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vimrc.after_ftplugin('php', function(conf)
-- Find "composer.json" file upward from the base directory.
local function find_composer_json(base_dir)
return vim.fs.find('composer.json', {
path = base_dir,
upward = true,
stop = vim.loop.os_homedir(),
type = 'file',
})[1]
end
-- Read and decode JSON file.
local function load_json(file_path)
local ok_read, content = pcall(vim.fn.readblob, file_path)
if not ok_read then
return nil
end
local ok_decode, obj = pcall(vim.json.decode, content)
if not ok_decode then
return nil
end
return obj
end
-- Generate namespace declaration based on the current file name and autoload settings.
local function generate_namespace_declaration()
local current_dir = vim.fs.dirname(vim.api.nvim_buf_get_name(0))
local path_to_composer_json = find_composer_json(current_dir)
if not path_to_composer_json then
return nil -- failed to locate composer.json
end
local composer_json = load_json(path_to_composer_json)
if not composer_json then
return nil -- failed to load composer.json
end
local psr4 = vim.tbl_get(composer_json, 'autoload', 'psr-4')
if not psr4 then
return nil -- autoload.psr-4 section is absent
end
if vim.tbl_count(psr4) ~= 1 then
return nil -- psr-4 section is ambiguous
end
local psr4_namespace, psr4_dir
for k, v in pairs(psr4) do
psr4_namespace = k
psr4_dir = v
end
if psr4_namespace:sub(-1, -1) == '\\' then
psr4_namespace = psr4_namespace:sub(0, -2)
end
if psr4_dir:sub(-1, -1) == '/' then
psr4_dir = psr4_dir:sub(0, -2)
end
local namespace_root_dir = vim.fs.dirname(path_to_composer_json) .. '/' .. psr4_dir
if not vim.startswith(current_dir, namespace_root_dir) then
return nil
end
local current_path_suffix = current_dir:sub(#namespace_root_dir + 1)
local namespace = psr4_namespace .. current_path_suffix:gsub('/', '\\')
return ("namespace %s;"):format(namespace)
end
local function generate_template()
local lines = {
'<?php',
'',
'declare(strict_types=1);',
'',
}
local namespace_decl = generate_namespace_declaration()
if namespace_decl then
lines[#lines + 1] = namespace_decl
lines[#lines + 1] = ''
end
lines[#lines + 1] = ''
return lines
end
-- If a buffer is empty, insert a template and position the
-- cursor at the end of the buffer.
--
-- Example 1:
-- <?php
--
-- declare(strict_types=1);
--
-- [cursor]
--
-- Example 2 with namespace declaration:
-- <?php
--
-- declare(strict_types=1);
--
-- namespace Foo\Bar\Baz;
--
-- [cursor]
if vim.fn.line('$') == 1 and vim.fn.getline(1) == '' then
vim.fn.setline(1, generate_template())
vim.fn.cursor('$', 0)
end
end)
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