Plugin throws `Cannot read property 'split' of undefined` when using files references

[theGlenn]

When splitting config into different files and referencing them through the following pattern —see below— plugin throws Cannot read property 'split' of undefined.

...
resources:
    - ${file(resources/cognito-user-pool.yml)}

Full stacktrace:

TypeError: Cannot read property 'split' of undefined
    at _.values.map.map.h (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/src/typescript.ts:53:31)
    at Array.map (<anonymous>)
    at Object.extractFileNames (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/src/typescript.ts:52:6)
    at TypeScriptPlugin.get rootFileNames [as rootFileNames] (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/src/index.ts:71:23)
    at TypeScriptPlugin.<anonymous> (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/src/index.ts:132:51)
    at Generator.next (<anonymous>)
    at /Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/dist/src/index.js:7:71
    at new Promise (<anonymous>)
    at __awaiter (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/dist/src/index.js:3:12)
    at TypeScriptPlugin.compileTs (/Users/glenn/Dev/Freelancing/Haloha/haloha-api/node_modules/serverless-plugin-typescript/dist/src/index.js:103:16)
    at BbPromise.reduce (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:390:55)
From previous event:
    at PluginManager.invoke (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:390:22)
    at PluginManager.spawn (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:408:17)
    at Deploy.BbPromise.bind.then.then (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/plugins/deploy/deploy.js:123:50)
From previous event:
    at Object.before:deploy:deploy [as hook] (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/plugins/deploy/deploy.js:113:10)
    at BbPromise.reduce (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:390:55)
From previous event:
    at PluginManager.invoke (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:390:22)
    at PluginManager.run (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/classes/PluginManager.js:421:17)
    at variables.populateService.then.then (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/Serverless.js:157:33)
    at runCallback (timers.js:693:18)
    at tryOnImmediate (timers.js:664:5)
    at processImmediate (timers.js:646:5)
    at process.topLevelDomainCallback (domain.js:121:23)
From previous event:
    at Serverless.run (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/lib/Serverless.js:144:8)
    at serverless.init.then (/Users/glenn/.nvm/versions/node/v10.8.0/lib/node_modules/serverless/bin/serverless:43:50)

[abetaev]

i am getting the same issue when trying to refer to ${self} yml block
ex:
block i am refferring to:

custom:
  authorizerConfig:
    name: authorize
    type: request
    identitySource: method.request.header.Authorization, context.path, context.httpMethod

my reference:

functions:
  authorize:
    handler: security.authorize
  invoke:
    handler: service.invoke
    events:
      - http:
          path: entity
          method: GET
          cors: true
          authorizer: ${self:custom.authorizerConfig}

with SLS_DEBUG='*' i get the following stacktrace:

TypeError: Cannot read property 'split' of undefined
    at _.values.map.map.h (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/typescript.ts:53:31)
    at Array.map (<anonymous>)
    at Object.extractFileNames (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/typescript.ts:52:6)
    at TypeScriptPlugin.get rootFileNames [as rootFileNames] (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/index.ts:71:23)
    at TypeScriptPlugin.<anonymous> (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/index.ts:132:51)
    at Generator.next (<anonymous>)
    at /home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/dist/src/index.js:7:71
    at new Promise (<anonymous>)
    at __awaiter (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/dist/src/index.js:3:12)
    at TypeScriptPlugin.compileTs (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/dist/src/index.js:103:16)
    at TypeScriptPlugin.<anonymous> (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/index.ts:35:20)
    at Generator.next (<anonymous>)
    at /home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/dist/src/index.js:7:71
    at new Promise (<anonymous>)
    at __awaiter (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/dist/src/index.js:3:12)
    at Object.before:offline:start [as hook] (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless-plugin-typescript/src/index.ts:34:31)
    at BbPromise.reduce (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/lib/classes/PluginManager.js:391:55)
From previous event:
    at PluginManager.invoke (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/lib/classes/PluginManager.js:391:22)
    at PluginManager.run (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/lib/classes/PluginManager.js:422:17)
    at variables.populateService.then.then (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/lib/Serverless.js:157:33)
    at processImmediate (timers.js:632:19)
    at process.topLevelDomainCallback (domain.js:120:23)
From previous event:
    at Serverless.run (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/lib/Serverless.js:144:8)
    at serverless.init.then (/home/abetaev/documents/dev/nm/universal-cart/node_modules/serverless/bin/serverless:44:28)

[nerijunior]

@abetaev I'm in the same trouble!

[smira2000]

Any ideas of how to fix this?

[SergiiNozhka]

Had the same issue, but it was just misprint in handler keyword under function name.

[OrganicCat]

I had the same issue, and it was me spelling handler as hander in my yaml file.

I wish the error reporting was clearer on this, since it wasn't related at all to something a dev can recognize and trace