97 lines
2.9 KiB
Lua
97 lines
2.9 KiB
Lua
---@toc_entry Auto implementation of interface methods
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---@tag gopher.nvim-impl
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---@text impl is utilizing the `impl` tool to generate method stubs for interfaces.
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---@usage
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--- 1. Automatically implement an interface for a struct:
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--- - Place your cursor on the struct where you want to implement the interface.
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--- - Run `:GoImpl io.Reader`
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--- - This will automatically determine the receiver and implement the `io.Reader` interface.
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---
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--- 2. Specify a custom receiver:
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--- - Place your cursor on the struct
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--- - Run `:GoImpl w io.Writer`, where:
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--- - `w` is the receiver.
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--- - `io.Writer` is the interface to implement.
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---
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--- 3. Explicitly specify the receiver, struct, and interface:
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--- - No need to place the cursor on the struct if all arguments are provided.
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--- - Run `:GoImpl r RequestReader io.Reader`, where:
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--- - `r` is the receiver.
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--- - `RequestReader` is the struct.
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--- - `io.Reader` is the interface to implement.
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---
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--- Example:
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--- >go
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--- type BytesReader struct{}
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--- // ^ put your cursor here
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--- // run `:GoImpl b io.Reader`
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---
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--- // this is what you will get
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--- func (b *BytesReader) Read(p []byte) (n int, err error) {
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--- panic("not implemented") // TODO: Implement
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--- }
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--- <
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local c = require("gopher.config").commands
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local r = require "gopher._utils.runner"
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local ts_utils = require "gopher._utils.ts"
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local u = require "gopher._utils"
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local impl = {}
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---@return string
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---@private
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local function get_struct()
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local ns = ts_utils.get_struct_under_cursor(unpack(vim.api.nvim_win_get_cursor(0)))
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if ns == nil then
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u.notify "put cursor on a struct or specify a receiver"
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return ""
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end
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vim.api.nvim_win_set_cursor(0, {
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ns.dim.e.r,
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ns.dim.e.c,
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})
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return ns.name
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end
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function impl.impl(...)
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local args = { ... }
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local iface, recv_name = "", ""
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local recv = get_struct()
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if #args == 0 then
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iface = vim.fn.input "impl: generating method stubs for interface: "
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vim.cmd "redraw!"
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if iface == "" then
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u.deferred_notify("usage: GoImpl f *File io.Reader", vim.log.levels.INFO)
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return
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end
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elseif #args == 1 then -- :GoImpl io.Reader
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recv = string.lower(recv) .. " *" .. recv
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vim.cmd "redraw!"
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iface = select(1, ...)
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elseif #args == 2 then -- :GoImpl w io.Writer
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recv_name = select(1, ...)
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recv = string.format("%s *%s", recv_name, recv)
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iface = select(#args, ...)
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elseif #args > 2 then
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iface = select(#args, ...)
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recv = select(#args - 1, ...)
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recv_name = select(#args - 2, ...)
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recv = string.format("%s %s", recv_name, recv)
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end
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local rs = r.sync { c.impl, "-dir", vim.fn.fnameescape(vim.fn.expand "%:p:h"), recv, iface }
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if rs.code ~= 0 then
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error("failed to implement interface: " .. rs.stderr)
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end
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local pos = vim.fn.getcurpos()[2]
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local output = u.remove_empty_lines(vim.split(rs.stdout, "\n"))
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table.insert(output, 1, "")
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vim.fn.append(pos, output)
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end
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return impl
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