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machine.js

  Machine({
    id: `inc-build`,
    initial: `fetchingEnvironment`,
    context: {
      refreshBody: null,
    },
    states: {
      fetchingEnvironment: {
        invoke: {
        //   src: (_context, _event) => controller.fetchEnvironment(),
          onDone: `fetchingBuildId`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      fetchingBuildId: {
        invoke: {
        //   src: (_context, _event) => controller.fetchBuildId(),
          onDone: `cloning`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      cloning: {
        invoke: {
        //   src: (_context, _event) => controller.clone(),
          onDone: `installing`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      installing: {
        invoke: {
        //   src: (_context, _event) => controller.install(),
          onDone: `pollingForWork`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      clearCache: {
        invoke: {
        //   src: (_context, _event) => controller.clearCache(),
          onDone: `building`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      pullingSource: {
        invoke: {
        //   src: (_context, _event) => controller.pull(),
          onDone: `ensuringLatestDependencies`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      ensuringLatestDependencies: {
        invoke: {
        //   src: (_context, _event) => controller.ensureLatestDependencies(),
          onDone: `clearCache`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      pollingForWork: {
        invoke: {
        //   src: async (_context, _event) => controller.pollForWork(),
          onDone: {
            target: `running`,
            // actions: send(() => {
            //   const event = controller.getBuildEvent()
            //   return { type: event || `POLLING` }
            // }),
          },
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      running: {
        on: {
          POLLING: `pollingForWork`,
          REBUILD: `stopping`,
          SOURCE_UPDATE: `pullingSource`,
          DATA_UPDATE: {
            target: `refreshing`,
            // actions: assign({
            //   // store the request body in the context, to be read from the refreshing state
            //   refreshBody: (_context, event) => event.payload,
            // }),
          },
        },
      },

      building: {
        invoke: {
        //   src: async () => {
        //     await controller.incBuild()
        //   },
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
        on: {
          DONE: {
            target: `uploading`,
          },
        },
      },

      refreshing: {
        invoke: {
        //   src: async context => {
        //     await controller.refresh(context.refreshBody)
        //   },
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
        on: {
          DONE: `uploading`,
        },
      },

      uploading: {
        invoke: {
        //   src: (_context, event) => {
        //     const dirPath = get(event, `path`)
        //     const deletedFiles = get(event, `deletedFiles`)

        //     return controller.incrementalUpload({ dir: dirPath, deletedFiles })
        //   },
          onDone: `pollingForWork`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },

      stopping: {
        invoke: {
        //   src: (_context, _event) => controller.stop(),
          onDone: `ensuringLatestDependencies`,
          onError: {
            // actions: (_, event) => controller.logError(event),
            target: `pollingForWork`,
          },
        },
      },
    },
  })