Deno•15mo ago

Deno.readFile broken?

For some reason I can't read a file with

Deno.readFile

Deno.readFile

. I've tried relative and absolute paths. I can

cat

cat

the file without issues.

Here's the relevant snippet:

...
async function fixImport(
  file: string,
  line: number,
  char: number,
  broken: string
) {
  const fixed = broken + ".ts";

  // open the file and replace 'broken' with 'fixed'
  const relative = file.replace(Deno.cwd(), ".");

  const decoder = new TextDecoder();
  const bytes = await Deno.readFile(relative);
  const content = decoder.decode(bytes);

  ...
}
...

...
async function fixImport(
  file: string,
  line: number,
  char: number,
  broken: string
) {
  const fixed = broken + ".ts";

  // open the file and replace 'broken' with 'fixed'
  const relative = file.replace(Deno.cwd(), ".");

  const decoder = new TextDecoder();
  const bytes = await Deno.readFile(relative);
  const content = decoder.decode(bytes);

  ...
}
...

and the output including

cat

cat

root@2da2d8303d16:/secretproject/frontend/datalayer# deno run fix:imports
Task fix:imports deno run --allow-read --allow-write --allow-env --allow-net --allow-run fix.imports.ts
🔍 found broken import "/secretproject/frontend/datalayer/datalayer/core/rest/schemas.gen" in "/secretproject/frontend/datalayer/datalayer/core/rest/index.ts" (2:15)
error: Uncaught (in promise) NotFound: No such file or directory (os error 2): readfile './datalayer/core/rest/index.ts'
  const bytes = await Deno.readFile(relative);
                           ^
    at Object.readFile (ext:deno_fs/30_fs.js:747:24)
    at fixImport (file:///secretproject/frontend/datalayer/fix.imports.ts:13:28)
    at file:///secretproject/frontend/datalayer/fix.imports.ts:55:13
    at eventLoopTick (ext:core/01_core.js:175:7)
root@2da2d8303d16:/secretproject/frontend/datalayer# cat ./datalayer/core/rest/index.ts
// This file is auto-generated by @hey-api/openapi-ts
export * from "./schemas.gen";
export * from "./services.gen";
export * from "./types.gen";

root@2da2d8303d16:/secretproject/frontend/datalayer# deno run fix:imports
Task fix:imports deno run --allow-read --allow-write --allow-env --allow-net --allow-run fix.imports.ts
🔍 found broken import "/secretproject/frontend/datalayer/datalayer/core/rest/schemas.gen" in "/secretproject/frontend/datalayer/datalayer/core/rest/index.ts" (2:15)
error: Uncaught (in promise) NotFound: No such file or directory (os error 2): readfile './datalayer/core/rest/index.ts'
  const bytes = await Deno.readFile(relative);
                           ^
    at Object.readFile (ext:deno_fs/30_fs.js:747:24)
    at fixImport (file:///secretproject/frontend/datalayer/fix.imports.ts:13:28)
    at file:///secretproject/frontend/datalayer/fix.imports.ts:55:13
    at eventLoopTick (ext:core/01_core.js:175:7)
root@2da2d8303d16:/secretproject/frontend/datalayer# cat ./datalayer/core/rest/index.ts
// This file is auto-generated by @hey-api/openapi-ts
export * from "./schemas.gen";
export * from "./services.gen";
export * from "./types.gen";

marvinh.•10/18/24, 7:52 AM

Looks like the filepth is wrong. It's looking for a file at:

Is this the correct path?

marvinh.•10/18/24, 7:53 AM

I find that for finding path issues it often helps to log out

Deno.cwd()

Deno.cwd()

to see if my assumptions with relative paths is correct. You can also use to construct absolute paths from the current file

Kas.stOP•10/18/24, 7:53 AM

If I read the absolute path it fails aswell, I can

cat

cat

it without issues

marvinh.•10/18/24, 7:56 AM

Can't reproduce that on my end, regardless of passing relative or absolute paths. What I tried:

Create a new project with
Replace contents of
```
main.ts
```
```
main.ts
```
with
Run

Kas.stOP•10/18/24, 7:57 AM

hmm I've checked that and it's the same

Kas.stOP•10/18/24, 7:58 AM

here's the full script

marvinh.•10/18/24, 7:59 AM

Thanks for sharing. I assume the file you want to read is relative to that script at ?

marvinh.•10/18/24, 8:01 AM

Ah I see the issue. Your regex doesn't account for ansi escape codes. This is the file path I'm getting from the regex:

marvinh.•10/18/24, 8:05 AM

Unrelated: It looks like the goal of the script is to find and fix missing extensions in import paths. We have an unstable lint rule for that which might interest you:

It can also add the missing extensions by running:

Kas.stOP•10/18/24, 8:06 AM

oh, I saw the unstable flag but didn't know it's autofixable

Kas.stOP•10/18/24, 8:07 AM

thanks for helping!