`mint format some_file.mint` should return code 0 if no syntax error regardless if `some_file.mint` if changed.

[zw963]

Please check following WIP discuss.

lassik/emacs-format-all-the-code#198

Also following PR:

lassik/emacs-format-all-the-code#200 (comment)

[gdotdesign]

I'm not sure what changes are requested here.

The format only returns 1 if there is an error while formatting, this for example returns 0 for valid input:

➜  app-desktop git:(master) ✗ echo 'module X {const A = ""}' | mint format --stdin
module X {
  const A = ""
}

➜  app-desktop git:(master) ✗ echo $?
0

This returns 1 for invalid input:

➜  app-desktop git:(master) ✗ echo 'module x {const A = ""}' | mint format --stdin
Unhandled exception: ░ SYNTAX ERROR ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░

I was looking for the name of a module but found "x" instead. 

The name of a module must start with an uppercase letter and only contain 
lowercase, uppercase letters and numbers. 

Here is the relevant code snippet: 

┌─┬ stdin.mint:1:8 ────────────────────────────────────────────────────────────┐
│1│ module x {const A = ""}                                                    │
└─┴────────────────────────────────────────────────────────────────────────────┘

 (Mint::Parser::ModuleExpectedName)
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from ???
  from src/env/__libc_start_main.c:94:2 in 'libc_start_main_stage2'
➜  app-desktop git:(master) ✗ echo $?
1

It should catch the exception but still should return 1

---

If you like to have formatting, I recommend using the mint language server itself, it has a command for formatting code and also format files when saved.

[lassik]

Sorry about the false alarm.

The format only returns 1 if there is an error while formatting, this for example returns 0 for valid input:

That is The Right Thing To Do (TM).

$ echo '{}' >mint.json

$ echo 'module X {const A = ""}' >example.mint

$ mint format --stdin <example.mint >example2.mint; echo $?
0

$ mint format --stdin <example2.mint >/dev/null; echo $?
0

The above is exactly what we need.

[gdotdesign]

👍 Can I close this issue then?

[lassik]

Yes.

[zw963]

I'm not sure what changes are requested here.

Okay, thanks for reply, in fact, the --stdin is really what we want i think.

Though, i don't understood why mint format some_file.mint will return 1 when some_file.mint
content get changes. in the purpose is used in CI, should we use like mint format --check some_file.mint instead?

If you like to have formatting, I recommend using the mint language server itself, it has a command for formatting code and also format files when saved.

What you said is LSP server?

---

UPDATED: okay, i saw the mint ls command, it really cool and unbelievable, because mint write use crystal, even crystal no official language server for now.

[lassik]

Though, i don't understood why mint format some_file.mint will return 1 when some_file.mint
content get changes.

That's right - I can reproduce this behavior. It seems different from the --stdin behavior.

[gdotdesign]

Yep that's a bug, reopening the issue then :)