coc-settings.json

{
    "languageserver": {
        "clangd": {
            "command": "clangd",
            "args": ["--background-index"],
            "rootPatterns": ["compile_flags.txt", "compile_commands.json", ".vim/", ".git/", ".hg/"],
            "filetypes": ["c", "cpp", "objc", "objcpp"]
        },
        "python": {
            "command": "python3",
            "args": [
                "-mpyls",
                "-vv",
                "--log-file",
                "/tmp/lsp_python.log"
            ],
            "trace.server": "verbose",
            "filetypes": [ "python" ],
            "settings": {
                "pyls": {
                    "enable": true,
                    "trace": { "server": "verbose" },
                    "commandPath": "",
                    "configurationSources": [ "pycodestyle" ],
                    "plugins": {
                        "jedi_completion": { "enabled": true },
                        "jedi_hover": { "enabled": true },
                        "jedi_references": { "enabled": true },
                        "jedi_signature_help": { "enabled": true },
                        "jedi_symbols": { "enabled": true, "all_scopes": true },
                        "mccabe": { "enabled": true, "threshold": 15 },
                        "preload": { "enabled": true },
                        "pycodestyle": { "enabled": true },
                        "pydocstyle": { "enabled": false, "match": "(?!test_).*\\.py", "matchDir": "[^\\.].*" },
                        "pyflakes": { "enabled": true },
                        "rope_completion": { "enabled": true },
                        "yapf": { "enabled": true }
                    }
                }
            }
        }
    },

    "diagnostic.enable": true,
    "diagnostic.virtualText": false,
    "diagnostic.errorSign": "•",
    "diagnostic.warningSign": "•",
    "diagnostic.infoSign": "•",
    "python.analysis.diagnosticEnabled": true,

    "codeLens.enable": false,
    "codeLens.separator": "‣",
    "codeLens.subseparator": " ",
    "xml.codeLens.enabled": true,

    "suggest.triggerAfterInsertEnter": true,
    "suggest.timeout": 500,
    "suggest.noselect": false,
    "suggest.enablePreview": true,
    "suggest.echodocSupport": true,

    "solargraph.diagnostics":  true,
    "solargraph.completion": true,
    "solargraph.references": true,
    "solargraph.symbols": true,
    "solargraph.definitions": true,
    "solargraph.autoformat": true,
    "solargraph.formatting": true,

    "rust.full_docs": true,
    "rust.show_warnings": true,
    "rust.show_hover_context": true,

    "java.completion.overwrite": true,
    "java.implementationsCodeLens.enabled": true,
    "java.errors.incompleteClasspath.severity": "ignore"
}