[SOLVED] Replace string which is two lines previous to matched pattern

Issue

I have a big config.js file and I would like to replace default:false, to default:true, which is on top of field:'$scope.keepEffort'. I tried multiple sed command solutions but nothing seems to work.

                    {
                            default:false,
                            enabled:true,
                            field:'criticalPath',
                            filter:false,
                            filterValue:'',
                            id:'show-critical-path',
                            operator:'colorize'
                    },{
                            default:false,
                            enabled:true,
                            field:'$scope.keepEffort',
                            filter:false,
                            filterValue:'',
                            id:'effort-constant',
                            operator:'var'
                    },{
                            default:false,
                            enabled:true,
                            field:'$scope.automaticProgress',
                            filter:false,
                            filterValue:'',
                            id:'automatic-progress',
                            operator:'var'
                    },{
                            default:false,
                            enabled:true,
                            field:'groupView',
                            filter:false,
                            filterValue:'',
                            id:'gantt-group-view',
                            operator:'var'
                    },{

Solution

This is a job for awk. The following does not attempt to match the single quotes since doing so requires some shell quoting that obfuscates the solution. Also, a trailing { is printed. That is easy enough to remove, and the code for doing so is omitted for clarity:

awk '/field:.\$scope.keepEffort/{gsub("default:false","default:true")}1' RS=\{ ORS=\{ input-file

The idea is simply to separate the records by { and then perform the substitution (via gsub) only on records that match the desired line.

Answered By - William Pursell

Answer Checked By - Mildred Charles (WPSolving Admin)