Allow pressing 'q' to abort the running tasks, then 'R' to retry

README.md

@@ -315,7 +315,7 @@ vim.cmd('silent! colorscheme seoul256')
 - `S` - `PlugStatus`
 - `R` - Retry failed update or installation tasks
 - `U` - Update plugins in the selected range
-- `q` - Close the window
+- `q` - Abort the running tasks or close the window
 - `:PlugStatus`
     - `L` - Load plugin
 - `:PlugDiff`

plug.vim

@@ -783,10 +783,11 @@ endfunction
 function! s:syntax()
   syntax clear
   syntax region plug1 start=/\%1l/ end=/\%2l/ contains=plugNumber
-  syntax region plug2 start=/\%2l/ end=/\%3l/ contains=plugBracket,plugX
+  syntax region plug2 start=/\%2l/ end=/\%3l/ contains=plugBracket,plugX,plugAbort
   syn match plugNumber /[0-9]\+[0-9.]*/ contained
   syn match plugBracket /[[\]]/ contained
   syn match plugX /x/ contained
+  syn match plugAbort /\~/ contained
   syn match plugDash /^-\{1}\ /
   syn match plugPlus /^+/
   syn match plugStar /^*/
@@ -811,6 +812,7 @@ function! s:syntax()
   hi def link plug2       Repeat
   hi def link plugH2      Type
   hi def link plugX       Exception
+  hi def link plugAbort   Ignore
   hi def link plugBracket Structure
   hi def link plugNumber  Number
 
@@ -908,7 +910,7 @@ function! s:prepare(...)
     endif
   endfor
 
-  call s:job_abort()
+  call s:job_abort(0)
   if s:switch_in()
     if b:plug_preview == 1
       pc
@@ -944,6 +946,8 @@ function! s:close_pane()
   if b:plug_preview == 1
     pc
     let b:plug_preview = -1
+  elseif exists('s:jobs') && !empty(s:jobs)
+    call s:job_abort(1)
   else
     bd
   endif
@@ -1326,7 +1330,12 @@ function! s:update_finish()
   endif
 endfunction
 
-function! s:job_abort()
+function! s:mark_aborted(name, message)
+  let attrs = { 'running': 0, 'error': 1, 'abort': 1, 'lines': [a:message] }
+  let s:jobs[a:name] = extend(get(s:jobs, a:name, {}), attrs)
+endfunction
+
+function! s:job_abort(cancel)
   if (!s:nvim && !s:vim8) || !exists('s:jobs')
     return
   endif
@@ -1340,8 +1349,18 @@ function! s:job_abort()
     if j.new
       call s:rm_rf(g:plugs[name].dir)
     endif
+    if a:cancel
+      call s:mark_aborted(name, 'Aborted')
+    endif
   endfor
-  let s:jobs = {}
+
+  if a:cancel
+    for todo in values(s:update.todo)
+      let todo.abort = 1
+    endfor
+  else
+    let s:jobs = {}
+  endif
 endfunction
 
 function! s:last_non_empty_line(lines)
@@ -1355,6 +1374,16 @@ function! s:last_non_empty_line(lines)
   return ''
 endfunction
 
+function! s:bullet_for(job, ...)
+  if a:job.running
+    return a:job.new ? '+' : '*'
+  endif
+  if get(a:job, 'abort', 0)
+    return '~'
+  endif
+  return a:job.error ? 'x' : get(a:000, 0, '-')
+endfunction
+
 function! s:job_out_cb(self, data) abort
   let self = a:self
   let data = remove(self.lines, -1) . a:data
@@ -1363,10 +1392,9 @@ function! s:job_out_cb(self, data) abort
   " To reduce the number of buffer updates
   let self.tick = get(self, 'tick', -1) + 1
   if !self.running || self.tick % len(s:jobs) == 0
-    let bullet = self.running ? (self.new ? '+' : '*') : (self.error ? 'x' : '-')
     let result = self.error ? join(self.lines, "\n") : s:last_non_empty_line(self.lines)
     if len(result)
-      call s:log(bullet, self.name, result)
+      call s:log(s:bullet_for(self), self.name, result)
     endif
   endif
 endfunction
@@ -1380,7 +1408,7 @@ endfunction
 
 function! s:job_cb(fn, job, ch, data)
   if !s:plug_window_exists() " plug window closed
-    return s:job_abort()
+    return s:job_abort(0)
   endif
   call call(a:fn, [a:job, a:data])
 endfunction
@@ -1452,17 +1480,16 @@ function! s:reap(name)
   endif
 
   let more = len(get(job, 'queue', []))
-  let bullet = job.error ? 'x' : more ? (job.new ? '+' : '*') : '-'
   let result = job.error ? join(job.lines, "\n") : s:last_non_empty_line(job.lines)
   if len(result)
-    call s:log(bullet, a:name, result)
+    call s:log(s:bullet_for(job), a:name, result)
   endif
 
   if !job.error && more
     let job.spec.queue = job.queue
     let s:update.todo[a:name] = job.spec
   else
-    let s:update.bar .= job.error ? 'x' : '='
+    let s:update.bar .= s:bullet_for(job, '=')
     call s:bar()
   endif
 endfunction
@@ -1541,6 +1568,12 @@ while 1 " Without TCO, Vim stack is bound to explode
 
   let name = keys(s:update.todo)[0]
   let spec = remove(s:update.todo, name)
+  if get(spec, 'abort', 0)
+    call s:mark_aborted(name, 'Skipped')
+    call s:reap(name)
+    continue
+  endif
+
   let queue = get(spec, 'queue', [])
   let new = empty(globpath(spec.dir, '.git', 1))