Add OTA firmware extraction command

src/commands/ota-firmware.ts

@@ -0,0 +1,30 @@
+import { Command, flags } from '@oclif/command'
+import { run } from '../util/process'
+import { readFile } from '../util/fs'
+
+import YAML from 'yaml'
+
+export default class ExtractFirmware extends Command {
+  static description = 'extract firmware partitions'
+
+  static flags = {
+    help: flags.help({char: 'h'}),
+    factoryOtaPath: flags.string({char: 'f', description: 'path to stock factory OTA images zip (for extracting firmware)', required: true}),
+  }
+
+  static args = [
+    {name: 'configPath', description: 'path to device-specific YAML config', required: true},
+  ]
+
+  async run() {
+    let {args: {configPath}, flags: {factoryOtaPath}} = this.parse(ExtractFirmware)
+    
+    // parse config file
+    let config = YAML.parse(await readFile(configPath))
+    let vendor = "google_devices"
+    let device = config.device.name
+
+    let outDir = `vendor/${vendor}/${device}/firmware`
+    await run(__dirname + `/../../external/extract_android_ota_payload/extract_android_ota_payload.py ${factoryOtaPath} ${outDir}`)
+  }
+}