duplicate generated linearGradient id in symbol mode

Consider two icons with linear gradient and each gradient having its own unique id. for example:

bike.svg: 
<linearGradient id="BIKE_1" ... > ... </linearGradient>
<linearGradient id="BIKE_2" ... > ... </linearGradient>
<linearGradient id="BIKE_3" ... > ... </linearGradient>
...
<path fill="url(#BIKE_1)" ... />
<path fill="url(#BIKE_2)" ... />
<path fill="url(#BIKE_3)" ... />

and second icon:

car.svg: 
<linearGradient id="CAR_1" ... > ... </linearGradient>
<linearGradient id="CAR_2" ... > ... </linearGradient>
<linearGradient id="CAR_3" ... > ... </linearGradient>
...
<path fill="url(#CAR_1)" ... />
<path fill="url(#CAR_2)" ... />
<path fill="url(#CAR_3)" ... />

When sprite.svg is generated using symbol mode, these unique ids are replaced with a,b,c , … and since this auto generating id names is reset in each file, we might face a sprite.svg file with more than one id name corresponding to a gradient. Is there any way to stop generating these ids automatically and use the ones which are in original svg files?

[kirill-talk]

I’ve made some code that fix this problem

...
.pipe(svgSprite({
  mode: "symbols",
  preview: {
    symbols: './preview/symbols.html'
  },
  selector: "%f",
  svg: {
    symbols: 'symbols.svg'
  },
  transformData: function (data, config) {
    data.svg.map(function(item) {
      //change id attribute
      item.data=item.data.replace(/id=\"([^\"]+)\"/gm, 'id="'+item.name+'-$1"');

      //change id in fill attribute
      item.data=item.data.replace(/fill=\"url\(\#([^\"]+)\)\"/gm, 'fill="url(#'+item.name+'-$1)"');

      //change id in mask attribute
      item.data=item.data.replace(/mask=\"url\(\#([^\"]+)\)\"/gm, 'mask="url(#'+item.name+'-$1)"');

      //replace double id for the symbol tag
      item.data=item.data.replace('id="'+item.name+'-'+item.name+'"', 'id="'+item.name+'"');
      return item;
    });
    return data; // modify the data and return it
  }
}))
...

[donomron]

@kirill-talk sorry for my late response. this solves the problem

I’m closing this issue as @kirill-talk and @idmistir solutions worked for me.