coc-prettier: [help] Silent failure

What doesn’t work

• :call CocAction('format')
• :CocCommand prettier.formatFile
• :Prettier

The commands report success, but the file doesn’t change. Especially with :call CocAction('format') I get the response [coc.nvim] Formatted by prettier, while with other two commands it just finishes without reporting anything in the output. Ofc, format on save doesn’t work.

All of those worked completely fine until a few days ago. I don’t know what changed, I did run arch packages update and update of vim plugins and of coc extensions but i’ve also tried reverting them without fixing the problem.

I tried

• reverting my dotfiles to a point where it surely worked (my .vimrc)
• reverting the project in question to a point when it worked
• trying it out on a different typescript project (the two use node versions v10.20.1 and v12.14.1)
• reinstalling older version of coc-prettier (tried 1.1.18, 1.1.19, 1.1.20)
• updating prettier dependency to the latest version

What works well

• Interesting thing is that in that project I have this script:

"format": "prettier --write \"src/**/*.ts\""

Which works just fine.

• Also if I run ./node_modules/prettier/bin-prettier.js src/main.ts from the project’s root, the output is properly reformatted file.
• Running it on a pure javascript file works well (in any project)

Context (files)

:CocConfig (only global, no local):

{
  "prettier.tslintIntegration": true,
  "coc.preferences.formatOnSaveFiletypes": [
    "css",
    "javascript",
    "typescript",
    "json",
    "jsonc"
  ],
  "coc.preferences.colorSupport": false,
  "diagnostic.hintSign": ">>",
  "diagnostic.infoSign": "ℹ️",
  "diagnostic.warningSign": "⚠️",
  "diagnostic.errorSign": "💣",
  "diagnostic.enableHighlightLineNumber": true,
  "diagnostic-languageserver.filetypes": {
    "vim": "vint",
    "email": "languagetool",
    "markdown": ["write-good", "markdownlint"],
    "sh": "shellcheck"
  },
  "typescript.preferences.importModuleSpecifier": "relative",
  "markdownlint.config": {
    "line-length": false,
    "MD022": false,
    "MD032": false,
    "MD033": false, // inline HTML shouldn't be forbidden (<a name="asdf"></a>...[goto](#asdf))
    "MD034": false,
    "MD025": { "front_matter_title": "" }
  },
  "languageserver": {
    "ccls": {
      "command": "ccls",
      "filetypes": ["c", "cpp", "cuda", "objc", "objcpp"],
      "rootPatterns": [".ccls-root", "compile_commands.json"],
      "initializationOptions": {
        "cache": {
          "directory": ".ccls-cache"
        },
        "client": {
          "snippetSupport": true
        }
      }
    }
  },
  "explorer.icon.enableNerdfont": true
}

.config/coc/extensions/package.json:

{
  "dependencies": {
    "coc-db": ">=0.0.43",
    "coc-emoji": ">=1.2.3",
    "coc-explorer": ">=0.9.1",
    "coc-highlight": ">=1.2.6",
    "coc-jest": ">=1.1.1",
    "coc-json": ">=1.3.2",
    "coc-markdownlint": ">=1.7.0",
    "coc-prettier": ">=1.1.18",
    "coc-python": ">=1.2.13",
    "coc-sql": ">=0.4.0",
    "coc-syntax": ">=1.2.4",
    "coc-tsserver": ">=1.6.0",
    "coc-word": ">=1.2.2"
  }
}

.prettierrc:

{
  "useTabs": false,
  "singleQuote": true,
  "trailingComma": "all",
  "tabWidth": 2,
  "printWidth": 120
}

tslint.json:

{
  "defaultSeverity": "error",
  "extends": ["tslint:recommended", "tslint-config-prettier"],
  "jsRules": {
    "no-unused-expression": true
  },
  "rules": {
    "arrow-parens": false,
    "array-type": false,
    "curly": [true, "ignore-same-line"],
    "eofline": true,
    "indent": [true, "spaces", 2],
    "interface-name": false,
    "max-classes-per-file": false,
    "max-line-length": [true, 120],
    "member-access": false,
    "member-ordering": [
      true,
      {
        "order": [
          "public-static-field",
          "public-static-method",
          "protected-static-field",
          "protected-static-method",
          "private-static-field",
          "private-static-method",
          "public-instance-field",
          "protected-instance-field",
          "private-instance-field",
          "public-constructor",
          "protected-constructor",
          "private-constructor",
          "public-instance-method",
          "protected-instance-method",
          "private-instance-method"
        ]
      }
    ],
    "no-empty": false,
    "no-empty-interface": false,
    "no-unused-expression": true,
    "object-literal-sort-keys": false,
    "one-line": true,
    "one-variable-per-declaration": true,
    "ordered-imports": true,
    "quotemark": [true, "single", "avoid-escape"],
    "variable-name": [
      true,
      "ban-keywords",
      "check-format",
      "allow-snake-case",
      "allow-pascal-case",
      "allow-leading-underscore"
    ]
  },
  "rulesDirectory": []
}