TypeScript complains about overwriting .d.ts files that are potentially known outputs

[ORESoftware]

Using tsc at the command line, I got

error TS5055: Cannot write file '/Users/alexamil/WebstormProjects/oresoftware/ldap-pool/index.d.ts' because it would overwrite input file.

why? :)

my tsconfig.json file is as follows

{
  "compilerOptions": {
    "declaration": true,
    "baseUrl": ".",
    "types": [
      "node"
    ],
    "typeRoots": [
      "node_modules/@types"
    ],
    "target": "es5",
    "module": "commonjs",
    "noImplicitAny": true,
    "removeComments": true,
    "allowUnreachableCode": true,
    "lib": [
      "es2015",
      "es2016",
      "es2017"
    ]
  },
  "compileOnSave": false,
  "exclude": [
    "node_modules"
  ]
}

[ORESoftware]

nope, it's not because of the include property, I removed it, and same problem. this is a weird one folks.

[DanielRosenwasser]

If you remove the include field, then it implicitly includes everything. I guess you could consider excluding .d.ts files, but the point is that .d.ts is a valid input as well.

It would be helpful to get feedback from others on this.

[the1mills]

But generated .d.ts files are not input files!

As you can see in this case that it's being autogenerated.

Why would tsc complain?

[DanielRosenwasser]

.d.ts files could be generated, or could be written by hand to fill in for an input .js file. Keeping this in mind is important, especially as we consider supporting .d.ts emit from .js files going forward.

[DanielRosenwasser]

I still don't think the configuration is appropriate - .d.ts output files are being included in your input files which would be a problem for any project configuration I've ever seen.

[the1mills]

Daniel, sorry if I wasnt clear ( i am the same person as oresoftware). But two days ago on this thread I clearly stated that the same exact problem occurs when I remove the includes entry altogether from tsconfig.json. This issue does not have to do with the includes property.

[kitsonk]

As Daniel stated:

If you remove the include field, then it implicitly includes everything.

Outputting to the same path that your input from is a folly that will cause you endless heartache. How do you expect tsc to determine the difference between a generated .d.ts and one that was intentionally added as an input file? Definition files can be both input and output files.

[ORESoftware]

@kitsonk this is almost certainly operator error on my part - I have 10+ typescript projects and only this one is suffering from the problem, and I have such a simple configuration, I don't know what's going on yet.

But as far "How do you expect", the answer is simple..

I have an index.ts file + declaration:true
therefore, tsc should be smart enough to know that index.d.ts would be a generated file. There is no way it wouldn't be autogenerated given my setup.

And therein lies my bemusement.

[ORESoftware]

I updated the original question - I have only one tsconfig.json file in the project and this is barebones and is causing the problem still.

error TS5055: Cannot write file '/Users/alexamil/WebstormProjects/oresoftware/ldap-pool/index.d.ts' because it would overwrite input file.

[ORESoftware]

here is a link to the project, if you want to see the problem for yourself:

https://github.com/ORESoftware/ldap-pool

[ORESoftware]

If I do this:

 "include":[
    "*.ts",
    "!*.d.ts"
  ]

then it does not complain - however, I swear I have other projects where I do not need to use that includes property, and they work fine, I am confused.

[hoegge]

What version of TSC do you use? When using TSC 1.8 I have the problem below but is gone with version 2.4:

If you generate output in same folder as input you can get the error

TS5055: cannot write file 'file.d.ts' because it would overwrite input file.

This is (off course) because tsc reads also the *.d.ts files. But when I add the option "exclude": [ "**/*.d.ts" ] " to tsconfig.json the error does not go away. That means that tsc does actually not exclude the files I've specified.