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local M = {}
local s_err ---@type string?
local s_host ---@type string?
function M.require(host, prog)
local args = { prog, '-e', 'use Neovim::Ext; start_host();' }
-- Collect registered perl plugins into args
local perl_plugins = vim.fn['remote#host#PluginsForHost'](host.name) ---@type any
---@param plugin any
for _, plugin in ipairs(perl_plugins) do
table.insert(args, plugin.path)
end
return vim.fn['provider#Poll'](args, host.orig_name, '$NVIM_PERL_LOG_FILE')
end
--- @return string? path to detected perl, if any; nil if not found
--- @return string? error message if perl can't be detected; nil if success
function M.detect()
-- use g:perl_host_prog if set or check if perl is on the path
local prog = vim.fn.exepath(vim.g.perl_host_prog or 'perl')
if prog == '' then
return nil, 'No perl executable found'
end
-- if perl is available, make sure we have 5.22+
vim.fn.system({ prog, '-e', 'use v5.22' })
if vim.v.shell_error ~= 0 then
return nil, 'Perl version is too old, 5.22+ required'
end
-- if perl is available, make sure the required module is available
vim.fn.system({ prog, '-W', '-MNeovim::Ext', '-e', '' })
if vim.v.shell_error ~= 0 then
return nil, '"Neovim::Ext" cpan module is not installed'
end
return prog, nil
end
function M.call(method, args)
if s_err then
return
end
if not s_host then
-- Ensure that we can load the Perl host before bootstrapping
local ok, result = pcall(vim.fn['remote#host#Require'], 'legacy-perl-provider') ---@type any, any
if not ok then
s_err = result
vim.api.nvim_echo({ result, 'WarningMsg' }, true, {})
return
end
s_host = result
end
return vim.fn.rpcrequest(s_host, 'perl_' .. method, unpack(args))
end
function M.start()
-- The perl provider plugin will run in a separate instance of the perl host.
vim.fn['remote#host#RegisterClone']('legacy-perl-provider', 'perl')
vim.fn['remote#host#RegisterPlugin']('legacy-perl-provider', 'ScriptHost.pm', {})
end
return M
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