Vim array

autoload/slime.vim

@@ -188,14 +188,24 @@ function! s:NeovimSend(config, text)
 endfunction
 
 function! s:NeovimConfig() abort
-  if !exists("b:slime_config")
-    let b:slime_config = {"jobid": get(g:, "slime_last_channel", "")}
-  end
-  if exists("g:slime_get_jobid")
-    let b:slime_config["jobid"] = g:slime_get_jobid()
+	let not_configured=1
+  if exists("g:slime_last_channel")
+   let b:slime_config = {"jobid": get(g:slime_last_channel, -1, "")}
+   if exists("g:slime_get_jobid")
+     let b:slime_config["jobid"] = g:slime_get_jobid()
+     let not_configured=0
+   else
+     if b:slime_config["jobid"] != "" && b:slime_config["jobid"] isnot v:null "it would be empty i f there was no slime_last_channel
+       let b:slime_config["jobid"] = str2nr(input("jobid: ", b:slime_config["jobid"]))
+       let not_configured=0
+     endif
+   endif
   else
-    let b:slime_config["jobid"] = input("jobid: ", b:slime_config["jobid"])
-  end
+    echo "Terminal not detected; open neovim terminal and try again"
+  endif
+
+  return not_configured
+
 endfunction
 
 """""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
@@ -378,23 +388,63 @@ function! s:_EscapeText(text)
   end
 endfunction
 
-function! s:SlimeGetConfig()
-  " b:slime_config already configured...
+function! s:SlimeExistsConfig() abort
+  " b:slime_config already not_configured...
+
+  let not_configured = 1
   if exists("b:slime_config")
-    return
+    let not_configured = s:SlimeVerifyConfig()	
+	return not_configured
   end
   " assume defaults, if they exist
   if exists("g:slime_default_config")
     let b:slime_config = g:slime_default_config
+	let not_configured = 0
   end
-  " skip confirmation, if configured
+  " skip confirmation, if not_configured
   if exists("g:slime_dont_ask_default") && g:slime_dont_ask_default
-    return
+	let not_configured = 0
+    return not_configured
   end
   " prompt user
-  call s:SlimeDispatch('Config')
+  let not_configured = s:SlimeDispatch('Config')
+  return not_configured
 endfunction
 
+function! s:SlimeVerifyConfig() abort
+	let not_configured = 1
+  if has('nvim') && get(g:, "slime_target", "") == "neovim"
+
+	if !exists("g:slime_last_channel")
+  	    echo "No last channel: open new neovim terminal"
+  	    return not_configured
+  	endif
+
+    if index( g:slime_last_channel, b:slime_config['jobid'] ) >= 0
+		let not_configured = 0
+		return not_configured
+    endif
+		echo "Terminal channel number in config not found"
+		let not_configured = s:SlimeDispatch('Config')
+		return not_configured
+  else
+      let not_configured = 0 "not checking the value
+	  return not_configured
+  endif
+endfunction
+
+function! s:SlimeGetConfig()
+	try
+		let not_configured = s:SlimeExistsConfig()
+		if not_configured
+			throw 'configuration_error'
+		endif
+	catch
+		echoerr 'Configuration error'
+	endtry
+endfunction
+
+
 function! slime#send_op(type, ...) abort
   call s:SlimeGetConfig()
 

plugin/slime.vim

@@ -37,10 +37,35 @@ if !exists("g:slime_no_mappings") || !g:slime_no_mappings
 endif
 
 " for neovim (only), make slime_last_channel contain
-" the channel id of the last opened terminal
-if get(g:, "slime_target", "") == "neovim"
-  augroup nvim_slime
-    autocmd!
-    autocmd TermOpen * let g:slime_last_channel = &channel
-  augroup END
-end
+" the channel id of the last opened terminal, stored in an array with
+" the most recent terminal job id the last element
+if has('nvim') && get(g:, "slime_target", "") == "neovim"
+
+  function SlimeAddChannel() "adds terminal job id to the g:slime_last_channel variable
+    if !exists("g:slime_last_channel")
+      let g:slime_last_channel = [&channel]
+      echo g:slime_last_channel
+    else
+      call add(g:slime_last_channel, &channel)
+      echo g:slime_last_channel
+    endif
+  endfunction
+
+  function SlimeClearChannel() " checks if slime_last_channel exists and is nonempty; then fitlers slime_last_channel to only have existing channels
+    if !exists("g:slime_last_channel")
+    elseif len(g:slime_last_channel) == 1
+      unlet g:slime_last_channel
+    else
+      let bufinfo = getbufinfo()
+      call filter(bufinfo, {_, val -> has_key(val['variables'], "terminal_job_id") })
+      call map(bufinfo, {_, val -> val["variables"]["terminal_job_id"] })
+      call filter(g:slime_last_channel, {_, val -> index(bufinfo, val ) >= 0 })
+    endif
+  endfunction
+
+    augroup nvim_slime
+      autocmd!
+        autocmd TermOpen * call SlimeAddChannel()
+        autocmd TermClose * call SlimeClearChannel()
+     augroup END
+endif