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4fb48c5654
PROBLEM
------------------------------------------------------------------------
$NVIM_LISTEN_ADDRESS has conflicting purposes as both a parameter ("the
current process should listen on this address") and a descriptor ("the
current process is a child of this address").
This contradiction means the presence of NVIM_LISTEN_ADDRESS is
ambiguous, so child Nvim always tries to listen on its _parent's_
socket. This is the cause of lots of "Failed to start server" spam in
our test/CI logs:
WARN 2022-04-30… server_start:154: Failed to start server: address already in use: \\.\pipe\nvim-4480-0
WARN 2022-04-30… server_start:154: Failed to start server: address already in use: \\.\pipe\nvim-2168-0
SOLUTION
------------------------------------------------------------------------
1. Set $NVIM to the parent v:servername, *only* in child processes.
- Now the correct way to detect a "parent" Nvim is to check for $NVIM.
2. Do NOT set $NVIM_LISTEN_ADDRESS in child processes.
3. On startup if $NVIM_LISTEN_ADDRESS exists, unset it immediately after
server init.
4. Open a channel to parent automatically, expose it as v:parent.
Fixes #3118
Fixes #6764
Fixes #9336
Ref https://github.com/neovim/neovim/pull/8247#issuecomment-380275696
Ref #8696
57 lines
1.7 KiB
Lua
57 lines
1.7 KiB
Lua
local helpers = require('test.functional.helpers')(after_each)
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local eq, clear = helpers.eq, helpers.clear
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local missing_provider = helpers.missing_provider
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local command = helpers.command
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local write_file = helpers.write_file
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local eval = helpers.eval
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local retry = helpers.retry
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do
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clear()
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local reason = missing_provider('node')
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if reason then
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pending(string.format("Missing nodejs host, or nodejs version is too old (%s)", reason), function() end)
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return
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end
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end
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before_each(function()
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clear()
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end)
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describe('nodejs host', function()
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teardown(function ()
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os.remove('Xtest-nodejs-hello.js')
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os.remove('Xtest-nodejs-hello-plugin.js')
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end)
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it('works', function()
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local fname = 'Xtest-nodejs-hello.js'
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write_file(fname, [[
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const neovim = require('neovim');
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const nvim = neovim.attach({socket: process.env.NVIM});
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nvim.command('let g:job_out = "hello"');
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]])
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command('let g:job_id = jobstart(["node", "'..fname..'"])')
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retry(nil, 3000, function() eq('hello', eval('g:job_out')) end)
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end)
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it('plugin works', function()
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local fname = 'Xtest-nodejs-hello-plugin.js'
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write_file(fname, [[
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const neovim = require('neovim');
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const nvim = neovim.attach({socket: process.env.NVIM});
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class TestPlugin {
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hello() {
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this.nvim.command('let g:job_out = "hello-plugin"');
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}
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}
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const PluginClass = neovim.Plugin(TestPlugin);
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const plugin = new neovim.NvimPlugin(null, PluginClass, nvim);
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plugin.instance.hello();
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]])
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command('let g:job_id = jobstart(["node", "'..fname..'"])')
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retry(nil, 3000, function() eq('hello-plugin', eval('g:job_out')) end)
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end)
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end)
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