPLATE")
}

_REMOVE_OLD_VARIABLES() {
	__STATUS 'removing old environment variables...'

	local ENV_NAME ENV_FILE line
	for ENV_NAME in $(echo $ENVIRONMENTS)
	do
		ENV_FILE=$(__GET_ENV_FILE $ENV_NAME)
	    while read line
	    do
	        ENV_VAR=$(echo "$line" | sed 's/=.*/=/')
	        grep -q "$ENV_VAR" "$__ENV_TEMPLATE" || {
	            sed -i "\\%$ENV_VAR%d" "$ENV_FILE"
	            echo "$ENV_VAR" | grep -qv '^#' \
					&& __WARNING "removed unwanted '$ENV_VAR' from '$ENV_NAME'"
	        }
	    done < $ENV_FILE
	done
}

_SORT_AND_CASCADE() {
	local ENV_NAM ENV_FILE

	for ENV_NAME in $(echo $ENVIRONMENTS)
	do
		ENV_FILE=$(__GET_ENV_FILE $ENV_NAME)
		_CASCADE_ENVIRONMENT $ENV_NAME
	done

	for ENV_NAME in $(echo $ENVIRONMENTS)
	do
		ENV_FILE=$(__GET_ENV_FILE $ENV_NAME)
		_SORT_ENV "$ENV_FILE"
	done
}

_CASCADE_ENVIRONMENT() {
	local PARENT_NAME="$1"
	local PARENT_FILE=$(__GET_ENV_FILE $PARENT_NAME)

	local CHILD_NAMES=$(echo $ENVIRONMENTS | grep "^$PARENT_NAME\\.")
	[ ! $CHILD_NAMES ] && return 0

	__STATUS "cascading '$PARENT_NAME' to children"
	for CHILD_NAME in $(echo $CHILD_NAMES)
	do
		__SUCCESS "detected child '$CHILD_NAME'"
	done

	local PARENT_VAR VAR_PATTERN CHILD_NAME CHILD_FILE

	while read PARENT_VAR
	do
		VAR_PATTERN=$(echo "$PARENT_VAR" | sed 's/=.*/=/; s/\//\/\//g')
		__STATUS "propagating '$(echo $VAR_PATTERN | sed 's/^export \([^=]*\)=/\1/')' to children"

		PARENT_VAR+=" # inherited from $PARENT_NAME"

		for CHILD_NAME in $(echo $CHILD_NAMES)
		do
			CHILD_FILE=$(__GET_ENV_FILE $CHILD_NAME)

			sed -i "/^$VAR_PATTERN/d" "$CHILD_FILE"
			echo $PARENT_VAR >> "$CHILD_FILE"
		done
	done < <(sed -n '/^[^#][^=]*=[^#]\+$/p' "$PARENT_FILE")

	__SUCCESS "finished '$PARENT_NAME' propagation"
}

_ADD_DESCRIPTIONS() {
	__STATUS 'updating descriptions'
	while read DESCRIPTION_LINE
	do
		ENV_VAR=$(echo $DESCRIPTION_LINE | sed 's/ \+| .*$//')
		DESCRIPTION=$(echo $DESCRIPTION_LINE | sed 's/^.* | //')
		for ENV_NAME in $(echo $ENVIRONMENTS)
		do
			sed -i "/^export $ENV_VAR=/i # $DESCRIPTION" "$(__GET_ENV_FILE $ENV_NAME)"
		done
	done < <(sed -n '/^[^ ]\+ \+| /p' "$__ENV_TEMPLATE.descriptions")

	while read ENV_VAR
	do
		for ENV_NAME in $(echo $ENVIRONMENTS)
		do
			sed -i "/^export $ENV_VAR=/a \ " "$(__GET_ENV_FILE $ENV_NAME)"
			sed -i "s/^ $//" "$(__GET_ENV_FILE $ENV_NAME)"
		done
	done < <(grep -B1 '^$' "$__ENV_TEMPLATE.descriptions" | grep '|' | awk '{print $1;}')
}

#####################################################################
_SYNCHRONIZE $@