none-ls fails with "failed to spawn command pmd: EACCESS: permission denied" but command is executable

[Federico Abella]

FAQ

• I have checked the FAQ and it didn't resolve my problem.

Issues

• I have checked existing issues and there are no issues with the same problem.

Neovim Version

0.9.5

Dev Version?

• I am using a stable Neovim release version, or if I am using a dev version of Neovim I have confirmed that my issue is reproducible on a stable version.

Operating System

Ubuntu 23.10

Minimal Config

-- this template is borrowed from nvim-lspconfig
local on_windows = vim.loop.os_uname().version:match("Windows")

local function join_paths(...)
    local path_sep = on_windows and "\\" or "/"
    local result = table.concat({ ... }, path_sep)
    return result
end

vim.g.loaded_remote_plugins = ""
vim.cmd([[set runtimepath=$VIMRUNTIME]])

local temp_dir = vim.loop.os_getenv("TEMP") or "/tmp"

vim.cmd("set packpath=" .. join_paths(temp_dir, "nvim", "site"))

local package_root = join_paths(temp_dir, "nvim", "site", "pack")
local install_path = join_paths(package_root, "packer", "start", "packer.nvim")
local compile_path = join_paths(install_path, "plugin", "packer_compiled.lua")

vim.filetype = on

vim.filetype.add({
    extension = {
        cls = 'apex',
        apex = 'apex',
        trigger = 'apex',
        soql = 'soql',
        sosl = 'sosl',
    }
})

local null_ls_config = function()
    local null_ls = require("null-ls")
    -- add only what you need to reproduce your issue
    null_ls.setup({
        sources = {
            null_ls.builtins.diagnostics.pmd.with({
                extra_args = {
                    '--rulesets',
                    '~/.local/bin/pmd/rulesets/apex.xml'
                },
                filetypes = { 'apex' }
            })
        },
        debug = true,
    })
end

local function load_plugins()
    -- only add other plugins if they are necessary to reproduce the issue
    require("packer").startup({
        {
            "wbthomason/packer.nvim",
            {
                "jose-elias-alvarez/null-ls.nvim",
                requires = { "nvim-lua/plenary.nvim" },
                config = null_ls_config,
            },
        },
        config = {
            package_root = package_root,
            compile_path = compile_path,
        },
    })
end

if vim.fn.isdirectory(install_path) == 0 then
    vim.fn.system({ "git", "clone", "https://github.com/wbthomason/packer.nvim", install_path })
    load_plugins()
    require("packer").sync()
else
    load_plugins()
    require("packer").sync()
end

Steps to Reproduce

1. Create pmd.sh (https://pastebin.com/mj1R5YZn)
2. Add pmd.sh to PATH, and alias pmd command to id

if [ -d $HOME/.local/scripts ]; then
    PATH=$HOME/.local/scripts:$PATH
    [[ ! -f $HOME/.local/scripts/pmd.sh ]] || alias pmd='~/.local/scripts/pmd.sh'
fi

3. Make pmd.sh executable:
   
4. Add an apex class file to a directory (sample: https://pastebin.com/NtYH3Bdn)
5. Ensure pmd can be run as a command from the command line using the arguments passed by null-ls:
   
6. Open the apex class file inside neovim, I get this error:
   

Reproducibility Check

• I confirm that my minimal config is based on the minimal_init.lua template and that my issue is reproducible by running nvim --clean -u minimal_init.lua and following the steps above.

Expected Behavior

PMD is run for the file and results show up

Actual Behavior

Error message [null-ls] failed to run generator: ...site/pack/packer/start/null-ls.nvim/lua/null-ls/loop.lua:165: failed to spawn command pmd: EACCES: permission denied
is shown

Debug Log

[TRACE Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/client.lua:114: starting null-ls client
[TRACE Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/rpc.lua:106: received LSP request for method initialize
[TRACE Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method initialized
[TRACE Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/rpc.lua:131: received LSP notification for method textDocument/didOpen
[TRACE Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/generators.lua:21: running generators for method NULL_LS_DIAGNOSTICS_ON_OPEN
[DEBUG Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/helpers/generator_factory.lua:329: spawning command "pmd" at /home/fede/Programming/Salesforce/trigger-framework with args { "--format", "json", "--dir", "/home/fede/Programming/Salesforce/trigger-framework", "--rulesets", "~/.local/bin/pmd/rulesets/apex.xml" }
[WARN  Tue 13 Feb 2024 23:48:24 -03] /home/fede/.local/share/nvim/lazy/none-ls.nvim/lua/null-ls/generators.lua:94: failed to run generator: ....local/share/nvim/lazy/none-ls.nvim/lua/null-ls/loop.lua:165: failed to spawn command pmd: EACCES: permission denied

Help

No

Implementation Help

No response

Requirements

• I have read and followed the instructions above and understand that my issue will be closed if I did not provide the required information.

[Zephyr Lykos]

Resolving the alias is done within your shell. none-ls only exec the target binary directly instead of starting a subshell.

[Federico Abella]

Ah, got it. Thanks for clarifying that! Got it working like a charm 😁