Function handler

packages/nuxt/src/components/plugins/component-names.ts:28–65

(code, id)

        id: { include: FILENAME_RE },
      },
      handler (code, id) {
        const filename = id.match(FILENAME_RE)?.[1]
        if (!filename) {
          return
        }
        const component = options.getComponents().find(c => c.filePath === id)

        if (!component) {
          return
        }

        const NAME_RE = new RegExp(`__name:\\s*['"]${filename}['"]`)
        const s = new MagicString(code)
        s.replace(NAME_RE, `__name: ${JSON.stringify(component.pascalName)}`)

        // Without setup function, vue compiler does not generate __name
        if (!s.hasChanged()) {
          parseAndWalk(code, id, function (node) {
            if (node.type !== 'ExportDefaultDeclaration') {
              return
            }

            const { start, end } = node.declaration
            s.overwrite(start, end, `Object.assign(${code.slice(start, end)}, { __name: ${JSON.stringify(component.pascalName)} })`)
            this.skip()
          })
        }

        if (s.hasChanged()) {
          return {
            code: s.toString(),
            map: options.sourcemap
              /* v8 ignore next */
              ? s.generateMap({ hires: true })
              : undefined,
          }
        }
      },
    },
  }
})