A simple sketch plugin to rename the selected layers to match the contents of their text.

rename-text-layers.js

var sketch = context.api()

var MAX_CHARS = 60
var document = sketch.selectedDocument
var selection = document.selectedLayers
var renamedTextLayers = false

selection.iterate(function(item) {
    if (!item.isText) {
        return
    }
    if (item.text.length() > MAX_CHARS) {
        item.name = item.text.substring(0, MAX_CHARS) + "…"
    } else {
        item.name = item.text
    }
    renamedTextLayers = true
})

if (renamedTextLayers) {
    sketch.message("Layer names now equal the layer’s text content.")
} else {
    sketch.message("Please select a text layer.")
}

To create and run this plugin in Sketch:

• Click the Plugin menu item in Sketch
• Click Custom Plugin…
• Paste the above script
• Click Save…
• Name it Rename text layers to match contents
• Select a layer you want the plugin to rename
• Open the Plugin menu, click Rename text layers to match contents

Tested in Sketch 43.2

Feedback or suggestions welcome @dustin