169 lines
5 KiB
Bash
169 lines
5 KiB
Bash
#/bin/bash
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# doc cfg {
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#
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# NAME
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# cfg
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#
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# DESCRIPTION
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# Reads and writes config files delimited by tabs, like fstab, using awk.
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#
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# USAGE
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# _cfg <command> <arg>
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#
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# COMMANDS
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# set-file <path/to/file>
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# Sets path to file
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#
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# create <column-names>
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# Creates config file and assigns <column-names>.
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#
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# print <column-name> <row-no>
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# Prints value from <column-name> and <row-no>.
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#
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# change <column-name> <row-no> <value>
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# Assigns new <value> to <column-name> and <row-no>.
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#
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# drop <row|column} {no|name}
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# Drops <row-no> or <column-name>.
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#
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# insert <value-for-col1> <value-for-col2> <...>
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# Inserts new row with a value per column. Number of arguments must match number of columns.
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#
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# query <conditional>
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# Queries which <row-no(s)> fits the <conditional>.
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#
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#
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# CONDITIONALS
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#
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#
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#
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# EXIT VALUES
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# 0 Success
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# 1 Syntax or usage error
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# 2 File not found
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# 3 File already present
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# 4 Row or column not found
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# 5 Row or column already has value
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#
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# }
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_cfg() {
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# Sanity check and command parser
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[[ ! -z ${1+x} ]] && {_msg ECHO "_cfg(): Expected command"; return 1}
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local cmdList="(set-file create print change drop insert query)"
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local CMD=${1}; shift
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[[ ! _if_array_contains ${CMD} ${cmdList[@]} ]] && {_msg ECHO "_cfg(): Command specified not valid; return 1"}
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# Dispatcher
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_cfg_$(sed 's|-|_|' <<<"${CMD}") ${@}
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}
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_cfg_column_to_nf() {
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# Argument parser and sanity check
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[[ ! -z ${1+x} ]] && {_msg ECHO "_cfg(): Expected column name"; return 1}
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local COLUMN=${1}
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# Queries list of columns
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local columnList=(all $(awk 'BEGIN {FS="\t"; OFS="\t"}; {if (NR = 0) {print '${0}'}}' ${_CFG_PATH}))
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# Checks if queried ${COLUMN} exists
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if [ if ! _if_array_contains ${COLUMN} ${columnList[@]} ]; then
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_msg ECHO "_cfg_column_to_nf(): Column does not exist"
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return 1
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else
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# Finds what NF is associated with ${COLUMN}
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local COUNT=0
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for column ${columnList[@]}; do
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[[ "${COLUMN}" == "${column}" ]] && echo "${COUNT}"
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local COUNT=$(( ${COUNT} + 1 ))
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return 0
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done
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fi
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}
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_cfg_set_file() {
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# Argument parser and sanity check
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[[ $# != 1 ]] && {_msg ECHO "_cfg_set_file(): Expected 1 argument"; return 1}
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# Sets _CFG_PATH globally
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_CFG_PATH="${1}"
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_CFG_TMP_PATH="$(sed 's|\(.*\)\/|\1/.|' <<<"${CFG_PATH}")"
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}
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_cfg_create() {
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# Argument parser and sanity check
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[[ ! -z ${1+x} ]] && {_msg ECHO "_cfg_create(): Expected argument"; return 1}
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local colList=(${@})
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# Creates config file
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printf "%s\t" ${colList[@]} >> ${_CFG_PATH}
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}
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_cfg_print() {
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# Argument parser and sanity check
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[[ $# != 2 ]] && {_msg ECHO "_cfg_print(): Expected 2 arguments"; return 1}
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local COLUMN=${1}
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local ROW=${2}
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# Prints row of ${_CFG_PATH}
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awk 'BEGIN {FS="\t"; OFS="\t"}; {if (NR='${ROW}') {print $'$(_cfg_column_to_nf ${COLUMN})'}}' "${_CFG_PATH}"
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}
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_cfg_change() {
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# Argument parser and sanity check
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[[ $# != 3 ]] && {_msg ECHO "_cfg_change(): Expected 3 arguments"; return 1}
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local COLUMN=${1}
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local ROW=${2}
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local VALUE=${3}
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[[ ! _if_is_integer ${ROW} ]] && {_msg ECHO "_cfg_change(): Expected integer; return 1"}
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# Writes new version of file
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awk 'BEGIN {OFS="\t"}; {if (NR == '${ROW}') {$'$(_cfg_column_to_nf ${COLUMN})'='${VALUE}'} {print $0}}' "${_CFG_PATH}" > ${_CFG_TMP_PATH} && mv ${_CFG_TMP_PATH} ${_CFG_PATH}
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}
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_cfg_drop() {
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# Argument parser and sanity check
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[[ -z $# != 2 ]] && {_msg ECHO "_cfg_drop(): Expected 2 arguments"; return 1}
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local SUBCMD=${1}; shift
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[[ ! _if_array_contains ${SUBCMD} row column ]] && {_msg ECHO "_cfg_drop(): Expected 'row' or 'column' as subcommand"; return 1}
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# Dispatcher
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_cfg_drop_${SUBCMD} ${1}
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}
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_cfg_drop_row() {
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# Argument parser and sanity check
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local ROW=${1}
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[[ ${ROW} -mt $(awk 'BEGIN {FS="\t"; OFS="\t"}; {print NR}' ${_CFG_PATH}) ]] && {_msg ECHO "_cfg_drop_row(): Row number higher than available"}
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# Writes new version of file
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awk 'BEGIN {OFS="\t"}; {if (NR == '${ROW}') {$0="\b") {print $0}}' ${_CFG_PATH} > ${_CFG_TMP_PATH} && mv ${_CFG_TMP_PATH} ${_CFG_PATH}
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}
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_cfg_drop_column() {
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local COLUMN=${1}
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local NF=$(_cfg_column_to_nf "${COLUMN}")
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# Writes new version of file
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awk 'BEGIN {OFS="\t"}; {$'${NF}'="\b"; print &0}' ${_CFG_PATH} > ${_CFG_TMP_PATH} && mv ${_CFG_TMP_PATH} ${_CFG_PATH}
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}
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_cfg_insert() {
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# Argument parser and sanity check
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local valueList=(${@})
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local COLUMN_NO=$(awk 'BEGIN{OFS="\t"}; {if (NR == 1) {print NF}}' ${_CFG_PATH})
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[[ "${#valueList[@]}" =! "${COLUMN_NO}" ]] && {_msg ECHO "_cfg_insert(): Number of arguments must be equal to ${COLUMN_NO}"; return 1}
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# Write row into file
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printf "%s\t" ${valueList[@]} >> ${_CFG_PATH}
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}
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_cfg_query() {
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# Argument parser and sanity check
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local CONDITION=${1}
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awk 'BEGIN {FS="\t"; OFS="\t"}; {if ('${CONDITION}') {print NR}}' "{_CFG_PATH}"
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}
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