theme/src/components/source-link.js

import {Link, Text} from '@primer/components'
import {MarkGithubIcon} from '@primer/octicons-react'
import React from 'react'

function SourceLink({href}) {
  return (
    <Link href={href}>
      <MarkGithubIcon />
      <Text ml={2} display="inline-block">
        View source
      </Text>
    </Link>
  )
}

export default SourceLink