fix: repair neovim job callbacks and vimscript regressions

Fix Neovim signal sending and job output routing, and restore valid Vimscript assignments/escaping that were breaking plumbing and register pastes.

Author: mcepl

plugin/acme.vim

@@ -205,7 +205,7 @@ function s:JobKill(job, sig)
 			let map = {'int': 2, 'hup': 1, 'term': 15, 'kill': 9}
 			let sig = get(map, sig, 15)
 		endif
-		silent! call luaeval("vim.loop.kill(vim.fn.jobpid(_A), _B)", [a:job, sig])
+		silent! call luaeval('vim.loop.kill(vim.fn.jobpid(_A[1]), _A[2])', [a:job, sig])
 	else
 		call job_stop(a:job, a:sig)
 	endif
@@ -258,9 +258,10 @@ function s:GetJobBufNr(job)
 	endif
 endfunc
 
-function s:NvimOut(id, data, event) dict
-	if empty(a:data) | return | endif
-	let b = self.buf
+function s:NvimOut(id, data, event)
+	if empty(a:data) || a:data == [''] | return | endif
+	let job = get(s:nvim_jobs, a:id, {})
+	let b = get(job, 'buf', -1)
 	if bufexists(b)
 		let mod = getbufvar(b, '&modifiable')
 		call setbufvar(b, '&modifiable', 1)
@@ -273,12 +274,12 @@ function s:NvimOut(id, data, event) dict
 		endif
 		call setbufvar(b, '&modifiable', mod)
 	endif
-	if has_key(self, 'callback') && !empty(self.callback)
-		call call(self.callback, [a:id, ''])
+	if has_key(job, 'callback') && !empty(job.callback)
+		call call(job.callback, [a:id, ''])
 	endif
 endfunc
 
-function s:NvimExit(id, status, event) dict
+function s:NvimExit(id, status, event)
 	if has_key(s:nvim_jobs, a:id)
 		call remove(s:nvim_jobs, a:id)
 	endif
@@ -290,9 +291,10 @@ function s:JobStartNvim(cmd, outb, ctxb, opts, inp)
 		\ 'on_exit': function('s:NvimExit'),
 		\ 'on_stdout': function('s:NvimOut'),
 		\ 'on_stderr': function('s:NvimOut'),
-		\ 'buf': a:outb,
-		\ 'callback': get(a:opts, 'callback', ''),
 	\ }
+	if a:inp != ''
+		let job_opts.stdin = 'pipe'
+	endif
 	if has_key(a:opts, 'cwd')
 		let job_opts.cwd = a:opts.cwd
 	endif
@@ -302,7 +304,10 @@ function s:JobStartNvim(cmd, outb, ctxb, opts, inp)
 	if job <= 0
 		return
 	endif
-	let s:nvim_jobs[job] = job_opts
+	let s:nvim_jobs[job] = {
+		\ 'buf': a:outb,
+		\ 'callback': get(a:opts, 'callback', ''),
+	\ }
 	call s:Started(job, s:BufWin(a:outb) != 0 ? a:outb : a:ctxb, a:cmd)
 	if a:inp != ''
 		call chansend(job, a:inp)
@@ -877,7 +882,7 @@ endfunc
 
 function s:Scroll(topline)
 	let v = winsaveview()
-	v.topline = a:topline
+	let v.topline = a:topline
 	call winrestview(v)
 endfunc
 
@@ -924,8 +929,8 @@ function s:Layout(col)
 			let s = float2nr(h / (n * (n > s:tops ? 1.75 : 1)))
 		endif
 		call win_move_statusline(win_id2win(w) - 1, winheight(w) - s)
-		h -= s
-		n -= 1
+		let h -= s
+		let n -= 1
 	endfor
 	call timer_start(0, {_ -> s:Fit(a:col)})
 endfunc
@@ -1402,4 +1407,4 @@ if s:ctrlexe != ''
 		\ })
 	endif
 	let $EDITOR = s:ctrlexe
-endif
+endif